Trace Element and U–Pb Core Age for Zircons from Western Meiganga Gold Placer, Cameroon: Their Genesis and Archean-Proterozoic Sources
Abstract
:1. Introduction
2. Geological Settings
3. Materials and Methods
4. Results
4.1. Zircon Geochemistry
4.1.1. Minor Elements
4.1.2. Trace Elements
4.1.3. Rare Earth Elements
4.2. U–Pb Dating
5. Discussion
5.1. Geochemical Characterization Vis-Vis-Source and Genetic Constraints on Zircon
5.1.1. Geochemistry of Zircon and Possible Magmatic Segregation
Magmatic Affiliated Zircons
Source and Tectonic Frame Work
Metamorphic Affiliated Zircons
5.1.2. Detrital Zircon Geochronology and the Potential Source of Gold Placer
5.2. Potential Source Rock(s) and Area(s): Implications for Siliciclastic Components
6. Conclusions
Author Contributions
Acknowledgments
Conflicts of Interest
References
- Evans, M.A. Ore Geology and Industrial Minerals: An Introduction, 3rd ed.; Backwell Pubishing: Hoboken, NJ, USA, 1993; p. 403. [Google Scholar]
- Force, E.R. Placer Deposits. In Sedimentary and Diagenetic Mineral Deposits, a Basin Analysis Approach to Exploration; Force, E.R., Eidel, J.J., Maynard, J.B., Eds.; Economic Geologic Society: Littleton, CO, USA, 1991. [Google Scholar]
- Robb, L. Introduction to Ore-Forming Processes; Backwell Publishing: Hoboken, NJ, USA, 2005; p. 386. [Google Scholar]
- Eynatten, V.H.; Gaupp, R. Provenance of Cretaceous synorogenic sandstones in the Eastern Alps: Constraints from framework petrography, heavy mineral analysis and mineral chemistry. J. Sed. Geol. 1999, 124, 81–111. [Google Scholar] [CrossRef]
- Morton, C.A.; Claoue-Long, C.J.; Hallsworth, C.R. Zircon age and heavy mineral constraints of North Sea Carboniferous sandstones. Mar. Pet. Geol. 2001, 18, 319–337. [Google Scholar] [CrossRef]
- Pakhomova, A.V.; Zalishchak, L.B.; Odarichenko, G.E.; Lapina, I.M.; Karmanov, S.N. Study of melt inclusions in the Nezametnoye corundum deposit, Primorsky region of the Russian Far East: Petrogenetic consequences. J. Geochem. Explor. 2006, 89, 302–305. [Google Scholar] [CrossRef]
- Zack, T.; Eynatten, V.H.; Kronz, A. Rutile geochemistry and its potential use in quantitative provenance studies. J. Sed. Geol. 2004, 171, 37–58. [Google Scholar] [CrossRef]
- McClenaghan, B.M. Overview of processing methods for recovery of indicator minerals from sediment and bedrock samples. In Proceedings of the Workshop in the 25th International Applied Geochemistry Symposium, Rovaniemi, Finland, 22–26 August 2011; p. 72. [Google Scholar]
- Kanouo, S.N.; Yongue, F.R.; Shouyu, C.; Njonfang, E.; Ma, C.; Ghogumo, T.R.; Jiangnan, Z.; Sababa, E. Greyish black rutile megaclasts from the Nsanaragati Gem Placer, SW Cameroon: Geochemical features and genesis. J. Geogr. Geol. 2012, 3, 134–146. [Google Scholar] [CrossRef]
- Kanouo, S.N.; Zaw, K.; Yongue, F.R.; Sutherland, L.F.; Meffre, S.; Njonfang, E.; Ma, C.; Tchouatcha, S.T. U–Pb zircon age constraining the source and provenance of gem-bearing Late Cenozoic detrital deposit, Mamfe Basin, SW Cameroon. Resour. Geol. 2012, 62, 316–324. [Google Scholar] [CrossRef]
- Kanouo, S.N.; Yongue, F.R.; Ekomane, E.; Njonfang, E.; Ma, C.; Lentz, D.R.; She, Z.; Zaw, K.; Venkatesh, A.S. U–Pb ages for zircon grains from Nsanaragati Alluvial Gem Placers: Its correlation to the source rocks. Resour. Geol. 2015, 65, 103–121. [Google Scholar] [CrossRef]
- Kanouo, S.N.; Ekomane, E.; Yongue, F.R.; Njonfang, E.; Zaw, K.; Ma, C.; Ghogomu, R.T.; Lentz, D.R.; Venkatesh, A.S. Trace elements in corundum, chrysoberyl, and zircon: Application to mineral exploration and provenance study of the western Mamfe gem clastic deposits (SW Cameroon, Central Africa). J. Afr. Earth Sci. 2016, 113, 35–50. [Google Scholar] [CrossRef]
- Kanouo, S.N. Geology of the Western Mamfe Corundum Deposits, SW Region Cameroon: Petrography, Geochemistry, Geochronology, Genesis, and Origin. Ph.D. Thesis, University of Yaoundé I, Yaoundé, Cameroon, 2014. [Google Scholar]
- Taivalkoski, A.; Sarala, P.; Hulkki, H. Gold exploration using heavy minerals in till and weathered bedrock in Petäjäselkä, northern Finland. Geochem. Explor. Env. Analy. 2013, 15, 205–221. [Google Scholar] [CrossRef]
- Mbih, P.K.; Meffre, S.; Yongue, F.R.; Kanouo, S.N.; Thomson, J. Chemistry and origin of the Mayo Kila sapphires, NW region Cameroon (Central Africa): Their possible relationship with the Cameroon volcanic line. J. Afr. Earth Sci. 2016, 118, 263–273. [Google Scholar] [CrossRef]
- Fedo, M.C.; Keith, N.S.; Robert, H.R. Detrital Zircon Analysis of the Sedimentary Record. In Reviews in Mineralogy and Geochemistry; Mineralogical Society of America: Washington, DC, USA, 2003; Volume 53, pp. 277–333. [Google Scholar]
- Murphy, B.J.; Fernandez-Suarez, J.; Jeffries, T.; Strachan, R. U–Pb (LA-ICP-MS) dating of detrital zircons from Cambrian clastic rocks in Avalonia: Erosion of a Neoproterozoic arc along the northern Gondwana margin. J. Geol. Soc. Lond. 2004, 161, 243–254. [Google Scholar] [CrossRef]
- Paulsen, T.; Deering, C.; Sliwinski, J.; Bachmann, O.; Guillong, M. New detrital zircon age and trace element evidence for 1450 Ma igneous zircon sources in East Antarctica. Precambrian Res. 2017, 300, 53–58. [Google Scholar] [CrossRef]
- Veevers, J.J.; Belousova, A.E.; Saeed, A.; Sircombe, K.; Cooper, F.A.; Read, E.S. Pan-Gondwanaland detrital zircons from Australia analyzed for Hf-isotopes and trace elements reflect an ice-covered Antarctic provenance of 700–500 Ma age, TDM of 2.0–1.0 Ga, and alkaline affinity. Earth Sci. Rev. 2006, 76, 135–174. [Google Scholar] [CrossRef]
- Belousova, E.A.; Kostitsyn, Y.A.; Griffin, W.L.; Begg, G.C.; O’Reilly, S.Y.; Pearson, N.J. The growth of the continental crust: Constraints from zircon Hf-isotope data. Lithos 2010, 119, 457–466. [Google Scholar] [CrossRef]
- Dickinson, W.R.; Gehrels, G.E. Use of U–Pb ages of detrital zircons to infer maximum depositional ages of strata: A test against a Colorado Plateau Mesozoic database. Earth. Planet. Sci. Lett. 2009, 288, 115–125. [Google Scholar] [CrossRef]
- Makoundi, C.; Zaw, K.; Large, R.R.; Meffre, S.; Chun-Kit, L.; Hoe, G.T. Geology, geochemistry and metallogenesis of the Selinsing gold deposit, central Malaysia. Gondwana Res. 2013, 26, 241–261. [Google Scholar] [CrossRef]
- McQuarrie, N.; Long, P.S.; Tobgay, T.; Nesbit, N.J.; Gehrels, G.; Ducea, N.M. Documenting basin scale, geometry and provenance through detrital geochemical data: Lessons from the Neoproterozoic to Ordovician Lesser, Greater, and Tethyan Himalayan strata of Bhutan. Gondwana Res. 2013, 23, 1491–1510. [Google Scholar] [CrossRef]
- Kanouo, S.N.; Njonfang, E.; Kouské, P.A.; Yongue, F.R.; Ngueutchoua, G. U–Pb zircon age: Preliminary data evaluating the Earth history recorded by two basement rocks (granitic pegmatite and mica-Schist) in Mamfe Basin (SW Cameroon, Central Africa). J. Geol. Geophys. 2017, 6, 1–9. [Google Scholar] [CrossRef]
- Kresten, P.; Fels, P.; Berggren, G. Kimberlite zircons a possible aid in prospecting for kimberlites. Miner. Depos. 1975, 10, 47–56. [Google Scholar] [CrossRef]
- Sutherland, L.F.; Meffre, S. Zircon megacryst age and chemistry, from a placer, Dunedin volcanic area, eastern Otago, New Zealand. N. Z. J. Geol. Geophys. 2009, 52, 185–194. [Google Scholar] [CrossRef]
- Heaman, L.M.; Bowins, R.; Crocket, J. The chemical composition of igneous zircon suites: Implications for geochemical tracer studies. Geochem. Cosmochem. Acta 1990, 54, 1597–1607. [Google Scholar] [CrossRef]
- Ganwa, A.A. Les Granitoïdes de Méiganga: Etude Pétrographique, Géochimique, Structurale et Géochronologique. Leur Place Dans la Chaîne Panafricaine. Thèse de Doctorat d’État ès Sciences Naturelles, Université de Yaoundé I, Yaoundé, Cameroon, 2005. [Google Scholar]
- Abbelsalam, G.M.; Liégeois, P.J.; Stern, J.R. The Saharan Metacraton. J. Afr. Earth Sci. 2002, 34, 119–136. [Google Scholar] [CrossRef]
- Ngako, V.; Njonfang, E.; Affaton, P. Pan-African tectonics in northwestern Cameroon: Implication for the history of the western Gondwana. Gondwana Res. 2008, 14, 509–522. [Google Scholar] [CrossRef]
- Nzenti, J.P.; Barbey, P.; Macaudiere, J.; Soba, D. Origin and evolution of the Late Precambrian high-grade Yaoundé gneisses (Cameroon). Precambrian Res. 1988, 38, 91–109. [Google Scholar] [CrossRef]
- Nzenti, J.P. Neoproterozoic alkaline meta-igneous rocks from the Pan-African north Equatorial Fold Belt (Yaoundé, Cameroon): Biotitites and magnetite rich pyroxenites. J. Afr. Earth Sci. 1998, 26, 37–47. [Google Scholar] [CrossRef]
- Toteu, F.S.; Van Schmus, W.R.; Penaye, J.; Michard, A. New U–Pb and Sm–Nd data from north-central Cameroon and it bearing on the Pre-Pan African history of Central African. Precambrian Res. 2001, 108, 45–73. [Google Scholar] [CrossRef]
- Ngako, V.; Affaton, P.; Nnangue, J.M.; Njanko, T. Pan-African tectonic evolution in central and southern Cameroon: Transpression and transtension during sinistral shear movements. J Afr. Earth Sci. 2003, 36, 207–214. [Google Scholar] [CrossRef]
- Ganwa, A.A.; Frisch, W.; Siebel, W.; Ekodeck, E.G.; Shang, K.C.; Ngako, V. Archean Inheritances in the Pyroxene-Amphibole-Bearing Gneiss of the Méiganga Area (Central North Cameroon): Geochemical and 207Pb/206Pb Age Imprints. C. R. Geosci. 2008, 340, 211–222. [Google Scholar] [CrossRef]
- Ganwa, A.A.; Siebel, W.; Shang, K.C.; Naimou, S.; Ekodeck, G.E. New Constraints from Pb-Evaporation Zircon Ages of the Méiganga Amphibole-Biotite Gneiss, Central Cameroon, on Proterozoic Crustal Evolution. Int. J. Geosci. 2011, 2, 138–147. [Google Scholar]
- Ganwa, A.A.; Frisch, W.; Siebel, W.; Shang, C.K. Geochemistry of Magmatic Rocks and Time Constraints on Deformational Phases and Shear Zone Slip in the Méiganga Area, Central Cameroon. Int. Geol. Rev. 2011, 53, 759–784. [Google Scholar] [CrossRef]
- Ganwa, A.A.; Klotzli, S.U.; Hauzenberger, C. Evidence for Archean inheritance in the pre-Panafrican crust of Central Cameroon: Insight from zircon internal structure and LA-MC-ICP-MS U–Pb ages. J. Afr. Earth Sci. 2016, 120, 12–22. [Google Scholar] [CrossRef]
- Tetsopgang, S.; Suzuki, K.; Njonfang, E. Petrology and CHIME geochronology of Pan-African high K and Sr/Y granitoids in the Nkambe area, Cameroon. Gondwana Res. 2008, 14, 686–699. [Google Scholar] [CrossRef]
- Lasserre, M. Etude Géologique de la Partie Orientale de L’adamaoua (Cameroun Central) et les Principales Sources Minéralisées de L’adamaoua; Université de Clermont-Ferrand: Clermont-Ferrand, France, 1961. [Google Scholar]
- Kenna, H.S. Prospection des Indices de Minéralisations d’or Dans la Zone de Meiganga Ouest. Master’s Thesis, Université de Yaoundé I, Yaoundé, Cameroon, 2015. [Google Scholar]
- Moles, N.; Chapman, R. Placer gold microchemistry in conjunction with mineralogy and mineral chemistry of heavy mineral concentrates to characterize bedrock sources. In Proceedings of the 25th International Applied Geochemistry Symposium, Rovaniemi, Finland, 22–26 August 2011; pp. 19–25. [Google Scholar]
- Parfenoff, A.; Pomerol, C.; Tourenq, J. Les Minéraux en Grains. Méthodes D’étude et Détermination; Masson et Cie Edition: Paris, France, 1970; p. 571. [Google Scholar]
- Mange, A.M.; Maurer, W.F.H. Heavy Minerals in Colour, 1st ed.; Chapman and Hall: London, UK, 1992; p. 154. [Google Scholar]
- Cottle, J.M.; Waters, D.J.; Riley, D. Metamorphic history of the South Tibetan Detachment System, Mt. Everest region, revealed by RSCM thermometry and phase equilibria modelling. J. Metamorph. Geol. 2011, 29, 561–582. [Google Scholar] [CrossRef]
- Cottle, J.M.; Burrows, A.J.; Kylander-Clark, A.; Freedman, P.A.; Cohen, R. Enhanced sensitivity in laser ablation multi-collector inductively coupled plasma mass spectrometry. J. Anal. At. Spectrom. 2013. [Google Scholar] [CrossRef]
- Kylander-Clark, A.R.C.; Hacker, B.R.; Cottle, J.M. Laser-ablation split-stream ICP petrochronology. Chem. Geol. 2013, 345, 99–112. [Google Scholar] [CrossRef]
- Paton, C.; Woodhead, J.; Hellstrom, J.; Hergt, J.; Greig, A.; Maas, R. Improved laser ablation U–Pb zircon geochronology through robust down hole fractionation correction. Geochem. Geophys. Geosyst. 2010, 11. [Google Scholar] [CrossRef]
- Wiedenbeck, M.; Alle, P.; Corfu, F.; Grin, W.; Meier, M.; Oberli, F.; Von Quadt, A.; Roddick, J.; Spiegel, W. Three natural zircon standards for U–Th–Pb, Lu–Hf, trace element and REE analyses. Geostand. Newslett. 1995, 19, 1–23. [Google Scholar] [CrossRef]
- Jackson, S.; Pearson, N.; Griffin, W.; Belousova, E. The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U/Pb zircon geochronology. Chem. Geol. 2004, 657, 47–69. [Google Scholar] [CrossRef]
- Ludwig, K. User’s Manual for Isoplot 2.4: A Geochronological Toolkit for Microsoft Excel; Berkeley Geochronology Center: Berkeley, CA, USA, 2012. [Google Scholar]
- Vermeesch, P. On the visualisation of detrital age distributions. Chem. Geol. 2012, 312–313, 190–194. [Google Scholar] [CrossRef]
- Steiger, R.; Jager, E. Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. Earth Planet. Sci. Lett. 1977, 36, 359–362. [Google Scholar] [CrossRef]
- Belousova, A.E.; Griffin, L.W.; O’Reilly, Y.S.; Fisher, I.N. Igneous zircon: Trace element composition as an indicator of source rock type. J. Miner. Petrol. 2002, 143, 602–622. [Google Scholar] [CrossRef]
- Dawaï, D.; Jean-Luc Bouchez, L.J.; Paquette, L.J.; Tchameni, R. The Pan-African quartz-syenite of Guider (north-Cameroon): Magnetic fabric and U–Pb dating of a late orogenic emplacement. Precambrian Res. 2013, 236, 132–144. [Google Scholar] [CrossRef]
- Ahrens, L.H.; Cherry, R.D.; Erlank, A.J. Observations on the Th–U relationship in zircons from granitic rocks and from kimberlites. Geochim Cosmochim. Acta 1967, 31, 2379–2387. [Google Scholar] [CrossRef]
- Rubatto, D. Zircon trace element geochemistry: Partitioning with garnet and link between U–Pb ages and metamorphism. Chem. Geol. 2002, 184, 123–138. [Google Scholar] [CrossRef]
- Konzett, J.; Armstrong, R.A.; Sweeny, R.J.; Compston, W. The timing of Marid suite metasomatism in the Kaapvaal mantle: An ion probe study of zircons from Marid xenoliths. Earth Planet. Sci. Lett. 1998, 160, 133–145. [Google Scholar] [CrossRef]
- McDonough, F.W.; Sun, S.S. The composition of the Earth. Chem. Geol. 1995, 120, 223–253. [Google Scholar] [CrossRef]
- Kirkland, C.L.; Smithies, R.H.; Taylor, R.J.M.; Evans, N.; McDonald, B. Zircon Th/U ratios in magmatic environs. Lithos 2015, 212–215, 397–414. [Google Scholar] [CrossRef]
- Sutherland, F.L.; Coenraads, R.R.; Abduryim, A.; Meffre, S.; Hoskin, O.W.P.; Giuliani, G.; Beattie, R.; Wuhrer, R.; Sutherland, B.G. Corundum (sapphire) and zircon relationships, Lava Plains gem fields, NE Australia: Integrated mineralogy, geochemistry, age determination, genesis and geographical typing. Miner. Mag. 2015, 79, 545–581. [Google Scholar] [CrossRef]
- Shang, C.K.; Satir, M.; Siebel, W.; Nsifa, E.N.; Taubald, H.; Liegeois, J.P.; Tchoua, F.M. Major and trace element geochemistry, Rb–Sr and Sm–Nd systematics of TTG magmatism in the Congo craton: Case of the Sangmelima region, Ntem complex, southern Cameroon. J. Afr. Earth Sci. 2004, 40, 61–79. [Google Scholar] [CrossRef]
- Wan, Y.; Liu, D.; Dong, C.; Liu, S.; Wang, S.; Yang, E. U–Th–Pb behavior of zircons under high-grade metamorphic conditions: A case study of zircon dating of met-adiorite near Qixia, eastern Shandong. Geosci. Front. 2011, 2, 137–146. [Google Scholar] [CrossRef]
- Hiess, J.; Nutman, A.P.; Bennett, V.C.; Holden, P. Ti-in-zircon thermometry applied to contrasting Archean metamorphic and igneous systems. Chem. Geol. 2008, 247, 323–338. [Google Scholar] [CrossRef]
- Hoskin, P.W.O.; Schaltegger, U. The composition of zircon and igneous and metamorphic petrogenesis. In Reviews in Mineralogy and Geochemistry; Mineralogical Society of America: Washington, DC, USA, 2003; Volume 53, pp. 27–55. [Google Scholar]
- Kröner, A.; Jaeckel, P.; Williams, I.S. Pb-loss patterns in zircons from a high grade metamorphic terrain as revealed by different dating methods: U–Pb and Pb–Pb ages of igneous and metamorphic zircons from Northern Sri Lanka. Precambrian Res. 1994, 66, 151–181. [Google Scholar] [CrossRef]
- Whitehouse, M.J.; Kamber, B.S.; Moorbath, S. Age significance of U–Th–Pb zircon data from early Archean rocks of west Greenland-a reassessment based on combined ion-probe and imaging studies. Chem. Geol. 1999, 160, 201–224. [Google Scholar] [CrossRef]
- Shang, C.K.; Siebel, W.; Satir, M.; Chen, F.; Mvondo, J.O. Zircon Pb–Pb and U–Pb systematics of TTG rocks in the Congo craton: Constraints of crustal formation, crystallization and Pan-African lead loss. Bull. Geosci. 2004, 79, 205–219. [Google Scholar]
- Shang, K.C.; Liégeois, P.J.; Satir, M.; Frisch, W.; Nsifa, E.N. Late Archaean high-K granite geochronology of the northern metacratonic margin of the Archaean Congo craton, Southern Cameroon: Evidence for Pb-loss due to non-metamorphic causes. Gondwana Res. 2010. [Google Scholar] [CrossRef]
- Watson, E.B.; Wark, A.D.; Thomas, B.J. Crystallization thermometers for zircon and rutile. Contrib. Miner. Petrol. 2006, 151, 413–433. [Google Scholar] [CrossRef]
- Cherniak, D.J.; Watson, E.B. Ti diffusion in zircon. Chem. Geol. 2007, 242, 470–483. [Google Scholar] [CrossRef]
- Murali, A.V.; Parthasarathly, R.; Mahadevan, T.M.; Sankar Das, M. Trace elements characteristics, REE patterns and partition coefficient of zircons from different geological environment-A case study of Indian zircons. Geochem. Cosmochem. Acta 1983, 47, 2047–2052. [Google Scholar] [CrossRef]
- Fu, B.; Page, F.Z.; Cavosie, A.J.; Fournelle, J.; Kita, N.T.; Lackey, J.S.; Wilde, S.A.; Valley, J.W. Ti-in-zircon thermometry: Applications and limitations. Contrib. Miner. Petrol. 2008. [Google Scholar] [CrossRef]
- Grimes, C.B.; John, E.B.; Cheadle, J.M.; Mazdab, K.F.; Wooden, L.J.; Swapp, S.; Schwartz, J.J. On the occurrence, trace element geochemistry, and crystallization history of zircon from in situ ocean lithosphere. Contrib. Miner. Petrol. 2009. [Google Scholar] [CrossRef]
- Hoskin, P.W.O.; Black, L.P. Metamorphic zircon formation by solid-state recrystallization of protolith ignous zircon. J. Met. Petrol. 2000, 18, 423–439. [Google Scholar] [CrossRef]
- Bucher, K.; Grapes, R. Petrogenesis of Metamorphic Rocks, 8th ed.; Springer: Berlin/Heidelberg, Germany, 2011; p. 441. [Google Scholar]
- Black, R.; Liegeois, P.J. Cratons, mobile belts, alkaline rocks and continental lithospheric mantle: The Pan-African testimony. J. Geol. Soc. Lond. 1993, 150, 89–98. [Google Scholar] [CrossRef]
- Kröner, A.; Stern, J.R. Pan-African Orogeny; Encyclopedia of Geology; Elsevier: Amsterdam, The Netherlands, 2004; Volume 1, pp. 1–12. [Google Scholar]
- Lasserre, M.; Soba, D. Age Libérien des granodiorites et des gneiss à pyroxènes du Cameroun Méridional. Bull. BRGM 1976, 2, 17–32. [Google Scholar]
- Kumar, A.; Venkatesh, A.S.; Kumar, P.; Rai, A.K.; Parihar, P.S. Geochemistry of Archean Radioactive Quartz Pebble Conglomerates and Quartzites from western margin of Singhbhum-Orissa Craton, eastern India: Implications on Paleo-weathering, Provenance and Tectonic Setting. Ore Geol. Rev. 2017, 89, 390–406. [Google Scholar] [CrossRef]
- Toteu, S.F.; Van Schmus, W.R.; Penaye, J.; Nyobé, J.B. U–Pb and Sm–Nd evidence for Eburnean and Pan-African high-grade metamorphism in cratonic rocks of southern Cameroon. Precambrian Res. 1994, 108, 45–73. [Google Scholar] [CrossRef]
- Pouclet, A.; Tchameni, R.; Mezger, K.; Vidal, M.; Nsifa, E.; Shang, C.; Penaye, J. Archean crustal accretion at the northern border of the Congo Craton (South Cameroon). The charnockite-TTG link. Bull. Soc. 2007, 5, 331–342. [Google Scholar]
- Vicat, J.P.; Leger, J.M.; Nsifa, E.; Piguet, P.; Nzenti, J.P.; Tchameni, R.; Pouclet, A. Distinction au sein du craton congolais du Sud-Ouest du Cameroun, de deux episodes doleritiques initiant les cycles orogeniques eburneen (Paleoproterozoïque) et Pan-Africain (Neoproterozoïque). C. R. Acad. Sci. 1996, 323, 575–582. [Google Scholar]
- Tchameni, R.; Mezger, K.; Nsifa, N.E.; Pouclet, A. Crustal origin of Early Proterozoic syenites in the Congo craton (Ntem complex), South Cameroon. Lithos 2001, 57, 23–42. [Google Scholar] [CrossRef]
- Vicat, J.P.; Pouclet, A.; Nkoumbou, C.; Mouangué, S.A. The fissural volanisms of Lower Dja, Yokadouma (Cameroon) and Nola (RCA) Series-Geotectonic meaning. C. R. Acad. Sci. 1997, 325, 671–677. [Google Scholar]
Spot/Grain Number | Hf | Y | U | Th | Pb | Ti | Nb | Ta | Sr | Hf/Y | Th/U | Nb/Ta | Ti-in-Zircon T | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | ±2σ | |||||||||||||
MW001 | 12,580 | 720 | 451 | 14 | 4 | 2.4 | 2.1 | 3.04 | 0.19 | 17.47 | 0.032 | 0.691 | 62 | 106 |
MW002 | 10,410 | 228 | 83 | 40 | 47 | 15.1 | 0.5 | 0.56 | 0.06 | 45.66 | 0.477 | 0.891 | 786 | 154 |
MW003 | 10,950 | 387 | 55 | 137 | 128 | 8.3 | 1.5 | 1.49 | 0.1 | 28.3 | 2.457 | 1.007 | 729 | 58 |
MW004 | 11,300 | 1065 | 220 | 307 | 289 | 9.4 | 4.4 | 3.79 | 0.19 | 10.61 | 1.383 | 1.161 | 740 | 48 |
MW005 | 12,380 | 571 | 169 | 153 | 143 | 10 | 2.2 | 2.19 | 0.14 | 21.68 | 0.91 | 1.005 | 746 | 74 |
MW006 | 12,140 | 1014 | 799 | 285 | 140 | 58.8 | 4 | 7.84 | 0.49 | 11.97 | 0.355 | 0.511 | 945 | 42 |
MW007 | 12,850 | 412 | 126 | 55 | 56 | 9 | 1.4 | 1.95 | 0.07 | 31.19 | 0.431 | 0.718 | 736 | 109 |
MW008 | 10,800 | 595 | 249 | 170 | 189 | 8.2 | 1.2 | 0.93 | 0.12 | 18.15 | 0.683 | 1.291 | 728 | 61 |
MW009 | 12,710 | 702 | 302 | 271 | 243 | 15.1 | 4.1 | 3.23 | 0.15 | 18.11 | 0.894 | 1.269 | 786 | 68 |
MW010 | 11,900 | 1109 | 288 | 409 | 341 | 7.7 | 2.4 | 2.02 | 0.14 | 10.73 | 1.418 | 1.188 | 722 | 40 |
MW011 | 11,690 | 1186 | 222 | 393 | 360 | 5.6 | 4 | 2.58 | 0.27 | 9.86 | 1.776 | 1.551 | 694 | 73 |
MW012 | 10,780 | 621 | 107 | 165 | 222 | 8.7 | 2.8 | 1.37 | 0.1 | 17.36 | 1.531 | 2.044 | 733 | 66 |
MW013 | 10,550 | 354 | 84 | 38 | 42 | 4.1 | 0.4 | 0.31 | 0.13 | 29.8 | 0.429 | 1.291 | 669 | 81 |
MW014 | 11,510 | 1104 | 326 | 447 | 401 | 5.1 | 2.7 | 2.15 | 0.16 | 10.43 | 1.37 | 1.256 | 686 | 71 |
MW015 | 12,380 | 136 | 212 | 8 | 8 | 3.8 | 1 | 2.15 | 0.05 | 91.03 | 0.038 | 0.465 | 662 | 58 |
MW016 | 12,020 | 204 | 223 | 60 | 73 | 5.8 | 0.9 | 1.32 | 0.06 | 58.92 | 0.267 | 0.682 | 697 | 57 |
MW017 | 11,710 | 910 | 210 | 260 | 251 | 6.2 | 2 | 1.63 | 0.13 | 12.87 | 1.238 | 1.227 | 703 | 67 |
MW018 | 12,340 | 702 | 259 | 184 | 149 | 12.8 | 4.8 | 3.24 | 0.11 | 17.58 | 0.707 | 1.482 | 770 | 35 |
MW019 | 12,170 | 435 | 236 | 208 | 233 | 6.9 | 1 | 1.78 | 0.13 | 27.98 | 0.881 | 0.562 | 712 | 47 |
MW020 | 6390 | 144 | 100 | 46 | 58 | 7 | 0.8 | 0.83 | 0.04 | 44.38 | 0.461 | 0.964 | 713 | 35 |
MW021 | 11,030 | 460 | 257 | 309 | 282 | 8.3 | 2.3 | 2.15 | 0.11 | 23.98 | 1.202 | 1.07 | 729 | 53 |
MW022 | 10,960 | 622 | 204 | 13 | 4 | 3.9 | 2.5 | 2.2 | 0.17 | 17.62 | 0.065 | 1.136 | 665 | 89 |
MW023 | 13,020 | 824 | 1042 | 432 | 168 | 47 | 2.2 | 3.48 | 1.79 | 15.8 | 0.409 | 0.632 | 915 | 41 |
MW024 | 11,210 | 1747 | 713 | 859 | 443 | 19.9 | 5.6 | 3.52 | 3.1 | 6.42 | 1.215 | 1.591 | 815 | 25 |
MW025 | 12,150 | 535 | 107 | 58 | 58 | 4.9 | 1.3 | 1.12 | 0.12 | 22.71 | 0.539 | 1.161 | 683 | 58 |
MW026 | 10,640 | 465 | 67 | 63 | 77 | 13.9 | 0.9 | 0.7 | 0.09 | 22.88 | 0.947 | 1.286 | 778 | 73 |
MW027 | 10,920 | 470 | 316 | 255 | 224 | 7.3 | 4.2 | 3.24 | 0.08 | 23.24 | 0.791 | 1.296 | 717 | 59 |
MW028 | 11,020 | 524 | 211 | 173 | 166 | 3.9 | 2.5 | 2.1 | 0.13 | 21.03 | 0.824 | 1.191 | 665 | 75 |
MW029 | 10,690 | 730 | 224 | 248 | 246 | 6.1 | 3.5 | 2.65 | 0.12 | 14.64 | 1.105 | 1.321 | 701 | 65 |
MW030 | 10,960 | 790 | 210 | 314 | 314 | 15.2 | 3.6 | 3.07 | 0.16 | 13.87 | 1.477 | 1.173 | 787 | 75 |
MW031 | 10,640 | 562 | 362 | 268 | 216 | 7.7 | 4.6 | 2.94 | 0.13 | 18.93 | 0.736 | 1.565 | 722 | 35 |
MW032 | 9240 | 237 | 117 | 56 | 75 | 6.9 | 1 | 0.81 | 0.04 | 38.99 | 0.477 | 1.235 | 712 | 44 |
MW033 | 10,860 | 405 | 292 | 247 | 213 | 6 | 4.6 | 3.09 | 0.09 | 26.82 | 0.842 | 1.489 | 700 | 69 |
MW034 | 10,250 | 141 | 437 | 93 | 100 | 3.3 | 0.6 | 1.28 | 0.04 | 72.7 | 0.21 | 0.469 | 651 | 59 |
MW035 | 10,990 | 1230 | 220 | 309 | 301 | 5.6 | 2.5 | 2.19 | 0.27 | 8.94 | 1.402 | 1.142 | 694 | 63 |
MW036 | 10,760 | 1477 | 304 | 616 | 618 | 3.8 | 3.1 | 2.34 | 0.25 | 7.29 | 2.012 | 1.325 | 662 | 58 |
MW037 | 10,610 | 901 | 148 | 300 | 292 | 5.7 | 2.4 | 2.08 | 0.17 | 11.78 | 2.024 | 1.154 | 696 | 86 |
MW038 | 10,470 | 808 | 250 | 372 | 364 | 5.7 | 4.4 | 3.57 | 0.17 | 12.96 | 1.468 | 1.233 | 696 | 79 |
MW039 | 8370 | 90 | 218 | 60 | 73 | 7.1 | 0.2 | 0.09 | 0.05 | 93 | 0.274 | 2.222 | 715 | 40 |
MW040 | 10,320 | 747 | 197 | 297 | 290 | 5.2 | 3.5 | 3.14 | 0.23 | 13.82 | 1.49 | 1.115 | 688 | 74 |
MW041 | 9850 | 613 | 87 | 132 | 176 | 5.6 | 1.6 | 1.71 | 0.13 | 16.07 | 1.522 | 0.936 | 694 | 66 |
MW042 | 9950 | 710 | 218 | 307 | 287 | 5.8 | 3.5 | 2.78 | 0.14 | 14.02 | 1.393 | 1.259 | 697 | 44 |
MW043 | 11,310 | 953 | 344 | 413 | 400 | 5.3 | 3.1 | 2.14 | 0.18 | 11.87 | 1.203 | 1.449 | 690 | 69 |
MW044 | 11,270 | 830 | 293 | 83 | 78 | 4.3 | 2.1 | 2.42 | 0.18 | 13.58 | 0.285 | 0.868 | 672 | 52 |
MW045 | 9450 | 598 | 166 | 194 | 189 | 6 | 2.5 | 1.93 | 0.12 | 15.81 | 1.175 | 1.295 | 700 | 46 |
MW046 | 9910 | 1466 | 299 | 624 | 607 | 4.9 | 2.3 | 2.64 | 0.23 | 6.76 | 2.096 | 0.871 | 683 | 47 |
MW047 | 8840 | 352 | 79 | 122 | 123 | 4.6 | 2.1 | 2.15 | 0.07 | 25.12 | 1.563 | 0.977 | 678 | 66 |
MW048 | 12,500 | 166 | 189 | 47 | 45 | 133 | 0.8 | 0.75 | 0.09 | 75.3 | 0.249 | 1.067 | 1065 | 79 |
MW049 | 10,080 | 782 | 93 | 262 | 259 | 6 | 3.5 | 2.54 | 0.15 | 12.89 | 2.822 | 1.378 | 700 | 62 |
MW050 | 11,120 | 412 | 196 | 126 | 154 | 5.3 | 1 | 1.39 | 0.13 | 26.99 | 0.643 | 0.719 | 690 | 58 |
MW051 | 9700 | 354 | 135 | 99 | 108 | 7.4 | 1.7 | 2.32 | 0.17 | 27.4 | 0.743 | 0.733 | 718 | 127 |
MW052 | 9050 | 82 | 115 | 4 | 1 | 1.3 | 0.6 | 0.99 | 0.05 | 110.37 | 0.038 | 0.606 | 584 | 88 |
MW053 | 10,100 | 482 | 280 | 225 | 186 | 6 | 2.4 | 1.83 | 0.07 | 20.96 | 0.81 | 1.312 | 700 | 56 |
MW054 | 10,950 | 491 | 343 | 289 | 349 | 7.3 | 1.2 | 1.8 | 0.14 | 22.3 | 0.842 | 0.667 | 717 | 53 |
MW055 | 9060 | 545 | 392 | 132 | 171 | 8.7 | 1.3 | 1.39 | 0.17 | 16.63 | 0.328 | 0.935 | 733 | 63 |
MW056 | 10,420 | 447 | 988 | 316 | 152 | 32.5 | 3.2 | 4.81 | 3.48 | 23.31 | 0.321 | 0.665 | 870 | 28 |
MW057 | 10,060 | 313 | 112 | 90 | 90 | 8.2 | 1.2 | 1 | 0.13 | 32.14 | 0.796 | 1.2 | 728 | 66 |
MW058 | 10,900 | 413 | 230 | 6 | 2 | 1.4 | 2.8 | 4.77 | 0.2 | 26.39 | 0.025 | 0.587 | 589 | 61 |
MW059 | 10,470 | 460 | 233 | 161 | 149 | 3.9 | 2.4 | 2.64 | 0.12 | 22.76 | 0.684 | 0.909 | 665 | 66 |
MW060 | 10,240 | 393 | 202 | 154 | 151 | 5.8 | 3 | 2.61 | 0.09 | 26.06 | 0.762 | 1.15 | 697 | 41 |
MW061 | 9970 | 505 | 120 | 86 | 107 | 2.8 | 1.5 | 1.59 | 0.16 | 19.74 | 0.716 | 0.943 | 638 | 42 |
MW062 | 9760 | 916 | 231 | 328 | 333 | 4.1 | 2.3 | 2.09 | 0.2 | 10.66 | 1.379 | 1.101 | 669 | 59 |
MW063 | 9620 | 472 | 370 | 282 | 261 | 6.2 | 4.3 | 2.91 | 0.13 | 20.38 | 0.759 | 1.478 | 703 | 54 |
MW064 | 10,170 | 795 | 389 | 174 | 163 | 4.6 | 4.3 | 3.33 | 0.17 | 12.79 | 0.446 | 1.291 | 678 | 49 |
MW065 | 11,810 | 244 | 127 | 2 | 1 | 2.2 | 1.5 | 2.63 | 0.09 | 48.4 | 0.014 | 0.57 | 621 | 70 |
MW066 | 9700 | 441 | 297 | 273 | 263 | 4.5 | 3.9 | 2.58 | 0.11 | 22 | 0.93 | 1.512 | 676 | 50 |
MW067 | 10,410 | 337 | 422 | 60 | 65 | 9.8 | 0.7 | 1.28 | 0.23 | 30.89 | 0.139 | 0.547 | 744 | 66 |
MW068 | 9580 | 392 | 126 | 169 | 170 | 4.5 | 2 | 1.49 | 0.07 | 24.44 | 1.342 | 1.342 | 676 | 63 |
MW069 | 9720 | 478 | 249 | 218 | 213 | 4.5 | 3.9 | 2.67 | 0.12 | 20.34 | 0.887 | 1.461 | 676 | 63 |
MW070 | 9080 | 313 | 101 | 111 | 112 | 3.1 | 2.1 | 1.7 | 0.09 | 29.01 | 1.109 | 1.235 | 646 | 39 |
MW071 | 9920 | 616 | 385 | 106 | 117 | 3.8 | 1.4 | 1.99 | 0.18 | 16.11 | 0.278 | 0.704 | 662 | 58 |
MW072 | 9400 | 348 | 267 | 77 | 94 | 2 | 0.9 | 1.2 | 0.06 | 27.01 | 0.288 | 0.75 | 613 | 55 |
MW073 | 9850 | 345 | 165 | 194 | 179 | 4.6 | 3 | 2.09 | 0.1 | 28.55 | 1.178 | 1.435 | 678 | 45 |
MW074 | 9700 | 567 | 301 | 211 | 197 | 3.8 | 1.5 | 1.67 | 0.18 | 17.11 | 0.708 | 0.898 | 661 | 47 |
MW075 | 9670 | 554 | 243 | 307 | 278 | 5.6 | 3.5 | 2.94 | 0.13 | 17.46 | 1.269 | 1.191 | 694 | 45 |
MW076 | 8660 | 210 | 480 | 101 | 141 | 5.2 | 0.7 | 1.19 | 0.06 | 41.24 | 0.209 | 0.588 | 688 | 34 |
MW077 | 8940 | 755 | 258 | 392 | 400 | 4.1 | 4.9 | 3.24 | 0.15 | 11.84 | 1.527 | 1.513 | 669 | 33 |
MW078 | 9410 | 360 | 171 | 143 | 139 | 4.4 | 2.5 | 2.45 | 0.11 | 26.14 | 0.828 | 1.021 | 674 | 51 |
MW079 | 9770 | 458 | 269 | 209 | 206 | 3.9 | 3.8 | 2.89 | 0.1 | 21.33 | 0.778 | 1.315 | 664 | 40 |
MW080 | 8910 | 292 | 494 | 97 | 138 | 2.7 | 0.7 | 1.19 | 0.05 | 30.52 | 0.195 | 0.588 | 636 | 77 |
MW081 | 9430 | 81 | 255 | 50 | 55 | 2.1 | 0.3 | 0.84 | 0.05 | 116.42 | 0.194 | 0.357 | 618 | 87 |
MW082 | 9630 | 626 | 358 | 160 | 158 | 4.4 | 2.9 | 3.53 | 0.14 | 15.38 | 0.449 | 0.822 | 674 | 68 |
MW083 | 9530 | 335 | 407 | 17 | 5 | 1.3 | 1.4 | 2.39 | 0.08 | 28.45 | 0.042 | 0.586 | 584 | 99 |
MW084 | 9240 | 134 | 280 | 70 | 74 | 2.6 | 0.5 | 0.95 | 0.06 | 68.96 | 0.25 | 0.526 | 633 | 66 |
MW085 | 8030 | 218 | 67 | 144 | 146 | 3.2 | 1.2 | 0.89 | 0.07 | 36.84 | 2.132 | 1.348 | 649 | 55 |
MW086 | 9490 | 665 | 204 | 198 | 193 | 38.9 | 4.3 | 2.42 | 0.19 | 14.27 | 0.968 | 1.777 | 892 | 62 |
MW087 | 9010 | 467 | 115 | 121 | 123 | 3.8 | 2.5 | 2.39 | 0.1 | 19.29 | 1.065 | 1.046 | 662 | 53 |
MW088 | 9350 | 700 | 170 | 221 | 227 | 3.4 | 2 | 1.42 | 0.17 | 13.36 | 1.307 | 1.408 | 654 | 63 |
MW089 | 8760 | 590 | 229 | 200 | 185 | 3.8 | 3.9 | 2.67 | 0.32 | 14.85 | 0.862 | 1.461 | 661 | 39 |
MW090 | 7020 | 327 | 86 | 90 | 134 | 3.6 | 1.9 | 0.98 | 0.07 | 21.47 | 1.057 | 1.939 | 658 | 60 |
MW091 | 9240 | 1494 | 273 | 435 | 437 | 4.1 | 2.7 | 2.05 | 0.24 | 6.18 | 1.582 | 1.317 | 669 | 63 |
MW092 | 9160 | 615 | 210 | 269 | 248 | 3.1 | 3.4 | 2.89 | 0.14 | 14.89 | 1.267 | 1.176 | 647 | 63 |
MW093 | 9160 | 1867 | 353 | 462 | 629 | 5.3 | 4.8 | 3.24 | 0.42 | 4.91 | 1.323 | 1.482 | 690 | 66 |
MW094 | 9190 | 898 | 249 | 207 | 197 | 4.3 | 2.9 | 2.77 | 0.16 | 10.23 | 0.831 | 1.047 | 672 | 51 |
MW095 | 9310 | 554 | 281 | 494 | 466 | 5.1 | 4.5 | 2.6 | 0.12 | 16.81 | 1.748 | 1.731 | 686 | 45 |
MW096 | 9780 | 1134 | 649 | 651 | 713 | 14.3 | 6.9 | 4.27 | 0.27 | 8.63 | 1.012 | 1.616 | 781 | 152 |
MW097 | 7570 | 750 | 71 | 145 | 180 | 7.6 | 0.8 | 1.33 | 0.16 | 10.09 | 2.024 | 0.602 | 721 | 89 |
MW098 | 9540 | 217 | 374 | 81 | 104 | 2.3 | 0.6 | 1.18 | 0.03 | 43.96 | 0.214 | 0.508 | 623 | 66 |
MW099 | 10,000 | 781 | 345 | 280 | 287 | 4.3 | 2.9 | 2.69 | 0.17 | 12.81 | 0.816 | 1.078 | 672 | 48 |
MW100 | 7500 | 119 | 11 | 21 | 34 | 7.4 | 0.3 | 0.27 | 0.04 | 63.03 | 1.957 | 1.111 | 718 | 155 |
MW101 | 9300 | 210 | 231 | 107 | 128 | 5.4 | 0.9 | 0.96 | 0.16 | 44.29 | 0.456 | 0.938 | 691 | 57 |
MW102 | 10,360 | 283 | 177 | 58 | 55 | 4.3 | 1.7 | 1.78 | 0.06 | 36.61 | 0.322 | 0.955 | 672 | 65 |
MW103 | 9790 | 333 | 70 | 113 | 115 | 4.7 | 1.4 | 1.5 | 0.07 | 29.4 | 1.613 | 0.933 | 679 | 34 |
MW104 | 9820 | 159 | 380 | 94 | 104 | 4.7 | 0.8 | 0.95 | 0.1 | 61.76 | 0.246 | 0.842 | 680 | 56 |
MW105 | 8970 | 533 | 233 | 275 | 267 | 5.8 | 3.8 | 3.3 | 0.13 | 16.83 | 1.174 | 1.152 | 697 | 44 |
MW106 | 9320 | 349 | 197 | 156 | 144 | 5.5 | 1.4 | 1.45 | 0.11 | 26.71 | 0.784 | 0.966 | 693 | 67 |
MW107 | 9470 | 275 | 318 | 68 | 87 | 1.9 | 0.6 | 1.31 | 0.08 | 34.44 | 0.213 | 0.458 | 612 | 82 |
MW108 | 11,460 | 421 | 115 | 23 | 30 | 3.8 | 1.7 | 2.28 | 0.1 | 27.22 | 0.195 | 0.746 | 662 | 43 |
MW109 | 9550 | 988 | 280 | 320 | 335 | 9.2 | 2.2 | 2.05 | 0.22 | 9.67 | 1.142 | 1.073 | 738 | 65 |
MW110 | 8540 | 451 | 145 | 165 | 259 | 7.9 | 0.7 | 0.71 | 0.12 | 18.94 | 1.14 | 0.986 | 724 | 53 |
MW111 | 9040 | 471 | 167 | 172 | 182 | 6.5 | 1.4 | 1 | 0.2 | 19.19 | 0.991 | 1.4 | 707 | 71 |
MW112 | 9720 | 261 | 167 | 45 | 52 | 4.5 | 0.6 | 0.27 | 0.09 | 37.24 | 0.268 | 2.222 | 676 | 54 |
MW113 | 7120 | 244 | 31 | 10 | 15 | 3.9 | 0.4 | 0.23 | 0.06 | 29.18 | 0.306 | 1.739 | 664 | 46 |
MW114 | 10,070 | 1502 | 295 | 641 | 659 | 9.6 | 3.4 | 2.47 | 0.26 | 6.71 | 2.193 | 1.377 | 742 | 65 |
MW115 | 10,260 | 448 | 189 | 17 | 5 | 1.1 | 2 | 3.74 | 0.12 | 22.91 | 0.092 | 0 .535 | 571 | 114 |
Spot/Grain Number | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | ∑REE | Gd/Yb | Lu/Hf | Eu/Eu* | Ce/Ce* | Lun/Smn | Yb/Sm |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MW001 | 0.01 | 14 | 0.031 | 0.3 | 1 | 0.65 | 6 | 2.3 | 36 | 18 | 106 | 27 | 287 | 69 | 567.83 | 0.022 | 0.0055 | 0.786 | 268.16 | 412.203 | 261.214 |
MW002 | bdl | 330 | 0.1 | 12.6 | 5.8 | 2.65 | 10 | 2.6 | 21 | 6 | 25 | 5 | 43 | 10 | 473.53 | 0.242 | 0.001 | 1.04 | - | 10.3625 | 6.815 |
MW003 | bdl | bdl | 0.1 | bdl | 3.6 | 0.45 | 8 | 2.5 | 25 | 9 | 48 | 11 | 110 | 22 | 238.698 | 0.07 | 0.002 | 0.261 | - | 37.117 | 27.986 |
MW004 | bdl | bdl | 0.1 | bdl | 10.3 | 0.79 | 22 | 7.6 | 78 | 30 | 130 | 29 | 286 | 58 | 652.058 | 0,078 | 0.0051 | 0.159 | - | 33.878 | 25.525 |
MW005 | bdl | bdl | 0.1 | bdl | 4.3 | 0.33 | 11 | 3.7 | 39 | 15 | 76 | 16 | 173 | 33 | 371.96 | 0.064 | 0.0027 | 0.146 | - | 46.591 | 36.984 |
MW006 | bdl | bdl | 7.8 | 1020 | 37.1 | 13.9 | 33 | 10.1 | 83 | 28 | 123 | 27 | 235 | 46 | 1663.24 | 0.138 | 0.0038 | 1.22 | - | 7.50816 | 5.823 |
MW007 | bdl | 218 | 0.1 | 1.2 | 1.6 | 0.5 | 8 | 2.9 | 28 | 11 | 54 | 12 | 113 | 23 | 472.896 | 0.067 | 0.0018 | 0.441 | - | 87.7531 | 66.163 |
MW008 | bdl | 151 | 0.1 | 5.3 | 7.7 | 2.35 | 21 | 5.7 | 53 | 17 | 69 | 14 | 139 | 26 | 511.547 | 0.15 | 0.0024 | 0.566 | - | 20.5491 | 16.582 |
MW009 | bdl | 202 | 0.1 | 4.5 | 6.4 | 0.85 | 16 | 5.7 | 49 | 18 | 80 | 17 | 161 | 30 | 590.589 | 0.097 | 0.0024 | 0.258 | - | 28.0132 | 23.154 |
MW010 | bdl | 230 | 0.2 | 6.2 | 10.4 | 3.23 | 35 | 11.4 | 87 | 30 | 125 | 25 | 229 | 42 | 833.157 | 0.152 | 0.0035 | 0.518 | - | 24.0651 | 20.206 |
MW011 | bdl | 49 | 0.1 | 1.1 | 4.5 | 0.79 | 23 | 9.2 | 84 | 32 | 147 | 31 | 288 | 54 | 722.845 | 0.079 | 0.0046 | 0.237 | - | 72.3288 | 58.832 |
MW012 | bdl | 45 | 0.1 | 1.7 | 3.4 | 0.62 | 21 | 7.5 | 54 | 18 | 77 | 15 | 132 | 24 | 401.475 | 0.161 | 0.0023 | 0.222 | - | 43.1254 | 35.903 |
MW013 | bdl | 2 | 0.01 | 0.02 | 0.028 | 0.15 | 3 | 1.6 | 20 | 9 | 49 | 12 | 147 | 33 | 278.568 | 0.023 | 0.0032 | 1.484 | - | 7176.54 | 4826.087 |
MW014 | bdl | 78 | 0.2 | 2.5 | 7.7 | 2.39 | 36 | 10.7 | 89 | 32 | 132 | 26 | 233 | 44 | 692.115 | 0.153 | 0.0038 | 0.44 | - | 34.3451 | 27.853 |
MW015 | bdl | 2 | 0.0049 | bdl | 0.1 | 0.2 | 1 | 0.6 | 10 | 3 | 1 8 | 4 | 49 | 11 | 100.8249 | 0.029 | 0.0009 | 2.074 | - | 1143.09 | 756.85 |
MW016 | bdl | 3 | 0.013 | 0.017 | 0.3 | 0.11 | 4 | 1.1 | 13 | 5 | 27 | 6 | 65 | 15 | 138.28 | 0.057 | 0.0013 | 0.331 | - | 325.952 | 211.757 |
MW017 | bdl | 26 | 0.1 | 0.9 | 2 | 0.44 | 15 | 5.9 | 69 | 23 | 117 | 25 | 226 | 43 | 553.821 | 0.068 | 0.0037 | 0.244 | - | 132.236 | 105.458 |
MW018 | bdl | 47 | 0.3 | 1.7 | 3.5 | 0.96 | 22 | 5.5 | 53 | 19 | 85 | 18 | 163 | 32 | 449.779 | 0.133 | 0.0025 | 0.335 | - | 53.9921 | 42.689 |
MW019 | bdl | 10 | 0.048 | 0.5 | 1 | 0.38 | 7 | 2.4 | 28 | 12 | 57 | 14 | 147 | 33 | 312.308 | 0.048 | 0.0027 | 0.449 | - | 210.252 | 142.243 |
MW020 | bdl | 3 | 0.013 | 0.2 | 0.4 | 0.19 | 2 | 0.7 | 9 | 4 | 22 | 6 | 59 | 11 | 116.636 | 0.036 | 0.0017 | 0.623 | - | 172.158 | 139.302 |
MW021 | bdl | 37 | 0.1 | 0.6 | 1.4 | 0.34 | 9 | 2.5 | 33 | 13 | 57 | 12 | 133 | 27 | 325.609 | 0.071 | 0.0024 | 0.288 | - | 118.113 | 89.898 |
MW022 | bdl | 2 | 0.005 | bdl | 0.2 | 0.46 | 4 | 1.7 | 32 | 16 | 108 | 30 | 339 | 71 | 604.555 | 0.01 | 0.0064 | 1.759 | - | 2356.37 | 1731.263 |
MW023 | bdl | 35 | 2.8 | 9.8 | 3.9 | 3.91 | 17 | 5.2 | 65 | 22 | 110 | 23 | 217 | 41 | 555.47 | 0.076 | 0.0031 | 1.482 | - | 62.4647 | 50.958 |
MW024 | bdl | 48 | 0.7 | 5.5 | 8.5 | 2.17 | 50 | 12.3 | 147 | 53 | 221 | 44 | 381 | 68 | 1040.33 | 0.131 | 0.006 | 0.322 | - | 47.9177 | 41.204 |
MW025 | bdl | 5 | 0.023 | 0.4 | 0.9 | 0.23 | 10 | 3.4 | 36 | 16 | 69 | 13 | 108 | 20 | 292.287 | 0.092 | 0.0016 | 0.244 | - | 138.514 | 115.655 |
MW026 | bdl | 12 | 0.1 | 0.5 | 1.3 | 0.53 | 9 | 3 | 48 | 14 | 65 | 13 | 126 | 23 | 303.886 | 0.073 | 0.0021 | 0.46 | - | 101.019 | 86.094 |
MW027 | bdl | 45 | 0.1 | 1.4 | 1.6 | 0.42 | 15 | 3.7 | 43 | 15 | 63 | 13 | 123 | 24 | 347.265 | 0.123 | 0.0022 | 0.265 | - | 91.2019 | 72.135 |
MW028 | bdl | 40 | 0.1 | 1.5 | 2.5 | 0.55 | 14 | 4.2 | 47 | 17 | 68 | 16 | 148 | 24 | 381.734 | 0.092 | 0.0022 | 0.29 | - | 59.6735 | 55.118 |
MW029 | bdl | 36 | 0.1 | 1.4 | 2 | 0.32 | 15 | 4.3 | 59 | 22 | 101 | 21 | 185 | 37 | 484.025 | 0.083 | 0.0035 | 0.176 | - | 112.203 | 85.169 |
MW030 | bdl | 21 | 0.049 | 1 | 2 | 0.3 | 13 | 4.9 | 62 | 22 | 112 | 24 | 241 | 43 | 545.699 | 0.054 | 0.0039 | 0.179 | - | 128.447 | 110.77 |
MW031 | bdl | 30 | 0.1 | 1.6 | 2.4 | 0.81 | 18 | 4.2 | 52 | 19 | 77 | 17 | 154 | 28 | 403.705 | 0.119 | 0.0026 | 0.375 | - | 70.6146 | 59.985 |
MW032 | bdl | 9 | 0.02 | 1.1 | 1.1 | 0.79 | 9 | 2.2 | 23 | 7 | 30 | 6 | 56 | 9 | 155.27 | 0.165 | 0.001 | 0.749 | - | 50.1355 | 46.542 |
MW033 | bdl | 44 | 0.3 | 2.5 | 1.5 | 0.38 | 11 | 2.8 | 36 | 13 | 54 | 12 | 122 | 21 | 320.877 | 0.093 | 0.0019 | 0.275 | - | 81.6493 | 72.764 |
MW034 | bdl | 4 | 0.021 | 0.4 | 0.6 | 0.27 | 4 | 1 | 12 | 5 | 17 | 4 | 40 | 7 | 94.806 | 0.092 | 0.0007 | 0.561 | - | 75.4671 | 64.025 |
MW035 | bdl | 31 | 0.1 | 2 | 3.2 | 0.31 | 25 | 7.7 | 105 | 37 | 170 | 34 | 306 | 54 | 776.26 | 0.082 | 0.0049 | 0.106 | - | 102.088 | 87.904 |
MW036 | bdl | 36 | 0.1 | 3.3 | 4.3 | 0.57 | 33 | 10.2 | 128 | 52 | 219 | 46 | 419 | 74 | 1026.421 | 0.079 | 0.0069 | 0.146 | - | 104.582 | 89.992 |
MW037 | bdl | 30 | 0.2 | 2.9 | 2.8 | 0.41 | 19 | 5.4 | 78 | 29 | 131 | 28 | 250 | 49 | 625.474 | 0.076 | 0.0046 | 0.169 | - | 103.685 | 81.462 |
MW038 | bdl | 27 | 0.2 | 2.3 | 2.8 | 0.35 | 17 | 5.1 | 68 | 26 | 120 | 25 | 234 | 46 | 573.706 | 0.072 | 0.0044 | 0.155 | - | 98.2727 | 76.55 |
MW039 | bdl | 1 | bdl | 0.1 | 0.1 | 0.15 | 1 | 0.2 | 6 | 3 | 15 | 4 | 54 | 12 | 96.543 | 0.013 | 0.0014 | 1.503 | - | 515.679 | 351.287 |
MW040 | bdl | 26 | 0.2 | 1.5 | 2.6 | 0.45 | 17 | 4.9 | 66 | 26 | 118 | 26 | 257 | 47 | 592.677 | 0.067 | 0.0046 | 0.204 | - | 107.791 | 89.488 |
MW041 | bdl | 28 | 0.1 | 0.7 | 1.9 | 0.27 | 13 | 4 | 52 | 20 | 84 | 18 | 171 | 32 | 428.857 | 0.072 | 0.0032 | 0.169 | - | 98.9272 | 82.875 |
MW042 | bdl | 27 | 0.1 | 1.1 | 1.9 | 0.38 | 14 | 4.4 | 60 | 23 | 106 | 22 | 211 | 40 | 510.261 | 0.066 | 0.0041 | 0.227 | - | 129.977 | 103.723 |
MW043 | bdl | 41 | 0.1 | 1.1 | 3.3 | 0.34 | 19 | 6.3 | 79 | 30 | 146 | 30 | 293 | 54 | 702.823 | 0.064 | 0.0048 | 0.132 | - | 98.9948 | 81.563 |
MW044 | bdl | 7 | 0.035 | 0.4 | 1.3 | 0.1 | 12 | 5.1 | 72 | 29 | 129 | 27 | 242 | 46 | 572.106 | 0.051 | 0.0041 | 0.076 | - | 207.875 | 166.22 |
MW045 | bdl | 37 | 0.1 | 0.9 | 2.6 | 0.41 | 14 | 4.4 | 55 | 20 | 89 | 18 | 175 | 32 | 449.417 | 0.08 | 0.0034 | 0.207 | - | 74.0463 | 61.873 |
MW046 | bdl | 33 | 0.2 | 3.4 | 7.2 | 0.74 | 43 | 13.1 | 148 | 52 | 220 | 48 | 421 | 75 | 1064.231 | 0.103 | 0.0076 | 0.128 | - | 62.5858 | 53.751 |
MW047 | bdl | 24 | 0.023 | 1 | 1.3 | 0.35 | 9 | 2.4 | 29 | 10 | 48 | 10 | 139 | 20 | 252.614 | 0.088 | 0.0022 | 0.315 | - | 89.113 | 68.08 |
MW048 | bdl | 5 | 0.1 | 0.6 | 0.7 | 0.15 | 3 | 1 | 13 | 5 | 26 | 6 | 140 | 13 | 135.353 | 0.058 | 0.0011 | 0.285 | - | 111.004 | 78.331 |
MW049 | bdl | 50 | 0.1 | 1.1 | 2.2 | 0.25 | 17 | 5.5 | 68 | 27 | 126 | 26 | 44 | 44 | 607.242 | 0.069 | 0.0044 | 0.124 | - | 119.781 | 100.245 |
MW050 | bdl | 7 | 0.0117 | 0.3 | 0.8 | 0.28 | 8 | 2.7 | 34 | 14 | 65 | 15 | 137 | 28 | 314.8147 | 0.06 | 0.0026 | 0.329 | - | 205.93 | 153.947 |
MW051 | bdl | 18 | 0.048 | 0.6 | 1.6 | 0.18 | 5 | 2.5 | 31 | 11 | 52 | 12 | 151 | 22 | 294.968 | 0.036 | 0.0022 | 0.195 | - | 82.2476 | 81.453 |
MW052 | bdl | 3 | bdl | bdl | 0.1 | 0.06 | 1 | 0.3 | 5 | 2 | 14 | 4 | 44 | 11 | 84.179 | 0.025 | 0.0012 | 0.545 | - | 634.716 | 399.876 |
MW053 | bdl | 18 | 0.1 | 1.3 | 4 | 0.62 | 17 | 4.7 | 52 | 16 | 74 | 14 | 137 | 25 | 364.86 | 0.126 | 0.0024 | 0.227 | - | 36.9077 | 31.498 |
MW054 | bdl | 33 | 0.1 | 1.1 | 2.3 | 0.52 | 13 | 4.1 | 41 | 17 | 72 | 16 | 151 | 27 | 376.477 | 0.083 | 0.0025 | 0.296 | - | 71.559 | 61.149 |
MW055 | bdl | 13 | 0.1 | 1.4 | 4.4 | 0.78 | 16 | 4.9 | 53 | 21 | 93 | 20 | 192 | 43 | 461.918 | 0.082 | 0,0047 | 0.287 | - | 59.3347 | 40.481 |
MW056 | bdl | 22 | 0.1 | 0.9 | 1.9 | 0.44 | 9 | 3 | 35 | 14 | 70 | 17 | 172 | 35 | 379.904 | 0.051 | 0.0034 | 0.334 | - | 113.821 | 85.366 |
MW057 | bdl | 12 | 0.031 | 0.5 | 0.6 | 0.08 | 6 | 2 | 25 | 11 | 53 | 12 | 124 | 24 | 270.042 | 0.05 | 0.0024 | 0.131 | - | 251.205 | 200.14 |
MW058 | bdl | 1 | bdl | bdl | 0.2 | 0.15 | 1 | 1.2 | 20 | 13 | 84 | 25 | 289 | 61 | 496.55 | 0.005 | 0.0056 | 0.965 | - | 2144.62 | 1562.733 |
MW059 | bdl | 25 | 0.1 | 0.8 | 1.4 | 0.11 | 8 | 3.6 | 40 | 16 | 74 | 16 | 165 | 32 | 381.926 | 0.049 | 0,0031 | 0.105 | - | 143.329 | 111.189 |
MW060 | bdl | 37 | 0.1 | 1.7 | 2.2 | 0.29 | 10 | 3.7 | 39 | 14 | 61 | 13 | 129 | 23 | 332.934 | 0.081 | 0.0023 | 0.184 | - | 64.3599 | 55.07 |
MW061 | bdl | 13 | 0.017 | 0.5 | 1.2 | 0.13 | 6 | 2.9 | 36 | 15 | 83 | 20 | 206 | 44 | 427.891 | 0.028 | 0.0044 | 0.153 | - | 213.259 | 153.956 |
MW062 | bdl | 25 | 0.1 | 1.5 | 2.1 | 0.35 | 17 | 6.5 | 81 | 32 | 152 | 34 | 306 | 63 | 719.894 | 0.054 | 0.0065 | 0.182 | - | 183.685 | 135.89 |
MW063 | bdl | 32 | 0.1 | 1.3 | 2 | 0.12 | 10 | 4 | 44 | 16 | 74 | 15 | 147 | 38 | 372.128 | 0.068 | 0.0029 | 0.083 | - | 82.0938 | 66.567 |
MW064 | bdl | 32 | 0.4 | 6.1 | 5.1 | 1.14 | 22 | 6.5 | 72 | 27 | 114 | 24 | 209 | 41 | 561.009 | 0.107 | 0.0041 | 0.326 | - | 48.7933 | 37.82 |
MW065 | bdl | 4 | 0.01 | bdl | 0.3 | 0.18 | 3 | 1.2 | 17 | 7 | 42 | 11 | 131 | 31 | 246.378 | 0.019 | 0.0026 | 0.681 | - | 738.797 | 482.425 |
MW066 | bdl | 44 | 0.1 | 2.1 | 2.7 | 0.62 | 14 | 4.5 | 43 | 15 | 68 | 13 | 128 | 22 | 356.051 | 0.108 | 0.0022 | 0.31 | - | 48.7563 | 43.639 |
MW067 | bdl | 5 | 0.1 | 0.8 | 1.1 | 0.3 | 5 | 2.3 | 29 | 13 | 57 | 12 | 117 | 22 | 263.702 | 0.043 | 0.0021 | 0.379 | - | 117.663 | 95.017 |
MW068 | bdl | 23 | 0.1 | 0.8 | 1.7 | 0.11 | 8 | 3.2 | 33 | 14 | 62 | 13 | 119 | 22 | 299.389 | 0.07 | 0.0023 | 0.093 | - | 76.8942 | 64.457 |
MW069 | bdl | 41 | 0.1 | 1.8 | 2.3 | 0.54 | 12 | 3.7 | 42 | 16 | 77 | 16 | 147 | 27 | 386.205 | 0.082 | 0.0028 | 0.313 | - | 71.5091 | 59.268 |
MW070 | bdl | 18 | 0.04 | 0.6 | 1 | 0.11 | 6 | 2 | 26 | 11 | 51 | 11 | 111 | 21 | 258.48 | 0.058 | 0.0023 | 0.136 | - | 134.256 | 107.311 |
MW071 | bdl | 6 | 0.023 | 0.6 | 1.9 | 0.37 | 14 | 4.7 | 56 | 21 | 99 | 21 | 211 | 41 | 476.01 | 0.066 | 0.0041 | 0.218 | - | 130.193 | 102.626 |
MW072 | bdl | 4 | 0.0042 | 0.1 | 0.5 | 0.35 | 7 | 2.5 | 32 | 12 | 56 | 11 | 120 | 21 | 264.7862 | 0.054 | 0.0022 | 0.56 | - | 234.23 | 203.768 |
MW073 | bdl | 24 | 0.038 | 0.9 | 1.3 | 0.09 | 7 | 2.3 | 30 | 11 | 54 | 12 | 116 | 23 | 280.683 | 0.059 | 0.0023 | 0.087 | - | 104.59 | 82.097 |
MW074 | bdl | 12 | 0.0276 | 0.4 | 1 | 0.23 | 10 | 3.5 | 42 | 19 | 90 | 20 | 192 | 36 | 425.9446 | 0.05 | 0.0037 | 0.222 | - | 212.058 | 174.749 |
MW075 | bdl | 34 | 0.1 | 0.8 | 1.7 | 0.19 | 12 | 4.1 | 52 | 20 | 91 | 20 | 178 | 35 | 448.726 | 0.065 | 0.0036 | 0.13 | - | 126.888 | 99.28 |
MW076 | bdl | 4 | 0.1 | 0.4 | 1 | 0.39 | 5 | 1.8 | 21 | 8 | 31 | 7 | 60 | 11 | 150.083 | 0.084 | 0.0012 | 0.544 | - | 67.7621 | 58.155 |
MW077 | bdl | 27 | 0.1 | 0.9 | 2 | 0.27 | 15 | 5.3 | 66 | 26 | 119 | 25 | 267 | 45 | 598.908 | 0.057 | 0.005 | 0.152 | - | 135.214 | 123.96 |
MW078 | bdl | 14 | 0.023 | 0.4 | 0.7 | 0.09 | 6 | 1.9 | 29 | 12 | 64 | 15 | 162 | 32 | 335.941 | 0.035 | 0.0034 | 0.136 | - | 275.889 | 212.742 |
MW079 | bdl | 32 | 0.1 | 0.9 | 1.8 | 0.23 | 9 | 3.4 | 38 | 15 | 69 | 15 | 143 | 28 | 354.659 | 0.061 | 0.0028 | 0.176 | - | 91.7397 | 72.829 |
MW080 | bdl | 4 | 0.1 | 0.8 | 1.9 | 0.46 | 9 | 2.8 | 29 | 10 | 39 | 7 | 74 | 12 | 191.144 | 0.12 | 0.0014 | 0.345 | - | 40.2054 | 36.523 |
MW081 | bdl | 2 | 0.0064 | 0.2 | 0.5 | 0.19 | 2 | 0.7 | 8 | 3 | 13 | 3 | 22 | 5 | 59.5164 | 0.077 | 0.0005 | 0.622 | - | 56.6236 | 39.654 |
MW082 | bdl | 12 | 0.0122 | 0.4 | 1.5 | 0.11 | 11 | 4.1 | 53 | 22 | 102 | 23 | 206 | 39 | 473.1912 | 0.053 | 0.0041 | 0.082 | - | 158.027 | 126.06 |
MW083 | bdl | 3 | 0.1 | 0.1 | 0.4 | 0.19 | 3 | 1.5 | 26 | 12 | 56 | 15 | 149 | 29 | 295.043 | 0.017 | 0.003 | 0.551 | - | 404.349 | 318.532 |
MW084 | bdl | 5 | 0.1 | 0.8 | 0.9 | 0.41 | 3 | 1.2 | 13 | 4 | 18 | 3 | 33 | 5 | 87.375 | 0.08 | 0.0006 | 0.799 | - | 34.3055 | 31.978 |
MW085 | bdl | 24 | 0.031 | 0.4 | 0.7 | 0.29 | 5 | 1.3 | 21 | 8 | 37 | 9 | 87 | 18 | 210.341 | 0.061 | 0.0022 | 0.468 | - | 157.141 | 119.229 |
MW086 | bdl | 24 | 0.1 | 1 | 2.2 | 0.26 | 15 | 4.8 | 64 | 25 | 113 | 24 | 231 | 42 | 545.592 | 0.066 | 0.0044 | 0.137 | - | 115.59 | 98.309 |
MW087 | bdl | 21 | 0.026 | 0.7 | 2.1 | 0.27 | 11 | 3.2 | 44 | 16 | 69 | 16 | 147 | 28 | 357.176 | 0.076 | 0.0031 | 0.168 | - | 77.3118 | 62.973 |
MW088 | bdl | 29 | 0.1 | 1.1 | 1.9 | 0.28 | 12 | 4.5 | 60 | 25 | 111 | 23 | 219 | 43 | 530.421 | 0.057 | 0,0045 | 0.174 | - | 136.006 | 107.083 |
MW089 | bdl | 41 | 0.2 | 2.1 | 4.2 | 0.83 | 19 | 4.8 | 63 | 23 | 93 | 18 | 175 | 30 | 472.53 | 0.107 | 0.0034 | 0.285 | - | 42.5854 | 38.255 |
MW090 | bdl | 25 | 0.1 | 1.6 | 2.8 | 0.77 | 13 | 3 | 33 | 12 | 48 | 10 | 104 | 19 | 272.28 | 0.125 | 0.0026 | 0.389 | - | 39.6817 | 33.999 |
MW091 | bdl | 26 | 0.2 | 2.5 | 9.8 | 0.93 | 43 | 12.5 | 158 | 51 | 224 | 42 | 402 | 64 | 1036.783 | 0.106 | 0.0069 | 0.139 | - | 39.1057 | 37.708 |
MW092 | bdl | 20 | 0.046 | 0.5 | 1.5 | 0.2 | 12 | 3.9 | 56 | 21 | 100 | 24 | 223 | 43 | 505.611 | 0.055 | 0.0047 | 0.138 | - | 172.918 | 135.453 |
MW093 | bdl | 51 | 0.1 | 1.3 | 5.6 | 0.64 | 40 | 12.7 | 177 | 68 | 291 | 59 | 555 | 92 | 1353.305 | 0.072 | 0.0101 | 0.131 | - | 100.054 | 91.925 |
MW094 | bdl | 14 | 0.038 | 0.5 | 2.9 | 0.13 | 17 | 5.8 | 75 | 31 | 143 | 32 | 298 | 51 | 669.605 | 0.057 | 0.0055 | 0.055 | - | 105.233 | 94.137 |
MW095 | bdl | 44 | 0.1 | 0.7 | 2.6 | 0.18 | 14 | 4.4 | 49 | 18 | 83 | 18 | 162 | 29 | 424.713 | 0.085 | 0.0032 | 0.091 | - | 67.7694 | 57.057 |
MW096 | bdl | 34 | 0.1 | 1.3 | 5.4 | 0.58 | 25 | 8.4 | 96 | 36 | 161 | 36 | 337 | 64 | 804.212 | 0.074 | 0.0065 | 0.153 | - | 70.8582 | 57.368 |
MW097 | bdl | 25 | 0.8 | 7 | 10.6 | 1.86 | 32 | 7.9 | 86 | 28 | 111 | 21 | 189 | 34 | 554.222 | 0.17 | 0.0045 | 0.307 | - | 19.3562 | 16.344 |
MW098 | bdl | 3 | 0.025 | 0.3 | 1.1 | 0.36 | 6 | 1.7 | 21 | 8 | 34 | 7 | 70 | 13 | 165.785 | 0.086 | 0.0014 | 0.427 | - | 71.6482 | 58.414 |
MW099 | bdl | 24 | 0.1 | 0.7 | 3.7 | 0.28 | 18 | 6.5 | 75 | 31 | 125 | 28 | 251 | 44 | 605.588 | 0.073 | 0.0044 | 0.102 | - | 71.2495 | 62.405 |
MW100 | bdl | 7 | 0.039 | 0.3 | 0.6 | 0.24 | 2 | 0.6 | 11 | 4 | 19 | 5 | 49 | 10 | 107.554 | 0.042 | 0.0013 | 0.651 | - | 97.6877 | 75.877 |
MW101 | bdl | 7 | 0.1 | 0.7 | 1.7 | 0.62 | 6 | 2 | 21 | 8 | 31 | 7 | 72 | 13 | 169.27 | 0.089 | 0.0014 | 0.583 | - | 47.7655 | 39.834 |
MW102 | bdl | 17 | 0.031 | 0.4 | 1.9 | 0.29 | 6 | 2.1 | 23 | 9 | 43 | 9 | 99 | 16 | 227.061 | 0.058 | 0.0016 | 0.272 | - | 52.1195 | 48.421 |
MW103 | bdl | 18 | 0.024 | 0.6 | 1.9 | 0.19 | 8 | 2.5 | 28 | 12 | 52 | 12 | 112 | 22 | 269.935 | 0.07 | 0.0027 | 0.151 | - | 69.9272 | 53.76 |
MW104 | bdl | 4 | 0.049 | 0.3 | 0.8 | 0.36 | 5 | 1.3 | 14 | 5 | 23 | 5 | 48 | 9 | 116.879 | 0.098 | 0.001 | 0.555 | - | 68.4259 | 53.051 |
MW105 | bdl | 49 | 0.2 | 2.5 | 6.6 | 1.27 | 19 | 5.8 | 58 | 20 | 80 | 16 | 156 | 26 | 439.665 | 0.123 | 0.0029 | 0.344 | - | 23.6093 | 21.658 |
MW106 | bdl | 18 | 0.1 | 0.7 | 2.6 | 0.48 | 9 | 3 | 35 | 12 | 54 | 12 | 106 | 19 | 271.97 | 0.088 | 0.002 | 0.3 | - | 44.6519 | 38.135 |
MW107 | bdl | 3 | 0.035 | 0.4 | 1.3 | 0.48 | 7 | 2.3 | 23 | 10 | 44 | 9 | 98 | 18 | 217.085 | 0.066 | 0.0019 | 0.507 | - | 85.5437 | 70.452 |
MW108 | bdl | 3 | 0.0039 | 0.1 | 0.5 | 0.11 | 6 | 2.4 | 34 | 14 | 64 | 16 | 150 | 24 | 313.8629 | 0.041 | 0.0021 | 0.205 | - | 308.493 | 293.379 |
MW109 | bdl | 29 | 0.1 | 0.7 | 2.5 | 0.24 | 18 | 6.3 | 89 | 35 | 161 | 37 | 345 | 60 | 781.979 | 0.051 | 0.0062 | 0.11 | - | 142.051 | 125.85 |
MW110 | bdl | 22 | 0.2 | 2.2 | 3.2 | 1.2 | 17 | 3.8 | 42 | 16 | 68 | 16 | 144 | 27 | 362.808 | 0.116 | 0.0032 | 0.499 | - | 50.5069 | 40.771 |
MW111 | bdl | 27 | 0.037 | 0.8 | 2.6 | 1.03 | 16 | 3.7 | 45 | 15 | 68 | 15 | 151 | 28 | 374.017 | 0.106 | 0.0031 | 0.486 | - | 65.7375 | 53.665 |
MW112 | bdl | 6 | 0.014 | 0.4 | 0.8 | 0.46 | 6 | 2.1 | 24 | 9 | 43 | 10 | 93 | 19 | 213.594 | 0.064 | 0.0019 | 0.652 | - | 144.547 | 111.266 |
MW113 | bdl | 4 | 0.037 | 0.7 | 1.3 | 0.94 | 6 | 2.1 | 24 | 9 | 42 | 9 | 95 | 19 | 213.517 | 0.066 | 0.0027 | 1.005 | - | 88.6116 | 67.697 |
MW114 | bdl | 43 | 0.4 | 3.4 | 5.5 | 0.92 | 32 | 11.1 | 131 | 54 | 228 | 49 | 436 | 79 | 1073.568 | 0.074 | 0.0078 | 0.21 | - | 86.1966 | 72.872 |
MW115 | 0.01 | 3 | bdl | bld | 0.3 | 0.22 | 3 | 1.8 | 27 | 14 | 79 | 20 | 224 | 46 | 417.615 | 0.012 | 0.0044 | 0.8 | - | 1052.85 | 791.973 |
Spot/Grain Number | 207Pb/206Pb | 2 s % | 207Pb/235U | 2 s % | 206Pb/238U | 2 s % | 207Pb/206Pb Age | 2 s. Abs. | 207Pb/235U Age | 2 s. Abs. | 206Pb/238U Age | 2 s. Abs. | % of Age Discordance |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MW001 | 0.05898 | 1.0559297 | 0.8097 | 2.2135129 | 0.0994 | 1.9454181 | 568 | 6 | 602 | 13 | 611 | 12 | 7.57 |
MW002 | 0.18773 | 1.0258972 | 12.658 | 1.9851962 | 0.4885 | 1.6995702 | 2722 | 17 | 2654 | 53 | 2564 | 44 | −5.81 |
MW003 | 0.12681 | 1.096377 | 6.45 | 2.1813458 | 0.3707 | 1.8857961 | 2054 | 19 | 2039 | 44 | 2033 | 38 | −1.02 |
MW004 | 0.12885 | 1.0171991 | 6.573 | 2.0606938 | 0.3716 | 1.7921398 | 2082 | 18 | 2056 | 42 | 2037 | 37 | −2.16 |
MW005 | 0.12828 | 1.0159463 | 6.525 | 2.0605022 | 0.3711 | 1.7926301 | 2075 | 18 | 2049 | 42 | 2035 | 36 | −1.93 |
MW006 | 0.10719 | 1.0227616 | 2.728 | 2.3930905 | 0.1854 | 2.1635251 | 1752 | 19 | 1336 | 32 | 1096 | 24 | −37.44 |
MW007 | 0.17303 | 1.0332651 | 9.676 | 2.0501816 | 0.4086 | 1.7707647 | 2587 | 17 | 2404 | 49 | 2210 | 39 | −14.57 |
MW008 | 0.17358 | 1.0095133 | 10.676 | 2.0531525 | 0.4513 | 1.787825 | 2593 | 17 | 2495 | 51 | 2401 | 43 | −7.41 |
MW009 | 0.12967 | 1.0230479 | 6.159 | 2.1094446 | 0.3485 | 1.8447574 | 2094 | 18 | 1998 | 42 | 1927 | 36 | −7.97 |
MW010 | 0.12733 | 1.0238928 | 5.678 | 2.0718654 | 0.3264 | 1.8011856 | 2062 | 18 | 1928 | 40 | 1821 | 33 | −11.69 |
MW011 | 0.12849 | 1.0202675 | 6.231 | 2.1145741 | 0.3537 | 1.8521549 | 2077 | 18 | 2009 | 42 | 1952 | 36 | −6.02 |
MW012 | 0.20117 | 1.0215618 | 14.87 | 2.0797817 | 0.5414 | 1.8116025 | 2836 | 17 | 2807 | 58 | 2789 | 51 | −1.66 |
MW013 | 0.1973 | 1.1449174 | 12.84 | 3.0424281 | 0.474 | 2.8187822 | 2803 | 19 | 2664 | 81 | 2500 | 70 | −10.81 |
MW014 | 0.12947 | 1.0400339 | 6.085 | 2.1790844 | 0.3422 | 1.914873 | 2091 | 18 | 1988 | 43 | 1900 | 36 | −9.13 |
MW015 | 0.12915 | 1.018563 | 6.14 | 2.5696011 | 0.3461 | 2.3591056 | 2087 | 18 | 1995 | 51 | 1915 | 45 | −8.24 |
MW016 | 0.19232 | 1.0214002 | 12.96 | 2.4406119 | 0.4889 | 2.2166028 | 2762 | 17 | 2676 | 65 | 2570 | 57 | −6.95 |
MW017 | 0.12961 | 1.0420935 | 6.387 | 2.1452971 | 0.3579 | 1.8751909 | 2093 | 18 | 2030 | 44 | 1972 | 37 | −5.78 |
MW018 | 0.12725 | 1.0311348 | 5.672 | 2.1894708 | 0.3235 | 1.9314615 | 2060 | 18 | 1927 | 42 | 1807 | 35 | −12.38 |
MW019 | 0.1694 | 1.0377757 | 10.174 | 2.1352802 | 0.4373 | 1.8661305 | 2552 | 17 | 2451 | 52 | 2338 | 44 | −8.39 |
MW020 | 0,1952 | 1.0228859 | 13.58 | 2.0498205 | 0.5054 | 1.7763638 | 2787 | 17 | 2721 | 56 | 2637 | 47 | −5.38 |
MW021 | 0.12872 | 1.0426656 | 6.031 | 2.0164531 | 0.3399 | 1.7259581 | 2080 | 18 | 1980 | 40 | 1886 | 33 | −9.33 |
MW022 | 0.05992 | 1.1259031 | 0.7865 | 2.0793247 | 0.09514 | 1.7481228 | 602 | 24 | 589 | 12 | 586 | 10 | −3.32 |
MW023 | 0.10314 | 1.1199047 | 1.96 | 2.3889438 | 0.1381 | 2.1101815 | 1681 | 21 | 1101 | 26 | 834 | 18 | −50.39 |
MW024 | 0.10827 | 1.0598033 | 2.942 | 2.1245751 | 0.1975 | 1.841368 | 1771 | 19 | 1393 | 30 | 1162 | 21 | −34.39 |
MW025 | 0.1294 | 1.0537672 | 6.685 | 2.066182 | 0.3748 | 1.7772684 | 2090 | 19 | 2071 | 43 | 2054 | 37 | −1.72 |
MW026 | 0,16279 | 1.0790615 | 9.917 | 2.0173669 | 0.4424 | 1.704522 | 2486 | 18 | 2427 | 49 | 2363 | 40 | −4.95 |
MW027 | 0.12683 | 1.0416841 | 5.461 | 2.3922151 | 0.3122 | 2.1535058 | 2055 | 18 | 1894 | 45 | 1751 | 38 | −14.79 |
MW028 | 0.12969 | 1.0584876 | 6.208 | 1.9730388 | 0.3471 | 1.6650784 | 2094 | 19 | 2006 | 40 | 1921 | 32 | −8.26 |
MW029 | 0.13105 | 1.0312174 | 6.577 | 2.1198996 | 0.3644 | 1.8521784 | 2112 | 18 | 2056 | 44 | 2003 | 37 | −5.16 |
MW030 | 0.13119 | 1.0523462 | 6.671 | 2.0503635 | 0.3686 | 1.759704 | 2114 | 18 | 2069 | 42 | 2023 | 36 | −4.31 |
MW031 | 0.12494 | 1.0214233 | 4.994 | 2.129226 | 0.2903 | 1.8682339 | 2028 | 18 | 1818 | 39 | 1643 | 31 | −18.98 |
MW032 | 0.20088 | 1.0763834 | 13.942 | 2.0184594 | 0.5031 | 1.7075061 | 2833 | 18 | 2746 | 55 | 2627 | 45 | −7.27 |
MW033 | 0.12819 | 1.0499029 | 5.576 | 2.1349278 | 0.317 | 1.8589299 | 2073 | 18 | 1913 | 41 | 1775 | 33 | −14.38 |
MW034 | 0,1914 | 1.1802872 | 10.55 | 2.0383995 | 0.4005 | 1.661925 | 2754 | 19 | 2485 | 51 | 2171 | 36 | −21.17 |
MW035 | 0.12953 | 1.0561198 | 6.958 | 2.0058773 | 0.3898 | 1.7053312 | 2092 | 19 | 2106 | 42 | 2122 | 36 | 1.34 |
MW036 | 0.13349 | 1.0652415 | 6,751 | 2.1104932 | 0.3672 | 1.8219336 | 2144 | 19 | 2079 | 44 | 2016 | 37 | −5.97 |
MW037 | 0.13003 | 1.0769987 | 6.395 | 2.0082954 | 0.3573 | 1.6950883 | 2098 | 19 | 2032 | 41 | 1969 | 33 | −6.15 |
MW038 | 0.13165 | 1.0592867 | 6.573 | 2.1741149 | 0.362 | 1.8986014 | 2120 | 19 | 2056 | 45 | 1992 | 38 | −6.04 |
MW039 | 0.1987 | 1.0490603 | 12.729 | 2,144,827 | 0.4642 | 1.8707633 | 2816 | 17 | 2660 | 57 | 2458 | 46 | −12.71 |
MW040 | 0.1299 | 1.0419095 | 6.519 | 2.0785535 | 0.3652 | 1.7985575 | 2097 | 18 | 2048 | 43 | 2006 | 36 | −4.34 |
MW041 | 0.19553 | 1.0416243 | 13.65 | 2.022665 | 0.509 | 1.7338375 | 2789 | 17 | 2726 | 55 | 2652 | 46 | −4.91 |
MW042 | 0.12926 | 1.0283564 | 6.244 | 2.24707 | 0.351 | 1.9979506 | 2088 | 18 | 2010 | 45 | 1939 | 39 | −7.14 |
MW043 | 0.13249 | 1.058558 | 6.603 | 2.2262665 | 0.363 | 1.9584988 | 2131 | 19 | 2060 | 46 | 1996 | 39 | −6.34 |
MW044 | 0.13109 | 1.041167 | 6.271 | 2.1850543 | 0.348 | 1.9210501 | 2113 | 18 | 2014 | 44 | 1925 | 37 | −8.90 |
MW045 | 0.1299 | 1.0298956 | 6.432 | 2.087899 | 0.3607 | 1.816215 | 2097 | 18 | 2037 | 43 | 1985 | 36 | −5.34 |
MW046 | 0.13272 | 1.0444299 | 6.803 | 2.1382101 | 0.3751 | 1.8657729 | 2134 | 18 | 2086 | 45 | 2053 | 38 | −3.80 |
MW047 | 0.12917 | 1.0641406 | 6.633 | 2.0708768 | 0.3756 | 1.7765515 | 2087 | 19 | 2064 | 43 | 2056 | 37 | −1.49 |
MW048 | 0.15565 | 1.0483819 | 8.07 | 2.2663001 | 0.3785 | 2.0092316 | 2409 | 18 | 2238 | 51 | 2069 | 42 | −14.11 |
MW049 | 0.12891 | 1.0382624 | 6.724 | 2.0252126 | 0.3819 | 1.7388207 | 2083 | 18 | 2076 | 42 | 2085 | 36 | 0.10 |
MW050 | 0.19019 | 1.0264121 | 12.5 | 2.1569862 | 0.4807 | 1.8971209 | 2744 | 17 | 2642 | 57 | 2530 | 48 | −7.80 |
MW051 | 0.12922 | 1.0961129 | 6.2 | 2.0578893 | 0.3488 | 1.7416788 | 2087 | 19 | 2004 | 41 | 1929 | 34 | −7.57 |
MW052 | 0.05891 | 1.1899966 | 0.762 | 2.1652317 | 0.0948 | 1.8089048 | 565 | 26 | 575 | 12 | 584 | 11 | 3.36 |
MW053 | 0.12455 | 1.0249582 | 5.296 | 2.2430844 | 0.3104 | 1.9952164 | 2022 | 18 | 1868 | 42 | 1742 | 35 | −13.84 |
MW054 | 0.21068 | 1.0679921 | 13.39 | 2.3038529 | 0.4654 | 2.0413552 | 2911 | 17 | 2709 | 62 | 2463 | 50 | −15.39 |
MW055 | 0.20151 | 1.0433869 | 13.63 | 2.3187192 | 0.4945 | 2.070701 | 2838 | 17 | 2726 | 63 | 2590 | 54 | −8.74 |
MW056 | 0.10087 | 1.0721416 | 2.283 | 2.2745103 | 0.1653 | 2.0059685 | 1640 | 20 | 1207 | 27 | 986 | 20 | −39.88 |
MW057 | 0.12904 | 1.066943 | 6.496 | 2.0585324 | 0.3677 | 1.7604511 | 2085 | 19 | 2045 | 42 | 2018 | 36 | −3.21 |
MW058 | 0.05871 | 1.0739985 | 0.7891 | 2.1348847 | 0.09795 | 1.8450636 | 556 | 23 | 591 | 13 | 602 | 11 | 8.27 |
MW059 | 0.12714 | 1.0393148 | 6.028 | 2.2327585 | 0.3449 | 1.9761161 | 2059 | 18 | 1979 | 44 | 1910 | 38 | −7.24 |
MW060 | 0.12964 | 1.0511704 | 6.281 | 2.2103342 | 0.353 | 1.9443812 | 2093 | 18 | 2016 | 45 | 1948 | 38 | −6.92 |
MW061 | 0.17004 | 1.0344256 | 11.002 | 2.1131229 | 0.4705 | 1.842621 | 2558 | 17 | 2524 | 53 | 2485 | 46 | −2.85 |
MW062 | 0.13171 | 1.0256123 | 6.816 | 2.1905211 | 0.3764 | 1.9355883 | 2121 | 18 | 2087 | 46 | 2059 | 40 | −2.92 |
MW063 | 0.13171 | 1.0567551 | 6.196 | 2.3090997 | 0.342 | 2.0530977 | 2121 | 19 | 2003 | 46 | 1896 | 39 | −10.61 |
MW064 | 0.13266 | 1.1070358 | 6.376 | 2.2014806 | 0.3495 | 1.9028895 | 2133 | 19 | 2029 | 45 | 1932 | 37 | −9.42 |
MW065 | 0.05927 | 1.2354517 | 0.7635 | 2.1669145 | 0.09353 | 1.7802184 | 579 | 27 | 576 | 12 | 576 | 10 | −0.52 |
MW066 | 0.13113 | 1.0258365 | 6.426 | 2.0775316 | 0.3576 | 1.8065982 | 2113 | 18 | 2037 | 42 | 1971 | 36 | −6.72 |
MW067 | 0.18913 | 1.1029476 | 10.947 | 2.2642112 | 0.4217 | 1.9774122 | 2734 | 18 | 2518 | 57 | 2268 | 45 | −17.04 |
MW068 | 0.12784 | 1.0388935 | 6.549 | 2.1619099 | 0.3736 | 1.8959311 | 2068 | 18 | 2052 | 44 | 2046 | 39 | −1.06 |
MW069 | 0.12983 | 1.0377318 | 6.531 | 2.1316465 | 0.3675 | 1.8619961 | 2097 | 18 | 2050 | 44 | 2017 | 38 | −3.81 |
MW070 | 0.12849 | 1.0428153 | 6.57 | 1.9981856 | 0.3744 | 1.7044887 | 2077 | 18 | 2055 | 41 | 2050 | 35 | −1.30 |
MW071 | 0.19883 | 1.0997584 | 11.387 | 2.1970896 | 0.4181 | 1.9020342 | 2816 | 18 | 2555 | 56 | 2251 | 43 | −20.07 |
MW072 | 0.19584 | 1.074518 | 12.611 | 2.1231418 | 0.4716 | 1.8311587 | 2792 | 18 | 2651 | 56 | 2490 | 46 | −10.82 |
MW073 | 0.12709 | 1.0507496 | 5.729 | 2.2149697 | 0.332 | 1.949876 | 2058 | 19 | 1935 | 43 | 1848 | 36 | −10.21 |
MW074 | 0.12982 | 1.024647 | 6.129 | 2.1942416 | 0.3462 | 1.9403079 | 2096 | 18 | 1994 | 44 | 1916 | 37 | −8.59 |
MW075 | 0.12819 | 1.0326037 | 5.779 | 2.225006 | 0,3302 | 1.9708834 | 2073 | 18 | 1943 | 43 | 1839 | 36 | −11.29 |
MW076 | 0.2085 | 1.3210992 | 12.02 | 2.9420867 | 0,4219 | 2.6287966 | 2893 | 21 | 2606 | 77 | 2269 | 60 | −21.57 |
MW077 | 0.13258 | 1.0467253 | 6.831 | 2.3109462 | 0,3775 | 2.0603006 | 2132 | 18 | 2089 | 48 | 2064 | 43 | −3.19 |
MW078 | 0.12706 | 1.0393634 | 6.2 | 2.2252813 | 0,358 | 1.9676384 | 2058 | 18 | 2004 | 45 | 1972 | 39 | −4.18 |
MW079 | 0.13043 | 1.0505673 | 6.53 | 2.3194624 | 0,3664 | 2.067901 | 2105 | 18 | 2049 | 48 | 2012 | 42 | −4.42 |
MW080 | 0.212 | 1.3118297 | 11.82 | 3.4037478 | 0,407 | 3.1407964 | 2920 | 21 | 2589 | 88 | 2200 | 69 | −24.66 |
MW081 | 0.16841 | 1.0431425 | 9.35 | 2.5602847 | 0,4047 | 2.3381427 | 2542 | 17 | 2372 | 61 | 2190 | 51 | −13.85 |
MW082 | 0.13304 | 1.1032586 | 6.43 | 2.2902349 | 0.3549 | 2.0069868 | 2139 | 19 | 2036 | 47 | 1958 | 39 | −8.46 |
MW083 | 0.06028 | 1.0763443 | 0.7995 | 2.3507088 | 0.0967 | 2.0898121 | 614 | 23 | 596 | 14 | 595 | 12 | −3.09 |
MW084 | 0.18666 | 1.0410054 | 10 | 2.6694281 | 0.3912 | 2.4580794 | 2713 | 17 | 2433 | 65 | 2127 | 52 | −21.60 |
MW085 | 0.12958 | 1.0488629 | 6.728 | 2.3527961 | 0.3797 | 2.1060713 | 2092 | 18 | 2078 | 49 | 2074 | 44 | −0.86 |
MW086 | 0.12773 | 1.0309047 | 5.872 | 2.3127691 | 0.3349 | 2.0702986 | 2067 | 18 | 1956 | 45 | 1862 | 39 | −9.92 |
MW087 | 0.12985 | 1.051009 | 6.684 | 2.2446378 | 0.3754 | 1.9833756 | 2096 | 18 | 2070 | 46 | 2055 | 41 | −1.95 |
MW088 | 0.12813 | 1.0475964 | 6.556 | 2.399084 | 0.3728 | 2.1582739 | 2072 | 18 | 2052 | 49 | 2042 | 44 | −1.44 |
MW089 | 0.12837 | 1.0649181 | 5.639 | 2.5845292 | 0.3183 | 2.3549397 | 2076 | 19 | 1921 | 50 | 1781 | 42 | −14.21 |
MW090 | 0.23299 | 1.0274848 | 18.3 | 2.460428 | 0.57 | 2.2356165 | 3073 | 16 | 3004 | 74 | 2907 | 65 | −5.40 |
MW091 | 0.13246 | 1.0715605 | 6.767 | 2.307766 | 0.3697 | 2.0435769 | 2131 | 19 | 2081 | 48 | 2031 | 42 | −4.69 |
MW092 | 0.12723 | 1.0744489 | 5.612 | 2.3350095 | 0.3186 | 2.0731206 | 2060 | 19 | 1919 | 45 | 1782 | 37 | −13.50 |
MW093 | 0.2099 | 1.1289986 | 14.27 | 2.4068045 | 0.4931 | 2.1255752 | 2904 | 18 | 2767 | 67 | 2583 | 55 | −11.05 |
MW094 | 0.13098 | 1.075925 | 6.128 | 2.4087246 | 0.3394 | 2.155073 | 2111 | 19 | 1994 | 48 | 1883 | 41 | −10.80 |
MW095 | 0.13068 | 1.094069 | 6.17 | 2.3231052 | 0.3436 | 2.0493489 | 2107 | 19 | 2000 | 46 | 1904 | 39 | −9.64 |
MW096 | 0.1451 | 1.8162735 | 6.38 | 3.338447 | 0.3175 | 2.8011388 | 2288 | 31 | 2030 | 68 | 1777 | 50 | −22.33 |
MW097 | 0.16682 | 1.0422462 | 10.421 | 2.085877 | 0.4527 | 1.806822 | 2526 | 17 | 2473 | 52 | 2407 | 43 | −4.71 |
MW098 | 0.19947 | 1.0991481 | 12.98 | 2.27661 | 0.4708 | 1.9936967 | 2822 | 18 | 2678 | 61 | 2487 | 50 | −11.87 |
MW099 | 0.13511 | 1.1621508 | 6.741 | 2.2536652 | 0.3608 | 1.9309097 | 2165 | 20 | 2079 | 47 | 1986 | 38 | −8.27 |
MW100 | 0.2042 | 1.5807864 | 14.53 | 3.5242336 | 0.516 | 3.1498153 | 2859 | 26 | 2783 | 98 | 2680 | 84 | −6.26 |
MW101 | 0.19786 | 1.049468 | 12.52 | 2.1522679 | 0.4567 | 1.8790621 | 2809 | 17 | 2644 | 57 | 2425 | 46 | −13.67 |
MW102 | 0.12944 | 1.0537348 | 6.327 | 2.096248 | 0.3526 | 1.8121531 | 2090 | 19 | 2022 | 42 | 1947 | 35 | −6.84 |
MW103 | 0.12946 | 1.0561789 | 6.687 | 2.0679553 | 0.3741 | 1.7778992 | 2091 | 19 | 2071 | 43 | 2049 | 36 | −2.01 |
MW104 | 0.18647 | 1.0839618 | 10.367 | 2.1415732 | 0.401 | 1.8469875 | 2711 | 18 | 2468 | 53 | 2173 | 40 | −19.85 |
MW105 | 0.13103 | 1.0905219 | 6.291 | 2.1442284 | 0.3474 | 1.8462062 | 2112 | 19 | 2018 | 43 | 1922 | 35 | −8.99 |
MW106 | 0.12864 | 1.0620115 | 5.895 | 1.9959839 | 0.3308 | 1.6899951 | 2079 | 19 | 1960 | 39 | 1842 | 31 | −11.40 |
MW107 | 0.1957 | 1.1730277 | 12.388 | 2.1421758 | 0.4579 | 1.7924629 | 2791 | 19 | 2634 | 56 | 2433 | 44 | −12.83 |
MW108 | 0.18535 | 1.0207998 | 12.651 | 2.0261364 | 0.4934 | 1.7501991 | 2702 | 17 | 2655 | 54 | 2585 | 45 | −4.33 |
MW109 | 0.13297 | 1.0683607 | 6.661 | 2.0837709 | 0.3623 | 1.7890519 | 2137 | 19 | 2068 | 43 | 1993 | 36 | −6.74 |
MW110 | 0.2353 | 1.0816384 | 18.51 | 2.0484036 | 0.5713 | 1.7395447 | 3088 | 17 | 3017 | 62 | 2913 | 51 | −5.67 |
MW111 | 0.20941 | 1.0402371 | 10.59 | 2.3474282 | 0.3658 | 2.1043588 | 2901 | 17 | 2487 | 58 | 2009 | 42 | −30.75 |
MW112 | 0.16789 | 1.0308161 | 9.68 | 2.1739041 | 0.4189 | 1.913969 | 2537 | 17 | 2406 | 52 | 2255 | 43 | −11.12 |
MW113 | 0.22314 | 1.0480508 | 17.66 | 2.0670773 | 0.5741 | 1.7816841 | 3003 | 17 | 2971 | 61 | 2927 | 52 | −2.53 |
MW114 | 0.13297 | 1.0533261 | 6.694 | 2.0342353 | 0.3652 | 1.7402924 | 2137 | 18 | 2072 | 42 | 2007 | 35 | −6.08 |
MW115 | 0.06006 | 1.1923323 | 0.7893 | 2.0599996 | 0.09574 | 1.6798637 | 607 | 26 | 591 | 1 | 589 | 10 | −2.96 |
PAGn | NWD-Zircon | ABGn | MWD-Zircon | ABGn | MWD-Zircon | M-D | NWD-Zircon |
---|---|---|---|---|---|---|---|
Age (Ma) | Age (Ma) | Age (Ma) | Age (Ma) | Age (Ma) | Age (Ma) | Age (Ma) | Age (Ma) |
1813.7 ± 3.4 | 1887.6 ± 2.1 | 1886 ± 30 | 768.7 ± 4.1 | 614.3 ± 5.8 | 611 ± 12 | ||
1711.7 ± 3.4 | 1955.6 ± 2.6 | 1958 ± 39 | 877.5 ± 3.3 | 622.3 ± 3.0 | |||
1685.0 ± 4.0 | 1643 ± 31 | 1963.8 ± 2.5 | 879.6 ± 2.9 | 626.6 ± 4.6 | |||
2453.4± 4.3 | 1983.7 ± 1.7 | 721.3 ± 3.3 | 582.1 ± 7.8 | ||||
2512.3 ± 3.4 | 1988.0 ± 1.9 | 1986 ± 38 | 811.9 ± 3.0 | 584.2 ± 7.6 | 584 ± 11 | ||
2478.2± 3.3 | 2463 ± 50 | 2005.5± 1.8 | 2007 ± 35 | 845.0 ± 3.4 | 619.0 ± 5.4 | ||
2430.7± 3.4 | 2022.8 ± 2.1 | 740.4 ± 6.5 | 633.2 ± 3.9 | ||||
2504.3± 3.7 | 2500 ± 70 | 2099.3 ± 0.9 | 859.2 ± 4.0 | 620.7 ± 4.8 | |||
2602.6 ± 13.5 | 2153.7± 1.4 | 887.1 ± 6.6 | 627.1 ± 8.1 | ||||
2170.0± 4.0 | 2171 ± 36 | 2269.0± 2.5 | 753.5 ± 4.3 | ||||
2274.5 ± 3.3 | 2269 ± 60 | 2319.7± 1.7 | 814.4 ± 6.2 | ||||
2387.8 ± 4.6 | 2339.4 ± 2.6 | 2338 ± 44 | 889.4 ± 2.3 | ||||
2398.2± 4.1 | 675.1 ± 7.0 | ||||||
2514.0 ± 3.5 | 829.1 ± 6.2 | 834 ± 18 | |||||
2578.2 ± 4.0 | 2583 ± 55 |
Locality and Author (s) | Method | Rock Type | Age (Ma) | Age of MWD-Zircon (Ma) |
---|---|---|---|---|
Sangmelima [68] | Rb–Sr biotite dating | Granodiorite | 1997 ± 19 | 1996 ± 39,1993 ± 36, 1992 ± 38 |
Charnockite | 2064 ± 20, 2299 ± 22 | 2059 ± 40, 2255 ± 43, 2269 ± 60 | ||
Sangmelima [62] | Pb-evaporation zircon dating | Charnockites | 2792 ± 4 2689 ± 20 2671 ± 25 | 2789 ± 51 2680 ± 84 2637 ± 47 |
Granodiorites | 2686 ± 31 2674 ± 21 2920 ± 7 2933 ± 13 2939 ± 13 2962 ± 11 | 2627 ± 45 2927 ± 52 2913 ± 51 2907 ± 65 | ||
Tonalites | 2678 ± 17 | 2680 ± 84 | ||
Sangmelima [69] | Pb-evaporation zircon dating | High-K granites | 2175 ± 11 2218.4 ± 4.0 2302.3 ± 1.7 2345.5 ± 5.1 2386 ± 2.7 2403.2 ± 8.2 2424.4 ± 2.9 2427.9 ± 8.7 2428.2 ± 3.1 2435.4 ± 5.2 2481.6 ± 3.2 2487.4 ± 3.7 2496.1 ± 2.3 2506.5 ± 4.2 2509 ± 3.2 2512.0 ± 7.9 2565.8 ± 7.4 2565 ± 19 2591.6 ± 4.3 2598.3 ± 8.0 2600.9 ± 3.2 2614.5 ± 4.9 2622 ± 14 2631.9 ± 3.9 2657.7 ± 2.7 2682.6 ± 1.8 2684.6 ± 6.8 2688.8 ± 2.7 2719.4 ± 3.4 2721.2 ± 1.5 2720.6 ± 3.2 2788 ± 35 | 2122 ± 36 2125 ± 52 2171 ± 36 2173 ± 40 2200 ± 69 2210 ± 39 2190 ± 51 2255 ± 43 2338 ± 40 2363 ± 40 2401 ± 43 2407 ± 43 2425 ± 46 2433 ± 44 2458 ± 46 2463 ± 50 2485 ± 46 2487 ± 50 2500 ± 70 2530 ± 48 2564 ± 44 2570 ± 57 2590 ± 54 2583 ± 55 2585 ± 45 2680 ± 84 2637 ± 47 2627 ± 45 2789 ± 51 |
Ebolawa [81] | U–Pb zircon dating Rb/Sr isochrons | Charnockites | 2896 ± 7 2882 ± 70 | 2913 ± 51, 2907 ± 65 |
Northern border of the Congo Craton [82] | Pb-evaporation zircon dating | Charnockites | 2912 ± 25 | 2907 ± 65 |
Tonalite | 2833 ± 15 | |||
South Region of Cameroon [79] | Rb/Sr isochrons | Granodiorites | 2880 ± 70 | 2913 ± 51, 2907 ± 65 |
South Region of Cameroon [81,83] | Sm–Nd whole rocks isochron | Meta-doleritedikes | 2059 ± 16 | 2059 ± 40, 2053 ± 38 |
Doum–Lolodorf and Mengueme [84] | Pb-evaporation zircon dating | Two pyroxene syenite | 2321 ± 1 | 2269 ± 60 |
Clinopyroxene syenite | 2349 ± 1, 2667 ± 1 | 2637 ± 47 | ||
Yobé –Cameroon [85] | Rb/Sr isochrons | Granites | 1167 ± 61 | 1162 ± 21, 1096 ± 24 |
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Kanouo, N.S.; Ngueutchoua, G.; Kouske, A.P.; Yongue, R.F.; Venkatesh, A.S. Trace Element and U–Pb Core Age for Zircons from Western Meiganga Gold Placer, Cameroon: Their Genesis and Archean-Proterozoic Sources. Minerals 2018, 8, 194. https://doi.org/10.3390/min8050194
Kanouo NS, Ngueutchoua G, Kouske AP, Yongue RF, Venkatesh AS. Trace Element and U–Pb Core Age for Zircons from Western Meiganga Gold Placer, Cameroon: Their Genesis and Archean-Proterozoic Sources. Minerals. 2018; 8(5):194. https://doi.org/10.3390/min8050194
Chicago/Turabian StyleKanouo, Nguo Sylvestre, Gabriel Ngueutchoua, Arnaud Patrice Kouske, Rose Fouateu Yongue, and Akella Satya Venkatesh. 2018. "Trace Element and U–Pb Core Age for Zircons from Western Meiganga Gold Placer, Cameroon: Their Genesis and Archean-Proterozoic Sources" Minerals 8, no. 5: 194. https://doi.org/10.3390/min8050194