Sr-Nd-Pb-Ca Isotopes of Holocene Basalts from Jingpohu, NE China: Implications for the Origin of Their Enriched Mantle Signatures
Abstract
:1. Introduction
2. Geological Background
3. Analytical Method
3.1. Major and Trace Elements
3.2. Sr-Nd-Pb-Ca Isotopes
3.2.1. Chemical Separation
3.2.2. Mass Spectrometry
4. Results
4.1. Petrography
4.2. Whole-Rock Major Elements
4.3. Whole-Rock Trace Elements
4.4. Whole-Rock Sr-Nd-Pb-Ca Isotopes
5. Discussion
5.1. Crustal Assimilation and Fractional Crystallization
5.2. Differences between the CF and FP Lavas
5.3. Mantle Petrogenesis for the Sodic Lavas
5.4. Identifying the Origins of the Three Mantle Components
5.4.1. Origin of the DM Source
5.4.2. Origin of the EM I Component
5.4.3. Origin of EM II Endmembers
5.5. Geodynamic Implications by the Sodic Lavas
6. Conclusions
- (1)
- Jingpohu’s Holocene lavas are mainly restricted to the CF and FP volcanic areas. Both FP and CF lavas are otherwise coeval and retain such similar Sr-Nd-Pb-Ca isotopic characteristics, suggesting that they originated from the same sources and experienced similar petrogeneses. The more evolved FP phonotephrites exhibit lower MgO, CaO, and HREEs and higher Al2O3, Na2O, K2O, and LILEs than those of CF basanites and trachybasalts, which may be attributed to early and high P fractionation of clinopyroxene and anorthoclase, as well as different partial melting degrees of a garnet-bearing source.
- (2)
- By comparing the geochemical characteristics of Jingpohu lavas with other Cenozoic sodic and potassic lavas in NE China, we suggested that sodic lavas originate from three sources, DM, EM I, and EM II, which were derived from the upper asthenosphere, ancient (~2.2 Ga) sediments stored in the mantle transition zone and a locally metasomatized lithospheric mantle, respectively. Isotopic differences between Jingpohu, Changbaishan, and Longgang lavas may be attributed to different proportions of these enriched components during their petrogenesis.
- (3)
- Cenozoic volcanism in NE China was likely triggered by the westward subduction of the Pacific slab, inducing the upwelling and decompressional melting of a transitional mantle with ancient sediments. Even though we cannot completely exclude any material contributions from the Pacific slab, we do not think it is necessary to explain a varied petrogenesis of Cenozoic magmatism across NE China.
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Location | FP Volcanic Area | CF Volcanic Area | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Sample | WJ-1 | WJ-2 | WJ-3 | WJ-4 | WJ-5 | WJ-6 | WJ-7 | WJ-8 | WJ-9 | WJ-10 | WJ-11 |
(wt.%) | |||||||||||
SiO2 | 49.47 | 48.88 | 47.68 | 47.35 | 48.20 | 47.52 | 47.94 | 48.38 | 48.12 | 46.97 | 45.21 |
TiO2 | 1.82 | 1.81 | 1.85 | 1.92 | 1.85 | 1.91 | 1.92 | 1.91 | 1.70 | 1.75 | 1.82 |
Al2O3 | 16.83 | 16.73 | 16.93 | 17.02 | 16.85 | 17.26 | 17.00 | 17.01 | 15.18 | 15.13 | 14.62 |
Fe2O3(T) | 10.37 | 10.39 | 10.78 | 10.94 | 10.78 | 11.05 | 10.91 | 10.83 | 10.73 | 11.01 | 11.30 |
MnO | 0.14 | 0.14 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.16 | 0.17 | 0.18 |
MgO | 4.41 | 4.48 | 4.49 | 4.51 | 4.51 | 4.04 | 4.58 | 4.50 | 8.09 | 8.27 | 9.19 |
CaO | 5.57 | 5.63 | 5.72 | 5.73 | 5.94 | 5.53 | 5.82 | 5.78 | 7.89 | 8.04 | 8.39 |
Na2O | 6.08 | 6.06 | 5.94 | 6.03 | 6.28 | 6.62 | 6.18 | 6.15 | 4.89 | 5.02 | 5.21 |
K2O | 4.41 | 4.43 | 4.39 | 4.49 | 4.54 | 4.82 | 4.51 | 4.55 | 3.06 | 3.01 | 3.31 |
P2O5 | 0.98 | 0.99 | 1.06 | 1.03 | 1.03 | 1.10 | 1.02 | 1.01 | 0.85 | 0.88 | 1.01 |
LOI | −0.25 | −0.23 | 0.29 | 0.07 | −0.50 | −0.54 | −0.42 | −0.48 | −0.35 | −0.35 | −0.55 |
Total | 99.83 | 99.31 | 99.27 | 99.22 | 99.61 | 99.46 | 99.62 | 99.79 | 100.32 | 99.90 | 99.67 |
(ppm) | |||||||||||
Li | 12.2 | 12.1 | 10.9 | 10.7 | 11.9 | 11.5 | 11.3 | 11.9 | 12.4 | 11.4 | 11.3 |
Be | 4.17 | 4.14 | 4.37 | 4.09 | 4.25 | 4.25 | 4.13 | 4.06 | 2.93 | 3.13 | 3.10 |
Sc | 7.56 | 7.66 | 7.76 | 7.62 | 7.56 | 6.03 | 7.62 | 7.82 | 17.49 | 17.88 | 16.90 |
V | 96.5 | 98.3 | 95.5 | 101.7 | 100.2 | 90.4 | 101.5 | 102.4 | 153.8 | 160.5 | 161.2 |
Cr | 46.4 | 48.8 | 47.6 | 33.4 | 47.0 | 27.3 | 41.4 | 30.6 | 175.0 | 177.7 | 218.4 |
Co | 32.2 | 32.7 | 33.4 | 34.1 | 32.9 | 32.3 | 33.9 | 33.7 | 44.1 | 45.1 | 48.7 |
Ni | 50.6 | 52.9 | 52.9 | 46.5 | 46.3 | 37.2 | 49.5 | 44.7 | 151.5 | 156.5 | 200.0 |
Cu | 23.5 | 23.7 | 23.0 | 22.7 | 23.2 | 21.5 | 23.6 | 23.9 | 33.5 | 36.3 | 34.7 |
Zn | 126.2 | 125.2 | 132.9 | 131.2 | 128.2 | 134.8 | 131.0 | 126.8 | 105.0 | 104.8 | 109.1 |
Ga | 27.1 | 27.0 | 28.0 | 27.9 | 27.8 | 28.7 | 27.9 | 27.1 | 22.7 | 22.6 | 22.4 |
Rb | 90.8 | 90.6 | 88.2 | 87.1 | 85.8 | 86.5 | 86.4 | 87.1 | 63.0 | 59.9 | 58.3 |
Sr | 1061 | 1068 | 1113 | 1096 | 1098 | 1172 | 1097 | 1087 | 1008 | 1023 | 1121 |
Y | 21.2 | 21.0 | 21.3 | 21.0 | 21.5 | 20.5 | 21.1 | 20.7 | 26.4 | 25.8 | 26.8 |
Zr | 378 | 391 | 401 | 394 | 393 | 420 | 388 | 378 | 264 | 264 | 282 |
Nb | 103.1 | 102.9 | 108.8 | 108.2 | 106.3 | 116.0 | 107.0 | 103.4 | 79.3 | 82.1 | 92.5 |
Sn | 2.46 | 2.53 | 2.57 | 2.51 | 2.32 | 2.52 | 2.56 | 2.50 | 1.91 | 1.88 | 1.94 |
Cs | 1.20 | 1.17 | 1.20 | 1.14 | 1.16 | 1.22 | 1.14 | 1.17 | 0.94 | 0.91 | 0.93 |
Ba | 714 | 713 | 682 | 704 | 657 | 677 | 706 | 706 | 674 | 668 | 694 |
La | 65.6 | 65.3 | 67.4 | 65.7 | 65.4 | 68.5 | 65.2 | 64.1 | 57.4 | 58.3 | 67.7 |
Ce | 117 | 117 | 120 | 117 | 118 | 123 | 117 | 115 | 102 | 103 | 118 |
Pr | 13.0 | 12.9 | 13.4 | 13.1 | 13.0 | 13.6 | 13.1 | 12.6 | 11.3 | 11.5 | 13.1 |
Nd | 49.9 | 49.0 | 51.4 | 50.7 | 50.6 | 53.4 | 50.3 | 49.2 | 42.9 | 44.4 | 50.4 |
Sm | 9.47 | 9.44 | 9.81 | 9.21 | 9.54 | 10.12 | 9.28 | 9.28 | 8.25 | 8.24 | 9.71 |
Eu | 2.80 | 2.98 | 2.99 | 3.01 | 3.00 | 3.05 | 2.94 | 2.87 | 2.54 | 2.65 | 2.93 |
Gd | 7.79 | 7.42 | 7.76 | 7.91 | 7.61 | 7.89 | 7.65 | 7.39 | 7.30 | 7.25 | 8.08 |
Tb | 0.98 | 0.96 | 1.03 | 1.01 | 0.99 | 1.03 | 1.01 | 0.97 | 1.02 | 1.06 | 1.09 |
Dy | 4.96 | 4.95 | 5.02 | 4.85 | 4.79 | 5.13 | 4.97 | 5.01 | 5.41 | 5.54 | 6.09 |
Ho | 0.77 | 0.75 | 0.80 | 0.76 | 0.77 | 0.75 | 0.75 | 0.76 | 0.89 | 0.94 | 0.96 |
Er | 1.68 | 1.69 | 1.63 | 1.64 | 1.72 | 1.57 | 1.70 | 1.65 | 2.41 | 2.14 | 2.27 |
Tm | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.17 | 0.19 | 0.20 | 0.32 | 0.29 | 0.28 |
Yb | 1.21 | 1.19 | 1.11 | 1.10 | 1.10 | 0.96 | 1.08 | 1.10 | 1.90 | 1.81 | 1.77 |
Lu | 0.16 | 0.16 | 0.15 | 0.14 | 0.16 | 0.12 | 0.15 | 0.15 | 0.28 | 0.24 | 0.25 |
Hf | 8.35 | 8.43 | 8.51 | 8.38 | 8.65 | 8.87 | 8.45 | 8.20 | 5.76 | 5.55 | 6.22 |
Ta | 6.23 | 6.13 | 6.49 | 6.26 | 6.09 | 6.72 | 6.25 | 5.97 | 4.15 | 4.21 | 4.66 |
Tl | 0.19 | 0.22 | 0.20 | 0.14 | 0.17 | 0.18 | 0.17 | 0.20 | 0.17 | 0.14 | 0.08 |
Pb | 9.09 | 8.05 | 7.95 | 7.36 | 7.72 | 7.52 | 8.06 | 8.02 | 7.55 | 6.39 | 5.95 |
Th | 11.66 | 11.34 | 11.05 | 10.87 | 11.02 | 11.47 | 10.83 | 10.49 | 8.81 | 8.09 | 8.83 |
U | 2.78 | 2.79 | 2.75 | 2.64 | 2.71 | 2.77 | 2.64 | 2.60 | 2.22 | 1.91 | 2.15 |
Sample | Location | 87Sr/86Sr | 2σ | 143Nd/144Nd | 2σ | 208Pb/204Pb | 207Pb/204Pb | 206Pb/204Pb | δ44/42Ca (‰) | 2SD | δ44/40Ca (‰) | 2SD |
---|---|---|---|---|---|---|---|---|---|---|---|---|
WJ-1 | FP | 0.704403 | 0.000006 | 0.512720 | 0.000007 | 38.051 | 15.519 | 17.849 | 0.35 | 0.03 | 0.72 | 0.07 |
WJ-2 | FP | 0.704385 | 0.000012 | 0.512715 | 0.000005 | 38.011 | 15.514 | 17.793 | 0.36 | 0.03 | 0.74 | 0.06 |
WJ-3 | FP | 0.704311 | 0.000010 | 0.512730 | 0.000006 | 37.921 | 15.501 | 17.619 | 0.36 | 0.02 | 0.74 | 0.04 |
WJ-4 | FP | 0.704311 | 0.000009 | 0.512726 | 0.000006 | 37.907 | 15.500 | 17.603 | 0.36 | 0.04 | 0.73 | 0.09 |
WJ-5 | FP | 0.704301 | 0.000008 | 0.512737 | 0.000005 | 37.941 | 15.504 | 17.658 | 0.31 | 0.03 | 0.63 | 0.06 |
WJ-6 | FP | 0.704259 | 0.000008 | 0.512727 | 0.000008 | 37.849 | 15.491 | 17.487 | 0.31 | 0.03 | 0.63 | 0.05 |
WJ-7 | FP | 0.704311 | 0.000009 | 0.512715 | 0.000007 | 37.929 | 15.504 | 17.639 | 0.38 | 0.02 | 0.77 | 0.05 |
WJ-8 | FP | 0.704317 | 0.000010 | 0.512723 | 0.000006 | 37.976 | 15.509 | 17.721 | 0.34 | 0.04 | 0.70 | 0.08 |
WJ-9 | CF | 0.704171 | 0.000011 | 0.512808 | 0.000005 | 38.057 | 15.532 | 18.050 | 0.37 | 0.01 | 0.76 | 0.01 |
WJ-10 | CF | 0.704086 | 0.000009 | 0.512809 | 0.000009 | 37.962 | 15.515 | 17.880 | 0.38 | 0.04 | 0.77 | 0.09 |
WJ-11 | CF | 0.703933 | 0.000009 | 0.512831 | 0.000007 | 37.888 | 15.498 | 17.733 | 0.37 | 0.04 | 0.77 | 0.08 |
BCR-2 | 0.705000 | 0.000006 | 0.512644 | 0.000005 | 38.744 | 15.629 | 18.763 | 0.40 | 0.02 | |||
AGV-2 | 0.703960 | 0.000006 | 0.512796 | 0.000005 | 38.551 | 15.621 | 18.763 | |||||
BHVO-2 | 0.38 | 0.03 | ||||||||||
NIST SRM 915b | 0.37 | 0.03 | ||||||||||
Seawater | 0.94 | 0.04 |
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Wei, F.; Pan, B.; Xu, J. Sr-Nd-Pb-Ca Isotopes of Holocene Basalts from Jingpohu, NE China: Implications for the Origin of Their Enriched Mantle Signatures. Minerals 2021, 11, 790. https://doi.org/10.3390/min11080790
Wei F, Pan B, Xu J. Sr-Nd-Pb-Ca Isotopes of Holocene Basalts from Jingpohu, NE China: Implications for the Origin of Their Enriched Mantle Signatures. Minerals. 2021; 11(8):790. https://doi.org/10.3390/min11080790
Chicago/Turabian StyleWei, Feixiang, Bo Pan, and Jiandong Xu. 2021. "Sr-Nd-Pb-Ca Isotopes of Holocene Basalts from Jingpohu, NE China: Implications for the Origin of Their Enriched Mantle Signatures" Minerals 11, no. 8: 790. https://doi.org/10.3390/min11080790