Energy Drive for the Kiruna Mining District Mineral System(s): Insights from U-Pb Zircon Geochronology
Abstract
:1. Introduction
2. Geological Setting
2.1. Regional Geologic Setting
2.1.1. Extension and Early Orogenic Crustal Shortening
2.1.2. Late Orogenic Crustal Shortening
2.2. Local Geology
2.2.1. Stratigraphy and Local Intrusive Rocks
2.2.2. Ore Deposits and Alteration
3. Materials and Methods
3.1. Geologic Sampling
3.2. Lithogeochemistry
3.3. U-Pb Zircon Geochronology
4. Results
4.1. Sample Descriptions
4.1.1. Kalixforsbron Area—Samples 005, 008
4.1.2. Saarijärvi Area—Samples 017, 025, 065, 097
4.1.3. Pahtohavare Area—Sample 098
4.2. Lithogeochemistry
4.3. U-Pb Zircon Geochronology
4.3.1. Kalixforsbron Area—Samples 005, 008
4.3.2. Saarijärvi Area—Samples 017, 025, 065, 097
4.3.3. Pahtohavare Area—Sample 098
5. Discussion
5.1. Early Igneous Activity
5.2. Timing of the Magnetite–Ilmenite Gabbro Intrusion and Possible Relation to IOA Deposits
5.3. Energy Drive Insights for the Mineral System
6. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample Name | Alias | Association | Relative Timing | Description | Location | SWEREF99 TM | Age (Ma, This Study) | |
---|---|---|---|---|---|---|---|---|
JBHA19005 | 005 | PMS | Early orogenic | Aplitic granite | Kalixforsbron | N 7523019 | E 719786 | Early orogenic |
JBHA19008 | 008 | PMS | Early orogenic | Magnetite–ilmenite gabbro | Kalixforsbron | N 7522725 | E 720539 | 1877 ± 10 |
JBHA19017 | 017 | PMS | Early orogenic | Granite | Saarijärvi | N 7527323 | E 711237 | 1887 ± 4 |
JBHA19025 | 025 | PMS | Early orogenic (Late orogenic in [24]) | Quartz syenite | Saarijärvi | N 7527359 | E 709173 | 1880 ± 7 |
LLPAH19065 (Drill hole PAH92002, 19 m) | 065 | PMS | Early orogenic | Granite | Saarijärvi | N 7528947 | E 711824 | 1880 ± 3 |
LLSAR19097 | 097 | Neoarchean | Archean | Granite | Saarijärvi | N 7526604 | E 709743 | 2698 ± 3 |
LLPAH19098 | 098 | Porphyrite group? | Early orogenic | Porphyritic quartz andesite | Pahtohavare | N 7527381 | E 713693 | 1911 ± 12 |
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Logan, L.; Andersson, J.B.H.; Whitehouse, M.J.; Martinsson, O.; Bauer, T.E. Energy Drive for the Kiruna Mining District Mineral System(s): Insights from U-Pb Zircon Geochronology. Minerals 2022, 12, 875. https://doi.org/10.3390/min12070875
Logan L, Andersson JBH, Whitehouse MJ, Martinsson O, Bauer TE. Energy Drive for the Kiruna Mining District Mineral System(s): Insights from U-Pb Zircon Geochronology. Minerals. 2022; 12(7):875. https://doi.org/10.3390/min12070875
Chicago/Turabian StyleLogan, Leslie, Joel B. H. Andersson, Martin J. Whitehouse, Olof Martinsson, and Tobias E. Bauer. 2022. "Energy Drive for the Kiruna Mining District Mineral System(s): Insights from U-Pb Zircon Geochronology" Minerals 12, no. 7: 875. https://doi.org/10.3390/min12070875