Abstract
The Tayuan (Cu–Mo)–Pb–Zn deposit is located in the northern part of Daxinganling, NE China. Lenticular ore body occurs in the skarn zone. The skarn minerals mainly include garnet, pyroxene, epidote and wollastonite. Electron microprobe analysis shows that the end member of garnet is mainly andradite (Ad62–97Gr11–45), the pyroxene is mainly diopside, and epidote is mainly clinozoisite. These characteristics indicate that the Tayuan polymetallic skarn deposit is mainly calcareous skarn. Sometimes the content zonation can be observed in garnets. With one garnet crystal, content is shifty from the core to the rim. In general, the iron content in the core is higher than in the edge. The content in the garnet shows that the garnet in the Tayuan deposit formed from weak oxidation in alkaline environment with the oxygen fugacity increasing, suggesting that the hydrothermal fluid evolved from an acidic to a slight alkaline state. In the Tayuan polymetallic deposit, the ratio of Mn/Fe in pyroxene is about 1.3, and of Mg/Fe, it is about 2. The components of garnet in the Tayuan deposit plot in the field of the typical skarn Zn, Cu, Mo deposits in the world.
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Acknowledgments
This study was supported by the Natural Science Foundation of China (No. 41203039). Great thanks to Daxinganling Yunye Mining Development Limited Liability Company for assistance in the field. Finally, we wish to thank our reviewers very much for their constructive comments and suggestions on our manuscript.
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Li, C., Ren, T., Huang, JG. et al. Skarn mineralogy and its geological significance for the Tayuan (Cu–Mo)–Pb–Zn deposit, northern Daxinganling metallogenic belt. Acta Geochim 36, 89–101 (2017). https://doi.org/10.1007/s11631-016-0128-0
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DOI: https://doi.org/10.1007/s11631-016-0128-0