Abstract
Granitoids and related pegmatitic rare-metal deposits are widespread in China’s Altay region, they used to be considered as Hercynian rocks and mineral deposits. Reported here are the40Ar-39Ar ages of potassium-rich minerals (muscovite and microcline) in the Koktokay pegmatitic rare-metal orefield and whole-rock as well as quartz fluid-inclusion Rb-Sr isochron ages of granite and ores in the Shangkelan pegmatite rare-metal orefield. The ages indicate that there are Yanshanian Diagenetic Mineralization events happening in China’s Altay orogenic belt and that formation of the famous Koktokay No.3 pegmatitic rare-metal deposit endured about 30 Ma of magmatic crystallization differentiation.
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Chen, F., Li, H., Wang, D. et al. New chronological evidence for Yanshanian diagenetic mineralization in China’s Altay orogenic belt. Chin. Sci. Bull. 45, 108–114 (2000). https://doi.org/10.1007/BF02884652
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DOI: https://doi.org/10.1007/BF02884652