Granitoids and related pegmatitic rare-metal deposits are widespread in China’s Altay region,they used to be considered as Hercynian rocks and mineral *** here are the^40Ar^39Ar ages of potassium-rich minerals (musco...
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Granitoids and related pegmatitic rare-metal deposits are widespread in China’s Altay region,they used to be considered as Hercynian rocks and mineral *** here are the^40Ar^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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