- EarlyYanshanianintrusionsaremainlyadamellite,biotiteK-feldspargranitewithsmallamountofgranodiorite.LyingsoutheastofCoqenCountyinwesternTibetandtectonicallywithinLhasaterrain,theRi'acopperdepositisaskarncopperdepositrelatedtoanadamelliteporphyrystock...
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