The mother rocks of copper deposit in Sanchakou are quartz diorite(porphyrite)and quartz-mica-diorite-porphyrite of marginal facies from quartz-diorite and diorite rock body of middle Hercynian.
三岔口铜矿含矿主岩为海西中期石英闪长岩—闪长岩体边缘相石类闪长（玢）岩和英云闪长斑岩。
The mother rocks of copper deposit in Sanchakou are quartz diorite(porphyrite)and quartz-mica-diorite-porphyrite of marginal facies from quartz-diorite and diorite rock body of middle Hercynian.
三岔口铜矿含矿主岩为海西中期石英闪长岩—闪长岩体边缘相石类闪长（玢）岩和英云闪长斑岩。
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