Re-Os Dating of Molybdenite from the Shesuo Copper Polymetallic Ore in Shenzha County,Tibet and Its Geological Significance
Re-Os Dating of Molybdenite from the Shesuo Copper Polymetallic Ore in Shenzha County,Tibet and Its Geological Significance
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发表时间：
2009
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通讯作者：
Zhao Yuanyi
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作者：
Zhao Yuanyi
舍索铜多金属矿存款位于西藏申扎县雄美镇南4km处，是冈底斯成矿带北方目前生产的几个矿床之一，辉橄榄岩Re-Os等时线年龄为116.2±1.9 Ma，平均模式年龄为115.7±1.3 Ma，因此，舍索铜多金属存款的成矿时代可能为116 Ma，是燕山晚期的产物，与冈底斯成矿带的成矿时代明显不同，该存款应是班公湖-怒江带封闭后碰撞作用的产物。怒江缝合带及其成矿物质可能与壳源密切相关。
The Shesuo copper polymetallic ore deposit is located in 4km of south of Xiongmei Town,Shenzha County,Tibet.It is one of several deposits in the northern part of the Gangdis ore belt under the production at present.The age of Re-Os isotime line from molybdenite is 116.2±1.9 Ma,with an average model age of 115.7±1.3 Ma.Therefore,the age of Shesuo copper polymetallic ore deposit is likely 116 Ma and the product at late Yanshan epoch.Its age is obviously different from that of Gangdise ore belt,but similar to that of Bangong Co-Nujiang belt.This deposit should be the result of postcollision after the closure of Bangong Co-Nujiang suture belt and its ore-forming material may be closely related to the crustual source.