Zircon SHRIMP U-Pb Dating and Its Geological Significance of Mineralization in Tuwu—Yandong Porphyry Copper Mine,East Tianshan Mountain
Zircon SHRIMP U-Pb Dating and Its Geological Significance of Mineralization in Tuwu—Yandong Porphyry Copper Mine,East Tianshan Mountain
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发表时间：
2005
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通讯作者：
Chen Fuwen
中科院分区：
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作者：
Chen Fuwen
The metallogenetic age of Tuwu—Yandong porphyry copper deposit in eastern Tianshan Mountain is in dispute. According to fossils found in the interlayer of tuffaceous siltstone and regional analogy of strata,some predecessors believed that the host volcanic rocks were formed in the active continent margin of the Kazakstan—Junggar paleo-plate during Carboniferous. Based on Middle Devonian—Early Carboniferous isotopic ages(390～360Ma)obtained in recent years,some others considered that the host volcanic rocks and mineralized plagiogranite porphyry were formed in the active margin of the Tarim Paleo-plate during Middle Devonian and mineralization should be resulted from Devonian island-arc volcanism and magmatic intrusion. However,zircon SHRIMP U-Pb dating shows that the mineralized plagiogranite porphyry was emplaced around 330Ma,indicating that the Tuwu—Yandong porphyry copper deposit was formed during Carboniferous related to high-level emplacement of calc-alkaline magma.
