| 新疆东天山玉海斑岩铜矿锆石SHRIMP U-Pb年龄及构造意义 |
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| 关键词:age tectonic implication porphyry copper deposit Yuhai Eastern Tianshan Mountains Xinjiang |
| 基金项目:中国地质调查局项目“新疆北部晚古生代大规模岩浆作用与成矿藕合关系研究”(编号: 1212011121092); “中国与西伯利亚二叠纪大火成岩省对比研究”(编号: 1212011120183) |
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| Zircon SHRIMP U-Pb Age of the Yuhai Porphyry Copper Deposit in Eastern Tianshan Mountains of Xinjiang and Its Tectonic Implications |
| The middle-large sized Yuhai copper deposit in Eastern Tianshan Mountains of Xinjiang was discovered in 2011 by No. 704 Geological Party of Xinjiang Nonferrous Bureau. The characteristics of geology, petrology geochemistry, orebody geology and alteration zoning show that the Yuhai copper deposit belongs to the porphyry Cu type, with ore-bearing intrusion being a set of sodium rich diorite-granodiorite bodies formed under the condition of ocean-continental subduction. Zircon SHRIMP U–Pb dating shows that the age of Yuhai intrusive rock is (422.3±4.0) Ma. This is the first discovery of an intrusive rock of early Paleozoic in the Jueluotage metallogenic belt. These data, combined with the regional tectonic evolution and the ancient oceanic crust of the Kangur tectonic belt, support the argument that North Tianshan Ocean was under the subcution state from the Ordovician to early Carboniferous, and this conclusion provides evidence for tectonic evolution of Eastern Tianshan Mountains of early Paleozoic. The results achieved by the authors provide better tectonic implications for guiding exploration of Yuhai type copper deposits in this region. |
| ZHANG Zhao-wei,ZANG Yu-shi,WANG Ya-lei,CHEN Shou-bo.2016.Zircon SHRIMP U-Pb Age of the Yuhai Porphyry Copper Deposit in Eastern Tianshan Mountains of Xinjiang and Its Tectonic Implications[J].Acta Geoscientica Sinica,37(1):59-68. |
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