| Relationship between Granite and Eclogite on the Southern Margin of the Qilian Mountains: Evidence from Zircon SHRIMP Agesof the Aolaoshan Granite |
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| 作者姓名： | WU Cailai Jone WOODEN YANG Jingsui LI Haibing Trevor IRELAND LIOU June Guang Wan Yusheng and Shi Rendeng Institute of Geology CAGS Beijing |
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| 作者单位： | WU Cailai，Jone WOODEN，YANG Jingsui，LI Haibing Trevor IRELAND，LIOU June Guang，Wan Yusheng and Shi Rendeng Institute of Geology，CAGS，Beijing 100037 Department of Geology，Stanford University，Stanford，CA 94305-2115，USA |
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| 摘 要： | Zircon SHRIMP ages of the Aolaoshan granite on the south margin of the Qilian Mts. range from 445±15.3 to 496±7.6 Ma (averaging 473 Ma), belonging to the Early Ordovician. Geochemically, the granite is similar to I-type granite and, tectonically, was formed in an island-arc environment based on relevant diagrams for structural discriminations. Considering also the regional geology, the authors suggest that the granite is part of an ultrahigh-pressure belt on the south margin of the Qilian Mts. and that its formation bears a close relationship to this belt.
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Relationship between Granite and Eclogite on the Southern Margin of the Qilian Mountains: Evidence from Zircon SHRIMP Agesof the Aolaoshan Granite |
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| Authors: | WU Cailai Jone WOODEN YANG Jingsui LI Haibing Trevor IRELAND LIOU June Guang Wan Yusheng and Shi Rendeng Institute of Geology CAGS Beijing |
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| Institution: | WU Cailai,Jone WOODEN,YANG Jingsui,LI Haibing Trevor IRELAND,LIOU June Guang,Wan Yusheng and Shi Rendeng Institute of Geology,CAGS,Beijing Department of Geology,Stanford University,Stanfor,CA -,USA |
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| Abstract: | Abstract Zircon SHRIMP ages of the Aolaoshan granite on the south margin of the Qilian Mts. range from 445±15.3 to 496±7.6 Ma (averaging 473 Ma), belonging to the Early Ordovician. Geochemically, the granite is similar to I‐type granite and, tectonically, was formed in an island‐arc environment based on relevant diagrams for structural discriminations. Considering also the regional geology, the authors suggest that the granite is part of an ultrahigh‐pressure belt on the south margin of the Qilian Mts. and that its formation bears a close relationship to this belt. |
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| Keywords: | zircon SHRIMP age Aolaoshan granite ultrahigh-pressure metamorphic belt south margin of the Qilian Mts |
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