| SHRIMP zircon U-Pb age and significance of Early Paleozoic volcanic rocks in East Kunlun orogenic belt, Qinghai Province, China |
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| 作者姓名： | ZHU Yunhai LIN Qixiang JIA Chunxing & WANG Guocan .Faculty of Earth Science China University of Geosciences Wuhan China .Regional Geological Survey Academy of Qinghai Xining China |
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| 作者单位： | ZHU Yunhai1，LIN Qixiang1，JIA Chunxing2 & WANG Guocan1 1.Faculty of Earth Science，China University of Geosciences，Wuhan 430074，China; 2.Regional Geological Survey Academy of Qinghai，Xining 800003，China |
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| 摘 要： | A great deal of practical data in recent years have proved that the East Kunlun orogenic belt and even the China central orogenic belt are complex orogenic belts that underwent polycycle orogenic evolvement1―7]. Each orogenic cycle has left a compositional print, the multi-period ophiolites4―6] and various types of tec-tono-magmatic production in the same orogenic belt. There is a suite of shallow metamorphic volcanic rocks in the Nuomuhong area in the east part of the East Kunlun orogen…
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| 收稿时间： | 29 December 2004 |
| 修稿时间： | 7 April 2005 |
SHRIMP zircon U-Pb age and significance of Early Paleozoic volcanic rocks in East Kunlun orogenic belt,Qinghai Province,China |
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| ZHU Yunhai,LIN Qixiang,JIA Chunxing & WANG Guocan .Faculty of Earth Science,China University of Geosciences,Wuhan ,China, .Regional Geological Survey Academy of Qinghai,Xining ,China.SHRIMP zircon U-Pb age and significance of Early Paleozoic volcanic rocks in East Kunlun orogenic belt, Qinghai Province, China[J].Science in China(Earth Sciences),2006,49(1):88-96. |
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| Authors: | Zhu Yunhai Lin Qixiang Jia Chunxing Wang Guocan |
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| Institution: | 1. Faculty of Earth Science, China University of Geosciences, Wuhan 430074, China
2. Regional Geological Survey Academy of Qinghai, Xining 800003, China |
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| Abstract: | Early Paleozoic volcanic rocks in Nuomuhong area occurred as basalt slice and meta-volcanic slice. SHRIMP zircon U-Pb dating
of the basalt slice and the meta-volcanic slice show that the age of the basalt slice is 419±5 Ma, and that of the meta-volcanic
slice is 401±6 Ma. These ages directly testify that there existed Early Paleozoic ocean-continent transform in East Kunlun,
the basalt slice was formed in an extensional mid-ocean ridge setting and the meta-volcanic rock slice was formed in an extrusion
subduction and collision setting. The inherited zircon age of 1734 Ma in volcanic rocks reflects that the base of East Kunlun
may be Middle Proterozoic. |
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| Keywords: | volcanic rocks SHRIMP zircon U-Pb age Early Paleozoic East Kunlun orogenic belt |
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