SHRIMP Zircon U-Pb Dating of Gabbro and Granite from the Huashan Ophiolite,Qinling Orogenic Belt,China: Neoproterozoic Suture on the Northern Margin of the Yangtze Craton

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SHRIMP Zircon U-Pb Dating of Gabbro and Granite from the Huashan Ophiolite,Qinling Orogenic Belt,China: Neoproterozoic Suture on the Northern Margin of the Yangtze Craton
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The recently identified Huashan ophiolitic melange was considered as the eastern part of the Mianliie suture in the Qinling orogenic belt. SHRIMP zircon U-Pb geochronology on gabbro from the Huashan ophiolite and granite intruding basic volcanic rocks indicates crystallization ages of 947±14 Ma and 876±17 Ma respectively. These ages do not support a recently proposed Hercynian Huashan Ocean, but rather favor that a Neoproterozoic suture assemblage (ophiolite) is incorporated into the younger (Phanerozoic) Qinling orogenic belt.

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SHI Yuruo, LIU Dunyi, ZHANG Zongqing, MIAO Laicheng, ZHANG Fuqin, XUE Hongmei Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing Institute of Geology, Geophysics, Chinese Academy of Sciences, Beijing No. Geological Team, Xinjiang Bureau of Geology, Mineral Resources, Altay, Xinjiang .2007. SHRIMP Zircon U-Pb Dating of Gabbro and Granite from the Huashan Ophiolite, Qinling Orogenic Belt, China: Neoproterozoic Suture on the Northern Margin of the Yangtze Craton[J]. Acta Geologica Sinica(),81(2):239-243

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