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Discovery of the Jinningian Orogenic Belt on the Northern Margin of Yangtze Craton in Mountain Dahong

HU Zheng-xiang;MAO Xin-wu;TIAN Wang-xue;LI Xiong-wei;Hubei Geological Survey;  
Researchers still have different understandings on the geotectonic evolution of Mountain Dahong in southern Suizhou.Some progress has been made in the regional geological survey of the area recently,i.e.,the Yuan'an-Jingshan block,the Mountain Dahong subduction-accretionary complex,and the Sanligang magmatic arc were identified.In the Mountain Dahong subduction-accretionary complex,MOR-type diabase and oceanic island basalt yield 820 Ma and 817 Ma,respectively.And in the Sanligang magmatic arc,arc dacite and tonalite yield841 Ma and 876.9 Ma,respectively.These data confirmed the existence of the Jinningian orogenic belt on the northern margin of Yangtze Craton in Hubei Province for the first time.
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