| Relationships Between the North China Plate and the Tarim Plate |
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| 作者姓名： | Wang Tingyin Wang Jinrong Liu Jinkun D epartment of Geology Lanzhou U niversity Lanzhou GansuWang Shizheng Ningxia Bureau of Geology and Mineral Resources Yinchuan Ningxiaand Wu Jiahong Shenyang Institute of Geology and Mineral Resources Shenyang Liaoning |
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| 作者单位： | Wang Tingyin，Wang Jinrong，Liu Jinkun，D epartment of Geology，Lanzhou U niversity，Lanzhou，GansuWang Shizheng，Ningxia Bureau of Geology and Mineral Resources，Yinchuan，Ningxiaand Wu Jiahong Shenyang Institute of Geology and Mineral Resources，Shenyang，Liaoning |
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| 基金项目： | Project 9487001 supported by the National Natural Science Foundation of China，the Analysis Centre of the Zhongguancun Distrjct of Beijing |
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| 摘 要： | The relationships and boundary between the North China and Tarim plates have been unclear for a long time ; however, the two plates occupy a prominent position in the formation and evolution of the continental lithosphere of China. It is proposed that the Engger Us ophiolitic melange zone discovered recently north of Alaxa is a typical suture between the two plates. The ophiolitic melange zone is composed mainly of a mixture of fragments of ancient oceanic crust and sedimentary rocks of active and passive continental margins. The melange may be divided into tectonic inclusions and matrix. The suture extends northeastwards into the Republic of Mongolia and probably westwards to meet the Altun fault. With the Engger Us ophiolitic melange zone as the boundary the Alaxa area may be divided into two parts: the northern part (AN ) belongs to the Tarim plate, while the southern part (AS) the North China plate. Geological evidence shows that the two plates were amalgamated in the Late Permian or a bit later.
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Relationships Between the North China Plate and the Tarim Plate |
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| Authors: | Wang Tingyin Wang Jinrong Liu Jinkun D epartment of Geology Lanzhou U niversity Lanzhou GansuWang Shizheng Ningxia Bureau of Geology and Mineral Resources Yinchuan Ningxiaand Wu Jiahong Shenyang Institute of Geology and Mineral Resources Shenyang Liaoning |
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| Abstract: | The relationships and boundary between the North China and Tarim plates have been unclear for a long time ; however, the two plates occupy a prominent position in the formation and evolution of the continental lithosphere of China. It is proposed that the Engger Us ophiolitic melange zone discovered recently north of Alaxa is a typical suture between the two plates. The ophiolitic melange zone is composed mainly of a mixture of fragments of ancient oceanic crust and sedimentary rocks of active and passive continental margins. The melange may be divided into tectonic inclusions and matrix. The suture extends northeastwards into the Republic of Mongolia and probably westwards to meet the Altun fault. With the Engger Us ophiolitic melange zone as the boundary the Alaxa area may be divided into two parts: the northern part (AN ) belongs to the Tarim plate, while the southern part (AS) the North China plate. Geological evidence shows that the two plates were amalgamated in the Late Permian or a bit later. |
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| Keywords: | North China plate Tarim plate ophiolitic melange tectonic evolution |
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