| Ophiolites from the Mianlue Suture in the Southern Qinling and Their Relationship with the Eastern Paleotethys Evolution |
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| 作者姓名： | LAI Shaocong ZHANG Guowei and LI SanzhongKey Laboratory of Continental Dynamics Ministry of Education |
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| 作者单位： | LAI Shaocong，ZHANG Guowei and LI SanzhongKey Laboratory of Continental Dynamics，Ministry of Education; Department of Geology，Northwest University，Xi'an，Shaanxi 710069; College of Earth Science，Ocean University of Qingdao，Qingdao，Shandong 266003 |
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| 摘 要： | The Mianlue suture extends from Derni-Nanping-Pipasi-Kangxian to the Lueyang-Mianxian area, then traverses the Bashan arcuate structure eastward to the Huashan region, and finally to the Qingshuihe area of the southern Dabie Mountains. From east to west, with a length of over 1500 km, the ophiolitic melange associations are distributed discontinuously along the suture. The rock assemblages include ophiolite, island-arc and oceanic island rock series, indicating that there existed a suture zone and a vanished paleo-ocean basin. The Mianliie paleo-ocean basin experienced its main expansion and formation process during the Carboniferous-Permian and closed totally in the Triassic. It belongs to the northern branch of the eastern paleotethys, separated from the northern margin of the Yangtze block under the paleotethys mantle dynamic system.
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Ophiolites from the Mianlue Suture in the Southern Qinling and Their Relationship with the Eastern Paleotethys Evolution |
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| Authors: | LAI Shaocong ZHANG Guowei and LI SanzhongKey Laboratory of Continental Dynamics Ministry of Education |
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| Institution: | LAI Shaocong,ZHANG Guowei and LI SanzhongKey Laboratory of Continental Dynamics,Ministry of Education,Department of Geology,Northwest University,Xi'an,Shaanxi,College of Earth Science,Ocean University of Qingdao,Qingdao,Shandong |
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| Abstract: | The Mianlue suture extends from Derni-Nanping-Pipasi-Kangxian to the Lueyang-Mianxian area, then traverses the Bashan arcuate structure eastward to the Huashan region, and finally to the Qingshuihe area of the southern Dabie Mountains. From east to west, with a length of over 1500 km, the ophiolitic melange associations are distributed discontinuously along the suture. The rock assemblages include ophiolite, island-arc and oceanic island rock series, indicating that there existed a suture zone and a vanished paleo-ocean basin. The Mianliie paleo-ocean basin experienced its main expansion and formation process during the Carboniferous-Permian and closed totally in the Triassic. It belongs to the northern branch of the eastern paleotethys, separated from the northern margin of the Yangtze block under the paleotethys mantle dynamic system. |
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| Keywords: | ophiolite volcanic rocks geochemistry Mianliie suture southern Qinling Tethys |
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