Tectonic evolution of the western margin of the Ordos Basin (Central China)
Tectonic evolution of the western margin of the Ordos Basin (Central China)
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DOI：
10.1016/j.rgg.2007.12.002
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发表时间：
2008
影响因子：
1.1
通讯作者：
Li Rongxi;Ling Youzhu
中科院分区：
文献类型：
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作者：
Li Rongxi;Ling Youzhu
鄂尔多斯盆地西半部位于中国中部北部，华北地台西缘。西南和南部与祁连褶皱系和秦岭褶皱系接壤。其前缘东北翼逆冲于鄂尔多斯盆地古生代推覆体之上，由一系列被逆冲分隔的大型平行线状褶皱组成。盆地基底为变形变质岩，暂定为晚元古代变质岩。早寒武世至中奥陶世，鄂尔多斯地块形成了碳酸盐岩和陆源克拉通内相。中奥陶世至中石炭世，受加里东构造运动影响，地块西缘抬升为陆块，剥蚀期约150迈。晚古生代沉积了一系列含煤地层。在三叠纪，鄂尔多斯盆地充满了河流三角洲相。盆地西南缘的逆冲褶皱形成于中生代，并因喜马拉雅构造运动而加强。
The western half of the Ordos Basin lies in the north of Central China, on the western margin of the North Chinese Platform. In the southwest and south it borders the Qilian and Qinling folded systems. Their frontal northeastern flank is thrust over the Paleozoic nappe of the Ordos Basin and consists of a series of large parallel linear folds separated by thrusts. The basement of the basin is made up of deformed metamorphic rocks of tentatively Late Proterozoic age. Carbonate and terrigenous intracratonic facies accumulated on the Ordos block from Early Cambrian through Middle Ordovician. From Middle Ordovician through Middle Carboniferous, the western edge of the block was uplifted as a land as a result of Caledonian tectonic movement and underwent denudation for about 150 Myr. In the Late Paleozoic, a series of coal-bearing formations was deposited. In the Triassic, the Ordos Basin became filled with fluviolacustrine delta facies. Thrusts and folds on the southwestern margin of the basin formed in the Mesozoic and were intensified by Himalayan tectonic movements.