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从鄂尔多斯盆地西缘地区基本地质事实出发,充分汲取前人的有益成果,历史的分析鄂尔多斯盆地西缘构造应力场特点,结合晚三叠世以来鄂尔多斯盆地西缘盆—山转换的沉积响应,合理利用地震资料所揭示的西缘深部的“CT”图像及物源分析等第一手资料,提出“西缘古陆梁”及“银川古隆起”在印支期是不存在的;燕山主期盆地西缘南段可能形成古陆梁,使得六盘山盆地和鄂尔多斯盆地具一定的分割性,但随后在早白垩世又被夷平,鄂尔多斯盆地又和包括六盘山盆地在内的西部白垩纪盆地连通,鄂尔多斯盆地西界真正形成的时间应在喜山晚期,这也是盆地西缘桌子山—贺兰山—六盘山(“南北向古陆梁”)形成的大致时间,它们是印度板块和太平洋板块远距离应力作用的结果。
Based on the basic geologic facts in the western margin of the Ordos Basin, this study fully draws on the beneficial results of previous generations. Based on the historical analysis of the tectonic stress field in the western margin of the Ordos Basin and the sedimentary response of the basin-mountain transition in the western margin of the Ordos Basin since the Late Triassic, Based on the first-hand data of CT images and provenance analysis in the deep western margin revealed by seismic data, it is concluded that “the western margin of the ancient continental beam” and the “Yinchuan paleohigh” do not exist in the Indosinian period; The continental shelf may be formed in the southern segment of the western margin of the basin, which makes the Liupanshan and Erdos basins have certain segregation, but was later flattened in the Early Cretaceous. The Ordos Basin, in turn, overlaps the western Cretaceous basin including the Liupanshan Basin , The true time of western Ordos Basin should be formed in the late Himalayan time, which is also the approximate time for the formation of the Table Mountain - Helan Mountain - Liupanshan (“North-South Paleo-Continental Liang”) in the western margin of the basin. These are the Indian Plate and the Pacific Plate The result of stress effect.