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An Analysis of Paleogene-Neogene Sedimentary Framework and Basin Evolution of Tuotuohe Basin in the Northern Segment of the Sanjiang Region
详细信息   
摘要

 Based on an analysis of sedimentary sequence, regional unconformity, lithologic character and distribution of Paleogene-Neogene sediments, the authors hold that the Paleogene-Neogene sediments can be divided into four upward-shallowing sequences of Tuotuohe Formation, Yaxicuo Formation, Wudaoliang Formation and Quguo Formation, which constitute two complete continental orogenic molasses formation sequences. The analysis shows that the Paleogene-Neogene Tuotuohe Basin has experienced such evolutionary stages as foreland basin evolution stage (56.545.0 Ma)→strike-slip pull-apart basin stage (45.030.0 Ma)→overall uplift and intermountain residual basin stage (23.516.0 Ma)→foreland basin-confined basin-intermountain residual basin stage (162.6 Ma).

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