Title: Sedimentary environment of Yanchang formation of the Upper Triassic in Ruqigou basin
Abstract: Based on studying carefully sedimentary environment of Yanchang formation of the Upper Triassic series in Ruqigou basin, in the stratum there are three group lithology assemblage which form sedimentary systems of alluvial fan, braided stream, braided delta and lake by influencing paleoclimate and tectonic movement. The sandbodies of braided stream is very thick and the scope of the sandbodies is widespread. In deep lake, tarbidite which is found for the first time is developed and mainly consists of four stratigraphic sequences which include ABE, AE, BCDE and CDE styles sequences. From early period to late period of Upper Triassic, climate had evolved from semiarid to moist. The basin had sunk rapidly in early phase of Upper Triassic and the basin became slowly stable in the phase.
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: article
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Cited By Count: 2
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