Depositional characteristics and variations of different channel deposits in the Kaidu River of Yanqi Basin, Xinjiang
Shi Yuxin1, 2, Gao Zhiyong2, Zhou Chuanmin2, Zhou Zhenglong3
1 School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083; 2 Petroleum Geology Research and Laboratory Center RIPED,Beijing 100083; 3 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249
Abstract：The Kaidu River is a typical perennial internal river with abundant sediment located in the Yanqi Basin under arid climate condition. The catchment of the river is the Tianshan Mountain and the river drains into the Bostan Lake. A complete range of different channel deposits are recognized from source to sink of the associated depositional system,including straight,meandering,braided and anastomosing channel patterns. Depositional facies,depositional processes and heavy mineral distributions were documented and analyzed statistically in relation with transport distance. The result shows that channel patterns and sedimentary facies are controlled by climate,composition of sediments,geography and slope. The grain size of sediments shows strong decreasing trend over transport distance. These results promoted the development of a facies models for the Kaidu River and the Bostan Lake. Since the proposed model incorporates quantitative analysis of the sediments and facies,it’s promising to provide a modern analog for the interpretation of its ancient counterparts.
Shi Yuxin,Gao Zhiyong,Zhou Chuanmin et al. Depositional characteristics and variations of different channel deposits in the Kaidu River of Yanqi Basin, Xinjiang[J]. JOPC, 2017, 19(6): 1037-1048.
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