Analysis of the Sedimentary Characteristics of a Modern Distributive Fluvial System:A Case Study of the Great Halten River in the Sugan Lake Basin,Qinghai,China  

作　　者：Xianghui Zhang Changmin Zhang Adrian Hartley Qinghai Xu Wenjie Feng Taiju Yin Rui Zhu 

机构地区：[1]School of Geosciences,Yangtze University,Wuhan 430100,China [2]Department of Geology and Petroleum Geology,School of Geosciences,University of Aberdeen,Aberdeen AB243UE,UK

出　　处：《Journal of Earth Science》2023年第4期1249-1262,共14页地球科学学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.41772094 and 42130813)。

摘　　要：Understanding controls on river planform changes can help to build predictive models for distributive fluvial systems,and then guide the oil and gas exploration.To do this we have undertaken a detailed investigation of the modern Great Halten River distributive fluvial system from the Sugan Lake Basin,Qinghai,China.Unmanned aerial vehicle(UAV) photography,satellite remote sensing data and elemental analysis were used to determine differences in the sedimentary characteristics of the distributive fluvial system.From the apex to the toe,the changes in the slope,river morphology,sedimentary characteristics and element content in different regions were determined and three facies belts:“proximal”,“medial” and “distal” were identified.We found that the sedimentary structure and elemental content characteristics of each facies differ greatly.We compare the large-scale evolution of rivers from braided to meandering rivers,and the fine description of sedimentary characteristics in combination with each observation,we strengthen our overall understanding of the modern DFS from macro to micro scale.At the same time,we summarize the sedimentation model of the Great Halten River DFS,and our study provides a reference for establishing the sedimentary model in continental petroliferous basins.

关 键 词：Sugan Lake Basin distributive fluvial system river morphology sedimentary model sedimentary structure sedimentology. 

分 类 号：P618.13[天文地球—矿床学]