成都理工大学学报（自然科学版）2018，Vol.45Issue(2)：189-198,10.DOI:10.3969/j.issn.1671-9727.2018.02.06
重庆-宜昌地区第四纪沉积物中重矿物特征及其对三峡演化的指示
Characters of heavy minerals in Quaternary sediments from Chongqing to Yichang and its implication to the evolution of the Three Gorges of Yangtze River, China
摘要
Abstract
Quaternary sediments from the Three Gorges of the Yangtze River are studied in order to investigate the evolution of the Yangtze Three Gorges.On the basis of discussion on the sedimentary environment of Quaternary sediments in Sichuan Basin and the Jianghan Basin,combined with the research of the type,content and combination characteristics of heavy minerals in Quaternary sediments,it is found that the characteristics of heavy minerals in the lower planation surface of the Three Gorges are similar to those in the sediments of Yunchi Formation and Shanxiyao Formation,and are different from those in sediments of the Yangtze River terraces.A conclusion can be drawn that there were 2 drainage systems separated by Huangling Dome before the cutting through of the Yangtze Three Gorges,and the Huangling Dome divided the ancient-Yangtze River into two rivers flowing eastward and westward respectively.Therefore,the cutting through of Three Gorges of Yangtze River occurred later than the formation time of the lower planation surface,and also later than the formation time of Yunchi Formation and Shanxiyao Formation.关键词
长江三峡/重庆-宜昌地区/第四系/重矿物/物源Key words
Three Gorges of Yangtze River/Chongqing to Yichang area/Quaternary/heavy minerals/provenance分类
天文与地球科学引用本文复制引用
刘一鸣,向芳,陈灼华,杜雯,李树霞..重庆-宜昌地区第四纪沉积物中重矿物特征及其对三峡演化的指示[J].成都理工大学学报（自然科学版）,2018,45(2):189-198,10.基金项目
国家自然科学基金项目(41572093,41072083) （41572093,41072083）
成都理工大学优秀创新团队培育计划项目(KYTD201703). （KYTD201703）
