摘要
本文从粒度、重矿物、化学成分和石英电镜扫描方面研究了三峡黄土状堆积物,它们分布在秭归、巫山、奉节、云阳等地的阶地上,各方面都与河漫滩和其他阶地堆积物相似,属于河流冲积物;与典型风成黄土有显著差异。
Described in this paper are the loessal (or loess-like) deposits distributed in the Tree-Gorge area of the Changjiang (Yangtze) River in terms of grain size, heavy minerals and chemical composition in conjunction of ESM examination of quartz. The loessal deposits, composed mainly of yellowish silty loam, are dispersed on the river terraces at Zigui, Wushan, Fengjie and Yunyang. They are similar to alluvial and other terrace deposits in grain size and heavy mineral composition, but significantly different from typical eolian loess in grain size, heavy mineral composition and chemical composition. Therefore, they are considered to be fluvial rather than eolian in origin.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第3期292-300,共9页
Geochimica
