CAJ | 학술논문

依据对长江口外表层沉积物187个站位沉积物样品的黏土矿物含量分析,研究了长江口外表层沉积物黏土矿物的组合特征和分布规律。长江口外表层沉积物伊利石为优势矿物,平均含量为60.3%;次之为蒙脱石,平均为14.9%;高龄石平均含量13.5%,绿泥石平均含量为12.3%。黏土矿物的组合类型以伊利石-蒙脱石-高岭石-绿泥石型为主,伊利石-高岭石-绿泥石-蒙脱石型次之;长江口外表层沉积物黏土矿物主要为陆源成因,物质主要来源于黄河和长江的供给。Q型聚类分析显示,现代黄河物质及老黄河物质主要沉积于研究区东北部北纬29°30′以北地区,长江物质主要在研究区西部及中部区域沉积。
의거대장강구외표층침적물187개참위침적물양품적점토광물함량분석,연구료장강구외표층침적물점토광물적조합특정화분포규률。장강구외표층침적물이리석위우세광물,평균함량위60.3%;차지위몽탈석,평균위14.9%;고령석평균함량13.5%,록니석평균함량위12.3%。점토광물적조합류형이이리석-몽탈석-고령석-록니석형위주,이리석-고령석-록니석-몽탈석형차지;장강구외표층침적물점토광물주요위륙원성인,물질주요래원우황하화장강적공급。Q형취류분석현시,현대황하물질급로황하물질주요침적우연구구동북부북위29°30′이북지구,장강물질주요재연구구서부급중부구역침적。
Based on the clay minerals, content analysis from 187 stations in the surface sediments, this paper dealt with the assemblages and the distributions of clay minerals in the surface sediments off the Yangtze River estuary. The research results showed that the illite dominates the surface sediments off the Yangtze River estuary with the smectite or kaolinite the second rank and chlorite the third rank; the illite-smectite-kaolinite-chlorite-assemblage is the main type of the clay minerals assemblage in the area, with the illite-kaolinite-chlorite-smectite-type as the second rank; the source of clay mineral is mainly from the Yellow River and the Yangtze River. The Q-type cluster analysis show that sediments from both recent and ancient Yellow River were deposited mainly in the northeast part of the study area to the north of 29°30′. Substance from the Yangtze River was deposited mainly in the western and middle parts off the Yangtze River estuary.