黄河口及莱州湾表层沉积物中重矿物分布与来源  

DISTRIBUTION AND PROVENANCE OF THE SURFACE SEDIMENTS OF THE YELLOW RIVER MOUTH AND LAIZHOU BAY DEDUCED FROM HEAVY MINERALS

作　　者：王昆山[1] 石学法[1] 蔡善武 乔淑卿[1] 姜晓黎[1] 

机构地区：[1]海洋沉积与环境地质国家海洋局重点实验室,国家海洋局第一海洋研究所,青岛266061 [2]深圳博伦职业技术学校,深圳518052

出　　处：《海洋地质与第四纪地质》2010年第6期1-8,共8页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(40806026);国家海洋局“908”专项项目(908-02-0205);国家海洋公益项目(200805063)

摘　　要：对2007年采自渤海黄河口和莱州湾内250个表层沉积物进行了重矿物研究。结果表明,黄河口和莱州湾重矿物含量很低,平均为1.51%,优势重矿物组合为云母-普通角闪石-绿帘石,其中白云母含量高于黑云母。重矿物分布和组合分区表明沉积物的物质来源主要为黄河口输入物质,莱州湾西南部河流输入物质及山东半岛西部岛屿冲刷产物为次要物质来源;重矿物特别是云母类可作为沉积物输送和扩散的指标,综合其他矿物分布特征得出,黄河入海沉积物的扩散趋势在南北向以北向为主要的输送方向,黄河口物质具有向东扩散的趋势。A total of 250 surface samples collected from the Yellow River mouth and Laizhou Bay in 2007 were analyzed for heavy minerals. The content of heavy minerals on an average of 1.51 % is very low in the study area. The assemblage of mica, hornblend and epidote dominates over the others, and the content of muscovite is higher than that of biotite. The heavy mineral distribution pattern and provinces show that the surface sediments in the study area are mainly from the Yellow River, with some from the local rivers southwest to the Laizhou Bay and scattered islands to the west of Shandong Peninsula as the second. The heavy minerals, especially mica can be used as an indicator to trace the path of sediments transportation. According to the distribution pattern of mica, it is concluded that the Yellow River sediments were mainly transported to the south and east.

关 键 词：沉积物 物质来源 重矿物 莱州湾 黄河口 

分 类 号：P736.21[天文地球—海洋地质]