南黄海表层沉积物稀土元素分布与物源关系  

Distributions of Rare Earth Elements and Provenance Relations in the Surface Sediments of the South Yellow Sea

作　　者：蓝先洪[1] 王红霞[1] 张志珣[1] 林振宏[2] 李日辉[1] 王中波[1] 

机构地区：[1]青岛海洋地质研究所,山东青岛266071 [2]中国海洋大学海洋地球科学学院,山东青岛266003

出　　处：《中国稀土学报》2006年第6期745-749,共5页Journal of the Chinese Society of Rare Earths

基　　金：国土资源大调查项目资助(200211000001)

摘　　要：对南黄海295个表层沉积物样品稀土元素的电感耦合等离子体质谱法分析,结果表明,南黄海表层沉积物稀土元素平均含量为188.39μg.g-1,稀土富集与重矿物有密切关系;稀土元素的球粒陨石配分模式均呈现Eu负异常,模式具负斜率,表明表层沉积物物质主要来源于大陆地壳。从稀土元素地球化学特征的区域变化来看,南黄海东部沉积物来源于朝鲜半岛,西部沉积物来源于黄河和长江物质输入,中部细粒沉积物主要与黄河及长江物质东南、东北扩散有关,东南部为朝鲜半岛及黄河、长江物质共同作用的结果。Analyses of rare earth elements （REEs） in 295 surface sediment samples collected from the South Yellow Sea were conducted using Inductively Coupled Plasma-Mass-Spectrometry （ ICP-MS ）. The results show that the average content of REEs in surface sediments of the South Yellow Sea is 188.39 μg·g^-1, and the REEs enrichment has a close relationship with the heavy minerals. The chondrite-normalized REE patterns of were characterized by the negative Eu abnormally and the negative gradient, indicating that the main material sources of surface sediments are of matter from the mainland earth crust. In terms of local distribution of REE geochemistry, it is inferred that sediments on the eastern region of the South Yellow Sea are derived from the Korean peninsula, sediments on the western region come from the Yangtze River and Yellow River; fine particle sediments in the central region mainly are possibly related to southeast, northeast diffusion of the Yellow River and Yangtze River material, material in the southeast region is coefficient for the material in Korean peninsula and Yellow River, Yangtze River.

关 键 词：物源 表层沉积物 南黄海 稀土元素 

分 类 号：P595[天文地球—地球化学] P736.4[天文地球—地质学]