地质科技情报2011，Vol.30Issue(4)：21-28,8.
南黄海中部泥质沉积区DLC70-3孔稀土元素及环境意义
REE of DLC70-3 Core Sediments from Mud Areas in the Central South Yellow Sea and Its Environmental Significance
摘要
Abstract
By the whole-rock analysis on 2REE, distribution mode, differentiation index and other geo-chemical related indicators of DLC70-3 core sediments from north margin of mud areas in the central South Yellow Sea, the paper discusses the provenance of the sediments and the controlling factors of 2REE variation. The results show that; UCC (upper continental crust) standard distribution modes of REE in DLC70-3 core sediments are all of a similar distribution mode of modern Yellow River sediments which is moderately rich in light rare earth element (LREE) , with slow right slopes and negative Eu anomaly. The differentiation parameters features of (Gd/Yb)ucc-(La/Yb)ucc and LREE/HREE-2REE are relatively consistent with that of modern Yellow River sediments, while quite different from Korea Peninsula rivers sediments. Combined with discrimination function (FD) , it is inferred that DLC70-3 core sediments originate mainly from Yellow River; furthermore, 2REE values vary longitudinally over a range of 99. 49 - 237. 22 μg/g with an average of 192. 96 μg/g (without Y). The good relationship of this longitudinal variation with CIA, and the correspondence of high value of 2REE to that of CIA or vice versa indicates that variation of 2REE is controlled by chemical weathering of source region, and can be a good indicator of chemical weathering intensity.关键词
南黄海/稀土元素/物源/化学风化Key words
South Yellow Sea/ REE/ provenance/ chemical weathering分类
海洋学引用本文复制引用
梅西,张训华,李日辉..南黄海中部泥质沉积区DLC70-3孔稀土元素及环境意义[J].地质科技情报,2011,30(4):21-28,8.基金项目
国土资源部海洋地质调查专项(GZH200800501) （GZH200800501）
国家自然科学基金项目(41040041) （41040041）
