REE示踪沉积物物源研究进展

ＲＥＥ作为一种重要的沉积物物源示踪剂运用很广。在介绍了ＲＥＥ性质的基础上，对海水、河水、沉积岩、河流及边缘海沉积物中的ＲＥＥ元素丰度与配分模式特征进行了深入综述，概述了影响和控制ＲＥＥ丰度、模式及分馏特征的主要因素；论述了ＲＥＥ的物泊示踪意义以及在国内外应用情况与存在问题：源岩风化对ＲＥＥ分馏的影响；颗粒运及沉积时水动力分选对ＲＥＥ分馏可能造成的影响，即不同粒级中的ＲＥＥ不同的丰度与配分模式和碎屑

RESEARCH PROGRESS IN REE TRACER FOR SEDIMENT SOURCE

As an important tracer, REE is widely used to trace provenance of various sediments and sedimentary rocks. This paper firstly describes the characteristics of REE, then summarizes REE abundance and distribution patterns in seawater, freshwater , sedimentary rocks and sediments, and their main controlling factors. At last the application and problems of REE as a source rock tracer are also described in detail. Weathering of source rock can produce REE fractionation, especially during strong chemical weathering; Transport of particles and hydrodynamic sorting during formation of sediment also have potential influences on REE characters in sediment. REE abundance and patterns are different in different grain sized sediments. It is generally regarded that clay has REE composition most close to source rock, whereas sandy sediment differentiates from source rock in REE composition, because detritus minerals can also obviously influence REE content and distribution patterns in sediment. REE normalizing and determining problems are discussed in the end of the paper.