水-岩反应与稀土元素行为

被引：23

作者：

凌其聪

刘丛强

机构：

[1] 中国科学院地球化学研究所!贵阳中国地质大学地球科学学院,武汉,中国科学院地球化学研究所!贵阳

来源：

矿物学报 | 2001年 / 01期

关键词：

水-岩反应; 稀土元素活动性; 地球化学;

D O I：

10.16461/j.cnki.1000-4734.2001.01.018

中图分类号：

P592 [水地球化学];

学科分类号：

摘要：

大量研究表明 ,水岩反应过程中REE表现为不同程度的活动性。富含各种络合剂的流体与岩石反应时可活化REE ;水岩反应过程中既可出现HREE优先活化 ,亦可出现LREE优先活化 ,这取决于流体的化学成分、Eh、pH以及REE的寄主相及其赋存状态 ;水岩反应过程中的可出现Eu的正异常、负异常或无异常 ,其主要影响因素是流体的氧化还原状态 ;单矿物组合的REE行为受制于矿物的晶体化学性质 ,而多矿物组合则取决于体系的Eh、pH、水 /岩值和络合剂浓度等 ,目前亟待开展实验工作有 :①流体的化学组成及其性质 ,尤其是各种络合剂的活度及其对REE的活动性的影响 ;②REE在热液矿物与流体相之间的分异机制及控制因素 ;③T、P、pH、Eh和水 /岩比如何影响REE的活动性和分异行为。

引用

页码：107 / 114

页数：8

共 9 条

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