锡矿山锑矿田硅化岩的稀土元素特征及其地质意义  

REE GEOCHEMICAL CHARACTERISTICS OF SILICIFIED ROCKS OF XIKUANGSHAN ANTIMONY DEPOSITS AND THEIR GEOLOGICAL SIGNIFICANCE

作　　者：唐建武[1] 金景福[1] 陶琰[1] 

机构地区：[1]成都理工学院,成都610059

出　　处：《地质地球化学》1999年第4期40-44,共5页Geology-Geochemistry

基　　金：地矿部科技定向攻关课题!"湘中锡矿山式锑矿找矿靶区研究"(地科定 96 - 13)资助项目

摘　　要：湘中锡矿山锑矿田是世界闻名的超大型锑矿田。本文系统地叙述了该矿田该中各矿床蚀变硅化岩及其原岩的稀土元素地球化学特征 ,并在此基础上探讨了稀土元素所反映的地质意义。研究表明 ,尽管硅化岩的稀土元素地球化学特征与原岩相比有所改变 ,但仍可根据硅化岩的稀土元素地球化学特征来恢复原岩 ;根据硅化灰岩的稀土元素地球化学特征可以推测硅质岩的物质来源于地壳上部 ,结合本区硅化岩的硅同位素组成特点 ,可以推测硅质交代中的硅来源于周围地层 ;硅化岩的稀土元素变化特征证明了岩性为石灰岩的层位易于发生硅化 ,从而有利于矿化层的形成。In this paper, the REE geochemical characteristics of altered rocks and unaltered rocks are described and their geological significance is discussed. Studies indicate that the silicified rocks can be recognized for their primary rocks in spite of some changes in REE geochemical characteristics during silicification. Silicon originated from wall rocks according to REE characteristics of silicified limestone. REE characteristics of silicified rocks show that limestone is easy to silicify and mineralize, so the carbonate layer is a favorable mineralization layer.\;

关 键 词：稀土元素 锡矿山 锑矿田 硅化岩 稀土元素 

分 类 号：P618.660.4[天文地球—矿床学] P588.244[天文地球—地质学]