白银矿田外围横湾沟硅质岩的研究意义  

THE STUDY OF SILICALITE AT PERIPHERY(HENGWANGOU) OF BAIYIN OREFIELD AND ITS SIGNIFICANCE

作　　者：高红卫[1] 

机构地区：[1]白银公司地质队,甘肃白银730900

出　　处：《甘肃地质学报》2001年第1期50-53,共4页Acta Geologica Gansu

基　　金：国家科委"九五"科技攻关项目!(96 914 0 3 0 3 3)

摘　　要：热水沉积硅质岩既有一定的找矿意义 ,又有重要的理论意义。由硅质岩的常量元素、稀土元素等地球化学特征研究表明 ,横湾沟硅质岩具有热水沉积硅质岩地球化学特征 ,在Al -Fe-Mn三角图上 ,属热水沉积硅质岩。由δCe值分析表明 ,本区硅质岩沉积环境主要为大陆边缘。The hot-water sedimentary silicalite,which has not only significance on ore-search but also it has important theoretical significance.The geochemical characteristics of invariable primary elements and REE of the silicalite shows that the silicalite in Hengwangon possess geochemical features of hot-water sedimentary silicalite and belongs to hot-water sedimentary silicalite on the diegram of Al-Fe-Mn.The analysis of δCe value of that shows that its sedimentary environment is at contimental margin.

关 键 词：硅质岩 地球化学 热水沉积 沉积环境 横湾沟 稀土元素 

分 类 号：P588.244[天文地球—岩石学]