贵州戈塘金矿SBT地球化学研究  

A Study on the Geochemical Characteristics of SBT in Getang Gold Deposit

作　　者：刘帅[1] 张培兴[1] 熊灿娟[1] 王大福 刘建中[1,2] 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550025 [2]贵州省地质矿产勘查开发局105地质队,贵州贵阳550018

出　　处：《贵州大学学报（自然科学版）》2013年第5期43-48,共6页Journal of Guizhou University:Natural Sciences

基　　金：中国地质调查局项目资助(12120113094400)

摘　　要：贵州戈塘金矿为赋存于中二叠统茅口组与上二叠统龙潭组之间构造蚀变体(SBT)中的层状大型金矿床,本文对赋矿岩石SBT和矿体围岩的地球化学特征进行研究,结果表明:SBT表现为强烈的角砾岩化、硅化、去碳酸盐化;SBT具有低Ba、Be、Rb、Co、Ni、Ga和较低的稀土元素含量,稀土元素配分曲线为轻稀土富集的平缓型右倾型曲线,四分组效应明显;SBT的U/Th值均大于1,其原始成分应为陆缘碎屑物质,为构造热液蚀变作用的结果,热液可能为深源流体演化而成;SBT中Si、Al、Au、As、Sb显著富集,成矿元素可能来自下地壳或更深的源区。Getang gold deposit is a large type carlin-gold deposits, gold mineral mainly occur in the SBT which between early Permian mao-kou group and later Permian long-tan group. The geochemistry characteristics from the ore rock of SBT and surrounding rock were studied in this paper. The results show that ： SBT appeared strong breccia, Silicide and lost-carbonatization; the content of Ba, Be, Rb, Co, Ni, Ga and rare earth elements in the sbt are low, The REE distribution patterns show LREE-rich type and curve lean to the right, roke of SBT U/Th value 〉 1, it original components could be the epicontinental elastic substance, it result of tectonic hydrothermal alteration action, the hydrothermal could be from deep source. The content of Si, Al, Au, As, Sb remarkable enrichment, the ore-form element could be from lower crust or deeper source.

关 键 词：戈塘金矿 构造蚀变体(SBT) 地球化学 

分 类 号：P618.504[天文地球—矿床学]