摘要
研究表明,本矿床原生晕基本特征为:(1)异常面积大,浓集中心包围各个含金角砾岩体;(2)组分复杂且具明显分带;(3)含矿角砾岩体及斑岩和复成分角砾岩Au含量高,Au在黄铁矿中含量最高;(4)不同剥蚀程度微量元素含量及其比值明显不同;(5)Au及其主要伴生元素呈(M—Cl)或(M—HS)形式迁移,并在降温减压、稀释作用及溶液由弱酸性向弱碱性转化的还原条件下按Mo、Cu、Au、Ag、Pb顺序发生沉淀,形成整个元素沉淀分带序列的主要格局。
Abstract:
Studies show that primary hatos of this ore deposit have the following characteristics; ( 1 ) anomalies cover a large area, and the concentration centers enclose all the auriferous breccia bodies; ( 2 ) the components are complex and show obvious zoning; ( 3 ) ore-bearing breccia and porphyry as well as compo-sitionally complicated breccia contain relatively abundant gold, which, however, is highest in pyrite; ( 4 )trace element contents and their ratios vary noticeably with the varying extent of denudation; (5 ) gold and major accompanying elements migrated in the form of CM-CD or [M-HS] and, under the reduction condition of falling temperature, decreasing pressure, dilution and conversion from weak acidity to weak alkalinity, elements precipitated in order of Mo, Cu, Au, Ag and Pb, forming the main framework of the element precipitation zoning.
出处
《物探与化探》
CAS
CSCD
1992年第6期433-444,共12页
Geophysical and Geochemical Exploration
