摘要
云南巧家松梁铅锌矿床系滇川黔铅锌成矿域内赋存于震旦系灯影组白云岩中的富铅锌矿床,它严格受构造控制。文章在讨论矿床地质特征的基础上,选择Ⅰ号矿体1260中段36个断裂构造岩样品进行研究,认为NW向断裂带内铅锌矿脉的形成早于NE向顺层产出的铅锌矿脉,构造岩存在Zn-Pb-Fe、CaO-MgO-Na2O和Al2O3-K2O三种元素组合。Zn-Pb-Fe组合和CaO-MgO-Na2O组合呈负相关关系。前者为铅锌成矿作用的元素组合,后者代表了沉积作用和热液蚀变作用的复合产物;Al2O3-K2O元素组合反映了断裂作用产生的黏土矿物。微量元素分析结果表明,自矿体中心向外存在Zn-Cd-Ga、Pb-Ag-Ge元素分带,这对成矿预测具有重要意义。
Songliang Pb - Zn deposit, strictly controlled by faults, is located in the Sinian Dengying Formation in the Sichuan - Yunnan - Guizhou Pb - Zn mineralization district. Based on discussion of geology of Songliang Pb - Zn deposit, teetonite in the 1260m level in No. Ⅰ ore - body is chosen for study. According to multi - analysis of major and trace elements, it is shown that there were three element associations, Zn - Pb - Fe, CaO - MgO - Na2O and Al2O3 - K2O. Zn - Pb, - Fe association has negative correlation with CaO - MgO - Na2O association. The former represents Pb - Zn mineralization, and the latter may be related to sedimentation and hydrothermal alterations. There existed Zn - Cd - Ga and Pb - Ag - Ge element zonation from the eenter to the border of the ore - body according to trace element results.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第5期47-52,共6页
Geology and Exploration
基金
教育部新世纪优秀人才支持计划项目(编号:NCET-04-917)
企业委托项目(编号:2006-01)资助
