[1]张建明,肖涛,程培生,等.庐枞盆地北东缘西湾铅锌矿床原生晕地球化学特征及其对矿体圈连的指示意义[J].华东地质,2021,42(03):350-358.[doi:10.16788/j.hddz.32-1865/P.2021.03.012]
　ZHANG Jianming,XIAO Tao,CHENG Peisheng,et al.Geochemical characteristics of primary halo of Xiwan lead-zinc deposit, northeastern margin of Luzong Basin and its significance to orebody delineation[J].East China Geology,2021,42(03):350-358.[doi:10.16788/j.hddz.32-1865/P.2021.03.012]
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庐枞盆地北东缘西湾铅锌矿床原生晕地球化学特征及其对矿体圈连的指示意义()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
42
期数:
2021年03期
页码:
350-358
栏目:
矿产地质
出版日期:
2021-10-20

文章信息/Info

Title:
Geochemical characteristics of primary halo of Xiwan lead-zinc deposit, northeastern margin of Luzong Basin and its significance to orebody delineation
作者:
张建明1;  肖涛2;  程培生1;  王芝水1;  李壮1;  杜东旭1
1. 安徽省勘查技术院, 安徽 合肥 230031;
2. 江西省地质矿产勘查开发局物化探大队, 江西 南昌 330009
Author(s):
ZHANG Jianming1;  XIAO Tao2;  CHENG Peisheng1;  WANG Zhishui1;  LI Zhuang1;  DU Dongxu1
1. Anhui Institute of Exploration Technology, Hefei 230031, Anhui, China;
2. Geophysical and Geochemical Exploration Brigade, Bureau of Geology and Mineral Exploration and Development of Jiangxi Province, Nanchang 330009, Jiangxi, China
关键词:
原生晕; 地球化学异常; 轴向分带; 指示元素; 矿体圈连; 西湾铅锌矿床
Keywords:
primary halo; geochemical anomaly; axial zoning; indicator element; orebody delineation; Xiwan lead-zinc deposit
分类号:
P618.42P618.43
DOI:
10.16788/j.hddz.32-1865/P.2021.03.012
摘要:
西湾铅锌矿床位于长江中下游成矿带庐枞盆地北东缘，其赋矿围岩破碎溶蚀现象明显，地层和矿体产状难以辨识。为了准确圈连矿体，以原生晕地球化学特征研究为基础，以热液矿床原生晕找矿理论为指导，通过对西湾矿区钻孔岩石光谱样品进行测试，绘制原生晕剖面等值线图，研究原生晕浓度分带和轴向分带特征，探讨原生晕地球化学特征及其对矿体圈连的指示意义。聚类分析和因子分析发现，As、Sb、Pb、Zn、Ag、Mo与铅锌矿成矿关系密切。16号勘探线原生晕浓度分带和轴向分带特征表明：前缘晕指示元素为As、Sb，近矿晕指示元素为Pb、Zn、Ag，尾晕指示元素为Mo；轴向分带特征反映Ⅲ号矿体具"反分带"现象。轴向分带和指示元素的变化特征说明，西湾铅锌矿床成矿作用复杂，推测为多期次成矿或矿体沿倾向还有延伸。As、Sb、Pb、Zn、Ag、Mo的浓度分带特征对矿体的圈连具有较好的指示意义。
Abstract:
Xiwan lead-zinc deposit is located in the northeaster margin of Luzong Basin, the Middle-Lower Yangtze metallogenic belt. It is difficult to identify the occurrence of strata and orebodies because of the heavy destroyed and corroded ore-bearing rocks. Therefore, in order to accurately delineate the orebodies, the primary halo geochemical characteristics are studied following the primary halo prospecting theory of hydrothermal deposits. Samples are collected from the boreholes of the No. 16 exploration line in Xiwan mining area, the contour map of the primary halo profile is drawn according to the spectral test results, the concentration zoning and axial zoning characteristics of the primary halo are distinguished and their indicative significance to delineating and connecting the orebodies are also discussed. Cluster analysis and factor analysis based on those different characteristics suggest that As, Sb, Pb, Zn, Ag and Mo are closely related to lead-zinc mineralization. Research on concentration zoning of primary halo in Xiwan lead-zinc deposit reveals that the front halo is indicated by As and Sb, the near-ore halo is indicated by Pb, Zn and Ag, and the tail halo is indicated by Mo. The axial zoning characteristics of primary halo reflect that the No.Ⅲ ore bodies which shows features of "reverse zoning". The change of the axial zoning and indicator elements indicate that the mineralization of Xiwan Pb-Zn deposit is complex, which is speculated to be multi-stage mineralization or orebody extendalong the trend. Furthermore, zoning characteristics of concentrations of As, Sb, Pb, Zn, Ag and Mo have objective and intuitive significance for the delineation and connection of the orebodies.

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备注/Memo

备注/Memo:
收稿日期:2020-09-11;改回日期:2021-01-25。
基金项目:安徽省地质勘查基金"无为县西湾铁多金属矿普查（编号：2012-1-4、2015-2-4、2018-1-Ⅰ）"项目资助。
作者简介:张建明,1982年生,男,高级工程师,主要从事固体矿产勘查及地球化学勘查工作。Email:370165191@qq.com。
更新日期/Last Update: 1900-01-01