滇东北矿集区昭通铅锌矿区蚀变岩分带及元素迁移特征

doi:10.13278/j.cnki.jjuese.201603109

吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (3): 711-721.doi: 10.13278/j.cnki.jjuese.201603109

滇东北矿集区昭通铅锌矿区蚀变岩分带及元素迁移特征

陈随海^1,2, 韩润生¹, 申屠良义¹, 吴鹏¹, 邱文龙¹, 文德潇¹

1. 昆明理工大学国土资源工程学院/有色金属矿产地质调查中心西南地质调查所, 昆明 650093;
2. 昆明理工大学建筑工程学院, 昆明 650500

收稿日期:2015-10-07 出版日期:2016-05-26 发布日期:2016-05-26
通讯作者: 韩润生(1964-),男,研究员,博士生导师,主要从事构造地球化学及成矿预测、矿床学方面研究,E-mail:554670042@qq.com E-mail:554670042@qq.com
作者简介:陈随海(1971-),男,讲师,博士,主要从事构造地球化学及隐伏矿预测研究,E-mail:shc7135@126.com
基金资助:
国家自然科学基金项目（U1133602，40863002，41572060）；云南省自然科学基金重点项目（2010CC005）；国家危机矿山专项（20089943）；云南省矿产资源预测评价工程实验室（2010）；云南省地质过程与矿产资源创新团队（2010）；昆明理工大学重点实验室建设项目（2008）

Alteration Zoning and Geochemical Element Migration in Alteration Rock of Zhaotong Lead-Zinc Deposit in Northeastern Yunnan Mineralization Concentration Area

Chen Suihai^1,2, Han Runsheng¹, Shentu Liangyi¹, Wu Peng¹, Qiu Wenlong¹, Wen Dexiao¹

1. Faculty of Land and Resource Engineering, Kunming University of Science and Technology/South-West Institute of Geological Survey Centre for Nonferrous Metals Resources, Kunming 650093, China;
2. Faculty of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming 650500, China

Received:2015-10-07 Online:2016-05-26 Published:2016-05-26
Supported by:
Supported by the National Natural Science Foundation (U1133602, 40863002, 41572060);Main Program for the Natural Science Foundation of Yunnan Province (2010CC005);Special Exploration Program for National Crisis Mines(20089943);Projects of YMLab(2010) and Innovation Team of Yunnan Province (2010) and KMUST(2008)

摘要/Abstract

摘要：

围岩蚀变是昭通铅锌矿床的重要找矿标志。通过对矿区760中段98勘探线剖面实测、蚀变岩分带研究、岩石地球化学迁移特征与参数计算，指出围岩蚀变与成矿的关系：热液蚀变分带明显，在蚀变中心，黄铁矿化最强，方解石化、白云石化次之，硅化较弱，黄铁矿化与矿化关系密切；远离矿体，黄铁矿化逐渐减弱，而方解石化、白云石化逐渐增强。强黄铁矿化和强黄铁矿化-强方解石化-强硅化粗晶白云岩蚀变组合是重要的找矿标志。从细晶白云岩带到强黄铁矿化带，元素整体呈迁入形式，主要为与Zn-Pb成矿作用有关的元素，如Ge、Ag、Cd等迁入；同时伴随成矿流体作用，亲铁元素及铁明显富集，显示不同蚀变岩相受热液改造作用影响。蚀变指数（I_A）的大小，与矿化强弱呈正相关关系，I_A大，则矿化强。

关键词: 蚀变岩分带, 元素迁移, 昭通铅锌矿床, 滇东北矿集区, 会泽型铅锌矿床

Abstract:

Wall-rock alteration is one of the important ore-prospecting clues in the Zhaotong lead-zinc deposit. Based on the studies of the alteration zoning and element migration in altered rock of the No.98 profile line in the 760 m level of this deposit, we discussed the relationship between the alteration and the mineralization. There develops obvious hydrothermal alteration zonation, from the center of the ore body to outside, alteration gradually weakened. In the altered center, the pyritization is most intensive, followed by dolomitization and calcitization, and silicification is the weakest, and the pyritization is closely related to mineralization. Far away from the ore body, pyritization weakened gradually, calcitization and dolomitization increased gradually. The intensive pyritization and the intensive pyritization-calcitization-silicification coarse-grained dolomite alteration are important prospecting clues. From fine-grained dolomite zone to the intensive pyritization zone, such elements as Ge, Ag and Cd, which have a close relationship to Zn-Pb of ore-forming, migrate in as a whole. Meanwile, both iron and Pro iron elements markedly enriched accompanying by the ore-forming fluids elements, which indicates that different alteration facies were reformed by the hydrothermal fluids. The index of alteration(I_A) has the positive correlation with the alteration intensity.

Key words: alteration rock zoning, element migration, Zhaotong lead-zinc deposit, northeastern Yunnan mineralition concentration area, Huize type (HZT) Pb-Zn deposit

中图分类号:

P618.4

陈随海, 韩润生, 申屠良义, 吴鹏, 邱文龙, 文德潇. 滇东北矿集区昭通铅锌矿区蚀变岩分带及元素迁移特征[J]. 吉林大学学报(地球科学版), 2016, 46(3): 711-721.

Chen Suihai, Han Runsheng, Shentu Liangyi, Wu Peng, Qiu Wenlong, Wen Dexiao. Alteration Zoning and Geochemical Element Migration in Alteration Rock of Zhaotong Lead-Zinc Deposit in Northeastern Yunnan Mineralization Concentration Area[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(3): 711-721.

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滇东北矿集区昭通铅锌矿区蚀变岩分带及元素迁移特征

Alteration Zoning and Geochemical Element Migration in Alteration Rock of Zhaotong Lead-Zinc Deposit in Northeastern Yunnan Mineralization Concentration Area

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