摘要
梳理过去几十年对滇东北地区铅锌(银)多金属矿的科学研究成果和找矿勘查经验发现,一些影响找矿突破的关键基础地质问题始终难以达成共识或长久未被解决。文章以"三位一体"找矿预测方法为指导,围绕成矿地质体、成矿构造及成矿作用特征标志等直接影响推测矿体(床)全部地质特征的内容进行系统论述,综合分析认为:滇东北地区主要产出以茂租铅锌矿为代表的层控型矿床和以乐红铅锌矿为代表的构造控矿型矿床,成矿地质体为高原陆核地体系统内的坳陷盆地,成矿构造主要为SN向深断裂带、NW向深断裂带及NE向深断裂所引起的次生构造,矿床成因与沉积及后期热液改造有直接关系,成矿时代主要集中在晚三叠世,成矿物质主要来源于震旦系碳酸盐岩地层,成矿机制为古特提斯向扬子板块西南缘俯冲驱动陆内盆地的热、气、液反复循环,不断改造-萃取-富集成矿。
Studies of the past few decades of research data and exploration experience about Pb-Zn-（ Ag）polymetallic deposit in northeast Yunnan indicate that there are several critical geological issues about prospecting breakthrough difficult to be understood and resolved. According to the ＂Geological Body-StructureMineralization＂ prospecting prediction method,the metallogenic geological body,ore-forming structure and mineralization characteristic indications can directly influence all geological features of the deposit. However,combined with previous opinions and the latest information,we proposed that there are two main kinds of Pb-Zn deposit discovered in the area,strata-bound and structure-controlling deposits. The metallogenic geological body was depression basin of plateau land system,and main ore-controlling structure were some secondary fractures caused by SN-NW-NE trending deep fault zone. It is considered that the genesis of deposit is closely related to sedimentary and epigenetic hydrothermal transformation,the mineralization ages of these deposits are mainly in the Late Triassic,the metallogenic material mainly originated from carbonate formation of Sinian System,and their metallogenetic mechanism can be concluded as followings,the subduction of the Paleo-Tethys ocean to the southwestern edge of the Yangtze plate caused the recycling action of hot,gas and hydrothermal fluid in intracontinental basin, which resulted in consist transforming, extraction and enrichment of metallogenic elements,and led to the polymetallic mineralization.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2016年第3期722-735,共14页
Journal of Jilin University：Earth Science Edition
基金
云南省科技创新人才计划(2013HA001)
国家重点基础研究发展计划(国家"973"计划)项目(2015CB452605)~~
关键词
铅锌(银)多金属矿床
关键基础地质
三位一体
滇东北
Pb-Zn-（Ag） polymetallic deposit
critical geology
geological body-structure-mineralization
northeast Yunnan
