云南弥渡县云景地区多元地学信息集成及找矿模型  

Multi-Source Geological Information Integration and Ore-Prospecting Model in the Yunjing Area,Midu County,Yunnan Province

作　　者：缪宇 宋文婷 何茂源 徐乐 MIAO Yu;SONG Wenting;HE Maoyuan;XU Le(Kunming Natural Resources Comprehensive Investigation Center,China Geological Survey,Kunming,Yunnan 650001;China University of Geosciences,Beijing 100083;Yunnan Technology and Business University,Kunming,Yunnan 650001)

机构地区：[1]中国地质调查局昆明自然资源综合调查中心,云南昆明650001 [2]中国地质大学(北京),北京100083 [3]云南工商学院,云南昆明650001

出　　处：《地质与勘探》2019年第6期1367-1378,共12页Geology and Exploration

摘　　要：云南弥渡县云景预查区位于巍山县扎村金矿东缘,属于西南三江成矿省昌都-普洱成矿带。本文结合前人地质资料以及野外地物化遥等多元勘查手段,对该预查区多元地学信息进行分析和集成。研究发现,该区成矿作用与区内浅层侵入岩关系密切,接触交代成矿作用明显,矿化受南北向构造控制,构造交汇部位矿化集中发育。斑岩体构成了区内主要的磁性源,含矿石英砂岩体具有接触过渡带高阻、高极化率的特征,中深部找矿潜力巨大;地球化学异常特征表现为热液叠加改造型金矿的元素组合特征,亲铜元素相对富集,成矿阶段呈多期次性,金成矿贯穿早期高温热液成矿阶段。通过多元地学信息集成提出了适合本区的热液叠加改造型金矿找矿模型。The Yunjing reconnaissance area is located at the eastern edge of the Zhacun gold deposit in Weishan County,part of the Changdu-Puer metallogenic belt of the Sanjiang metallogenic province in southwest China.Based on existing data and surveys by many methods such as geology,geophysics,geochemistry and remote sensing interpretation,this paper analyses and integrates multi-source geological information of this pre-prospecting area.Study suggests that the mineralization is closely related to shallow intrusive rocks,with obvious contact metasomatic mineralization.The mineralization is controlled by N-S trending structures and concentrates at the intersection of structures.Porphyry rocks constitute the main magnetic source and ore-bearing quartz sandstone bodies have high resistance and high polarizability in the contact transition zone,implying great potential of prospecting at medium and large depths.Geochemical anomalies show the characteristics of hydrothermally overprinted and reworked type gold deposits with enriched chalcophile elements.It is inferred that the metallogenic process was multistage and the gold mineralization was throughout the early high temperature hydrothermal metallogenic stage.Based on the multi-source geological information integration,this work proposes an ore-prospecting model for hydrothermally overprinted and reworked type gold deposits in this area.

关 键 词：斑岩体 热液叠加改造型金矿 多元地学信息 找矿模型 云景预查区 弥渡县 云南 

分 类 号：P618.41[天文地球—矿床学]