安徽宣城地区矿床成矿模型的构建及找矿方向  

METALLOGENIC MODELING AND PROSPECTING TARGETS IN THE XUANCHENG AREA,ANHUI PROVINCE

作　　者：孙明明[1] 杜建国[1] 吴礼彬[1] 赵先超[1] 王利民[1] 陈静静 高曙光[1] SUN Ming-ming;DU Jian-guo;WU Li-bin;ZHAO Xian-chao;WANG Li-min;CHEN Jing-jing;GAO Shu-guang(Institute of Geological Survey of Anhui Province,Hefei,Anhui 230001,China)

机构地区：[1]安徽省地质调查院,安徽合肥230001

出　　处：《安徽地质》2021年第1期8-13,共6页Geology of Anhui

基　　金：中国地质调查局中国矿产地质志项目“中国矿产地质志·安徽卷”(编号:DD20190379-13)资助。

摘　　要：通过系统梳理研究区31处矿床的勘查资料和科研资料,系统厘定了该区内生型矿床的矿床类型划分方案。在研究矿床的时空分布规律、成矿控制条件的基础上,对宣城地区区域成矿规律进行总结,首次构建了受燕山期构造-岩浆活动及沉积岩建造复合控制的矿床成矿模型。研究区内生矿床多与燕山中期形成的壳幔混源型中酸性高钾钙碱性侵入岩有关,次为燕山晚期形成的壳幔混源型钙碱性-碱性岩有关;矿体主要定位于侵入岩与石炭系—三叠系碳酸盐岩地层的接触带附近,受中生代断陷盆地内的基底隆起带控制。根据研究区成矿规律研究成果,明确了今后找矿工作的有利地段,为宣城地区矿产资源规划的编制和已知矿床深部及外围的矿产资源调查,提供了科学依据。Through systematical analysis of the exploration and scientific research data of 31 deposits in the study area,a classification scheme of endogenetic deposits in this area is thus determined.On the basis of studying the temporal and spatial distribution of deposits and metallogenic control conditions,the regional metallogenic regularities for the Xuancheng area are summarized,and a model of joint ore control by the Yanshanian tectonic-magmatic activity and sedimentary rock formation is established for the first time.The endogenetic deposits in the study area are mostly related to the crust-mantle mixed-sourced intermediate-acid high-potassium calc-alkaline intrusive rocks formed in the middle Yanshanian period,and secondarily to the crust-mantle mixed-sourced calc-alkaline rocks of the late Yanshanian period.The ore bodies are mainly located near the contact zone between the intrusive rocks and the Carboniferous-Triassic carbonate rocks,and controlled by the basement uplift belt in the Mesozoic fault basin.According to the research results of metallogenic regularity of the study area,the favorable areas for future prospecting work are defined,which provides a scientific basis for mineral resources planning and the investigation of mineral resources in the deep and peripheral areas of known deposits in the Xuancheng area.

关 键 词：宣城地区 矿床类型 成矿特征 时空分布 控矿条件 成矿模型 找矿方向 

分 类 号：P581[天文地球—岩石学] P584[天文地球—地质学]