安徽西坞口矿区典型锡(钨)铷矿床成矿要素及成矿模式分析  

Analysis of Metallogenic Elements and Metallogenic Models of Typical Tin(Tungsten)Rubidium Deposits in Xiwukou Mining Area,Anhui

作　　者：庾江华[1] 黄涛[1] 张吉生[1] 李凯[1] YU Jianghua;HUANG Tao;ZHANG Jisheng;LI Kai(322 Geological Team of Anhui Provincial Bureau of Geology and Mineral Exploration)

机构地区：[1]安徽省地质矿产勘查局322地质队

出　　处：《现代矿业》2022年第4期45-49,共5页Modern Mining

摘　　要：江南造山带北东端是安徽省皖南地区锡、钨多金属富集带,分布于沉积盖层褶皱带内,主要产出于西坞口背斜内重要南华系休宁组、南沱组赋矿地层中。为了查明控矿构造、矿床类型及矿体富集规律等,通过对西坞口花岗斑岩体进行岩石地球化学分析、锆石LA-ICP-MSU-Pb定年及Hf同位元素测试分析,认为其属于高温岩浆热液型矿床,断裂构造对西坞口矿区燕山晚期酸性花岗斑岩的侵位和岩浆期后气水热液运移活动起着决定性控制作用。西坞口岩体为成矿提供了主要的矿质来源,高温岩浆与围岩发生交代,萃取围岩中的成矿元素,后期形成矿体。The northeastern end of Jiangnan orogenic belt is a tin and tungsten polymetallic enrich⁃ment zone in southern Anhui Province,which is distributed in the fold belt of sedimentary cover,and mainly occurs in the ore-bearing strata of the important Nanhua Xiuning and Nantuo Formations in the Xi⁃wukou anticline.In order to find out the ore-controlling structure,deposit type and ore body enrichment regularity,it is considered to be a high-temperature magmatic hydrothermal deposit through rock geochem⁃istry analysis,zircon LA-ICP-MS U-Pb dating and Hf isotope test analysis of Xiwukou granite porphyry.The fault structure plays a decisive role in controlling the emplacement of acid granite porphyry in late Yan⁃shanian and the gas-water hydrothermal migration after magmatic period in Xiwukou mining area.The Xi⁃wukou rock mass provides the main ore source for mineralization.The high temperature magma alternates with the surrounding rock,extracts the ore-forming elements in the surrounding rock,and forms the ore body later.

关 键 词：成矿要素 云英岩脉 岩体型锡矿床 云英岩型铷矿床 

分 类 号：P618.44[天文地球—矿床学] P618.67[天文地球—地质学] P618.77