摘要
郎溪县姚家塔萤石矿是皖南萤石成矿带内代表性的萤石矿床之一。本文对姚家塔萤石矿开展了矿床地质特征及成岩成矿时代研究。结果表明:姚家塔萤石矿受北东向断裂构造控制,矿体沿北东向断裂充填,具有两个阶段成矿特征,早期以结晶紫色萤石为主,晚期以绿色萤石为主,矿石以萤石型和石英-萤石型为主;围岩蚀变有硅化、绢云母化、高岭土化和伊利石化等,为中-低温热液充填型萤石矿;成矿时代为(98±19)Ma,明显晚于姚村岩体形成时代(约127 Ma),指示该矿床为岩浆期后热液成矿。
The Yaojiata fluorite deposit in Langxi County is a representative fluorite deposit in the fluorite metallogenic belt in southern Anhui.This paper delves into the geological characteristics,diagenetic and metallogenic ages of the deposit and reveals that it is controlled by the NE-trending faults,and the ore bodies occur along these faults,exhibiting two distinct ore-forming stages:the early stage of crystallization of purple fluorite,and the late green fluorite.The predominant ore types are fluorite and quartz-fluorite,with wall rock alterations of silicification,sericite,kaolinization and illitization.As a middle-and low-temperature fissure-filling hydrothermal deposit,it formed at(98±19)Ma,significantly later than the Yaocun rock mass(ca.127 Ma),indicating post-magmatic hydrothermal mineralization.
作者
马良
李加好
贾国庆
魏国辉
MA Liang;LI Jiahao;JIA Guoqing;WEI Guohui(Public Geological Survey Management Center of Anhui Province,Hefei,Anhui 230091,China;School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,Anhui 23009,China;Geological Survey of Anhui Province(Institute of Geological Sciences of Anhui Province),Hefei,Anhui 230001,China)
出处
《安徽地质》
2024年第3期197-202,共6页
Geology of Anhui
基金
安徽省自然资源科技项目“皖南地区萤石矿地质成矿特征及找矿方向研究”(编号:2023-K-14)
安徽省公益性地质工作项目“安徽宣城地区萤石矿资源调查评价项目”(编号:2021-g-1-3)联合资助。
关键词
皖南
萤石矿
姚村岩体
SM-ND同位素
southern Anhui
fluorite deposit
Yaocun rock mass
Sm-Nd isotopes
