安徽当涂后钟山铁矿成矿地质特征及矿床成因分析

Metallogenic geological characteristics and genesis of the Houzhongshan iron deposit in Dangtu,Anhui

后钟山铁矿床位于长江中下游成矿带宁芜火山岩盆地南段钟姑矿田北部,为一热液交代充填成因的铁矿床。后钟山铁矿床的矿体主要产于闪长玢岩与三叠系中统黄马青组、周冲村组接触带附近,基底断裂、侵入接触带、背斜构造共同控制了矿体的产出。本文分析了后钟山铁矿的成矿地质条件、矿化特征及成因,探讨了找矿方向,以期指导区内铁矿深部勘查工作。

The Houzhongshan iron deposit is located in the northern part of the Zhonggu ore field in the south section of the Ningwu volcanic rock basin in the middle and lower reaches of the Yangtze River metallogenic belt,which is an iron deposit of hydrothermal metasomatism and filling origin.The ore bodies occur near the contact zone between dioritic porphyrite and the Huangmaqing Formation and Zhouchongcun Formation in the middle Triassic.The basement fault,intrusive contact zone and anticline structure jointly control the occurrences of the ore bodies.This paper analyzes the ore-forming geological conditions,mineralization characteristics and genesis of the deposit and discusses the prospecting direction for guiding exploration in the depth of the area.