安徽省霍邱铁矿成矿特征及构造控矿的深部找矿意义

Metallogenic features and deep exploration implications of the structurally controlled Huoqiu iron ore deposit,Anhui Province

安徽霍邱铁矿是一个大型BIF铁矿田,矿体均赋存于一套晚太古代中高级变质作用的含铁建造,为南北向海槽条带状硅铁建造,大地构造位置位于嵩箕-砀山古陆核南缘东西向凹陷区。主要矿体自下而上可分为A+B矿带和D矿带:前者为变粒岩-片岩-磁铁石英岩建造;后者为片岩-大理岩-赤铁(镜)铁石英岩建造。本文对该矿田的地质背景、矿体赋存条件、构造型式进行深入分析,推测矿区周边及深部构造与控矿因素,综合相关地质情况,我们推测其周边还可能存在新的隐伏矿床,该研究对霍邱铁矿的外围成矿规律研究与找矿预测具有参考价值。

The Huoqiu iron ore deposit, Anhui is a big BIF iron ore field, where ore bodies are all hosted in late Archae- an high-grade metamorphic iron formation, NS-trending trough banded ferrosilicon formation, tectonically located in an EW sag at the southem fringe of the Songji-Dangshan Old Nuclei. Major ore bodies are found from bottom to top in A＋B zone and D zone, the former being granulite-schist-magnetic quartzite formation, and latter schist-marble-hematite （specularite） quartzite formation. This paper made an in-depth analysis of geological setting, ore body occurrence conditions and structural pattern, inferred structure and ore-control factors in the periphery of the mine and depth. With all relevant geological conditions being taken into consideration, we think that there probably is a new hidden ore deposit in the surrounding area.