河南商城县木厂河银多金属矿区成矿地质特征及成矿规律

METALLOGENIC GEOLOGICAL CHARACTERISTICS AND METALLOGENIC LAWS OF MUCHANGHE Ag-POLYMETALLIC MINING AREA,SHANGCHENG COUNTY,HENAN PROVINCE

木厂河银多金属矿区位于中央造山带东部桐柏—大别构造亚带东段,本区经历了多期次构造、岩浆活动,为银多金属矿床的形成提供了有利条件。矿体的形成受地层、构造、岩浆岩及物化条件等综合控制。通过对地质、矿床特征、控矿因素的分析研究,总结出了在该区找矿具构造、蚀变、矿物标型、铁帽、植被及民采等重要找矿标志,提出了矿床、矿体赋存规律、矿脉组构、矿物共伴生组合及蚀变组合等五大规律。

Located in the eastern part of Tongbai - Dabie tectonic belt, the Muchanghe Ag - polymetal mining area is in the east of central orogenic belt. This area has undergone several episodes of structural and magmatic activities, which provides the comfortable conditions for the formation of Ag - polymetallic ore deposit. The formation of ore bodies is controlled by stratum, structure, magmatic rocks,physical- chemical conditions and so on. In this paper, the authors discussed some important ore indicators such as structure, alteration, specific minerals, gossan, plant and the old sap of mining. They also sum up five metallogenic laws in the area, including the occurrence of ore deposit and ore bodies, the component and structure of lode, combination of different minerals and alteration.