河南罗山县母山钼矿热液蚀变研究

The Study of Hydrothermal Alteration in Mushan Molybdenum Deposit of Luoshan County, Henan Province

摘要: 母山钼矿是大别山北麓发现的第一个中型以上斑岩型钼矿床，对其热液蚀变类型、分带性和阶段性进行研究，为今后在该区勘查同类型矿床提供有益借鉴。本文是在对以往工作成果综合分析的基础上，通过野外对母山斑岩体进行大比例尺构造蚀变岩相填图，确定热液蚀变类型为硅化核、石英–钾长石化、石英–绢云母化、青磐岩化；并对热液蚀变分带性和阶段性及与矿化关系进行了总结，认为母山钼矿热液蚀变与成矿作用是多期和多阶段的，成矿期的蚀变主要为石英–钾长石化、石英–绢云母化和青磐岩化早期，而钼矿主要在石英–绢云母化期，铜矿在青磐岩化期。

Abstract: Moshan molybdenum deposit is the first medium-sized porphyry molybdenum deposit discovered in the north of Dabie Mountain. The types, zonation and stages of hydrothermal alteration are studied, which can be used for reference in the future exploration of similar deposits in this area. In this paper, based on the comprehensive analysis of previous work results, the author made a large scale of structural alteration lithofacies mapping of the Moshan porphyry mass in the field, and determined that the types of hydrothermal alteration were silicification core, quartz-potassium feldspathization, quartz-sericitization and propylitization. And zoning of hydrothermal alteration and periodic and relation with mineralization are summarized and this paper thinks that Moshan hill molybdenum hydrothermal alteration and mineralization are multiphase and multistage mineralization period of alteration is mainly quartz, potash feldspathization, quartz, sericitization and propylitization early, and molybdenum mainly in quartz, sericitization, copper in propylitization period.