河南大华山金矿地质特征及找矿方向

Geological characteristics and prospecting direction of the Dahuashan gold deposit,Henan

大华山金矿位于毛堂—蒲塘金矿田东南部,矿床由两种工业类型金矿组成,即产于岩体内的斑岩—隐爆角砾型金矿和产于岩体外构造破碎带中的构造蚀变岩型金矿。该矿区以构造蚀变岩型金矿为主,这种类型的金矿在毛堂—蒲塘金矿田尚属首例。文章对区域地质背景、矿区及矿床地质特征、成矿因素进行了分析,认为构造控制了岩体和矿体的空间分布,成矿物质来源于岩浆热液,金矿的形成与燕山期岩浆活动有密切关系。通过对毛堂—蒲塘一带地质特征的分析研究,并与大华山金矿进行对比,认为该地区具有较好的成矿地质条件,指出了矿区及外围找矿有利地段。

The Dahuashan gold deposit is located in the southeast of the Maotang - Putang gold field. The ore can be divided in- to two types ： porphyry-cryptoexplosion breccia type occurring in intrusive rocks and tectonic altered rock type occurring in the struc- turally fractured zone outside of intrusive rocks. The latter is the main type in this diggings. This kind of gold deposit was found for the first time in the Maotang - Putang gold field. Based on the regional geological background, deposit geological characteristics and metal- ｜ogenie factors, the author integrates that the space distribution of rocks and ore bodies were controlled by structure ; metallogenic mate- rial derived from magmatie hydrothermal fluid;the metallogeny of gold has a close relationship with Yanshan magmatie activities. The geological characteristics of Maotang - Putang area was studied and compared with the Dahuashan gold metallogenic characteristics. It has good ore-forming geological conditions in region and author point out the favorable area.