花石山金矿床特征及找矿前景分析

产于震旦-奥陶系葫芦河群石嘴组地层之断裂破碎带中的花石山构造(热液)蚀变岩型金矿,矿床规模已达中型.矿石以含金石英脉型及构造蚀变岩型为主,褐铁矿、黄铁矿是主要的载金矿物.围岩蚀变以硅化、褐铁矿化、黄铁矿化、绢云母化为特征.海相沉积岩及中酸性火山岩、脆韧性断裂构造、中酸性岩浆侵入"三位一体"是控制矿床形成的基本条件.区内成矿条件优越,具有形成大型金矿的可能性,近东西向断裂蚀变延伸带是寻找金矿的有利地段.

The Features of Gold Ore Deposit and Analysis of Ore-Searching Prospect in Huashi Mountain

Huashishan(Huashi Mountain) tectonic(hydrothermal) altered-rock gold ore deposit is a medium-sized scale deposit that located within the faulted-fracture zone in the Shizui formation of Hulu River group of Sinian-Ordovician age.The ore mainly includes two components: auriferous quarts and tectonic altered-rock.Limonite and pyrite are the major gold-carrier in the mineral.The features of wall-rock alteration are silication,limonitization,pyritization and sericitize.The basic conditions of ore deposit-forming is controlled by the "tri-unity" which are marine sedimentary rock and inter mediate-acid volcanic rock,brittle-ducltile faulted structure as well as intermediate-acid magmatic intrusion.It is possible to form massive gold ore while the ore-forming condition is better in the region.The faulted-altered-extension zone is a more favorable place for searching gold-ore deposit along the east-west trending.