青海省都兰县乌拉斯太沟口金矿区地质特征及找矿前景

Geological Characteristics and Prospecting Prospect of Wulasitaigoukou Gold Deposit in Dulan County of Qinghai Province

对乌拉斯太沟口已发现的金矿点及金矿化带进行区域成矿地质条件、矿区地质特征、矿体特征及矿石特征进行分析研究。认为区内含矿蚀变带与NW,NWW向断裂成矿关系密切;NW,NWW向断裂为区内的主要导矿、控矿构造;其构造拐弯或膨胀处以及次级构造为重要的容矿构造;强烈的印支期岩浆活动,剧烈的构造运动为金元素的活化、迁移、富集、沉淀提供了通道和成矿空间;矿床成因类型为构造蚀变岩型;毒砂、硅化、构造蚀变带等标志是该区的主要找矿标志。结合巴隆岩金矿床特征与区域上已发现的矿点综合分析,认为该区有着良好的找矿前景。

Regional metallogenic geological conditions, geological characteristics, ore body characteristics and ore characteristics of already found gold deposits and gold mineralization belts in Wulasitaigoukou area have been analyzed and studied in this paper. It is regarded that ore - bearing alteration belts have close re- lation with metallogenic fault belts with the trend of NW and NWW. Faults with the trend of NW and NWW are main ore guided and ore - controlling faults. The bending, expansion and secondary structures are important ore - bearing structures. Strong Indosinian magmatic activity and tectonic movement will provide channels and mineralization space for activation, migration, enrichment and precipitation of gold element. Genetic type of the deposit is tectonic alteration rock type; while arsenopyrite, silicification and tectonic alteration are major prospecting marks. Combining with comprehensive analysis of Pakistan Longyan gold deposit characteristics and already found gold ore spots in this region, it is believed that this mine area has good prospecting prospect.