湘黔桂地区浊积岩型金矿床的分布特征与成矿规律

Distribution characteristics and ore-forming regularities of turbidite-hosted gold deposits in Hunan,Yunnan and Guangxi

湘黔桂地区分布有大量浊积岩型金矿床,为确定本区浊积岩型金矿床的分布特征及成矿规律,系统分析了区域地质概况和区域金矿类型。研究结果表明,地层控矿具有全区域穿层成矿特征,局部岩性控矿的特点;由西南向北东方向,区域金成矿时代具有从加里东期向印支—燕山期趋新的时空分布特征;区域变形、变质程度作用对成矿作用强弱有较大影响。区域金矿田位于巨型推覆含金剪切断裂带中,大型金矿床一般都产在一级深大断裂旁侧的次级断裂中;多期成矿特征明显;并与岩浆岩的关系非常密切,金矿周围通常都有岩体的产出。

In order to make out the distribution characteristics and ore-forming regularities of turbidite-hosted gold deposits that widely exist in Hunan-Yunnan-Guangxi Region, general geological survey of the region and gold deposit types in it are systematically analyzed. The results show that in the perspective of ore-controlling strata,penetration ore forming occurs in regional scale and ores are controlled by lithology in the local; trending WS-NE, the mineralization goes younger from Caledonian to Indosinian-Yanshanian; gold fields in the region are located in huge push-over gold- bearing shear fault zones; the degree of deformation and metamorphism have fairly strong impacts on metallogenesis. Large-scale gold deposits usually occurs in secondary faults next to the primary deep fracture, has an evident feature of nmlti-stage mineralization and a close relation to magmatic rocks, there are usually rock bodies neighboring the gold deposits. The degree of deformation and metamorphism might have fairly strong impacts on metallogenesis in the region.