贵州兴义大际山地区茅台组砾岩的的发现及其地质意义

A Discovery of the Conglomerate of the Maotai Formation and Its Geologic Implication at the Dajishan Area,Xingyi,Guihzhou

贵州兴义大际山地区的茅台组砾岩系首次发现和圈定,该砾岩及其下伏地层受喜早山期构造变动影响,产生断裂,褶曲及大面积的硅化蚀变带。在硅化黄铁矿化砾岩、角砾岩中,有钼铀矿及汞矿等内生热液矿产出。据此,首次确认我省存在喜山期成矿作用。在今后的工作中,需高度重视喜山期构造活动及其成矿作用,开阔视野,适时调整找矿思路和方向,以扩展找矿远景。

The conglomerate series of the Maotai Formation are firstly found out and defined at Dajishan area, Xingyi, Guizhou, the conglomerate and its underlying strata that are impacted by structural alteration at the Himalayan Stage generate fractures, folds and widespread alteration zones in silicification. Within silicified pyritized conglomerate and breccias, there have endogenous hydrothermal products as moluranite ores and mercury ores. Metallogenesis at the Himalayan Stage is confirmed at first hereby. In the follow - up works, structural movement and its mineralization at the earlier Himalayan Stage need to be thought highly of, and oreseeking reasons and orientation are adjusted in due course aiming at the expansion of the prospecting forecast.