内蒙古正镶白旗—正蓝旗银成矿地质条件及远景预测

Study on Metallogenic Geological Conditions and Prospect Prediction at a Silver Ore in Zhengxiangbai Banner-Zhenglan Banner,Inner Mongolia

内蒙古正镶白旗—正蓝旗地区成矿地质条件优越,但地质工作程度较低,具有较大的找矿潜力。区内出露地层主要有下二叠统三面井组上岩段和上侏罗统张家口组三岩段,其银含量较高。区内火山活动频繁且强烈,火山岩分布,火山期后热液活动与火山作用有关的构造、次火山岩体及其富含的大量挥发分,均对银等多金属的活化、迁移和富集起着重要作用,对矿床分布具有一定的控制。根据研究区银成矿地质条件,银矿(化)点的地质特征及分布规律,划分出2处银成矿远景区,指出应主要寻找火山热液—斑岩型和石英脉型银矿。因此,重视并加强火山岩区成矿条件的研究,对推动该区火山岩内银矿找矿工作具有一定的意义。

Although the high degree of geological conditions at the Zhengxiangbai Banner-Zhenglan Banner region,geological work was at low level with great prospecting potential.It presented the lower Permian Sanmianjing Group upper rock section and the upper Jurassic Zhangjiakou Group three rock section,and the silver content was higher.Due to the violent volcanic eruption,the structure of the hydrothermal activities related to volcanism during later volcanic period,volcanic rock and contains showed a large amount of volatiles,which played an important role in activation,migration and enrichment of silver and other metals.On this basis, according to the research area of silver and silver point of geological characteristics distribution laws and the metallogenic geological conditions,the region was divided into two silver metallogenic prospect areas.Therefore, strengthen the study of the metallogenic conditions of volcanic rock was meaningful to promote silver ore prospecting in volcanic rocks.