内蒙古成堂地石墨矿区地质特征与找矿前景

Geological Characteristics and Prospecting Potential of the Chengtangdi Graphite Mining Area in Inner Mongolia

内蒙古成堂地石墨矿区位于华北地台北缘,阴山隆起东段,隶属晋冀蒙EW—NEE向高级变质岩区内。在分析成堂地石墨矿地质及地球物理特征的基础上,对其找矿标志进行了总结。研究表明:(1)石墨矿赋存于集宁群上段大理岩与片麻岩接触带的片麻岩一侧,石墨矿化与黄铁矿化关系紧密,地球物理特性主要表现为高极化、中高阻、中高时间常数和低频率相关系数,可作为找矿标志;(2)矿区含石墨片麻岩的地层分布广泛,石墨矿石量(334资源量)预计可达100万t,属大型晶质石墨矿,找矿前景较好。

Chengtangdi graphite mining area in Inner Mongolia is located in the northern margin of the North China Platform,the eastern part of Yinshan Uplift,it is belongs to EW-NEE trending advanced metamorphic rocks region in shanxi Province,Hebei Province and Inner Mongolia. Based on the geological working results and geophysical working results in the area,the geological characteristics and geophysical characteristics of the graphite deposit in the area are discussed,besides that,the favorable prospecting indicators of the mining area are summarized. The study results show that：（1）the graphite deposit is distributed near the side of gneiss of the contact zone of marble and gneiss of the Upper Section of Jining Formation,graphite mineralization is closely related to pyritization,the geophysical characteristics of the deposits is expressed as high polarization,medium-high resistance,medium-high time constant and low frequency correlation coefficient,the above characteristics can be taken as the favorable prospecting indicators in the mining area;（2） the graphite gneiss formation is widely distributed in the mining area,the graphite resources（ 334 resources） is bout 1 million t by prediction,the deposit genesis is belongs to crystalline graphite deposit with large scale,the prospecting potential of the mining area is good.