摘要
山东省南墅地区是我国优质的大鳞片晶质石墨生产基地,矿床成因类型为沉积变质型晶质石墨矿床,赋存于古元古代荆山群陡崖组徐村段内,虽经过几十年的开发利用,仍有较大的资源潜力。通过对区内采集岩矿石标本进行物性测试,结果表明含石墨矿石相对围岩具有明显的低阻高极化特征,选用激发极化法在南墅地区晶质石墨找矿中进行物探测量,以激电中梯测量圈定异常平面展布,以激电测深测量了解异常深部形态特征。以视极化率7%作为异常下限,全区共圈定10处极化率异常,均位于低阻区,部分异常进行了槽探揭露,其他异常地表也可见采坑、石墨露头等,在排除了硫化物、水等的影响后,推测均为矿致异常,为圈定石墨矿体及找矿靶区提供了依据,取得了较好的找矿效果。
The Nanshu area of Shandong province is an important base producing high quality large scale crystalline graphite in China.The genetic type of mineral deposits is sedimentary metamorphic crystalline graphite deposit,hosted in Xucun section of Douya formation,Jingshan group,Paleoproterozoic.After decades of development and utilization,there is still great potential for resources.Through the physical property test of rock samples collected in the area,the results show that the rock containing graphite exhibits a low resistivity and high polarization characteristic compared to surrounding rocks.The induced polarization method had been chosen for the prospecting of the crystalline graphite in the Nanshu area.In the process of prospecting,the abnormal plane characteristics is delineated by IP middle gradient,and the deep characteristics is delineated by IP depth sounding.Take the apparent polarizability of 7%as the lower limit of anomaly,ten apparent polarizability anomalies were outlined in the survey area,all of those anomalies were in low resistance area.Some of the anomalies were exposed by trenching.Pit and graphite outcrop can be seen on other abnormal surface.Excluding the influence of sulfide,water,etc,all of which are identified as ore-caused anomaly.It provided a basis for the delineation of the graphite ore body and the prospecting target area.The result shows that the induced polarization method can achieve better prospecting effects in the exploration of crystalline graphite.
作者
冀鲁雪
牟路路
张南
崔乐航
韩兰臻
JI Lu-xue;MU Lu-lu;ZHANG Nan;CUI Le-hang;HAN Lan-zhen(Shangdong Branch of China National Geological Exploration Center of Building Materials Industry,Jinan 250100,China)
出处
《中国非金属矿工业导刊》
2020年第3期46-50,共5页
China Non-Metallic Minerals industry
关键词
激发极化法
晶质石墨
激电中梯
激电测深
induced polarization method
crystalline graphite
IP middle gradient
IP depth sounding
