多地质要素在金刚石找矿靶区研究中的应用

Application of Multiple Geological Methods in the Study of Diamond Prospecting

栏杆地区金刚石找矿比较成功。为了金刚石找矿新的突破,以地质、重力、航磁、地磁、化探和重砂等工作为基础,通过重力异常、航磁异常推测了深部基性超基性的分布和15条深部断裂构造。该地区地磁异常主要呈7个条带状分布,局部异常有110个;根据地球化学相容元素(Cr、Ni、Co、V等)和不相容元素(Nb、La、Y、Th等)圈出综合异常7处;通过重砂测量,根据金刚石、石榴子石(镁铝榴石)、锐钛矿、金红石、钛铁矿、磷灰石、锆石等矿物组合特征,圈定了12处重砂异常。通过综合研究分析,提取了有利成矿的构造部位、地磁异常区、化探异常区、重砂异常区等因素。圈定了靶区四处,其中A类靶区两处,B类靶区一处,C类靶区一处。

The diamond prospecting in Langan area is relatively successful.In order to make a new breakthrough in diamond prospecting,based on the work of geology,gravity,aeromagnetic,geomagnetic,geochemical exploration and heavy sand,the distribution of deep basic-ultrabasic and 15 deep fault structures were deduced through gravity anomaly and aeromagnetic anomaly.The geomagnetic anomalies in this area are mainly distributed in 7 bands,with 110 local anomalies.According to geochemical compatible elements(Cr,Ni,Co,V,etc.)and incompatible elements(Nb,La,Y,Th,etc.),7 comprehensive anomalies were delineated.According to the mineral assemblage characteristics of diamond,garnet,anatase,rutile,ilmenite,apatite and zircon,12 heavy sand anomalies are delineated by heavy sand survey.Through comprehensive research and analysis,the tectonic position,geomagnetic anomaly area,geochemical exploration anomaly area and heavy sand anomaly area which are favorable for mineralization are extracted.Four target areas are delineated,including two Class A target areas,one Class B target area and one Class C target area.