地-井五方位TEM在新疆东天山月牙湾铜镍矿床勘查中的应用  

Application of five-direction borehole TEM in the exploration of Yueyawancopper-nickel deposit in East Tianshan, Xinjiang

作　　者：刘洋 徐飞 柯国秋 尹志超 LIU Yang;XU Fei;KE Guoqiu;YING Zhichao(Sino-GT Geophysical Technology(Beijing)Co.,LTD.,Beijing 100012,China)

机构地区：[1]中色杰泰地球物理科技(北京)有限公司,北京100012

出　　处：《矿产勘查》2023年第9期1676-1682,共7页Mineral Exploration

基　　金：国家重点研发计划“北方增生造山成矿系统的深部结构与成矿过程”专题“卡拉塔格矿集区VSM型成矿系统三维地质结构与矿体定位”(2017YFC0601201-2)资助

摘　　要：月牙湾铜镍矿床具有典型的“三高一低”(高磁、高重、低阻、高极化)异常组合特征,以往地面物探工作取得了较好的找矿效果,但受限于此区所处的低电阻率背景,存在探测深度小或者深部分辨率不足的问题。为了解矿体在深部的延伸情况,本文选择在见矿钻孔中开展地-井五方位TEM探测试验,与地面测深方法相比有较好的异常细节。试验结果表明,地-井五方位TEM方法在井旁盲矿探测、矿体延伸推断均有较好的应用效果,值得在后续地质勘查中推广应用。The Yueyawan copper-nickel deposit is characterized by a typical combination of"three high and one low"(high magnetic,high weight,low resistivity and high polarization)anomalies.Previous ground geophysi⁃cal exploration has achieved good prospecting results,but limited by the low resistivity background in this area,there are problems such as small exploration depth or insufficient deep resolution.In order to understand the exten⁃sion of the ore body in the deep,this paper chooses to carry out the ground-well TEM detection test in the orefinding borehole,which has better abnormal details compared with the surface method.The test results also show that the ground-well TEM method has good application effect in blind mine detection and orebody extension infer⁃ence,and is worthy of popularization and application in subsequent geological exploration.

关 键 词：地-井五方位瞬变电磁法 铜镍矿床 月牙湾 东天山 

分 类 号：P631.3[天文地球—地质矿产勘探]