高精度磁测在青海省都兰县起次日赶特地区铜镍矿预查区的应用

An Application of High Precision Magnetic Survey in Copper and Nickel Mine Pre-investigation area in Dulan County of Qinghai Province

对高精度磁测在青海省都兰县起次日赶特地区铜镍矿预查区的应用进行了研究分析。通过在预查区内开展1/10 000高精度磁测扫面,共圈出了8处ΔT异常(带)。在C4异常带发现了品位较高的铅锌矿体;在其它磁异常地段和地表见矿化线索的地段发现了多处磁、电异常或磁、电异常套合较好的综合异常,为槽探工程部署提供了有力证据;在磁异常中心、磁、电剖面线上的地表露头及探槽内采集标本,测定了5种物性参数,了解了不同岩性之间的物性差异,为解释异常及今后选用物探方法提供了依据。

The application of high precision magnetic survey in copper and nickel deposit pre-investigation area in Dulan County of Qinghai Province is studied and analyzed.A total of 8ΔT anomalies(bands)have been obtained by conducting 1/10 000 high precision magnetic scanning surfaces in the pre-check area.High grade lead-zinc ore bodies were found in C4 anomaly zone.Many comprehensive anomalies of magnetic,electric or magnetic anomalies have been found in other magnetic anomaly areas where mineralization cues are found on the surface.It provide strong evidence for the deployment of trench exploration projects.The surface outcrops and grooves in the center of magnetic anomalies,and magnetic and electric profiles were collected.Five physical parameters were measured and different lithology was understood.The difference of physical properties between them provides a basis for the interpretation of anomalies and the selection of geophysical prospecting methods in the future.