西藏努日钨铜多金属矿床位于冈底斯火山—岩浆弧构造带东段南缘,是一个探明的大型矽卡岩型矿床.本文以该矿床的东部远景区为研究区,采用激电和地面高精度磁测的综合物探方法对该区的深部结构进行探测,通过钻孔验证找到1处钨铜多金属隐伏矿体.结合以上成果,建立出该区的地质—地球物理找矿模型.得出以下主要结论:高磁(或磁异常梯度带)+高充电率带+中—低电阻率带可作为努日式矽卡岩型钨铜多金属矿的找矿标志,利用综合物探找矿方法在覆盖区内寻找矽卡岩型铜钨钼矿体的综合物探方法是可行的.
Nuri tungsten copper polymetallic deposit in Xizang is located in the southern margin of the eastern segment of Gangdise volcanic magmatic arc tectonic belt.It is a proven large-scale skarn deposit.This article takes the east prospective area of the deposit as the research objective and adopts a comprehensive geophysi-cal method of induced polarization and high-precision ground magnetic survey to image the deep strucrure sit-uated.Through drilling hole verification,a hidden tungsten copper polymetallic ore body is found.Com-bined with the results,the geological-geophysical prospecting model in this study area are established.The main conclusions are as follows:The high magnetic(or magnetic anomaly gradient zone)+ high charging rate zone + medium low resistivity zone can be used as prospecting indicators for Nuri skarn type tungsten copper polymetallic deposit.The comprehensive geophysical exploration method to search for skarn type cop-per tungsten molybdenum deposit in the coverage area is feasible.