青海牛苦头M2磁异常区地球物理特征与找矿预测

Geophysical characteristics and ore prospecting prediction of Niukutou M2 Magnetic anomaly area,Qinghai

牛苦头矿区位于祁漫塔格矽卡岩成矿带东段,为该成矿带重要的矽卡岩型铅锌多金属矿床。其包含3个磁异常区(M1磁异常区、M4磁异常区和M2磁异常区,亦为矿权区)。其中M1磁异常区和M4磁异常区为牛苦头矿权以探明储量的矿段,铅锌资源量可观,M1矿段已开采,而M4矿段目前已进入勘探阶段,M2磁异常区(矿权区)面积最大,目前已有少数钻孔见矿,然而成矿潜力依然不明。M2磁异常区第四系覆盖程度高,地层较厚,见矿深度大,因此仅仅依靠地质手段,找矿难度较大。本文以地质特征为基础,结合其航磁异常和MT特征,最终认为M2磁异常区西部56线、7线至15线、43线一带具有成矿潜力。

The Niukutou mining area is located in the eastern section of the Qimantag skarn mineralization belt,and is an important skarn type Pb-Zn polymetallic deposit in this mineralization belt.It includes three Magnetic anomaly areas(M1 Magnetic anomaly area,M4 Magnetic anomaly area and M2 Magnetic anomaly area,also known as mineral right area).Among them,M1 Magnetic anomaly area and M4 Magnetic anomaly area are the ore blocks of Niukutou mining area with proven reserves.The amount of Pb-Zn resources is considerable.M1 ore block has been mined,while M4 ore block has entered the exploration stage at present.M2 Magnetic anomaly area(mining area)has the largest area.At present,a few boreholes have seen ore,but the ore forming potential is still unknown.M2 Magnetic anomaly area is characterized by high Quaternary coverage,thick stratum and large depth of ore finding,so it is difficult to find ore only by geological means.Based on geological characteristics,combined with its aviation Magnetic anomaly and MT characteristics,this paper finally believes that the 56,7 to 15 and 43 lines in the west of M2 Magnetic anomaly area have metallogenic potential.