东昆仑东段浪木日锰镍多金属矿产勘查中的物探技术应用及研究

An Application and Research of Geophysical Exploration Technology in Langmuri Manganese-Nickel Polymetallic Mineral Exploration in the East Section of East Kunlun

浪木日成矿区位于东昆仑东段之昆中断裂以北,区内铁质-超镁铁质杂岩体出露,且金属硫化物发育,具有较好的镍多金属成矿潜力。物探异常显示,正负伴生高磁异常区多由超基性岩体引起,异常值一般在-1200~+2500 nT,而含镍超基性岩体多表现为低阻高极化异常,因此,以高磁-低电阻率-高极化率物探异常组合为特征,可作为镍多金属矿的找矿标志。锰矿床属沉积变质型矿床,经变质作用形成硅酸锰,主要以层状蔷薇辉石为主,近地表处氧化形成氧化锰,以正磁-高电阻率-高极化率物探异常组合为特征,可很好地指示区内锰矿找矿方向。

Langmuricheng mining area is located in the north of Kunzhong fault in the east section of East Kunlun.The iron-ultramafic complex is exposed and metal sulfide develops in the area,which has good nickel polymetallic ore-forming potential.The geophysical anomaly shows that the positive and negative associated high magnetic anomaly areas are mostly caused by ultrabasic rock mass,whose anomaly value is generally between-1200 nT and+2500 nT,while the ultrabasic rock mass containing nickel is mostly characterized by low resistivity and high polarization anomaly.Therefore,the combination of high magnetic,low resistivity and high polarization geophysical anomaly can be used as the prospecting mark for nickel polymetallic ore.Manganese ore deposit is a sedimentary metamorphic deposit,forming manganese silicate through metamorphism.It is mainly composed of layered rosacene,oxidizing to form manganese oxide near the surface.It is characterized by the combination of positive magnetic,high resistivity and high polarization geophysical anomalies,which can well indicate the prospecting direction of manganese ore in the area.