新疆坡北基性-超基性岩带1号岩体地质特征及其含矿性研究

坡北1号岩体是幔源基性岩浆以深部分异多次侵入和结晶分异两种方式形成的基性-超基性复式岩体。该岩体属于橄榄辉长岩—橄榄单辉岩—单辉橄榄岩型,规模较大,分异良好,地表发现铜镍硫化物矿化带。与国内已知含矿岩体对比,1号岩体的类型、岩石化学特征、有用组分含量和地表矿化特征都在含铜镍硫化物矿体的变化范围之内。物探测量结果显示深部存在低阻高激化体。因此,1号岩体是坡北岩带中寻找铜镍硫化物矿床远景很好的岩体。

GEOLOGICAL CHARACTERISTICS OF NO.1 BASIC ULTRABASIC INTRUSIVE BODY AND ITS ORE POTENTIALITY,POBEI,XINJIANG

The No. 1 intrusive body in Pobei is a multiple intrusion that was formed from mantle-derived mafic magma by means of deep-seated differentiation and crystal separation. This intrusive body is the type of olivine gabbro-olivine pyroxenolite-clinopyroxene peridotite,and well splitting. The mineralization of Cu,Ni sulfides is discovered on its outcrop. Comparing with the known mineralization intrusions in China,the type,petrochemical characters of the intrusion,contents of useful elements and mineralization range in Cu, Ni sulf ide mineralization intrusions. The geophysical survey data show that there are geological bodies with lower resistivity and higher polarizability in the deep. The No. 1 intrusive body is prospective to find Cu,Ni sulfides in Pobei area.