南祁连化隆微地块铜镍成矿地质条件及找矿方向  

Metallogenic Geological Conditions of Hualong Dome-Like Massif,South Qilian Mountain and Prospecting Direction

作　　者：张照伟[1] 李文渊[1] 高永宝[1] 郭周平[1] 谭文娟[1] 姜寒冰[1] 

机构地区：[1]中国地质调查局西安地质调查中心,西安710054

出　　处：《地质学报》2009年第10期1483-1489,共7页Acta Geologica Sinica

基　　金：国家科技支撑重点项目(编号2006BAB01A01和2006BAB01B08);国家自然科学基金项目(编号40772062);中国地质大调查项目(编号1212010918024)资助成果

摘　　要：利用综合对比研究与实际野外工作,获得的秦祁昆造山带重要成矿事件与构造响应的研究及地质找矿信息。通过金川矿床所在的龙首山群与南祁连化隆微地块中的化隆群结晶基底的地质对比,结合地球物理及其相关其他地质信息,发现化隆群具有与金川矿床所在的龙首山隆起相似的成矿地质条件。由此,提出南祁连化隆微地块具有较好的铜镍成矿条件及找矿潜力,所发育的铜镍矿点与金川矿床可能为同一大规模岩浆构造作用的产物。现有的野外工作及找矿实践亦表明了在巨厚红层覆盖下发育基性超基性岩体,并表现出铜镍矿化显示,同时提示在化隆微地块还有发现新的同类型岩体和铜镍矿床的潜在条件。Metallgenoic events and their responses to structures in the Qinling, Qilian and Kunlun mountains are understood using comprehensive contrastive study along with field investigation. The geological comparison of crystalline basement between Longshoushan Group hosting the Jinchuan deposit and Hualong Group in the centre of the Hualong dome-like massif, in combination with geophysical and other geological data, suggests that the Hualong Group has the similar preferential geological conditions as the Longshoushan dome at which the Jinchang deposit is located. Therefore, it is suggested that Hualong has good Ni-Cu metallogenic conditions and prospecting potentialities and Cu-Ni deposits developed in this massif is likely the product of the same large tectonic magmatism. The existing field work and exploration experience also show that basic-ultramafic intrusive rocks are developed below the thick red cover and characterized by Ni and Cu mineralization. Meanwhile, it is very likely to discover rock masses of the same type and potential geological conditions for Ni-Cu mineralization.

关 键 词：南祁连 化隆 铜镍矿 地质条件 找矿方向 

分 类 号：P618.41[天文地球—矿床学]