新疆西准噶尔石屋斑岩型Cu-Au矿点地质特征、成矿流体及成矿潜力
发布时间：2018-07-31 19:53
【摘要】：石屋Cu-Au矿位于新疆西准噶尔巴尔鲁克山东北部,是近年发现的斑岩型矿点。研究区发育闪长岩、石英闪长岩、石英闪长玢岩和英云闪长斑岩,成矿与晚石炭世石英闪长玢岩有关,矿化以细脉状和浸染状为主。热液蚀变包括钾化、硅化、电气石化、绿泥石化、绿帘石化等。矿石矿物以黄铜矿和黄铁矿为主。含矿石英脉中的流体包裹体可分为富液相(Ⅰ型)、富气相(Ⅱ型)和含子矿物相(Ⅲ型)3类。成矿过程分为3个阶段:早阶段主要发育石英、钾长石,均一温度集中在300~360℃,盐度分为中低盐度和高盐度2类;主阶段主要发育石英、黄铜矿和黄铁矿,均一温度为220~260℃,w(NaCl_(eq))为0.5%~6.9%,为中温低盐度流体,属于H_2O-NaCl-CO_2-C_2H_6-CH_4体系;晚阶段发育石英和方解石,均一温度集中在132~179℃,w(NaCl_(eq))为0.2%~6.2%,为低温低盐度流体,属于H_2O-NaCl-CO_2-CH_4-C_2H_6体系。早阶段和主阶段硫化物的δ~(34)S值为-0.2‰~+2.7‰,表明成矿物质源自岩浆。成矿流体温度、压力的下降和p H值的变化是导致矿质沉淀的主要原因。与区域上大型-超大型斑岩铜矿对比研究,发现石屋铜金矿点在成矿时代、构造背景和成矿岩体氧逸度方面与其相似,因此具有很大的成矿潜力。
[Abstract]:Shiwu Cu-Au deposit, located in the northern part of Balluk Shandong, West Junggar, Xinjiang, is a porphyry deposit discovered in recent years. Diorite quartz diorite porphyry and quartz diorite porphyry are developed in the study area. The mineralization is related to the late Carboniferous quartz diorite porphyrite. Hydrothermal alteration includes potassium, silicification, electrical petrochemical, green mud petrifaction, green curtain petrifaction and so on. The ore minerals are chalcopyrite and pyrite. The fluid inclusions in the ore-bearing veins can be classified into three types: rich liquid phase (type 鈪，
本文编号：2156664
[Abstract]:Shiwu Cu-Au deposit, located in the northern part of Balluk Shandong, West Junggar, Xinjiang, is a porphyry deposit discovered in recent years. Diorite quartz diorite porphyry and quartz diorite porphyry are developed in the study area. The mineralization is related to the late Carboniferous quartz diorite porphyrite. Hydrothermal alteration includes potassium, silicification, electrical petrochemical, green mud petrifaction, green curtain petrifaction and so on. The ore minerals are chalcopyrite and pyrite. The fluid inclusions in the ore-bearing veins can be classified into three types: rich liquid phase (type 鈪，
本文编号：2156664
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2156664.html
