【摘要】：石屋Cu-Au礦位于新疆西準(zhǔn)噶爾巴爾魯克山東北部,是近年發(fā)現(xiàn)的斑巖型礦點。研究區(qū)發(fā)育閃長巖、石英閃長巖、石英閃長玢巖和英云閃長斑巖,成礦與晚石炭世石英閃長玢巖有關(guān),礦化以細(xì)脈狀和浸染狀為主。熱液蝕變包括鉀化、硅化、電氣石化、綠泥石化、綠簾石化等。礦石礦物以黃銅礦和黃鐵礦為主。含礦石英脈中的流體包裹體可分為富液相(Ⅰ型)、富氣相(Ⅱ型)和含子礦物相(Ⅲ型)3類。成礦過程分為3個階段:早階段主要發(fā)育石英、鉀長石,均一溫度集中在300~360℃,鹽度分為中低鹽度和高鹽度2類;主階段主要發(fā)育石英、黃銅礦和黃鐵礦,均一溫度為220~260℃,w(NaCl_(eq))為0.5%~6.9%,為中溫低鹽度流體,屬于H_2O-NaCl-CO_2-C_2H_6-CH_4體系;晚階段發(fā)育石英和方解石,均一溫度集中在132~179℃,w(NaCl_(eq))為0.2%~6.2%,為低溫低鹽度流體,屬于H_2O-NaCl-CO_2-CH_4-C_2H_6體系。早階段和主階段硫化物的δ~(34)S值為-0.2‰~+2.7‰,表明成礦物質(zhì)源自巖漿。成礦流體溫度、壓力的下降和p H值的變化是導(dǎo)致礦質(zhì)沉淀的主要原因。與區(qū)域上大型-超大型斑巖銅礦對比研究,發(fā)現(xiàn)石屋銅金礦點在成礦時代、構(gòu)造背景和成礦巖體氧逸度方面與其相似,因此具有很大的成礦潛力。
[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，

本文編號：2156664