新疆准噶尔地区富硫型与贫硫型浅成低温热液金矿床成矿流体与碳、硫、铅同位素  

Wang L J,Wang JB,Wang YW,Zhu HP and Qu LL.2005.The study of ore-fluid and C-S-Pb isopope of rich in S and poor in S types in epithermal gold deposits,Junggar area,Xinjiang.

作　　者：王莉娟[1] 王京彬[1] 王玉往[1] 朱和平[1] 曲丽丽[2] 

机构地区：[1]中国科学院矿产资源研究重点实验室,100029 [2]北京矿产地质研究院,100012

出　　处：《岩石学报》2005年第5期1382-1388,共7页Acta Petrologica Sinica

基　　金：国家重点基础研究发展规划(2001cb409806);国家自然科学基金(批准号:40273021);中国科学院矿产资源研究重点实验室资助

摘　　要：对新疆准噶尔地区浅成低温热液型金矿床中富硫型的阔尔真阔腊金矿、贫硫型的石英滩金矿进行了流依包裹体的均一温度、爆裂温度、包裹体气液相成分、H、O 同位素、矿体围岩及脉石英包裹体 C 同位素、矿体中黄铁矿等 S、Ph 同位素等系统地进行了研究,综合研究表明,本区该类型金矿成矿流体一般温度低、盐度低,来源主要为循环的大气水、矿石中黄铁矿的 S、Pb 同位素均为深源,暗示金的深部来源:矿体石英包裹体中 CO_2的δ^(13)C 为低于-10‰的有机碳,反映了本区年轻的富含有机质的沉积地层参与了金的成矿。此外,本文首次提出了富硫型阔尔真阔腊金矿床成矿流体中有侵入岩浆热液参与,深部有多金属成矿远景;贫硫型石英滩金矿没有侵入岩浆热液的参与,成矿仅与火山古热液活动有关,其成矿较单一。此外,阔尔真阔腊金矿中低温流体活动较强,金矿化也较强:石英滩金矿低温流体活动相对较弱,金矿化也较弱,也体现了该类型金矿床低温流体活动的越强烈,金矿化越强的规律。Homogeneous temperatures, decrepitation temperatures, gas and liquid components of inclusions, hydrogen and oxygen isotopes, carbon isotope of inclusions of wall-rock and quartz, Sulfur isotope and Lead isotope of pyrite in ore body have been studied on the two typical shallow hydrothermal gold ore deposits in Junggar area of Xinjiang Province, sulfur-rich style of Kuoerzhenkuona gold deposit and poor-sulfur style of shiyingtan dold deposit. It shows that ore-forming fluid is characterized in low temperature and low salinites and originates from recurrent meteoric precipitation. Sulfur isotope and Lead isotope of pyrite are all rooted in deep source that indicate plutouic gold source. And that δ^13C of CO2 fluid inclusions hosted in quartz is lower than -10‰ of organic carbon display that the sedimentary strata have involved into the gold-forming procedure. Another, this paper proves that the gold-forming fluids in the sulfur-rich Kuoerzhenkuona Gold Deposit has been mixed by intrusion magmatic hydrothermal fluid, possesses multi-metal ore-forming perspective in its deep part, low-temperature fluid has superposed frequently and gold mineralization is very strong, which shows that it is medium-scale gold deposit. However, that the ore-forming manner of sulfur-poor Shiyingtan Gold Deposit, without magmatic hydrotherm mixture, is simple, its low-temperature fluid function and gold mineralization is weak, proves that it is small-scale gold ore deposit. In general, it seems to possesse this rule that the stronger the low-temperature fulid activity, the more serious the gold mineralization is.

关 键 词：新疆 准噶尔地区 低温热液金矿床 成矿流体 同位素 碳 硫 铅 

分 类 号：P618.51[天文地球—矿床学]