吉尔吉斯斯坦布丘克造山型金矿床:来自流体包裹体、H- O- S同位素证据
作者:
基金项目:

本文为中国黄金集团有限公司“一带一路”地质科研项目(编号 WKY201906)资助的成果。


The Buchuk orogenic gold deposit in Kyrgyzstan: Evidences from fluid inclusions and H- O- S isotopes
Author:
  • 摘要
  • | |
  • 访问统计
  • | |
  • 相似文献 [20]
  • | | |
  • 文章评论
    摘要:

    吉尔吉斯斯坦北天山构造带的矿床学数据缺乏,制约了天山造山带境内外成矿对比。布丘克金矿床位于吉尔吉斯斯坦北天山构造带中部。金矿体为石英复脉,呈带状发育于NWW向韧性剪切带中。矿体倾向SSW,倾角60°~70°,赋矿围岩主要为侵入于早古生代变质碎屑杂岩中的正长斑岩。布丘克金矿床成矿期石英流体包裹体观察、石英H- O同位素、硫化物S同位素测试结果显示,布丘克金矿床石英脉中包裹体大小集中在2~10 μm之间,类型以H2O- CO2型、富CO2型、水溶液型包裹体为主,成分以富CO2、含CH4为特征。成矿流体具有中温(200~320℃)、低盐度(3%~7%NaCleqv)特征;石英δDV- SMOW值介于108.1‰~90.2‰之间,δ18O流体值介于4.86‰~9.26‰之间; 黄铁矿δ34S分布在0‰左右(0.9‰~1.6‰)。综合本文数据、矿床地质特征、区域地质资料,本文认为布丘克金矿床为发育于吉尔吉斯斯坦北天山构造带内的造山型金矿床,韧性剪切带控制了成矿作用过程; 成矿热液来自含碳地层的变质脱水作用,成矿物质来自深部岩浆岩。

    Abstract:

    The lack of data on mineral deposits in the North Tianshan tectonic belt of Kyrgyzstan restricts the comparison of mineralization in China and abroad in the Tianshan orogenic belt. The Buchuk gold deposit is located in the middle of the Kyrgyz North Tianshan tectonic belt. The gold ore bodies are developed in the NWW- trending ductile shear zone in the form of quartz complex veins. The ore body is inclined to SSW, with a dip angle of 60°~70°. The ore- hosting wall rock is mainly syenite porphyry intruded into the Early Paleozoic metamorphic clastic complex. The observation of quartz fluid inclusions, quartz H- O isotope, and sulfide S isotope test results show that the size of the inclusions in the quartz veins of the Buchuk gold deposit is concentrated between 2~10 μm, and the types of inclusions are mainly H2O- CO2 type, CO2- rich type, and aqueous solution type. The components of fluid inclusions are characterized by being rich in CO2 and containing CH4. The ore- forming fluid has the characteristics of mesothermal (200~320℃) and low salinity (3%~7% NaCleqv). The quartz δDV- SMOW values range from 108.1‰ to 90.2‰, and δ18Ofluid fluid values range from 4.86‰ to 9.26‰; the pyrites δ34S are distributed around 0‰ (0.9‰ to 1.6‰). Based on the data in this paper, the geological characteristics of the deposit, and the regional geological data, this paper proposes that the Buchuk gold deposit is an orogenic gold deposit developed in the North Tianshan tectonic belt in Kyrgyzstan, and ductile shear zone controls the mineralization process. The ore- forming hydrothermal fluids come from the metamorphic dehydration of carbon- bearing strata, and the ore- forming materials come from deep magmatic rocks.

    参考文献
    引证文献
    网友评论
    网友评论
    分享到微博
    发 布
引用本文

史鹏亮,屈海浪,鄂建新,刘春发,缪广,马麒镒,戴毅.2023.吉尔吉斯斯坦布丘克造山型金矿床:来自流体包裹体、H- O- S同位素证据[J].地质学报,97(3):738-752.
Shi Pengliang, Qu Hailang, E Jianxin, Liu Chunfa, Miao Guang, Ma Qiyi, Dai Yi.2023. The Buchuk orogenic gold deposit in Kyrgyzstan: Evidences from fluid inclusions and H- O- S isotopes[J]. Acta Geologica Sinica,97(3):738-752.

复制
分享
文章指标
  • 点击次数:444
  • 下载次数: 846
  • HTML阅读次数: 230
  • 引用次数: 0
历史
  • 收稿日期:2022-08-17
  • 最后修改日期:2022-09-24
  • 录用日期:2022-10-08
  • 在线发布日期: 2023-03-31