大兴安岭北部比利亚谷铅锌矿黄铁矿Re- Os同位素年龄及He- Ar同位素地球化学特征
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

本文为国家重点研发计划项目(编号2017YFC0601303)、国家自然科学基金项目(编号41202042)和中央级公益性科研院所基本科研业务费专项资金资助项目(编号KK2124、K1211)联合资助的成果。


Re- Os isotope age of pyrite and He- Ar isotope of sulfides from the Biliyagu Pb- Zn deposit in the northern Great Xing’an Range
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    比利亚谷铅锌矿位于海拉尔- 根河中生代火山盆地北西缘的得尔布干成矿带。该矿床赋存于上侏罗统满克头鄂博组酸性火山岩中,受NW向断裂构造控制,主矿体呈脉状产出。由于缺少适合传统放射性同位素定年的矿物,其成矿时代未得到很好的限定,制约了对矿床成因的认识。本文采用矿床中与矿石矿物密切共生的黄铁矿Re- Os同位素定年技术对比利亚谷铅锌矿的成矿时代进行研究。定年结果显示,热液成因黄铁矿Re- Os等时线年龄为133. 4±4. 4 Ma,与成矿带内其他铅锌矿成矿时间相似,说明得尔布干成矿带内中生代铅锌银矿床基本〖JP2〗形成于同一时代。比利亚谷矿床硫化物包裹体He- Ar同位素分析显示,3 He/4 He比值为0. 02~2. 37 Ra,40 Ar/36 Ar〖JP〗比值为293. 5~306,表明主成矿期多金属成矿流体主要为地壳流体和饱和大气水的混合,但有少量幔源成分参与。比利亚谷矿床形成于蒙古- 鄂霍茨克洋闭合后的碰撞后伸展环境,得尔布干成矿带属于蒙古- 鄂霍茨克成矿省的一部分。

    Abstract:

    The Biliyagu Pb- Zn deposit of the Derbugan metallogenic belt is located in the northwest of the Hailar- Genhe Mesozoic volcanic basin. This deposit is hosted in the felsic volcanic rocks of the Upper Jurassic Manketouebo Formation, with mainly veined type ore bodies controlled by the NW- trending faults. Due to lack of suitable minerals for traditional isotopic dating, the ore- forming age remains unknown, which has limited the understanding of the Pb- Zn mineralization. In this study, Re- Os isotopic dating of pyrite associated with galena and sphalerite has been performed to constrain the ore- forming age of the Biliyagu Pb- Zn deposit. Re- Os isotopic dating of hydrothermal pyrite yields an age of 133.4±4.4 Ma, consistent with Pb- Zn mineralization age of the belt, suggesting that the Mesozoic Pb- Zn mineralization in the Derbugan metallogenic belt were generally simultaneous. He- Ar isotopic analyses of fluid inclusions in the sulfides show that the 3 He/4 He and 40 Ar/36 Ar rations are in the range of 0.02~2.37 Ra and 293.5~306, respectively, indicating that the ore- forming fluid in the main metallogenic stage represents a mixture of crustal- derived fluid and saturated atmospheric water, as well as a small amount of mantle- derived components. The Biliyagu deposit was formed in a post- collisional extensional environment after the closure of the Mongolia- Okhotsk ocean indicating that the Derbugan metallogenic belt is a part of the Mongolia- Okhotsk metallogenic province.

    参考文献
    相似文献
    引证文献
引用本文

马玉波,张勇,李立兴,邢树文,张增杰,张彤,肖克炎,王海坡,范建福.2022.大兴安岭北部比利亚谷铅锌矿黄铁矿Re- Os同位素年龄及He- Ar同位素地球化学特征[J].地质学报,96(4):1265-1278.
Ma Yubo, Zhang Yong, Li Lixing, Xing Shuwen, Zhang Zengjie, Zhang Tong, Xiao Keyan, Wang Haipo, Fan Jianfu.2022. Re- Os isotope age of pyrite and He- Ar isotope of sulfides from the Biliyagu Pb- Zn deposit in the northern Great Xing’an Range[J]. Acta Geologica Sinica,96(4):1265-1278.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-01-23
  • 最后修改日期:2021-06-24
  • 录用日期:
  • 在线发布日期: 2021-10-29
  • 出版日期: