东昆仑哈日扎多金属矿区Ⅳ矿带成矿时代的锆石裂变径迹定年分析

田承盛; 袁万明; 曾小平; 张爱奎; 朱传宝; 孙非非; 马忠元; 张丽婷; 郝娜娜

doi:10.11889/j.0253-3219.2015.hjs.38.010502

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东昆仑哈日扎多金属矿区Ⅳ矿带成矿时代的锆石裂变径迹定年分析

核物理、交叉学科研究 | 更新时间：2021-03-03

- 东昆仑哈日扎多金属矿区Ⅳ矿带成矿时代的锆石裂变径迹定年分析
- Zircon fission track dating for mineralizing ages in IV ore-belt of Hariza polymetallic mining district, Eastern Kunlun Mountains, Qinghai-Tibet Plateau
- 核技术 2015年38卷第1期文章编号：010502
- 作者机构：
  
  1. 青海省地质调查局,西宁,810012
  2. 中国地质大学,北京,100083
  3. 青海省第三地质矿产勘查院,西宁,810029
- 作者简介：
  
  [ "作者简介:田承盛，男，1965年出生，高级工程师，长期从事矿床学和地质矿产综合研究" ]
  [ "通讯作者: 袁万明 E-mail:yuanwm@cugb.edu.cn" ]
- 基金信息：
  
  中国地质调查局地质调查工作项目(基2011-03-04-06)、青海省地质调查局项目(青地调勘2013-103)和国家自然科学基金项目(No.41172088、No.40872141)资助()
- DOI：10.11889/j.0253-3219.2015.hjs.38.010502
  中图分类号：
- 纸质出版日期：2015-01-07
- 稿件说明：
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田承盛, 袁万明, 曾小平, 等. 东昆仑哈日扎多金属矿区Ⅳ矿带成矿时代的锆石裂变径迹定年分析[J]. 核技术, 2015,38(1):010502

TIAN Chengsheng, YUAN Wanming, ZENG Xiaoping, et al. Zircon fission track dating for mineralizing ages in IV ore-belt of Hariza polymetallic mining district, Eastern Kunlun Mountains, Qinghai-Tibet Plateau[J]. Nuclear techniques, 2015, 38(1): 010502
田承盛, 袁万明, 曾小平, 等. 东昆仑哈日扎多金属矿区Ⅳ矿带成矿时代的锆石裂变径迹定年分析[J]. 核技术, 2015,38(1):010502 DOI： 10.11889/j.0253-3219.2015.hjs.38.010502.

TIAN Chengsheng, YUAN Wanming, ZENG Xiaoping, et al. Zircon fission track dating for mineralizing ages in IV ore-belt of Hariza polymetallic mining district, Eastern Kunlun Mountains, Qinghai-Tibet Plateau[J]. Nuclear techniques, 2015, 38(1): 010502 DOI： 10.11889/j.0253-3219.2015.hjs.38.010502.

摘要

裂变径迹核分析技术是成矿作用研究的新手段。哈日扎多金属矿区位于青海省东昆仑东段，属于东昆中多旋回岩浆弧带。矿区已识别出较大规模成矿带7条，成矿类型主要是构造蚀变岩型，成矿作用与岩浆活动关系密切。本文重点探讨其中Ⅳ矿带的成矿年龄。第Ⅳ成矿带由走向NW东支矿带和走向NE西支矿带构成。所获得的6个锆石裂变径迹年龄值变化于120?204 Ma，并具有204 Ma、153?168 Ma和120 Ma 年龄组，这是本区新获得的年龄结果。结合矿区地质与区域热事件特征，认为这3组年龄是区内3期成矿作用的体现，其中东支矿带早期成矿时间比西支矿带早。同时，3期成矿事件也较好地反映了区内的构造活动。

Abstract

Background: Hariza polymetallic ore district is located in eastern section of East Kunlun Mountains

Qinghai Province and belongs to multicycle magmatic arc belt in Middle of East Kunlun. A total of seven large scale mineralizing zones have been discriminated and mainly fall into tectonic alterated rock type. The IV metallogenic zone is composed of two branches

NE- and NW-trending

of zones. The mineralization was close related to magmatic activities and was controlled by both NE- and NW- trending fault zones. Purpose: This paper applies the zircon fission track nuclear technique to probe the mineralizing ages and epochs for IV metallogenic zone in Hariza polymetallic ore district. Methods: The conservation temperature of zircon fission track is about 250 oC that coincides with the metallogenic temperature in this district and so the zircon fission track dating technique could reveal the mineralization age and epoch. Results: The six zircon fission track results are achieved

ranging from 120 Ma to 204Ma

which could be divided into three groups of 204 Ma

153?168 Ma and 120 Ma. Conclusion: The three groups of ages reveal three periods of mineralization that correspond with three tectonic activities. The mineralizing time in the SE-trending branch belt was earlier than that in the SW-trending branch. Abstract

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