青海都兰县哈日扎多金属矿区构造活动的磷灰石裂变径迹分析

孙非非; 朱传宝; 袁万明; 张爱奎; 马忠元; 郝娜娜; 冯云磊

doi:10.11889/j.0253-3219.2016.hjs.39.120501

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青海都兰县哈日扎多金属矿区构造活动的磷灰石裂变径迹分析

核物理、交叉学科研究 | 更新时间：2021-05-24

- 青海都兰县哈日扎多金属矿区构造活动的磷灰石裂变径迹分析
- Apatite fission track analysis of tectonic activity in Harizha polymetallic ore district, Dulan county, Qinghai province
- 核技术 2016年39卷第12期文章编号：120501
- 作者机构：
  
  1.青海省第三地质矿产勘查院西宁 810029
  2.中国地质大学北京 100083
- 作者简介：
  
  [ "孙非非, 女, 1986年出生, 2009年毕业于泰山学院, 现硕士研究生, 主要从事地质与矿产勘查工作", "SUN Feifei, female, born in 1986, graduated from Taishan University in 2009, master student, mainly engaged in geological and mineral prospecting work" ]
- 基金信息：
  
  中国地质调查局地质调查工作项目(No.2011-03-04-06);国家自然科学基金(No.41172088);国家自然科学基金(No.40872141);青海省地质调查局项目(青地调勘2013-103)
- DOI：10.11889/j.0253-3219.2016.hjs.39.120501
  中图分类号： TL99
- 收稿日期：2016-05-04，
  
  修回日期：2016-08-27，
  
  纸质出版日期：2016-12
- 稿件说明：
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孙非非, 朱传宝, 袁万明, 等. 青海都兰县哈日扎多金属矿区构造活动的磷灰石裂变径迹分析[J]. 核技术, 2016,39(12):120501

Feifei SUN, Chuanbao ZHU, Wanming YUAN, et al. Apatite fission track analysis of tectonic activity in Harizha polymetallic ore district, Dulan county, Qinghai province[J]. Nuclear techniques, 2016, 39(12): 120501
孙非非, 朱传宝, 袁万明, 等. 青海都兰县哈日扎多金属矿区构造活动的磷灰石裂变径迹分析[J]. 核技术, 2016,39(12):120501 DOI： 10.11889/j.0253-3219.2016.hjs.39.120501.

Feifei SUN, Chuanbao ZHU, Wanming YUAN, et al. Apatite fission track analysis of tectonic activity in Harizha polymetallic ore district, Dulan county, Qinghai province[J]. Nuclear techniques, 2016, 39(12): 120501 DOI： 10.11889/j.0253-3219.2016.hjs.39.120501.

摘要

通过采集哈日扎多金属矿区不同矿带不同岩性的样品，进行磷灰石裂变径迹年代学分析，探讨矿区的构造演化特征。磷灰石裂变径迹年龄于120-60.2Ma变化，具体可分为120-93Ma、78Ma和66-60Ma三个年龄组，较好地体现了该地区经历不同构造隆升剥蚀作用，120-93Ma和66-60Ma分别代表冈底斯地体、喜马拉雅地体先后于早白垩世、晚白垩世时期向北俯冲并与北侧地块碰撞-汇聚的体现，78Ma是区域上低级变质作用的反映。磷灰石裂变径迹模拟结果显示，不同样品地质热历史相似，分为三个阶段：160-90Ma、90-20Ma、20Ma至今，三个阶段分别隆升0.28km、1.40km、1.00km，总的隆升量为2.68km，第三阶段代表青藏高原及周缘新生代重大隆升期，是印度板块与欧亚板块碰撞后持续挤压和后期拉张环境下的整体强烈隆升。

Abstract

Background:

Harizha 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 four large scale mineralizing zones have been discriminated in north area and mainly fall into tectonic alterated rock type.

Purpose:

The tectonic evolution characteristics of Harizha polymetallic ore district is discussed by analyzing the samples with different lithologies collected from different ore belts.

Methods:

The fission track age of apatite was used to calculate the absolute uplift rate of the plateau.

Results:

The apatite fission track ages range from 120 Ma to 60 Ma and could be divided into three units:120-93 Ma

78 Ma and 66-60 Ma

which reflected the various tectonic uplift denudation in this region. Units of 120-93 Ma and 66-60 Ma respectively represent the stages when Gangdise terrain and Himalayan terrain subducted to the north

collided and converged with the northern block in early cretaceous and late cretaceous successively. Age of 78 Ma shows the regional low-grade metamorphism.

Conclusion:

The simulation results of apatite fission track reveal that different samples have the similar geological thermal history

which is divided into three stages:160-90 Ma

90-20 Ma and 20-0 Ma. The amounts of uplift of these three stages are approximately 0.28 km

1.40 km and 1.00 km

with 2.68 km as the total amount of uplifting. The stage of 20-0Ma represents a major cenozoic uplifting in Tibetan plateau and its periphery

which is the result of continuous pressing after the collision between Indian plate and Eurasian plate and the strong uplift under the extension environment afterwards.

关键词

Keywords

references

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