磷灰石 4He/3He热年代学——一种低温热年代学研究的新技术

doi:10.3969/j.issn.0253-4967.2014.04.006

地震地质 ›› 2014, Vol. 36 ›› Issue (4): 1009-1019.DOI: 10.3969/j.issn.0253-4967.2014.04.006

磷灰石 ⁴He/³He热年代学——一种低温热年代学研究的新技术

杨静^1,2, 郑德文¹, 陈文², 张竹琪¹

1. 中国地震局地质研究所, 地震动力学国家重点实验室, 北京 100029;
2. 中国地质科学院地质研究所, 同位素热年代学实验室, 大陆构造与动力学国家重点实验室, 北京 100037

收稿日期:2014-05-31 出版日期:2014-12-30 发布日期:2015-01-07
作者简介:杨静,女,1984年生,现为中国地质科学院地质研究所博士后,主要从事⁴⁰Ar/³⁹Ar年代学和(U-Th)/He年代学研究,电话:010-68999819,E-mail:yangjing822822@gmail.com.
基金资助:
国家自然科学基金(41272215)和地震动力学国家重点实验室自主研究课题(2009LED2009A05)共同资助

APATITE ⁴He/³He THERMOCHRONOMETRY —A NEW METHOD OF LOW TEMPERATURE THERMOCHRONOMETRY

YANG Jing^1,2, ZHENG De-wen¹, CHEN Wen², ZHANG Zhu-qi¹

1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. Institute of Geology, Chinese Academy of Geological Sciences, Laboratory of Isotope Thermochronology, National Key Laboratory of Continental Structure and Dynamic, Beijing 100037, China

Received:2014-05-31 Online:2014-12-30 Published:2015-01-07

摘要/Abstract

摘要：

磷灰石He的封闭温度(约70℃)是目前已知体系中最低的, ⁴He在磷灰石中空间分布包含了样品经历的低温阶段(30～90℃)的热历史信息.磷灰石 ⁴He/³He热年代学是根据经典的扩散理论, 并用质子照射磷灰石使其内部生成均匀分布的 ³He, 然后应用一种数学方法来确定磷灰石中 ⁴He的空间分布, 由此可以限制样品所经历的热历史.文中简单介绍了该方法的数学原理、模拟方法、应用以及现存的主要问题等, 虽然这一方法还处于不断探索中, 但是其对低温热历史的灵敏性使得这种方法有广阔的前景.

关键词: ⁴He/³He热年代学, 磷灰石, 热历史, ⁴He空间分布

Abstract:

The apatite has the lowest available He closure temperature (about 70℃); the ⁴He concentration profile is a very rich source of information on an apatite's low temperature (30～90℃) cooling history. According to classical diffusion theory, the ⁴He/³He thermochronometry technique in which the natural spatial distribution of ⁴He is constrained using a mathematical technique in a sample containing synthetic, proton-induced ³He. The approach is useful for constraining the low temperature cooling histories of individual samples. The review gives the fundamental theory, simulation method, the example application of this thermochronometry technique and the potential applications. Although this technique is in the exploration, but the sensitivity of the low-temperature cooling history makes this method have broad prospects.

Key words: ⁴He/³He thermochronometry, apatite, cooling history, ⁴He concentration profile

中图分类号:

P597⁺.3

杨静, 郑德文, 陈文, 张竹琪. 磷灰石 ⁴He/³He热年代学——一种低温热年代学研究的新技术[J]. 地震地质, 2014, 36(4): 1009-1019.

YANG Jing, ZHENG De-wen, CHEN Wen, ZHANG Zhu-qi. APATITE ⁴He/³He THERMOCHRONOMETRY —A NEW METHOD OF LOW TEMPERATURE THERMOCHRONOMETRY[J]. SEISMOLOGY AND GEOLOGY, 2014, 36(4): 1009-1019.

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磷灰石 ⁴He/³He热年代学——一种低温热年代学研究的新技术

APATITE ⁴He/³He THERMOCHRONOMETRY —A NEW METHOD OF LOW TEMPERATURE THERMOCHRONOMETRY

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