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磷灰石低温热年代学在地学中的应用
引用本文:肖萍,王伟,钟宁,邵延秀,唐茂云,韩非.磷灰石低温热年代学在地学中的应用[J].地质科学,2015,0(3):834-849.
作者姓名:肖萍  王伟  钟宁  邵延秀  唐茂云  韩非
作者单位:1. 中国地震局地质研究所 北京 100029; 2. 中国地震局兰州地震研究所 兰州 730000
摘    要:磷灰石裂变径迹(AFT)和(U-Th)/He(AHe)是目前研究地壳表层(<5 km)中构造演化与气候驱动相互作用且记录超过1 Ma热历史最有效的手段之一。AFT和AHe这两种方法对低温(40 ℃~120 ℃)敏感, 能够较精确地获得地下1~4 km处的构造-热演化信息, 可用于解决地质体定年、盆地热历史、造山带演化、热液矿床及含油气盆地中生排烃与运移时限等诸多地质问题。本文系统归纳了这两种方法的原理、定年影响因素、年龄-高程法及应用中容易混淆的概念等内容, 并以北美西部大盆地卡林型金矿床、美国阿第伦达克山脉东部马西山、塔里木盆地早古生代的热历史演化为例, 详细阐述了它们的应用过程。为有效、合理地将磷灰石低温年代学应用于地学, 在具体的应用过程须注意以下问题: 充分把握研究区的构造背景, 根据研究目的合理设计采用剖面, 综合使用多种测年方法, 以及采用合理的数据处理、分析方法解释磷灰石低温年代学年龄数据。

关 键 词:磷灰石  裂变径迹  (U-Th)/He  低温热年代学  地学应用
收稿时间:2014-11-04
修稿时间:2014-11-04;

A review and application of apatite thermochronology
Xiao Ping,Wang Wei,Zhong Ning,Shao Yanxiu,Tang Maoyun,Han Fei.A review and application of apatite thermochronology[J].Chinese Journal of Geology,2015,0(3):834-849.
Authors:Xiao Ping  Wang Wei  Zhong Ning  Shao Yanxiu  Tang Maoyun  Han Fei
Institution:1. Institute of Geology, China Earthquake Administration, Beijing 100029; 2. Lanzhou Base of Institute of Earthquake Science, China Earthquake Administration, Lanzhou 730000
Abstract:Sensitive to the temperature range of 40 ℃~120 ℃ and recording thermal histories more than million-year scale, fission-track and(U-Th)/He low-temperature thermochronology of apatite are the most effective radiometric dating methods on interpreting time-temperature constraints and cooling processes within the uppermost crust. In this paper, we summarize the basic principle, factors affecting measuring, and misconception on age and elevation relationship plot and its application of the two dating methods. Moreover, taking three specific examples for the combination application into different geological settings: The timing of mineralization and hydrothermal events for Carlin-type gold deposits of Great Basin in western United States, thermal history and landscape development of the eastern Adirondack Mountains and Early Paleozoic thermal history of Tarim Basin. In order to get full use of the apatite thermochronology, we suggest that suitable transect, multiple thermochronology, and accurate interpretation and modeling for the data for different study purpose.
Keywords:Apatite  Fission track  (U-Th)/He  Low-temperature thermochronology  Geological application
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