[1]李英奎,Jon Harbor,刘耕年,等.宇宙核素地学研究的理论基础与应用模型[J].水土保持研究,2005,12(04):139-145.
　LI Ying-kui,Jon Harbor,LIU Geng-nian,et al.Theoretical Background and Interpretation Models of In-situ Cosmogenic Nuclides in Earth Sciences[J].Research of Soil and Water Conservation,2005,12(04):139-145.
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宇宙核素地学研究的理论基础与应用模型

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 12 期数: 2005年04期 页码: 139-145 栏目: 出版日期: 1900-01-01
Title:
Theoretical Background and Interpretation Models of In-situ Cosmogenic Nuclides in Earth Sciences
作者:
李英奎1, Jon Harbor1, 刘耕年2, 周力平2, 崔之久2
1. 普渡大学地球与大气科学系, 美国印第安那州, 47906;
2. 北京大学环境学院, 北京, 100871
Author(s):
LI Ying-kui1, Jon Harbor1, LIU Geng-nian2, ZHOU Li-ping2, CUI Zhi-jiu2
1. Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907-1397, USA;
2. College of Environmental Sciences, Peking University, Beijing 100871, China
关键词:
宇宙核素; 地貌演化; 暴露年龄; 埋藏时代
Keywords:
Cosmogenic nuclide; Landscape evolution; Surface exposure age; Burial dating
分类号:
P931;P597
摘要:
宇宙核素是宇宙射线与地表物质相互作用的产物，具有蜕变、中子捕获和介子反应三种形成机制。宇宙核素产生率随深度的变化而变化，同时还受纬度、高度和时间等因素的影响，其浓度变化与表面的暴露时间和侵蚀速率密切有关。宇宙核素的应用模型主要基于单一核素和核素对，单一核素方法只能解决一个未知因素，但核素浓度-深度分布曲线可用于复杂问题的解决。核素对方法可以解决具有多种未知因素的复杂状况，实际应用中主要基于核素比值变化曲线的分析。另外，基于核素对还可以解决埋藏年龄等问题。
Abstract:
Cosmogenic nuclides found in rocks and sediments at the Earth’s surface are produced primarily by three forms of interaction between cosmic rays and minerals; spallation, neutron-capture reactions and muon-induced reactions.The production rate of these nuclides varies with depth, latitude, altitude, and time.The concentration of nuclides in surface rocks and sediments is a function of exposure time and erosion rate, and thus has great potential for use in landscape evolution studies.In the Earth sciences, single nuclides are typically used to resolve one unknown, normally time of exposure or erosion rate.Ratios of the concentrations of multiple nuclides can be used to resolve exposure age and erosion rate, as well as more complex issues such as the duration of burial events.

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备注/Memo

收稿日期:2005-4-26
基金项目:国家自然科学基金资助（项目号：90102016；40271014）
作者简介:李英奎（1970- ），男，博士，2001年北京大学环境学院毕业，现为美国普渡大学地球与环境科学学系访问学者，主要从事地表过程、环境及GIS等方面研究。

更新日期/Last Update: 1900-01-01