地外样品的钙同位素组成及其在天体化学领域中的应用  

Calcium Isotope Compositions of Extraterrestrial Materials and Their Application in the Field of Cosmochemistry

作　　者：薛永丽 刘芳[1] 夏志鹏 缪秉魁 李欣 XUE Yong-li;LIU Fang;XIA Zhi-peng;MIAO Bing-kui;LI Xin(State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Institution of Meteorites and Planetary Materials Research ,Key Laboratory of Planetary Geological Evolution at Universities of Guangxi Province,Guilin University of Technology,Guilin Guangxi 541004,China)

机构地区：[1]中国科学院广州地球化学研究所,同位素地球化学国家重点实验室,广州510640 [2]中国科学院大学,北京100049 [3]桂林理工大学行星地质演化广西高校重点实验室,广西隐伏金属矿产勘查重点实验室,广西桂林541004

出　　处：《矿物岩石地球化学通报》2018年第5期859-869,共11页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金项目(41773062)

摘　　要：陨石稳定同位素研究是探索太阳系物质起源与演化的重要窗口,也是类比认识地球早期过程的重要方法。本文以钙同位素为代表,归纳总结了陨石钙同位素质量相关分馏与核合成异常的研究进展,阐述了陨石钙同位素特征对于理解早期太阳星云演化及探究小行星早期地质过程的重要意义。尽管仍有许多尚待解决的科学问题,但随着钙同位素研究的深入,尤其是钙同位素高温分馏机理的不断完善,钙同位素在天体化学领域必定会有更广阔的应用前景。Stable isotopic data of meteorites provide a new insight to explore the origin and evolution of the early solar system and the Earth.In this paper,by focusing on the calcium isotopes,we summarized the latest progress on the cosmochemistry of mass-dependent calcium isotope fractionation and mass-independent calcium isotope nucleosynthetic anomalies in meteorites,which are important to understand the evolution of the early solar system and the early geological processes of asteroids.Although many scientific issues are remained to be solved,with the further development of the calcium isotopes,especially the continuously improvement of the calcium isotope fractionation mechanism in high temperature,it is believed that calcium isotopes will have a broader and more effective application prospect in the field of cosmochemistry.

关 键 词：钙同位素 地外样品 质量相关 同位素异常 示踪 

分 类 号：P595[天文地球—地球化学]