Abundances and distribution of volatile trace elements in chondritic meteorites and their components

球粒陨石及其组分中挥发性微量元素的丰度和分布

• 批准号: 146454408
• 负责人: Privatdozent Dr. Frank Wombacher
• 金额: --
• 依托单位: Institut für Geologie und Mineralogie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/146454408?language=en
• 关键词: Abundances; distribution; volatile; trace; elements

Planets and asteroids of the inner solar system are depleted in volatile elements such as Na, K, Zn and Cd. The cause of this depletion is unconstrained. Incomplete condensation of volatile elements is widely thought to be responsible for the pervasive primary depletion, but alternative models such as depletion during chondrule formation or inheritance from the interstellar medium (ISM) have been proposed. The record of primary volatile element depletion is blurred by later volatile element redistribution processes that is evident, e.g., in Ca, Al rich inclusions (CAIs) or ordinary chondrites.The goal of this study is to constrain the processes that led to the depletion and redistribution of volatile elements in early solar system materials by the application of sophisticated analytical techniques to key samples: i) the first high-precision isotope dilution analyses of volatile elements in bulk chondrites and their components (chondrules, matrix, CAIs) and ii) the study of the microdistribution of volatile elements in chondrites by laser ablation ICP-MS.

太阳系内部的行星和小行星缺乏Na、K、Zn和Cd等挥发性元素。这种消耗的原因是不受限制的。挥发性元素的不完全凝聚被广泛认为是普遍的主要耗尽的原因，但其他模型，如球粒形成期间的耗尽或星际介质（ISM）的继承也被提出。初级挥发性元素耗尽的记录被后来的明显的挥发性元素再分布过程所模糊，本研究的目标是通过对关键样品应用复杂的分析技术，限制导致早期太阳系材料中挥发性元素耗尽和重新分布的过程：i）首次对散装矿物及其成分中的挥发性元素进行高精度同位素稀释分析（球粒，矩阵，CAIs）和ii）的挥发性元素在陨石中的微观分布的激光烧蚀ICP-MS的研究。