Primordial noble gases in micrometeorites and interplanetary dust

微陨石和行星际尘埃中的原始惰性气体

• 批准号: 145634614
• 负责人: Dr. Ulrich Ott
• 金额: --
• 依托单位: Max-Planck-Institut für Chemie (Otto-Hahn-Institut)
• 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 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/145634614?language=en
• 关键词: Primordial; noble; gases; micrometeorites; interplanetary

Of all the elements, noble gases have been least affected by secondary processes taking place in and on planetary bodies; accordingly, their inventory in today’s planetary atmospheres resembles most closely that which they acquired in the early days of the Solar System. Among the possible sources, which also may have made an important contribution to other volatile elements or compounds (nitrogen, water), are asteroidal and cometary bodies. The main flux of extraterrestrial material hitting Earth today is in the form of micrometeorites (MMs; sizes on the order of 100 μm); however abundances and isotopic compositions of noble gases in MMs (with the exception of implanted solar wind He and Ne) are practically unknown at this time. The aim of the project is the analysis of all the noble gases in MMs and comparison of elemental and isotopic abundance patterns with those of other known Solar System reservoirs. Analyses will be performed using a new type of noble gas mass spectrometer with multi-ion counting detector, where procedures for gas extraction and separation will first have to be optimized. The measurements shall eventually be extended to include the even smaller interplanetary dust particles (IDPs) collected in the stratosphere.

在所有元素中，稀有气体受行星体内部和表面发生的次生过程的影响最小；因此，它们在当今行星大气中的库存与太阳系早期获得的可能来源最相似。小行星和彗星体也可能对其他挥发性元素或（化合物氮、水）做出了重要贡献。当今撞击地球的外星物质主要以微陨石的形式存在。 （MM；尺寸约为 100 μm）；然而，MM 中稀有气体的丰度和同位素组成（植入的太阳风 He 和 Ne 除外）目前实际上尚不清楚。该项目的目的是分析MM 中的所有惰性气体以及元素和同位素丰度模式与其他已知太阳系储层的比较分析将使用具有多离子计数功能的新型惰性气体质谱仪进行。探测器，首先必须优化气体提取和分离程序，测量最终应扩展到包括平流层中收集的更小的行星际尘埃颗粒（IDP）。