Clay mineral‐organic matter relationships in the early solar system
Clay mineral‐organic matter relationships in the early solar system
复制标题
早期太阳系中粘土矿物-有机物质的关系
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
I. Gilmour
中科院分区：
文献类型：
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作者：
V. Pearson;M. Sephton;A. Kearsley;P. Bland;I. Franchi;I. Gilmour
随着太阳系的形成，它继承并延续了丰富的有机化学，其分子产物保存在古老的外星物体中，如碳质陨石。这些富含有机物的陨石为早期太阳系中生命起源所采取的化学步骤提供了宝贵而有形的记录。球粒有机物存在于无机陨石基质中，在CM和CI陨石中，含有母小行星上液态水蚀变的证据。一个尚未回答的基本问题是，在何种程度上的有机质和无机产品的水蚀变相互作用或显示相互依赖？我们使用了有机标记技术，揭示了陨石有机质与粘土矿物密切相关。这种关联表明，在早期地球生命起源之前，粘土矿物可能在早期太阳系的化学演化中起着重要的捕获和催化作用。
Abstract— As the solar system formed, it inherited and perpetuated a rich organic chemistry, the molecular products of which are preserved in ancient extraterrestrial objects such as carbonaceous chondrites. These organic‐rich meteorites provide a valuable and tangible record of the chemical steps taken towards the origin of life in the early solar system. Chondritic organic matter is present in the inorganic meteorite matrix which, in the CM and CI chondrites, contains evidence of alteration by liquid water on the parent asteroid. An unanswered and fundamental question is to what extent did the organic matter and inorganic products of aqueous alteration interact or display interdependence? We have used an organic labelling technique to reveal that the meteoritic organic matter is strongly associated with clay minerals. This association suggests that clay minerals may have had an important trapping and possibly catalytic role in chemical evolution in the early solar system prior to the origin of life on the early Earth.