Chemistry of agglutinate fractions in lunar soils
Chemistry of agglutinate fractions in lunar soils
复制标题
月球土壤中凝集组分的化学
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
M. Charette
中科院分区：
文献类型：
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作者：
J. Rhodes;K. V. Rodgers;J. Jacobs;J. Brannon;J. Adams;D. Blanchard;L. Haskin;M. Charette
凝集物是由玻璃结合在一起的结晶颗粒和岩屑的聚集体。据认为，玻璃状的凝集物是在月球风化层的上表面形成的，是由于流星体和微流星体的撞击，使土壤颗粒熔化和焊接而形成的。本文描述了一项调查，其中散装土壤被分为“凝集”和“nonagglutinate”部分。分析所获得的馏分的主要，次要和微量元素。所获得的化学数据的凝集和nonagglutinate组分的月球土壤表明，镁铁质和大多数亲石元素相对于散装土壤中富集的镁铁质玻璃。提出了一个模型，涉及优先熔化和同化的中稳态物质和镁铁质土壤成分的观测到的化学数据。有人建议，玻璃状凝集物可能更容易形成在镁铁质土壤中比在更多的钙长石的。这种选择性应该是最有效的之间的母马和高地土壤，但可能会在更本地化的规模。
Agglutinates are aggregates of crystalline grains and lithic fragments bonded together by glass. It is thought that glassy agglutinates are formed at the upper surface of the lunar regolith by impact-related melting and welding of soil particles, in response to meteoroid and micrometeoroid bombardment. A description is presented of an investigation in which bulk soils were separated into 'agglutinate' and 'nonagglutinate' fractions. The obtained fractions were analyzed for major, minor, and trace elements. The obtained chemical data for agglutinate and nonagglutinate fractions of lunar soils indicate that agglutinitic glass is enriched in mafic and most lithophile elements relative to the bulk soils. A model involving preferential melting and assimilation of mesostasis material and mafic soil components is proposed to account for the observed chemical data. It is suggested that glassy agglutinates may form more readily in mafic soils than in more feldspathic ones. Such selectivity should be most effective between mare and highland soils, but may possibly operate on a more local scale.