陨石
斜长石
地质学
辉石
火星人
矿物学
地球化学
矿物
化学
石英
天体生物学
火星探测计划
橄榄石
古生物学
物理
有机化学
作者
Carlo Porfido,Paola Manzari,Ignazio Allegretta,Roberto Terzano,Olga De Pascale,Giorgio S. Senesi
出处
期刊:Talanta
[Elsevier]
日期:2020-09-01
卷期号:217: 121114-121114
被引量:3
标识
DOI:10.1016/j.talanta.2020.121114
摘要
The combined potentiality of benchtop micro X-ray fluorescence spectroscopy (μ-XRF) and micro computed tomography (μ-CT) has been applied to describe microstructures, type and distribution of mineralogical phases as well as geological constraints on the history of the North West Africa (NWA) 8657 shergottite Martian meteorite. The 3D rendering of the sample was used to compute its vesiculation, infer the presence of cracks and reveal different shapes in its crystal habits including subhedral pyroxene phases and rounded sulphide and/or sulphates minerals. Phase discrimination was achieved by comparing chemical information about element distribution with mineral classes segmented as a function of their relative density. In particular, the relationships between the plagioclase/maskelynite phase and other minerals such as Ca-phosphates, the chemical zoning of Ca-pyroxenes and maskelynite and the presence of S-bearing phases in the form of K-sulphates and Fe-sulphides were revealed, which allowed reconstructing satisfactorily meteorite history. The successful performance of the combined approach used in this work shows promising for further application to other types of meteorites.
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