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 porosity caused by gas bubbles, infer the presence of little cracks and reveal different shapes in its crystal habits including subhedral pyroxene phases, Ca phosphates and rounded sulphide and/or sulphates structures. 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 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.

台式微X射线荧光光谱法（μ-XRF）和微计算机断层扫描（μ-CT）的组合潜力已被用于描述西北地区历史的矿物结构，矿物相的类型和分布以及地质限制非洲（NWA）8657黑云母火星陨石。样品的3D渲染用于计算由气泡引起的孔隙率，推断是否存在小裂纹并揭示其晶体习性的不同形状，包括亚面辉石相，磷酸钙和圆形硫化物和/或硫酸盐结构。通过将有关元素分布的化学信息与根据其相对密度进行细分的矿物类别进行比较，可以实现相区分。特别是斜长石/遮盖石相与磷酸盐之间的关系，揭示了钙-辉石和蒙脱石的化学区带以及以K-硫酸盐和Fe-硫化物形式存在的S轴承相，从而可以令人满意地重建陨石的历史。这项工作中使用的组合方法的成功执行显示出有希望将其进一步应用于其他类型的陨石。