The abundances of C, O, S, Na, K, Li, Mn, P, Cr, Si, Fe, Mg, Ni, Co, V, Ca, Ti, Al and Sc were determined in-situ in a sample of the Allende meteorite using a laser ablation/ionization mass spectrometer to quantify the bulk chemical composition of the matrix and its spatial chemical variability.

The high lateral resolution of the instrument makes it possible to measure the elemental composition of Allende matrix, without any sample treatment prior to analysis. The measurements of solely Allende matrix allow investigating the variability of the element abundances in the matrix material on different scales from 50 ​μm to 0.5 ​mm.

The comprehensive data set provides constraints on models for the formation of matrix material of carbonaceous chondrites in the solar nebula. A key observation of this study is a high degree of chemical homogeneity of the matrix, indicating that it formed independently from or in parallel with the chondrules and that the process that led to the formation of the parent body was a fast collapse of the dust-gas cloud following chondrule formation.

在样品中原位测定了 C、O、S、Na、K、Li、Mn、P、Cr、Si、Fe、Mg、Ni、Co、V、Ca、Ti、Al 和 Sc 的丰度阿连德陨石使用激光烧蚀/电离质谱仪来量化基质的整体化学成分及其空间化学变异性。

该仪器的高横向分辨率使得测量阿连德矩阵的元素组成成为可能，而无需在分析前对样品进行任何处理。仅阿连德矩阵的测量允许在从 50 μm 到 0.5 mm 的不同尺度上研究矩阵材料中元素丰度的变异性。

综合数据集为太阳星云中碳质球粒陨石基质材料的形成模型提供了限制。这项研究的一个关键观察结果是基质的高度化学均匀性，表明它独立于球粒形成或与球粒平行，并且导致母体形成的过程是尘埃的快速坍塌——球粒形成后的气体云。