Chemical compositions of chondrules and matrices in the ALH-77015 chondrite (L3)

• Main Authors: Fujimaki, Hirokazu, Matsu-ura, Mikio, Sunagawa, Ichiro, Aoki, Ken-ichiro
• Language: English
• Published: 1981
• Subjects: Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/record/1211/files/KJ00000011737.pdf

P(論文) The chondrules and matrices in ALH-77015 chondrite (L3) were analyzed with an electron probe microanalyzer. The matrices are relatively homogeneous, whereas the chondrules show a wide compositional variation. There is a clear compositional gap between the matrices and the chondrules and between olivines in the chondrules and those in the matrix. Fragmentation of chondrules cannot explain the chemistry of the matrices. A clear correlation between Ca and Al has been noted in the chondrules. The correlation can be interpreted by assuming that the chondrules were formed from the solar nebula through the crystallization of anorthite and Ca-rich pyroxene. departmental bulletin paper