@article{oai:nipr.repo.nii.ac.jp:00001209,
 author = {Ikeda, Yukio and Kimura, Makoto and Mori, Hiroshi and Takeda, Hiroshi},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Dec},
 note = {P(論文), The matrices of six unequilibrated O chondrites and one C chondrite, ALH-764 (LL3), Y-74191 (L3), ALH-77015 (L3), ALH-77033 (L3), ALH-77249 (L3), ALH-77299 (H3) and ALH-77003 (C3), were analyzed and classified into types I and II on the basis of their chemical compositions. The bulk chemical composition of the type I matrix is represented roughly by mixtures of ferrous olivine and sodic plagioclase. The type II matrix resembles the matrices of C2 and C3 chondrites in chemical composition.},
 pages = {124--144},
 title = {Chemical compositions of matrices of unequilibrated ordinary chondrites},
 volume = {20},
 year = {1981}
}