@article{oai:nipr.repo.nii.ac.jp:00001719,
 author = {Takeda, Hiroshi and Mori, Hiroshi and Ikeda, Yukio and Ishii, Teruaki and Yanai, Keizo},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Dec},
 note = {P(論文), Lithic clasts and mineral fragments in Yamato-79 howardites, Y-790727,Y-791208 and Y-791492 have been investigated by optical microscopy, electron microprobe and single crystal X-ray diffraction. These howardites are chemically intermediate between ordinary diogenites and eucrites, and distinct from Y-7308. Some lithic clasts are also intermediate in mineralogy between endmember diogenites and eucrites, including a cumulate eucrite clast with a partly inverted pigeonite, an ordinary eucrite-like gabbroic clast intermediate in chemical composition between cumulate eucrites and ordinary eucrities, and an augite rich clast with a silica mineral. A partial melting model and fractional crystallization models have been compared to account for these new howardites, and models involving two-stage process are proposed. These howardites may have been products of excavation by an impact or impacts shallower than that for Y-7308 but deeper than those for polymict eucrites.},
 pages = {81--101},
 title = {Antarctic howardites and their primitive crust},
 volume = {35},
 year = {1984}
}