2009年 53Mn-53Cr systematics of Allende chondrules and ε54Cr―Δ17O correlation in bulk carbonaceous chondrites 40th Lunar and Planetary Science Conference Yin, Q. Z, Yamashita, K, Yamakawa, A, Tanaka, R, Jacobsen, B, Ebel, D, Hutcheon, I. D, Nakamura, E