Progressive alteration in CV3 chondrites: More evidence for asteroidal alteration

Aqueous Alteration of Carbonaceous Chondrites: Evidence for Asteroidal

Progressive Alteration of Cm Chondrites: Effects on Refractory Inclusions

CM chondrites are aqueously altered rocks that contain ~9 wt.% H2O (indigenous water) [1] bound in phyllosilicates [2-4]; also present in the matrix are serpentinetochilinite intergrowths (PCP), pentlandite, and Ni-bearing pyrrhotite. The extent of alteration varies from meteorite to meteorite. Some CM chondrites contain well-delineated metallic-Fe-Ni-bearing, olivineand pyroxene-rich chondrule...

Evidence for Aqueous Alteration in Ordinary Chondrites from Compositional and Oxygen Isotopic Trends in an Exotic

ORDINARY CHONDRITES FROM COMPOSITIONAL AND OXYGEN ISOTOPIC TRENDS IN AN EXOTIC FRAGMENT. K.A. Dyl, A. Bischoff, K. Ziegler, K. Wimmer, E.D. Young, Department of Earth and Space Sciences, UCLA, Los Angeles, CA 90095 ([email protected]), Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany, Institute of Geophysics and Planetary Physics, UCLA, Los Angeles, CA 90095, Suedendstr. 1, ...

4.4 Ga Alteration of Chondrules in Allende (cv3) Parent Body: Evidence from the Rb-sr System

Introduction: It has been revealed that both of the thermal and aqueous alteration had occurred in the CV parent body [1, 2, 3]. To give a constraint to the alteration processes, the Allende meteorite can be a best example, because the following results indicate that the Allende is the strongest altered meteorite among the CV chondrites, those are: (a) homogeneity of the olivine in matrix of th...

Petrology of Amoeboid Olivine Aggregates in Antarctic CR chondrites: Evidence for Aqueous Alteration and Shock Metamorphism

Alteration and Shock Metamorphism. M. Komatsu, T. J. Fagan, A. Yamaguchi, T. Mikouchi, M. Yasutake, and M. E. Zolensky SOKENDAI, The Graduate University for Advanced Studies, Kanagawa, Japan ([email protected]), Dept. Earth Sciences, Waseda University, Japan, National Institute of Polar Research (NIPR), Japan, Dept. Earth and Planetary Science, The University of Tokyo, Japan, ARES, NA...