Elemental Abundance Constraints on Condensation of Allende Matrix Olivine
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Elemental and Isotopic Abundances of Lithium in Chondrule Constituents in the Allende Meteorite
ALLENDE METEORITE. T. Kunihiro, S. Maruyama, M. Watanabe, and E. Nakamura, The Pheasant Memorial Laboratory, Institute for the Study of the Earth’s Interior, Okayama University, Japan ([email protected]) Introduction: Most carbonaceous and ordinary chondrites—long touted as primordial material and relatively unchanged since their formation—have been altered by interaction with aqueous ...
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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...
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We have measured the scattering matrix as a function of the scattering angle of randomly oriented particles of a Mg-rich olivine sample and a ground piece of Allende meteorite as cometary analogues using lasers at two wavelengths (442 nm and 633 nm). The elements of the scattering matrix, Fij , depend on the scattering angle, the wavelength of the laser light, and on the size, shape and refract...
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Introduction: It is generally accepted that in addition to igneous olivine grains, chondrules contain relict olivine grains that did not crystallize in situ [e.g., 1]. Chondrule melts cooled relatively fast [e.g., 2], which aided in the preservation of relict grains. One type of relict olivine grain, found both inside chondrules and as isolated olivine grains outside chondrules, and found both ...
متن کاملIron Isotope Composition of Allende and Chainpur Chondrules: Effects of Equilibration and Thermal History
Introduction: We have studied the petrography and Fe-isotope composition of seven chondrules, four from the Allende (CV3) carbonaceous chondrite and three from the Chainpur (LL3.4) ordinary chondrite. Three textural-chemical chondrule types are represented within this sample set: (1) BO, (2) RP and (3) PO/POP. These textural differences allow us to exa mine the Fe-isotope composition in materia...
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