Matrix textures in unequilibrated ordinary chondrites

Details Matrix textures in unequilibrated ordinary chondrites Matrix textures in unequilibrated ordinary chondrites

Publishing date

May 1977

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..35...25a&link_type=abstract

Journals

Earth and Planetary Science Letters, vol. 35, no. 1, May 1977, p. 25-34.

Science

Other

Additional info 2

17

Additional info 3

Chondrites, Electron Microscopy, Microstructure, Textures, Chondrule, Particle Size Distribution, Photomicrographs, Porosity, Recrystallization

Type

Scientific paper

Abstract

High-voltage electron microscope observations are reported for specimens of the meteorites Hedjaz, Parnallee, Chainpur and Weston. Clastic matrix in Weston and Chainpur is distinguished from non-clastic material found in the other two specimens and in dark rims around chondrules in Chainpur. The variety of grain-size distributions and porosities found in this type of matrix is interpreted in terms of grain growth during the aggregation of the meteorite, and incipient solid-state recrystallization of aggregates (metamorphism). The formation of fine-grained non-clastic aggregates with low porosity was not accompanied by sufficient diffusion within the aggregates to equilibrate the mineral assemblages.

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