Computer Science
Scientific paper
Oct 1967
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.1843k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 31, Issue 10, pp.1843-1844
Computer Science
7
Scientific paper
Analyses of coexisting minerals and interstitial groundmass in a few chondrules of the Mezö-Madaras chondrite show that the chondrules are the products of several complex and overlapping processes. For example, the glassy groundmass in two well preserved chondrules varies in composition with distance from the surface, and it is concluded that condensation and/or vaporization took place during the final stage of chondrule formation. The composition of the interstitial material varies from nepheline to systems oversaturated in silica. These variations and the occurrence of extremely "unequilibrated" chondrules show that the Mezö-Madaras has not been subjected to any thermal metamorphism. Partly "equilibrated" chondrules coexist with "unequilibrated" ones. The former, therefore, must have obtained their present compositional features before the agglomeration, and it is most likely that the equilibration was caused by crystallization from strongly undercooled melts.
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