Chemical and physical studies of type 3 chondrites. V - The enstatite chondrites

Details Chemical and physical studies of type 3 chondrites. V - The enstatite chondrites Chemical and physical studies of type 3 chondrites. V - The enstatite chondrites

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49.1525w&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 49, July 1985, p. 1525-1536. Research supported by the University of Arka

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8

Chemical Composition, Chondrites, Enstatite, Meteoritic Composition, Cosmic Gases, Mineralogy, Nebulae, Neutron Activation Analysis, Meteorites, Chemistry, Physical Properties, Chondrites, Enstatites, Inaa, Samples, Meteorite, Neutron Activation Analysis, Major Elements, History, Minor Elements, Trace Elements, Mineralogy, Composition, Equilibration, Depletion, Shock Effects, Oxygen, Isotopes, Thermal Effects, Chemistry, Lithophiles, Abundance, Siderophiles, Classification, Chalcophiles

Scientific paper

The results of instrumental neutron activation analysis of 19 major, minor, and trace elements in three unequilibrated, or type 3, enstatite chondrites (ECs) are reported. Based on these and the literature data, the relationship between the type 3 ECs and the other ECs is discussed. The abundance of siderophile elements in type 3 ECs places them with the EH, rather than EL chondrites. The chalcophile elements are at the low end of EH range. Cr is intermediate between EH and EL. It is suggested that the type 3 ECs are EH chondrites which have suffered small depletions of certain chalcophile elements through the loss of shock-produced removal of these chalcophiles by the formation of sulfurous veins, and not by weathering. The processes responsible for formation of these and other types of ECs are discussed.

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