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Composition and origin of enstatite in E chondrites
Journal of Geophysical Research: Solid Earth, 1984Our petrologic and electron‐probe study of enstatite in six EH3, 4, and 5 chondrites, including the previously undescribed Allan Hills A77156, provides no support for Leitch and Smith's [1982] model in which crystals and liquids from two chemically distinct, partially molten planetesimals are mixed.
Susan G. McKinley +2 more
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The lithophile trace elements in enstatite chondrites
Geochimica et Cosmochimica Acta, 2014We report on the abundances of a selected set of lithophile trace elements (namely REEs, Y, Rb, Ba, Sr, Zr, Hf, Nb, Th, U) in a comprehensive suite of enstatite chondrites (EC - 13 EH and 11 EL). EH3 and EL3 display only minor deviations from chondritic distributions for these elements. In most metamorphosed EC, a wide range of compositions is observed
Barrat, Jean-Alix +3 more
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Silicon in the Metal Phase of Enstatite Chondrites
Nature, 1960I HAVE recently measured the lattice parameters of the metal phases from a number of chondrites. In five common varieties the kamacite lattice parameter was within the range 2.8682 ± 0.0005 A. This corresponds to an average of 5 per cent nickel in solid solution1.
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Abstract Although enstatite chondrites constitute only 1.5% of well-documented meteorite falls, they are distinctive in being the most highly reduced chondrites. The two main enstatite-chondrite groups—EH (high bulk iron, high siderophiles) and EL (low bulk iron, low siderophiles)—differ in bulk oxidation state and in their abundance ...
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Elemental fractionations among enstatite chondrites
Geochimica et Cosmochimica Acta, 1975Abstract Neutron activation data on 14 elements in eight enstatite-chondrite falls are reported. These and literature data on an additional 28 elements show that intragroup elemental fractionations generally fall into one of three basic patterns: 1.
Philip A Baedecker, John T Wasson
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Chemical and physical studies of type 3 chondrites—V: The enstatite chondrites
Geochimica et Cosmochimica Acta, 1985Abstract We report instrumental neutron activation analysis determinations of 19 major, minor and trace elements in three enstatite chondrites. Based on these, and literature data on the bulk and mineral composition of enstatite chondrites, we discuss the history of the type 3 or unequilibrated enstatite chondrites, and their relationship with the ...
Karen S. Weeks, Derek W.G. Sears
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Application of the sphalerite cosmobarometer to the enstatite chondrites
Geochimica et Cosmochimica Acta, 1989Sphalerite is a minor constituent of a number of enstatite chondrites. The assemblage sphalerite-troilite-kamacite buffers the iron content of sphalerite so that it is a function of temperature and pressure only. High iron contents in sphalerite in enstatite chondrites are consistent with equilibration at low pressures.
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Nitrogen abundances in enstatite chondrites
Earth and Planetary Science Letters, 1969Carleton B. Moore +2 more
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RELICT FORSTERITE IN UNEQUILIBRATED ENSTATITE CHONDRITES
2019NHM ...
Almeida, NV +3 more
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39Ar‐40Ar chronology of the enstatite chondrite parent bodies
, 2014J. Hopp +4 more
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