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Geochimica et Cosmochimica Acta, 1962
Abstract The concept of chondrites as metamorphic rocks is examined. Mineralogies of four chondrites whose textures indicate different degrees of thermal recrystallization are presented. It appears that relatively unmetamorphosed or “primary” chondritic material consisted of reduced chondrules (metallic iron, magnesian silicates) in an oxidized ...
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Abstract The concept of chondrites as metamorphic rocks is examined. Mineralogies of four chondrites whose textures indicate different degrees of thermal recrystallization are presented. It appears that relatively unmetamorphosed or “primary” chondritic material consisted of reduced chondrules (metallic iron, magnesian silicates) in an oxidized ...
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Space Science Reviews, 1963
The carbonaceous chondrites are a group of stony meteorites characterized by the presence of an appreciable amount of carbonaceous material other than free carbon (diamond and graphite). They have been divided into three subgroups known respectively as Type I, Type II, and Type III.
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The carbonaceous chondrites are a group of stony meteorites characterized by the presence of an appreciable amount of carbonaceous material other than free carbon (diamond and graphite). They have been divided into three subgroups known respectively as Type I, Type II, and Type III.
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Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1988
A compilation of data on 78 elements in the nine groups of chondrites shows each to be isochemical with the exception of a few volatiles. With the exception of the most volatile elements, the groups have solar abundances to within a factor of two. The solar abundances and the chemical and physical properties of phases in the leastaltered chondrites ...
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A compilation of data on 78 elements in the nine groups of chondrites shows each to be isochemical with the exception of a few volatiles. With the exception of the most volatile elements, the groups have solar abundances to within a factor of two. The solar abundances and the chemical and physical properties of phases in the leastaltered chondrites ...
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Physics Today, 1965
Organic compounds that come from outer space in meteorites are probably relics of a primordial gas phase, conclude Martin Studier (Argonne National Laboratory), Ryoichi Hayatsu, and Edward Anders (both of the University of Chicago). Moreover the gas phase was probably the solar nebula, and during planetary evolution the organics were probably formed ...
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Organic compounds that come from outer space in meteorites are probably relics of a primordial gas phase, conclude Martin Studier (Argonne National Laboratory), Ryoichi Hayatsu, and Edward Anders (both of the University of Chicago). Moreover the gas phase was probably the solar nebula, and during planetary evolution the organics were probably formed ...
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Geochimica et Cosmochimica Acta, 1966
Abstract Fifteen enstatite chondrites have been recognized: Abee, Adhi Kot, Atlanta, Bethune, Blithfield, Daniel's Kuil, Hvittis, Indarch, Jajh deh Kot Lalu, Khairpur, Kota-Kota, Pillistfer, St. Mark's, Saint-Sauveur and Ufana. Their essential minerals are enstatite and/or clinoenstatite (40–60%), kamacite (20–28%), troilite (7–15%), and sometimes ...
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Abstract Fifteen enstatite chondrites have been recognized: Abee, Adhi Kot, Atlanta, Bethune, Blithfield, Daniel's Kuil, Hvittis, Indarch, Jajh deh Kot Lalu, Khairpur, Kota-Kota, Pillistfer, St. Mark's, Saint-Sauveur and Ufana. Their essential minerals are enstatite and/or clinoenstatite (40–60%), kamacite (20–28%), troilite (7–15%), and sometimes ...
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Nature, 1964
GEOCHEMISTS have frequently used the abundances of elements in meteorites as a guide to the overall composition of the Earth. The abundances in the chondritic meteorites have been commonly used on the assumption that they represent the closest approach to the composition, for the non-volatile elements, of the primitive unfractionated material in the ...
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GEOCHEMISTS have frequently used the abundances of elements in meteorites as a guide to the overall composition of the Earth. The abundances in the chondritic meteorites have been commonly used on the assumption that they represent the closest approach to the composition, for the non-volatile elements, of the primitive unfractionated material in the ...
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CO3 Chondrites: Metamorphic Sequence and Interclassification with Ordinary Chondrites
2005Metamorphic grade of 7 CO chondrites is determined based on structural order of the Organic Matter. Petrographic types are attempted by interclassification with ordinary chondrites and are confronted with petrographic tracers.
Bonal, Lydie +4 more
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