Results 131 to 140 of about 1,765 (166)

Isotopic composition of germanium in meteorites

Journal of Geophysical Research, 1963
The isotopic composition of germanium in eight meteorites was measured by solid-source mass spectrometer and compared with a sample of terrestrial origin. No difference in the isotopic composition of germanium from meteorites and the terrestrial sample was found outside of the error. (auth)
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Origin, age, and composition of meteorites

Space Science Reviews, 1964
This paper attempts to bring together and evaluate all significant evidence on the origin of meteorites. The iron meteorites seem to have formed at low pressures. Laboratory evidence shows that the absence of a Widmanstatten pattern in meteorites with > 16% Ni cannot be attributed to high pressures, but to supercooling or an unusually fast cooling rate
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THE CHEMICAL COMPOSITION AND CLASSIFICATION OF THE KAROONDA METEORITE

Meteoritics, 1979
New bulk compositional results are presented for the Karoonda meteorite which show that it is a member of the Vigarano type carbonaceous chondrites. Use of the petrographic symbol CK for Karoonda is shown to be unnecessary and inadvisable.
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The isotopic composition of rocks of the earth and of meteorites

Geochimica et Cosmochimica Acta, 1958
The results of a comparative study of the isotopic composition of the cosmic materials accessible to direct investigation, of the deep igneous rocks of the earth, and of the stony and iron meteorites are discussed. (J.E.D.)
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The isotopic composition of silver in iron meteorites

Geochimica et Cosmochimica Acta, 1962
Abstract Microgram quantities of silver were extracted from the troilite of Toluca iron meteorite and the metal phases of Sikhote Alin and Canyon Diablo meteorites using anion-exchange techniques. Isotopic analysis of silver in iron meteorites indicates a 2–3 per cent higher Ag 107 Ag 109 ratio relative to the terrestrial silver.
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Isotopic Composition of Silver in an Iron Meteorite

Physical Review Letters, 1960
The isotopic composition of silver in the troilite of the Toluca iron meteorite was determined mass spectrometrically and the Ag/sup 107//Ag/sup 109/ ratio found to be 1.097 plus or minus corresponding to a Ag/sup 107/ enrichment of approximately 2% relative to terrestrial silver. The excess Ag/sup 107/ result is discussed in terms of Pd/sup 107/ decay,
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The mineralogical composition and structure of the Assisi meteorite

Mineralogical Magazine and Journal of the Mineralogical Society, 1967
SummaryThe principal data about the fall and the distribution of the fragments of the Assisi (Perugia, Italy) meteorite are collected. A fragment of the stone, weighing 146·5 g, preserved in the British Museum (Natural History) (B.M. 63621), is described in some detail. Crust morphology, mineralogical composition, and structure are studied.
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The Composition of Meteoritic Matter and the Origin of Meteorites

Science, 1949
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Relative Atomic Solar System Abundances, Mass Fractions, and Atomic Masses of the Elements and Their Isotopes, Composition of the Solar Photosphere, and Compositions of the Major Chondritic Meteorite Groups

Space Science Reviews, 2021
Katharina Lodders, Lodders Katharina
exaly  

The Isotopic Composition of Meteoritic Copper

Physical Review, 1947
Harrison Brown, M. G. Inghram
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