Results 211 to 220 of about 19,575 (244)
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The Journal of Geology, 1947
The average composition, with respect to iron, nickel, and cobalt, of iron meteorites and the metal of stony meteorites has been determined by statistical study of the analyses of 320 meteorites. The average composition of iron meteorites is: Fe, 90.78 ± 0.26 per cent; Ni, 8.59 ± 0.24 per cent; Co, 0.631 ± 0.019 per cent. The average composition of the
Harrison Brown, Claire Patterson
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The average composition, with respect to iron, nickel, and cobalt, of iron meteorites and the metal of stony meteorites has been determined by statistical study of the analyses of 320 meteorites. The average composition of iron meteorites is: Fe, 90.78 ± 0.26 per cent; Ni, 8.59 ± 0.24 per cent; Co, 0.631 ± 0.019 per cent. The average composition of the
Harrison Brown, Claire Patterson
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Isotopic composition of silicon in meteorites
Geochimica et Cosmochimica Acta, 1986Abstract Samples of bulk meteorites show only mass-dependent fractionation of silicon isotopes. No isotopic anomalies were found. The variation of the ratios 29 Si/ 28 Si and 30 Si/ 28 Si over the meteorite classes is small; 1%. per mass unit difference.
Carol Molinivelsko +2 more
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Composition of Igneous Rocks, Stony Meteorites, and Iron Meteorites
1942ContentsPageTable 11. Average chemical analyses of certain types of plutonic igneous rocks (R. A. Daly)22. Approximate mineral compositions of principal types of plutonic igneous rocks (E. S. Larsen)33. Composition of stony meteorites (L. LaForge)44. Composition of iron meteorites and meteoritic iron (L.
R. A. Daly, E. S. Larsen, L. LaForge
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The Composition of Meteoritic Matter: I. The Composition of the Silicate Phase of Stony Meteorites
The Journal of Geology, 1947A statistical study has been made of the analyses of the silicate phases of 107 selected stony meteorites. Frequency-distribution curves have been plotted, and arithmetic means, together with standard deviations and precisions, have been calculated for the major constituents.
Harrison Brown, Claire Patterson
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The Journal of Geology, 1938
Convincing evidence has been found that the generally accepted ideas regarding the average composition of meteorites are incorrect, owing to the fact that collections have not been completely representative.
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Convincing evidence has been found that the generally accepted ideas regarding the average composition of meteorites are incorrect, owing to the fact that collections have not been completely representative.
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THE COMPOSITION OF THE CHASSIGNY METEORITE
Meteoritics, 1976Spark source mass spectrometric analysis of the Chassigny meteorite has given the following data (in ppm): Rb 0.4, Sr 7.2, Y 0.64, Zr 1.5, Nb 0.32, Ba 7.1, La 0.39, Ce 1.12, Pr 0.13, Nd 0.54, Sm 0.11, Eu 0.038, Gd 0.11, Tb 0.02, Dy 0.12, Ho 0.03, Er 0.09, Yb 0.10, Pb 1.0, Th 0.057, U 0.021.
Brian Mason +3 more
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THE COMPOSITION OF THE JOHNSTOWN METEORITE
Meteoritics, 1971A new analysis of the Johnstown meteorite, a hypersthene achondrite, gives the following results (weight percent): SiO2 53.48, TiO2 0.12, Al2O3 1.43, Cr2O3 0.83, FeO 15.63, MnO 0.54, MgO 25.87, CaO 1.40, Na2O 0.04, K2O 0.00, P2O5 0.00, H2O+ <0.1, H2O‐ 0.05, Ni <0.05, Co <0.01, FeS 1.18, sum 100.57.
Brian Mason, E. Jarosewich
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Presolar Grains in Meteorites and Their Compositions
Space Science Reviews, 2007Small amounts of pre-solar “stardust” grains have survived in the matrices of primitive meteorites and interplanetary dust particles. These grains—formed directly in the outflows of or from the ejecta of stars—include thermally and chemically refractory carbon materials such as diamond, graphite and silicon carbide; as well as refractory oxides and ...
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Composition and structure of meteorites
Bulletin of the United States National Museum, 1930USNM_index ...
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