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could be found in stone, iron, and stony-iron meteorites. Features of meteoritical structure formation were determined by the influence of space vacuum, extremely high and low temperatures, slow cooling (about tens of Kelvins per million years and lower

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Central European Geology
Authors: Ildikó Gyollai, Ákos Kereszturi and Elias Chatzitheodoridis

Introduction The Zagami meteorite fell on October 3, 1962, about 0.75 miles from Zagami Rock, Katsina Province, Nigeria ( Graham et al. 1985 ). It was the second meteorite found to contain a significant amounts of trapped

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Wiik, H., B. 1969: On regular discontinuities in the composition of meteorites. - Soc. Fennica Commentaciones Phys. Math., 34, pp. 135 - 145 . On regular discontinuities in the

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Central European Geology
Authors: Ildikó Gyollai, Ildikó Gyollai, Szaniszló Bérczi, Krisztián Fintor, Szabolcs Nagy and Arnold Gucsik

Solar System: Planetary and material mapping of the lunar rocks and meteorites) . — Budapest, Hungary. (in Hungarian) Bérczi , Sz. , S. Józsa , Zs. Kovács , B. Lukács , Gy. Szakmány

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Central European Geology
Authors: Szabolcs Nagy, Sándor Józsa, Arnold Gucsik, Szaniszló Bérczi, Kiyotaka Ninagawa, Hirotsugu Nishido, Miklós Veres, Ákos Kereszturi and Henrik Hargitai

References N.A. Artemieva B. Ivanov 2004 Launch of Martian meteorites in oblique impacts

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Interstellar grains in primitive meteorites — Diamond, silicon carbide, and graphite Meteoritics 28 490 514 . C

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Abstract  

A stone of brick-like shape, measuring roughly 25×12.5×10.5 cm3 and weighing 14 kg was found in 1983, in the western desert of Egypt. The meteorite was named El-Bahrain meteorite and classified as L-chondrite. In the present paper, the principal constituents of El-Bahrain meteorite have been studied by means of Mössbauer spectroscopy. The chemical composition as obtained by the conventional wet analyses of L-chondritic meteorites showed that the meteorite contains 23.38% Fe and 1.23% Ni. While the analysis of the atomic absorption showed the presence of 27.03% as a total iron. The Mössbauer analysis of El-Bahrain meteorite showed that the iron constituent minerals were determined to be olivine, metallic iron-nickel alloys (kamacite, taenite and tetrataenite), ferrous sulfide (troilite) and weathering products such as maghemite and nanocrystalline hematite. The structure of meteoritic iron obtained by the Mössbauer analysis has been discussed on the basis of these constituents.

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7 days after the fall of a stony meteorite its -spectrum has been measured on a Ge/Li/-detector installed in an underground laboratory. The activity of22Na,26Al,40K,48V, and54Mn has been determined.

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Abstract  

Application of a portable radioisotope X-ray fluorescence analyser for the determination of nickel in iron meteorites is described. The error of the XRF method was ±0.5% Ni at the 95% confidence level, which was confirmed by comparison with the results of other authors. In spite of limited accuracy this version of the radioisotope XRF method may find a wide application in meteorite studies, for rapid and non-destructive verification and classification of collected meteorite specimens.

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Abstract  

The 57Fe Mössbauer spectrum of Kaba (Hungary) meteorite was recorded at room and at liquid nitrogen temperatures. The evaluation of the spectrum showed that the iron containing components of the Kaba meteorite are magnetite, maghemite, troilite, fayalite and pentlandite.

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