Meteorites Asuka

Nishiizumi K., Arnold J. R., Caffee M. W., Finkel R. C., Southon J., and Reedy R. C. (1992a) Cosmic ray exposure histories of lunar meteorites Asuka 881757, Yamato 793169 and Calcalong Creek. In 17th Symp. Antarctic Meteorites. Natl. Inst. Polar Res., Tokyo, Japan, pp. 129-132. 

The meteorites recovered by Japanese scientists from 1966 to 1994 were listed by Yanai and Kojima (1995) who also provided chemical analyses of a large number of specimens that originated from the Yamato Mountains, Asuka Station, Sor Rondane Mountains, Allan Hills, Bates Nunatak, Derrick Peak, and Mt. Baldr. Three of the specimens listed by Yanai and Kojima (1995) are lunar meteorites Asuka-881757, Yamato-793274, and Yamato-793169. The compilation includes color photographs of 12 specimens of different kinds of stony meteorites including A-881757 from the Moon. 

Misawa K, Tatsumoto M, Drilrymple GB, Yrmai K (1993) An extremely low U-Pb source in the Moon U-Th-Pb, Sm-Nd, Rb-Sr, and Ar Ar isotopic systematics ruid age of lunar meteorite Asuka 881757. Geochim Cosmoshim Acta 57(19) 4687-4702... 

Yanai K. (1994) Angrite Asuka-881371 priliminary examination of a unique meteorite in the Japanese collection of antarctic meteorites. Proc. NIPR Symp. Antarct. Meteorit. 7, 30-41. 

Extractable C6-C22 aromatic compounds from the Murchison (CM2) and Asuka-881458 (CM2) meteorites also appear to follow a systematic trend when their 5 C values are plotted against carbon number (Figure 3), although benzene and toluene from Murchison and naphthalene and biphenyl from Asuka-881458 are clear outliers. The 5 C values of many of the aromatic compounds extracted (e.g., Asuka-881458 fluoranthene —8.3%c) are markedly... 

Mikouchi T., McKay G., and Le L. (2000b) A new angrite Sahara 99555 mineralogical comparison with Angra dos Reis, Lewis Cliff 86010, Lewis Cliff 87051, ad Asuka 881371 angrites. Antorcr. Meteorit. XXV, 74-76. 

Premo W. R. andTatsumoto M. (1995) Pb isotopic systematics of angrite Asuka-881371. Antarct. Meteorit. XX, 204-206. 

Warren P. H., Kallemeyn G. W., and Mayeda T. (1995) Consortium investigation of the Asuka-881371 angrite bulk-rock geochemistry and oxygen-isotopes. Antarct. Meteorit. XX, 261-264. 

Weigel A., Eugster O., Koeberl C., and Krahenbuhl U. (1997) Differentiated achondrites Asuka 881371, an angrite, and Divnoe noble gases, ages, chemical composition, and relation to other meteorites. Geochim. Cosmochim. Acta 61, 239-248. 

Thalmann C., Eugster O., Herzog G. F., Klein J., Krahenbiihl U., Vogt S., and Xue S. (1996) History of lunar meteorites Queen Alexandra Range 93069, Asuka 881757 and Yamato 793169 based on noble gas isotopic abundances, radionuclide concentrations and chemical composition. Meteorit. Planet. Sci. 31, 857-868. 

Mass-weighted means of literature data only pristine basalts are shown (mare-dominated polymict breccias are excluded). Mass-weighted mean of literature data for Y-793169 and Asuka-881757 probably paired mare-basaltic meteorites. Average of the eight major Apollo/Luna varieties shown above. 

Figure 7.6. Plagioclase glass in the Asuka-881757 lunar meteorite is surrounded by radiating expansion cracks in pyroxene, (a) reflected light, (b) transmitted light, and (c) cross polarized light. The scale bar is 200 pm...

Direct evidence for the abiotic presence of fatty acids comes from the detection of fatty acids in the interior of the Murray and Murchison carbonaceous chondrite meteorites from Australia (up to C8), as well as an Asuka carbonaceous chondrite meteorite (A-881458) from Antarctica (up to C12) [84-87]. Fatty acids are relatively abundant in these meteorites, being 20 times more abundant than amino acids in the organic extract of A-881458. Indeed, organic extracts from the Murchison meteorite form boundary membranes when rehydrated [88, 89]. The presence of fatty acids is particularly suggestive because the chemical composition of these meteorites is believed to resemble that of the early solar system. 

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