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| SOO16-7037( 96)00054-3 Ion microprobe studies of Efremovka CAIs: II. Potassium and 41Ca in the early Solar...potassium isotope composition of refractory phases in Efremovka CAls has been measured by an ion microprobe. Extensive...with high Ca/K ratios (>3 X 105) in all the four Efremovka CAls analysed in this study. The excess 4’K in...0.14) X lo-’ at the time of formation of the Efremovka CAls. We have considered several processes that...best one from plausibility considerations. The Efremovka CAls with excess 4’K also have excess 26Mg that |
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| investigated in 6 monomict, 3 polymict, and the diamond-free ureilite ALH78019 and their acid-resistant...to possible decay of extinct 36Cl in the Efremovka meteorite. Trapped 22Ne in the range of (1.4 –2.5)...gas trapping into their carbon carrier phases (diamond, amorphous C) by ion implantation. Whereas diamonds...understood as a two-component mixture of the unaffected diamond gases and the fractionated (to varying degrees)...Göbel et al., 1978). In diamondbearing ureilites, diamond is the principal gas carrier and 1. INTRODUCTION |
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| 129I the formed 129Xe (129Xe*) was trapped by diamond grains due to nuclear recoil. (2) During thermal...to the minimally thermally metamorphized CO3 meteorite ALHA 77307. With increasing metamorphic grade...onion-shell model of structure and cooling history of meteorite parent bodies where the temperature increases...Lewis (1994a) supposed that 129Xe* was trapped by diamond grains in meteorites as nuclear recoils during...presence of 127I in nanodiamonds of the Efremovka meteorite (Holland et al., 2003) and the increase of |
 | Vogel, Nadia, Baur, Heinrich, Bischoff, Addi, Leya, Ingo, Wieler, Rainer (2004) Noble gas studies in CAIs from CV3 chondrites: No evidence for primordial noble gases. Meteoritics & Planetary Science, 39 (5) 767-778 doi:10.1111/j.1945-5100.2004.tb00118.x | Journal (article/letter/editorial) |
| from the CV3 chondrites Allende, Axtell, and Efremovka. The 20Ne/22Ne ratios of all CAIs studied here...7 and 4.8, with fine-grained CAIs within one meteorite showing higher ratios than the coarse-grained...al. (1996) reported the Ne composition of two Efremovka CAIs to be in agreement with a trapped 20Ne/22Ne...interpreted the Ar isotopic composition of an Efremovka CAI as a mixture of cosmogenic, atmospheric, and...unequilibrated CV3 chondrites Allende, Axtell, and Efremovka. Our analytical technique is particularly suited |
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| the Allende meteorite fell in Mexico, CV3 chondrites have played a major role in meteorite studies. The...Allende quickly became the most widely studied meteorite, a title it still holds today. Initially, studies...diversity of carbonaceous asteroids and to relate meteorite and asteroid types (e.g.,Bell et al., 1989). ...Y-86751 find 200 Reduced Subgroup find Arch 990 s3 Efremovka find 21,000 s4 Leoville find 8100 s3 Vigarano...(data from McSween, 1977b). Symbols as follows: Efremovka (Efr), Leoville (Leo), Vigarano (Vig), Allende |
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| the Pv-ehde preprint MS#4506 Orion star-forming region (Bloemen et al., 1994) has been used as evidence...lines from I2C and 1 6 0 in the Orion star-forming region could not be substantiated (Bloemen et al., 1999)...calcium-aluminum-rich inclusion (CAI) from the Efremovka meteorite by Marhas and Goswami (2000) did not reveal...in 1OB in melilites in CAIs from Allende and Efremovka characterized by low B content (less than a few...pers. comm., 1996), the matrix of the Orgueil CI meteorite (0.78 pprn B and 611B = -3.9 2 0.1%0;Zhai ef al |
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| l6-m.y.-old structure formed by the impact of a meteorite with the Earth. The long history of geological... For example, our largest specimen is a platy diamond with very high relief and a pure white color. The...earlier samples. This is compared with another diamond of approximately 200 pm diameter that was rounded...contain lonsdaleite [31, a high-pressure phase of diamond taken as an indicator of shock processes. We aim...ISOTOPE FRACTIONATION IN THE E2 CAI TYPE A FROM THE EFREMOVKA CV3 CHONDRITE. S. V. Afanassiev', S. G. Simakinz |
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| if the dust (1-10 JIm) in the chondrule-forming region experienced similar conditions to chondrules (100-1000...be possible to explain rim, matrix, and bulk meteorite refractory and common lithophile compositions...Allende meteorite by the method described in [I]. The optical properties of the extracted diamond grains...in the synthetic stellar spectrum, some of the diamond features will disappear at a resolution of R -...CRYSTALLIZATION OF PYROXENE AND SPINEL IN GABBROIC LUNAR METEORITE ASUKA 881757. T. Arai, H. Takeda, and P. H. Warren |
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| records preserved in the interstellar grains of diamond, silicon, carbide and graphite found in meteorites...now possible, thanks to the identification of diamond, silicon carbide and graphite grains in samples...for thermal metamorphism and differentiation of meteorite parent bodies in the early solar system, that...routine! In the case of meteorites, every new meteorite was analyzed when the sample became available...nuclides of interest Principal target elements 3He Diamond C V Garnet Ilmenite Magnetite Quartz Mg, Al |
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| compact group of bodies and form the stable "meteorite swarm" in resonant orbit (Hughes, 1982). A small...from the recent cosmic-ray irradiation of the meteorite; the rest presumably comes from a presolar cosmic-ray...Interstellar amorphous carbon in the Murchison meteorite: Carrier of neon-E(L). Sachiko Amari,' Edward...not show any lines of crystalline C (graphite, diamond), indicating that it is amorphous. A Cal grain...other than the suggestion that the ice in this region is probably close to a steady state condition. |
 | Ouellette, N., Desch, S.J., Bizzarro, M., Boss, A.P., Ciesla, F., Meyer, B. (2009) Injection mechanisms of short-lived radionuclides and their homogenization. Geochimica et Cosmochimica Acta, 73 (17) 4946-4962 doi:10.1016/j.gca.2008.10.044 | Journal (article/letter/editorial) |
| calcium-aluminum-rich inclusion (CAI) from the Allende meteorite by McKeegan et al. (2000). Following this discovery...also been found in hibonites from the Murchison meteorite, at levels that are consistent with the initial...demonstrates that 26Al was present in the accretion region of terrestrial planets and planetesimals at levels...detailed K isotope study of CAIs from the Efremovka meteorite that defined an initial 41Ca abundance of...association between an AGB star and a star-forming region will be coincidental, and not a necessary consequence |
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| it, it was just at this time that the Allende meteorite fell and the minerals contained within the so-called...Silliman Chair and being curator of the Yale meteorite collection. In a continuation of Karl’s foray...chemical histories both in the solar nebula and in meteorite parent bodies. It was in CAIs that the great discovery...interstellar medium, in the solar nebula, in meteorite parent bodies, and during atmospheric entry. Each...realization in the early 1970s that there are natural meteorite concentration mechanisms at work there. There |
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| position of 56Fe; and (iv) the abundance peaks in the region past iron at the neutron closed shell positions...mixing caused by the convection, the entire unstable region evolves essentially chemically homogeneously—replenishing...of burning region (central or shell burning) and depleting the fuel elsewhere in that region at the same...burning of this fuel then commences outside that region. Table 1 summarizes the burning stages and their...maximum temperatures that have been reached in each region in the preceding hydrostatic burning stages (Table |
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| MÖSSBAUER SPECTROSCOPY OF OLIVINES FROM THE D’ORBIGNY METEORITE Y. A. Abdu1, M. E. Varela2 and F. C. Hawthorne1...structural OH bands are observed in the OH-stretching region (3800-3000 cm)1) for all samples. Mössbauer spectroscopy...(d13C approximately 0 to +5&) lining vugs in the meteorite. There are also differences in magmatic carbon...of the Meteoritical Society: Abstracts 5022 METEORITE IMPACT CRATERS IN SOUTH AMERICA: A BRIEF REVIEW...discoveries. The following possible and confirmed meteorite impact structures have been reported for this |
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| Science Tunis, Tunisia, 4 Meteorite Laboratory Lehmweg Gifhorn, Germany, 5 Meteorite Recon Mühlendamm Hamburg...calculation of meteorite flux is possible [4]. Following previous estimation of meteorite flux based on...geographical and morpho-structural district located in NW Argentina. This region is characterized by an extremely...structures in the alluvial fan, or the result of a meteorite shower. Their age, whatever the event is, is very...ANALYSIS (INAA) FOR ELEMENTAL COMPOSITION OF FRESH METEORITE FALL IN ORISSA, INDIA (2003). B. Adur, H.B. Mali |
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| ................ 84 Gases trapped in presolar diamond (HL, P3 and P6 components) ........................ 149 Exposure ages and dynamical models of meteorite delivery .............................................................. 399 Mantle sources of diamond rare gases ......................................first discovered 129Xe excesses in the Richardton meteorite, then wrote that astonishing paper entitled “The...first discovered 129Xe excesses in the Richardton meteorite, then wrote that astonishing paper entitled “The |
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| position of 56Fe; and (iv) the abundance peaks in the region past iron at the neutron closed shell positions...mixing caused by the convection, the entire unstable region evolves essentially chemically homogeneously—replenishing...of burning region (central or shell burning) and depleting the fuel elsewhere in that region at the same...burning of this fuel then commences outside that region. Table 1 summarizes the burning stages and their...maximum temperatures that have been reached in each region in the preceding hydrostatic burning stages (Table |
