 | | Journal (article/letter/editorial) | | 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 |  | | Report (issue) | | μm (Vigarano), 1-8 μm (Allende), and 1-20 μm (Efremovka). Physical Properties: Cleavage: n.d. Fracture:...Luster: n.d. Z=8 X-ray Powder Pattern: Allende meteorite. 2.725 (100), 1.629 (80), 3.047 (55), 2.488 (50)...80 0.79 0.61 0.53 0.07 0.05 98.38 (1) Allende meteorite; average electron microprobe analysis, Ti3+ and...04Zr0.03) (Si2.38Al0.38Ti4+0.24)O12. (2) Efremovka meteorite; analysis not given; corresponds to (Ca2...01Fe0.01)(Si2.36Al0.48Ti4+0.16)O12. (3) Vigarano meteorite; analysis not given; corresponds to (Ca1.89Y0 |  | | Journal (article/letter/editorial) | | Carbonaceous chondrites, the most primi- tive of all meteorite types, have solar-like compositions, and contain...examples of which include the unique Efremovka meteorite in the Meteorite Collection of the Russian Academy...smaller crystals of spinel, hibonite, and sometimes perovskite. Fine-grained secondary anorthite replaces melilite...hibonite, grossite, dmitrivanovite (or krotite), perovskite and others, are present as accessory phases in... Ca–Al-RICH INCLUSIONS IN CARBONACEOUS CHONDRITES 389 Meteorite matrix Melilite Wark–Lovering rim Fine-grained |  | | Journal (article/letter/editorial) | | calcium-aluminum-rich inclusions from the reduced CV3 chondrite Efremovka ALEXANDER N. KROTI*, ALEXANDER A. ULYANOV1,2,...type B CAI (E48) from the reduced CV3 chondrite Efremovka, which is less altered than Allende. In contrast...contrast to the Allende accretionary rims, those in Efremovka consist of coarse-grained ( 2 0 4 0 ym), anhedral...accretionary rims. We infer that accretionary rims in Efremovka are more primitive than those in Allende and formed...andradite, wollastonite, and hedenbergite from the Efremovka rims may indicate that these rims sampled different |  | Ivanova, Marina A., Petaev, Michail I., Macpherson, Glenn J., Nazarov, Michail A., Taylor, Lawrence A., Wood, John A. (2002) The first known natural occurrence of calcium monoaluminate, in a calcium-aluminum-rich inclusion from the CH chondrite Northwest Africa 470. Meteoritics & Planetary Science, 37 (10) 1337-1344 doi:10.1111/j.1945-5100.2002.tb01032.x | Journal (article/letter/editorial) | | m subhedral grains intergrown with grossite, perovskite, and melilite. Nebular condensation is the most...proximity to the CAI in this very metal-rich meteorite. Therefore we do not attribute significance to...concentrically zoned with grossite + hibonite + perovskite spinel cores surrounded by melilite mantles and...groundmass of melilite or clinopyroxene, f minor perovskite. One of the grossite-rich CAIs, labeled El-005...consists mostly of grossite, with interstitial perovskite (D pm) and melilite (15 pm) grains. Surrounding |  | | Journal (article/letter/editorial) | | 0016-7037/94/$6.00 + .Ml Ion microprobe studies of Efremovka CAIs: I. Magnesium isotope composition J. N. GOSWAMI...Ca-Al-rich refractory inclusions (CAB) from the Efremovka CV3 chondrite are analysed for their magnesium...localized in nature. The pristine nature of the Efremovka CAB, as evident from the lack of secondary alteration...magnesium isotopes between these two phases. The Efremovka data are suggestive of a relatively homogeneous...less abundant. The refractory inclu~ons in the Efremovka CV3 chondrite are, however, an exception in this |  | | Journal (article/letter/editorial) | | 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 |  | Kawasaki, Noriyuki, Park, Changkun, Sakamoto, Naoya, Park, Sun Young, Kim, Hyun Na, Kuroda, Minami, Yurimoto, Hisayoshi (2019) Variations in initial 26Al/27Al ratios among fluffy Type A Ca–Al-rich inclusions from reduced CV chondrites. Earth and Planetary Science Letters, 511. 25-35 doi:10.1016/j.epsl.2019.01.026 | Journal (article/letter/editorial) | | fluffy Type A CAIs, from the reduced CV chondrites Efremovka and Vigarano were obtained by in situ Al–Mg isotope...was distributed homogeneously in the CAI forming region. Alternatively, the observed variations in (26...heterogeneous distributions of 26 Al in the forming region. © 2019 Elsevier B.V. All rights reserved. 1....gas. FGIs in the reduced CV chondrites, such as Efremovka and Leoville, preserve * Corresponding author...anorthite, and aluminous diopside, and more rarely perovskite and hibonite (Krot et al., 2004), however, in |  | | Journal (article/letter/editorial) | | oxide), Azul, Brazil, 60( 12): 2219 Monument Draw, meteorite, 60( 14): 2698 phengite, Dora-Maira nappe, western...Allende, AF clast, microtexture, 60( 14): 2561 Efremovka, K, isotope composition, 60( IO): 1828 Calcite...surface chemistry, dissolution, 60( 16): 3067 Efremovka, meteorite K, isotope composition, 60( 10): 1823 England...periclase, molecular dynamics model, 60( 10): 1645 perovskite, molecular dynamics model, 60( IO): 1645 Estuary...chondrites, carbonaceous, 60( 17): 3354 iron meteorite, 60( 15): 2891 K-T boundary layer, Gubbio, Italy |  | Nakashima, Daisuke, Ott, Ulrich, Hoppe, Peter, El Goresy, Ahmed (2008) Search for extinct 36Cl: Vigarano CAIs, the Pink Angel from Allende, and a Ningqiang chondrule. Geochimica et Cosmochimica Acta, 72 (24) 6141-6153 doi:10.1016/j.gca.2008.10.001 | Journal (article/letter/editorial) | | alteration occurred in the solar nebula or on the meteorite parent body (Brearley, 2003). Radioactive 36Cl...overabundances in bulk noble gas measurements of the Efremovka CV3 chondrite, and inferred a 36Cl/35Cl ratio...sections from the Vigarano meteorite and a thin section from the Ningqiang meteorite were prepared. Two thin...and 36S, the dynamic background in the 36 S mass region, and 37Cl were measured in a combined peak jumping...second step the dynamic background in the 36S mass region was re- 36 Cl 6143 corded by changing the deflection |  | | Journal (article/letter/editorial) | | 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...extracted presolar diamonds from the Allende meteorite by the method described in [I]. The optical properties...CRYSTALLIZATION OF PYROXENE AND SPINEL IN GABBROIC LUNAR METEORITE ASUKA 881757. T. Arai, H. Takeda, and P. H. Warren...University of Tokyo, Hongo, Tokyo 113, Japan. Lunar meteorite Asuka (A)88 1757 is a distinct new type of low-Ti |  | | Book | | 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 |  | | Journal (article/letter/editorial) | | l6-m.y.-old structure formed by the impact of a meteorite with the Earth. The long history of geological...ISOTOPE FRACTIONATION IN THE E2 CAI TYPE A FROM THE EFREMOVKA CV3 CHONDRITE. S. V. Afanassiev', S. G. Simakinz...type A CAI is one of the largest CAIs of the Efremovka Chondrite. The inclusion has been studied for...and consists of melilite (78.8), spinel (17.6), perovskite (3.2), and Fe-Ni metal (0.4 wt%) [3]. The melilite...melilite in the core encloses spinel an? perovskite grains. A thin section of the inclusion was coated |  | | Journal (article/letter/editorial) | | 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...other than the suggestion that the ice in this region is probably close to a steady state condition....movement of the ice with some ice dropping into the meteorite concentration zone of the Main Icefield. The majority |  | | Book | | 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 |  | | Journal (article/letter/editorial) | | 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 |  | | Book | | 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...of a deep-seated rock by glacier action, or a meteorite impact, or exposing a previously shielded rock...exposed on the surface due to the impact of a meteorite; (iv) cosmic ray shielded rocks exposed by glacier...exposed due to the impact of the Canyon Diablo iron meteorite (Nishiizumi et al 1991b), producing the Meteor |  | | Journal (article/letter/editorial) | | 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 | | | Book | | 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 |  | | Report (volume) | | .. 149 Exposure ages and dynamical models of meteorite delivery .......................................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...sector mass spectrometer (Clarke et al. 1969). Meteorite research has made particular demands upon noble...noble gases inherited from the upper mantle source region, which is dominated by olivine and pyroxenes. However |
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