 | | Journal (article/letter/editorial) | | Tswtkov, V.I. The Scattering of the Tsarev Stony Meteorite Shower Meteoritika, 1984, Issue 43, pp. 3-8 Information...Information about the specimens of the Tsarev meteorite, in particular those found by the 1982 expedition...have been found who observed the fall of the meteorite Tsarev in 1922. Five illustrations, sixteen references...The Conditions of the Fall of the Chinga Iron Meteorite Meteoritika, 1984, Issue 43, pp. 9-15 Based on...concluded that the Chinga meteorite felI in the form of an iron meteorite shower. Five illustrations |  | | 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...mineral phases (melilite, spinel, fassaite, and anorthite) in these inclusions are used to determine intrinsic...localized in nature. The pristine nature of the Efremovka CAB, as evident from the lack of secondary alteration...close to the canonical value of 5 X 1O-' . The anorthite data for another inclusion suggest minor disturbance |  | | 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 |  | | Journal (article/letter/editorial) | | Carbonaceous chondrites, the most primi- tive of all meteorite types, have solar-like compositions, and contain...aggregates (AOAs) composed of olivine, Al-diopside, anorthite, and spinel, and 3) chondrules that are ferromagnesian...examples of which include the unique Efremovka meteorite in the Meteorite Collection of the Russian Academy...melilite inclusions, melilite is replaced by anorthite and Ca-pyroxene, which are the primary phases...sometimes perovskite. Fine-grained secondary anorthite replaces melilite at grain boundaries. All inclusions |  | | 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) | | 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...and fine-grained CAIs composed of Al-diopside, anorthite, and spinel, forsterite. Although the fine-grained...accretionary rims. We infer that accretionary rims in Efremovka are more primitive than those in Allende and formed |  | 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 |  | 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) | | hornblende (Ti, Si, Mg, Fe, Na, K), bytownite and anorthite (Al), synthetic wollastonite (Ca), chromite (Cr)...proximity to the CAI in this very metal-rich meteorite. Therefore we do not attribute significance to...spinel cores surrounded by melilite mantles and anorthite and Al-diopside rims. Other CAIs have porphyritic...The CaA1204-rich zone is in turn enclosed in a region consisting mostly of grossite with abundant included...CaA1204-bearing CAI was found in NWA 470, a new meteorite find recovered in Morocco in 1999 and recently |  | | 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...assemblages consist mainly of spinel, melilite, anorthite, and aluminous diopside, and more rarely perovskite |  | | Journal (article/letter/editorial) | | 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...reveal noticable isotopic variations in anorthite grains with boron content of 0.2 to 1.3ppm and low Be/B...in 1OB in melilites in CAIs from Allende and Efremovka characterized by low B content (less than a few |  | 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) | | scenarios. We demonstrate that irradiation during meteorite transit from the asteroid belt to Earth has a...having a 36 Cl/35Cl ratio of 5 9 10 6. Secondary anorthite, which likely formed in the same alteration event...excesses (26Al/27Al < 2 9 10 7) in co-formed anorthite. Hsu et al. (2006) and Nakashima et al. (2008)...Nakashima et al. (2010) for a halite from the Zag meteorite. There are many unanswered questions concerning...alkali-halogen metasomatic process involving anorthite. For more information on sodalite formation, see |  | Tang, Haolan, Liu, Ming-Chang, McKeegan, Kevin D., Tissot, Francois L.H., Dauphas, Nicolas (2017) In situ isotopic studies of the U-depleted Allende CAI Curious Marie : Pre-accretionary alteration and the co-existence of 26 Al and 36 Cl in the early solar nebula. Geochimica et Cosmochimica Acta, 207. 1-18 doi:10.1016/j.gca.2017.03.001 | Journal (article/letter/editorial) | | Backscattered electron images of the Curious Marie CAI. The region outlined in panel (A) is shown in greater detail...sources for thermal processing in an early accreted meteorite parent body. Numerical simulations (Herndon and...6, it is clear that the size of this subsurface region, relative to that of the entire body, is significantly...mineralogy and chemical composition of the host meteorite. The presence of ferrous olivine in the dark inclusions...approximate them using the Mg diffusivity data in anorthite (LaTourrette and Wasserburg, 1998) because this |  | | 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...Zinc is exclusively located within the FeNisulfide region. This observation complicates the discussed models...consist of intergrowths of an iron oxide, fayalite, anorthite, and sulfide. Commonly, the marginal parts of |  | | 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) | | 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 |  | | 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 |  | | 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 |  | | 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 | | 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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