 | | Journal (article/letter/editorial) | | which also bear some similarities to those in Renazzo. Its weight ratios of total Fe,?%& and SiO,/MgO...which is not identical to either of these two meteorite types (LEECH and GROSSMAX 1977). In that work...olivines up to loom in size. Ni-Fe with rims of troilite is found in composite grains down to the submicron...clinopyroxene, mantled by a finer-grained rim of troilite, orthopyroxene and traces of metal and olivine...four grains of metallic nickel-iron and one of troilite are given in Table 3. Particularly noteworthy |  | | Journal (article/letter/editorial) | | assemblages from the MAC 87320, EET 92011, and Renazzo CR carbonaceous chondrites. The objectives of this...edges. Assemblages in MAC 87320 are composed of troilite, phosphate, and Ni-rich metal. EET 92011 contains...composed of pentlandite, troilite, and Ni-rich metal. The assemblages in Renazzo contain tochilinite, magnetite...magnetite, troilite, pentlandite, and phosphate. In all of the assemblages in Renazzo the tochilinite...tochilinite is ļ¬ne grained and intimately mixed with troilite, pentlandite, or magnetite. Opaque assemblages in |  | | Journal (article/letter/editorial) | | to 8. Per@mon PreaLtd. Printed The Ftumingb meteorite. M.ineralogyand chemistry PETER R. BVSECK,* BRIAN...hypersthene(21y0 FE),plagioclase (AZ&, kamwite,taenite,troilite, chromite, ihneniteand possibly olinohyperstheneor...dioxide miueral. Some kamacite grains, sheathed by troilite, have globular shapea sugge&ing that they may...introduced and reacted with the metal to form the troilite rims. FoUow&~thisthe meteoritewss shocked, producingthe...09, E&O-O*OO, Cr$$o* O-66; tit&Xl 99.27. THE meteorite fell at 12.60 p.m. on 25 June 1890, in Farmington |  | | Journal (article/letter/editorial) | | chemistry and mineralogy of the Bench Crater meteorite, which is a small fragment, previously numbered...unusual features it was different from any other meteorite then represented in terrestrial collections. McSween...examined Adelaide*, a meteorite with features similar to that of Bench Crater. The meteorite was first described...This feature led to our re-investigation of the meteorite. The analysis of Davy and Whitehead is given in...International Commission for Meteorite Nomenclature since the meteorite was not recovered in Adelaide |  | | Journal (article/letter/editorial) | | light. K, kamacite; T, taenite, P1, plessite; Tr, troilite; Cr, chromite. Surrounding silicate minerals appear...containing typical kamacite, zoned taenite and troilite. 4 JOHN A. VĀ¢OOD I 1 ? 4O I i I.....ordinary chondrites contain about 6% by weight of troilite (FeS, hex., Fig. 2). This contains remarkably...polycrystalline kamacite embedded in chondrules of the Renazzo chondrite. Globule at lower right contains spherical...inclusion. D: a polycrystaUine kamacite chondrule in Renazzo, crowded with Neumann lines. Ni profile R R ' appears |  | | Journal (article/letter/editorial) | | Pnnted in U.S.A. + 00 Origin of metallic Fe-Ni in Renazzo and related chondrites MIN SUNG LEE,* ALAN E. RUBIN...Co-Ni correlation among metal grains from the Renazzo and Al Rais chondrites reported in previous studies...chondrule margins, chondrule rims, and matrix) in Renazzo, Al Rais, and the related chondrite, MacAlpine...INTRODUCTION THE UNGROUPEDCARBONACEOUS chondrite, Renazzo, contains - 120 mg/g metallic Fe-Ni ( WILK, 1969;...highest among carbonaceous chondrite falls. The Renazzo-related meteorites, Al Rais and MacAlpine Hills |  | | Journal (article/letter/editorial) | | detail in only a few stony meteorites,be- each meteorite individually, even though each causewith earlier...one-tenth of the meteorites examined. Clovis Renazzo Cold Bokkeveld Richardton Cull[son Dhurmsala...pend on the sulfur and oxygen contents of the meteorite. A higher content of sulfur or oxygen With few...rule containkamaciteintergrownwith troilite. On the other hand, troilite usuallyoccurswith pure taenite or...near tile center. Rarely drusy cavities are obof troilite favorsa nickel-richparagenesis. All served; usually |  | | Journal (article/letter/editorial) | | metallic FeāNi and troilite, polycrystalline kamacite, ļ¬ne-grained metalātroilite assemblages, metallic...metallic Cu, and irregularly shaped troilite grains within metallic FeāNi. While at elevated temperatures...grained and in having subchondritic proportions of troilite and/or plagioclase. The two groups are widely...processes have been invoked previously for other meteorite groups. Rubin (2004) studied 210 equilibrated...polycrystalline troilite, metallic Cu, metalāsulļ¬de veins, and irregularly shaped troilite grains within |  | Bischoff, A., Palme, H., Ash, R.D., Clayton, R.N., Schultz, L., Herpers, U., Stƶffler, D., Grady, M.M., Pillinger, C.T., Spettel, B., Weber, H., Grund, T., EndreĪ², M., Weber, D. (1993) Paired Renazzo-type (CR) carbonaceous chondrites from the Sahara. Geochimica et Cosmochimica Acta, 57 (7) 1587-1603 doi:10.1016/0016-7037(93)90014-n | Journal (article/letter/editorial) | | Pergamon Press Ltd. Printed in U.S.A. Paired Renazzo-type (CR) carbonaceous chondrites from the Sahara...mineralogical similarities to the carbonaceous chondrite Renazzo were recovered at two locations of the Sahara:...26A1contents. The Acfer-El Djouf meteorite is classified as a CR (Renazzo-type) carbonaceous chondrite....comprises three non-Antarctic members (Al Rais, Renazzo, Acfer-El Djouf) and five Antarctic meteorites...lithological components of the Acfer-El Djouf meteorite are large chondrules (up to 1 cm in size; mean |  | Rubin, Alan E., Breen, John P., Isa, Junko, Tutorow, Sean (2017) NWA 10214-An LL3 chondrite breccia with an assortment of metamorphosed, shocked, and unique chondrite clasts. Meteoritics & Planetary Science, 52 (2) 372-390 doi:10.1111/maps.12797 | Journal (article/letter/editorial) | | zoned; their outer mantles contain small grains of troilite. These objects were later dubbed agglomeratic...taenite) with 4ā25 lm sized irregular patches of troilite. Other 100ā300 lm metallic Fe-Ni grains appear...appear sulfide free. Also present are troilite nodules, 40ā2550 lm in maximum dimension (Fig. 2), that contain...contain no metallic Fe-Ni. The troilite is essentially pure FeS (Table 1). We found one small weathered...chondrite 3 NWA 10214 Clast 1 Clast 6 chd 1 troilite nodule Clast 5 Clast 3 1 cm Clast 4 Fig. 1 |  | Harju, Ellen R., Rubin, Alan E., Ahn, Insu, Choi, Byeon-Gak, Ziegler, Karen, Wasson, John T. (2014) Progressive aqueous alteration of CR carbonaceous chondrites. Geochimica et Cosmochimica Acta, 139. 267-292 doi:10.1016/j.gca.2014.04.048 | Journal (article/letter/editorial) | | that have been more-significantly altered (e.g., Renazzo and Al Rais), metallic Fe-Ni has been partially...chondrites constitute one of the most primitive meteorite groups. There has been minimal thermal metamorphism:...phyllosilicate sheaths (Wasson and Rubin, 2009). Renazzo, the CRchondrite prototype and one of only two...Magnetite is present in some CR chondrites (e.g., Renazzo; Weisberg et al., 1993), but not in others (e.g...Wasson and Rubin, 2009). There are additional bulk meteorite properties that correlate to different degrees |  | SMITH, Caroline L., RUSSELL, Sara S., GOUNELLE, Matthieu, GREENWOOD, Richard C., FRANCHI, Ian A. (2004) NWA 1152 and Sahara 00182: New primitive carbonaceous chondrites with affinities to the CR and CV groups. Meteoritics & Planetary Science, 39 (12) 2009-2032 doi:10.1111/j.1945-5100.2004.tb00093.x | Journal (article/letter/editorial) | | 1, n = 16). Matrix comprises ~30 vol% of the meteorite and is predominantly sub-micron silicates, with...Meteoritical Bulletin (2001) as an ungrouped C3 meteorite. The thin section analyzed here is from the Institut...PhotoshopĀ® computer program. A thin section of Renazzo was analyzed using this method to compare with...Approximately 2 vol% of the meteorite is composed of Fe-Ni metal, magnetite, and troilite grains, which are often...and a Ni content of 4.4ā6.1 wt%. Sulfides are troilite containing up to 0.78 wt% Ni. Representative analyses |  | | Journal (article/letter/editorial) | | Vigarano is an observed fall (22 January 1910 in Ferrara, Italy) and an 11.5 kg stone was recovered quickly...the second stone. Weather records for 1910 in Ferrara, Italy are unavailable, but the website, weatherspark...single phase. These few include two grains of troilite, several grains that have compositions close to...Although some Fe is present in troilite, if we had analyzed coarse troilite grains, this would have been...58:5589ā5598. Kempe W. and MuĢller O. 1969 The stony meteorite Krahenberg: Its chemical composition and the Rb-Sr |  | | Journal (article/letter/editorial) | | kinds of carbonaceouschondrites: (1) carbonaceous Renazzo-like (CR) group, (2) carbonaceous high-metal (CH)...Bencubbin-like group let CH-like group let Ungrouped Renazzo Al Rais El DjoufOOI * Kaidunt Temple Bar EET 87770~...~Paired with 40 other EET meteorites (Antarctic Meteorite Newsletter, 1989, 1994). Ā§Paired with Acfer 207...uncertain. $Paired with QUE 94627 (Antarctic Meteorite Newsletter, 1996). classification than "group"...Bischoff, 1997; Marhas et al., 200 I), although Renazzo and Al Rais CAls contain secondary calcite and |  | | Journal (article/letter/editorial) | | (CI), Murchison, Cold Bokkeveld and Murray (CM), Renazzo (CR), Allende and Mokoia (C3V) carbonaceous chondrites...concentration and isotopic composition of each meteorite are therefore closely similar to those of this...carbonates matched previously published values. In Renazzo, the carbonates have a 813C close to + 42%o/PDB...Between 950 and 1060Ā°C, 813C reaches + 177.8%o in Renazzo, + 335.1%o in Cold Bokkeveld, and + 384.6%0 in...[15]. It is in such samples of the Murchison CM meteorite that the most extreme carbon isotopic compositions |  | | Journal (article/letter/editorial) | | by other researchers allow the definition of a Renazzo (CR) group of carbonaceous chondrites. We analyzed...twenty-seven elements. Along with previously analyzed Renazzo, six or more closely related fall events are represented...were studied ~tro~phically along with Renazzo and Al Rais. Renazzo has a lineation possibly caused by fluid-lub~cated... One of the earliest compositional studies of Renazzo was by MASON and WIIK ( 1962 ) . Other earlier...one by TAKAHASHI et al. ( 1978) who classified Renazzo as CVZ, and another by WOLF et al. ( 1980) who |  | | Journal (article/letter/editorial) | | Mason, 1963) showed that the bulk S content of CR Renazzo is about 30% lower than those in CO chondrites...chondrite Al Rais are about 2 higher than in Renazzo. Abundances of other moderately volatile elements...with bulk compositions for the observed CR fall Renazzo (Wiik, in Mason, 1963; Kallemeyn et al., 1994)...(unidentiļ¬ed small grains, mainly kamacite and troilite, but possibly also some rare chromite or magnetite)...report 6 mg/g H and 14 mg/g C in whole-rock CR Renazzo. Based on data summarized by Pizzarello et al. |  | Schrader, Devin L., Connolly, Harold C., Lauretta, Dante S., Zega, Thomas J., Davidson, Jemma, Domanik, Kenneth J. (2015) The formation and alteration of the Renazzo-like carbonaceous chondrites III: Toward understanding the genesis of ferromagnesian chondrules. Meteoritics & Planetary Science, 50 (1) 15-50 doi:10.1111/maps.12402 | Journal (article/letter/editorial) | | 1111/maps.12402 The formation and alteration of the Renazzo-like carbonaceous chondrites III: Toward understanding...conditions of ferromagnesian chondrules from the Renazzo-like carbonaceous (CR) chondrites, a systematic...processes of asteroids in the early INTRODUCTION Renazzo, the type specimen of the CR chondrite group, has...hypotheses for the formation and alteration of meteorite components. Representative sampling of distinct...LaPaz Ice Field (LAP) 02342,14; LAP 04720,8; Meteorite Hills (MET) 00426,33; Northwest Africa (NWA) 801 |  | | Journal (article/letter/editorial) | | 73 stony meteorites to identify the nature of meteorite ablation spheres (MAS) and constrain the processes...melted crusts are similar to those of the bulk meteorite. However, differences from whole rock suggest...that are formed by the melting dust particles. Meteorite ablation spheres produced at high altitude probably...probably have compositions very different from bulk meteorite and will resemble cosmic spherules derived from...microanalysis tools (Krinov, 1960; Rarndohr, 1967). Meteorite fusion crusts can provide valuable information |  | | Journal (article/letter/editorial) | | Widmanstatten pattern, nebular condensation, meteorite orbits, asteroid spectra); primitive meteoritic...(CAIs), solar-system abundances, organic matter); meteorite ages (radiogenic ages, cosmic-ray ages, charged...elements, noble gases, interstellar grains); and meteorite impacts (impact craters, WT mass extinction)....time was practically the worldās center of modem meteorite research. Harold Urey and Tony Turkevich were...would be a good thing if you were to continue meteorite research.ā Obviously, not to fill his shoes-nobody |  | | Journal (article/letter/editorial) | | Most of the zinc is present in the silicates. The troilite in olivine hypersthene chondrites (Holbrook and...and eucrites) contain only a few ppm of zinc. Troilite nodules in irons may contain as much as a few...from silicate to troilite. Evidence is offered for the belief that the high troilite content of enstatite...partial melting and gravitative transfer of molten troilite which exkacted zinc from chondritic material of...and the products. The seemingly largely missing troilite in the products introduces serious uncertainties |  | Hiyagon, H., Sugiura, N., Kita, N.T., Kimura, M., Morishita, Y., Takehana, Y. (2016) Origin of the eclogitic clasts with graphite-bearing and graphite-free lithologies in the Northwest Africa 801 (CR2) chondrite: Possible origin from a Moon-sized planetary body inferred from chemistry, oxygen isotopes and REE abundances. Geochimica et Cosmochimica Acta, 186. 32-48 doi:10.1016/j.gca.2016.04.030 | Journal (article/letter/editorial) | | INTRODUCTION Recent studies suggest that diļ¬erentiated meteorite parent bodies formed before chondrite parent bodies...with minor amount of chlorapatite, FeāNi metal, troilite, and pentlandite. Orthopyroxene (opx) is present...suggesting formation from the melt. IronāNi metal, troilite, pentlandite, and Fe oxides (probably weathering...(GFL) Clast #2 (GBL)(1) Clast #6 (GBL)(1) CR (Renazzo)(2) CR (average)(3) Acapulcoites (typical)(4) Acapulcoites...of GBL. Data sources: Mason and Wiik (1962) for Renazzo, Kallemeyn et al. (1994) for average CR, and Anders |  | Huss, Gary R., Meshik, Alex P., Smith, Julie B., Hohenberg, C.M. (2003) Presolar diamond, silicon carbide, and graphite in carbonaceous chondrites: implications for thermal processing in the solar nebula. Geochimica et Cosmochimica Acta, 67 (24) 4823-4848 doi:10.1016/j.gca.2003.07.019 | Journal (article/letter/editorial) | | University, Tempe, AZ 85287-1404, USA 2 Center for Meteorite Studies, Arizona State University, Tempe, AZ 85287-1404...meteorites studied were Murchison (CM2), Murray (CM2), Renazzo (CR2), ALHA77307 (CO3.0), Colony (CO3.0), Mokoia...correlations between the abundance patterns within a meteorite class and the petrologic type of the host meteorites...indicators of the metamorphic grade of the host meteorite (Huss and Lewis, 1994b). The metamorphism model...the bulk compositional characteristics of each meteorite class to follow up the suggestion by Huss and |  | | Journal (article/letter/editorial) | | was further strengthened by the large Allende meteorite fall in 1969 with its abundant calcium-aluminum-rich...are listed in Table 1. Elemental abundances for Renazzo (CR) are from Kallemeyn and Wasson (1982) and Mason...Mason and Wiik (1962), and for the other meteorite classes from Wasson and Kallemeyn (1988). primitive...(1988), except for the CR composition, which is the Renazzo bulk composition of Mason and Wiik (1962) and Kallemeyn...for matrix mineralogy and petrology in other meteorite groups that have a significant CI-like component |  | CHOE, Won Hie, HUBER, Heinz, RUBIN, Alan E., KALLEMEYN, Gregory W., WASSON, John T. (2010) Compositions and taxonomy of 15 unusual carbonaceous chondrites. Meteoritics & Planetary Science, 45 (4) 531-554 doi:10.1111/j.1945-5100.2010.01039.x | Journal (article/letter/editorial) | | Sources of whole-rock samples and thin sections. Meteorite Sample source Thin section number Acfer 094...rectangular blocks. Standards included the Allende meteorite (Kallemeyn et al. 1989), the USGS reference materials...Filomena fragment of the North Chile IIAB iron meteorite (Wasson et al. 2007). Our typical uncertainties...transmitted and reļ¬ected light (Table 1); sections of Meteorite Hills (MET) 01017 and Northwest Africa (NWA) 1152...set, but the sampling scatter in data for a new meteorite may hinder assignment based on this criterion |
|
