 | | Journal (article/letter/editorial) | | Wl6-7037/87/%3.00 + .oO The Semarkona meteorite: First recorded occurrence of smectite in an ordinary...hydrothermally altered. Analyses of Abstract-Semarkona altered materials and opaque matrix are presented...calcite and Na, Fe smectite, respectively. In Semarkona the process possibly requires open system behavior...The low petrologic type previously assigned to Semarkona is the result of retrograde metamorphism, under... of a higher temperature mineral assemblage. Semarkona, and possibly Bishunpur, should be assigned to |  | Krot, Alexander N., Zolensky, Michael E., Wasson, John T., Scott, Edward R.D., Keil, Klaus, Ohsumi, Kazumasa (1997) Carbide-magnetite assemblages in type-3 ordinary chondrites. Geochimica et Cosmochimica Acta, 61 (1) 219-237 doi:10.1016/s0016-7037(96)00336-5 | Journal (article/letter/editorial) | | USA 3Earth Science and Solar System Exploration Division, NASA, Johnson Space Center, Houston, Texas 77058...magnetite consists of high-Ni ( 5 0 - 7 0 wt%) taenite and, in L and LL chondrites, Co-rich (up to 35...magnetite is low, the Ni contents of residual taenite tend to be high. Ni-rich sulfides were found only...identified haxonite in association with kamacite and taenite in LL3 ALHA79003, L3.6 Khohar, and LL3.4 Piancaldoli...troilite, and accessory taenite and pentlandite was originally described in LL3.0 Semarkona, LL3.7 ALHA77278 |  | | Journal (article/letter/editorial) | | fine-grained plessite by coarser Nirich metal (taenite and tetrataenite) and associated kamacite (Kimura...masses have cores of metallic Fe-Ni Jo (kamacite, taenite, tetrataenite) and/or carbide (cohenite, haxonite)...metal; tetrataenite is typically more abundant than taenite. Some chondrules in DOM ro 08006 are surrounded...carbides (Krot et al., 1997). Evidence from LL3.0 Semarkona that water moved through the matrix into chondrules...high-17O composition of magnetite grains in LL3.00 Semarkona, L3.05 EET 90161, LL3.6 Ngawi and other type-3 |  | | Journal (article/letter/editorial) | | the transmission electron microscope (TEM) to meteorite studies, mineralogical investigations of carbonaceous...Ni-rich taenite and minor chromite occur in Lance matrix, while kamacite is absent. Nirich taenite is in...The composition of taenite in matrix is richer in Ni than the average value of taenite for Lance reported...The lack of kamacite and the presence of Nirich taenite and minor chromite in matrix suggests that Lance...chondrites. Ornans also contains only Ni-rich taenite (MCSWEEN, 1977). As noted above, Fe3+ oxide in |  | Nabelek, Ladislav, Mazanec, Martin, Kdyr, Simon, Kletetschka, Gunther (2015) Magnetic, in situ, mineral characterization of Chelyabinsk meteorite thin section. Meteoritics & Planetary Science, 50 (6) 1112-1121 doi:10.1111/maps.12448 | Journal (article/letter/editorial) | | situ, mineral characterization of Chelyabinsk meteorite thin section Ladislav NABELEK1,2, Martin MAZANEC1...from about 0.3 mm distance between the probe and meteorite surface (resolution about 0.15 mm). Anomalies...in both magnetizing and demagnetizing of the meteorite thin section, while keeping the magnetization...pulses. Bcr of magnetic sources in Chelyabinsk meteorite ranges between 4 and 7 mT. These magnetic sources...made out of the F1 fragment of the Chelyabinsk meteorite that landed in Russia, 15 February 2013 (Borovicka |  | | Journal (article/letter/editorial) | | compositionally heterogeneous glass from LL3.0 Semarkona Alan E. RUBIN Institute of Geophysics and Planetary...December 2012) Abstract–Chondrule K7p from LL3.0 Semarkona consists of four nested barred-olivine (BO) chondrules...Mosaic backscattered electron (BSE) image of Semarkona thin section AMNH 4128-2. A grid is superimposed...multilayered barred-olivine (BO) chondrule from the Semarkona LL3.0 ordinary chondrite that sheds light on multiple...to make backscattered electron (BSE) images of Semarkona thin section AMNH 4128-2, on loan from the American |  | | Journal (article/letter/editorial) | | chondrites as well as investigating conditions on meteorite parent bodies. Several aspects of ordinary chondrite...ordinary chondrites in an attempt to correlate meteorite mineralogy with asteroid composition from reflectance...the growing interest in aqueous alteration on meteorite parent bodies and observations of phyllosilicates...important when analyzing small and precious pieces of meteorite. Mˆssbauer spectroscopy is capable of detecting...a 57Co source allows the presence of 57Fe in meteorite samples to be analyzed. The energy of the source |  | Gattacceca, J., Suavet, C., Rochette, P., Weiss, B. P., Winklhofer, M., Uehara, M., Friedrich, Jon M. (2014) Metal phases in ordinary chondrites: Magnetic hysteresis properties and implications for thermal history. Meteoritics & Planetary Science, 49 (4) 652-676 doi:10.1111/maps.12268 | Journal (article/letter/editorial) | | individual meteorites while homogeneous among meteorite subsamples. Except for the most primitive chondrites...multidomain grains in plessite and in the rim of zoned taenite) dominates the remanent magnetism, in agreement...2003, 2008, 2009), allowing scanning of large meteorite collections for preliminary classification (Folco...significant data set of hysteresis properties for meteorite falls is the report by Terho et al. (1992) that...paleomagnetism. SAMPLES AND METHODS Samples due Only meteorite falls were studied to avoid biases to terrestrial |  | | Journal (article/letter/editorial) | | graphite may have been lowered by its dis~lution in taenite; and, in any ease, oxygen fugacities appear to...from comparisons of bulk metal (kamacite plus taenite) compositions for H and L chondrites analyzed by...metamorphic grade, though analogous information on taenite compositions is not available. Based on purely...because of the high precision and large number of meteorite analyses. However, the occurrence of three systematic...seen in the compilation of JAROSEW~CH ( 1990) of meteorite analyses (Table 1). The metal abundances of JAROSEWICH |  | | Journal (article/letter/editorial) | | kamacite. Fe-Ni metal grains in chondrules in Semarkona typically show plessitic intergrowths consisting... Among the known ordinary and CO chondrites, Semarkona is the most primitive. The range of metamorphic...Acfer 094, a true type 3.00 chondrite, than in Semarkona, which should be reclassified as type 3.01. INTRODUCTION...chondrites, except for bulk metal compositions in Semarkona chondrules (Kimura and Weisberg 2004), and the...the bulk chemical composition of Semarkona chondrules (Grossman and Wasson, 1985). Because CH and CR chondrites |  | | Journal (article/letter/editorial) | | of iron-nickel carbides in the matrix of the Semarkona unequilibrated ordinary chondrite LINDSAY P. KELLER...Barringer) Abstract-The fine-grained matrix of the Semarkona unequilibrated ordinary chondrite contains an...postaccretional thermal processing that occurred on the Semarkona parent body. INTRODUCTION The unequilibrated ordinary...of certain matrix materials in the Semarkona chondrite. Semarkona is a UOC fall of low petrographic type...(Hutchison et al., 1987; Alexander et al., 1989). Semarkona is also unusual because of the occurrence of FeNi |  | | Journal (article/letter/editorial) | | phyllosilicates MARTIN R. LEE1,* and PHILIP A. BLAND2 1 2 Division of Earth Sciences, University of Glasgow, Lilybank...parts of some meteorites, will only occur if the meteorite is especially metal-rich, or has a low primary...but occur in abundance in only one ‘hot’ desert meteorite, Daraj 014. The majority of Fe-rich weathering...Si-Fe-Ni-Mg mineral or gel has also partially replaced taenite in ALHA 78045. In addition to Fe-rich weathering...concentrations. Here we report results of a study of meteorite terrestrial weathering products using high-resolution |  | Bischoff, Addi, Dyl, Kathryn A., Horstmann, Marian, Ziegler, Karen, Wimmer, Karl, Young, Edward D. (2013) Reclassification of Villalbeto de la Peña-Occurrence of a winonaite-related fragment in a hydrothermally metamorphosed polymict L-chondritic breccia. Meteoritics & Planetary Science, 48 (4) 628-640 doi:10.1111/maps.12076 | Journal (article/letter/editorial) | | January 2013) Abstract–The Villalbeto de la Pe~ na meteorite that fell in 2004 in Spain was originally classified...fragments within the Villalbeto de la Pe~ na meteorite clearly bears consequences for the previous classification...Blanca and the anomalous silicate-bearing iron meteorite LEW 86211 than to the ordinary chondrite groups...inclusion is increasing from the fragment/host meteorite boundary (approximately An10) toward the interior...audible booms (Llorca et al. 2005). The first meteorite specimen was found on January 11, 2004, near the |  | | Journal (article/letter/editorial) | | multi-domain tetrataenite and spinodally decomposed taenite. Ellipsoidal to nearly spherical voids occur throughout...high degree of lattice match with neighboring taenite, a low cooling rate at peak metamorphic temperatures...the Ni-poor composition of (Fe,Ni)5C2 in the Semarkona LL3 chondrite (Keller, 1998). Gibbs energy functions...proportions. Table 1 Solubility of carbon in taenite and solubility of nickel in haxonite (all atomic)...pseudo-binary joints taenite-graphite and taenite-haxonite. T (°C) Taenite + graphite Taenite + disordered |  | | Journal (article/letter/editorial) | | chondrites WSG 95300 (H3.3, meteorite find) and Parnallee (LL3.6, meteorite fall). Fine grained magnetic...chondrule formation processes) or processes on the meteorite parent bodies (Scott et al., 1981; Nagahara, 1984;...processing in the nebula or, less likely, on the meteorite parent bodies. Similar REE patterns of sulfides...metamorphic and aqueous alteration processes on the meteorite parent body (Becker et al., 2001; Walker et al...behaviour (e.g., terrestrial weathering in case of meteorite finds), however, the causes of these shifts were |  | Jones, Rhian H., McCubbin, Francis M., Dreeland, Linda, Guan, Yunbin, Burger, Paul V., Shearer, Charles K. (2014) Phosphate minerals in LL chondrites: A record of the action of fluids during metamorphism on ordinary chondrite parent bodies. Geochimica et Cosmochimica Acta, 132. 120-140 doi:10.1016/j.gca.2014.01.027 | Journal (article/letter/editorial) | | Mexico, MSC03 2050, Albuquerque, NM 87131, USA c Division of Geological and Planetary Sciences, California...and Ap020 from an unknown pegmatite locality in India. The chemical compositions, including the water...Durango apatite, and a merrillite from martian meteorite QUE94201. 3. RESULTS 3.1. Petrographic observations...(b) Merrillite in association with troilite and taenite. (c) Isolated grains of merrillite in matrix. (d)...ap = chlorapatite, k/t = kamacite/taenite (Fe,Ni metal), tae = taenite, tro = troilite, olv = olivine, |  | Shah, Jay, Bates, Helena C., Muxworthy, Adrian R., Hezel, Dominik C., Russell, Sara S., Genge, Matthew J. (2017) Long-lived magnetism on chondrite parent bodies. Earth and Planetary Science Letters, 475. 106-118 doi:10.1016/j.epsl.2017.07.035 | Journal (article/letter/editorial) | | or after agglomeration, i.e., for a chondritic meteorite whether the chondrules carry a pre- or post-accretionary...is due to tetrataenite, which transformed from taenite as the parent body cooled to below 320 ◦ C, when...magnetization during atmospheric entry of the meteorite, both samples were taken from their interiors...since its formation. Tetrataenite transformed from taenite 107 during cooling to below 320 ◦ C on the parent...cloudy zone of 25–250 nm tetrataenite in zoned taenite, with a rim of 1–14 μm tetrataenite grains (Uehara |  | | Journal (article/letter/editorial) | | 6 unequilibrated ordinary chondrites (UOCs) (Semarkona [LL 3.0], Bishunpur [L/LL 3.1], Krymka [LL 3.1]...that previous studies pointed to the OM in this meteorite as being the most pristine among all chondrites...metamorphic grade: 1) follows the hierarchy Renazzo << Semarkona << other UOCs; 2) is well correlated to the petrographic...discrimination between Renazzo, Semarkona, and other UOCs shows: 1) Semarkona is a very peculiar UOC—by far...that fine-grained chondrule rims and matrix in Semarkona could be the source of smectite-rich IDPs is not |  | | Journal (article/letter/editorial) | | ordering process of transformation from disordered taenite to ordered tetrataenite [23]. Therefore, the NRM... e.g. Murchison (CM2), Bishunpur (LL3.1) and Semarkona (LL3.0) [6,7,10,20,24,25], and have also been...estimates are based on Alexander et al. [51] for Semarkona, Rambaldi and Wasson [20] for Bishunpur, Huss...100 Ma [50] Meteorite name Type Metamorphic Geothermometer temperature (°C) Semarkona LL3.0 250 ð2Þ...olivine. The least metamorphosed type LL3.0 Semarkona meteorite indicates the maximum metamorphic temperature |  | | Journal (article/letter/editorial) | | to occur. Variations in isotopic ratios of N in taenite observed among equilibrated ordinary chondrites...numerical simulations of the transportation of C in meteorite parent bodies. They concluded that the parent...equilibrated H chondrites is mainly trapped in taenite (f.c.c. y-Fe,Ni), dissolved in the interstitial...N concentrations in taenite were -10 ppm. The isotopic ratios of the N in taenite were observed to range...equilibrated chondrites. We considered that N trapped in taenite reflects the N equilibrium system when the temperature |  | Hicks, L. J., MacArthur, J. L., Bridges, J. C., Price, M. C., Wickham-Eade, J. E., Burchell, M. J., Hansford, G. M., Butterworth, A. L., Gurman, S. J., Baker, S. H. (2017) Magnetite in Comet Wild 2: Evidence for parent body aqueous alteration. Meteoritics & Planetary Science, 52 (10) 2075-2096 doi:10.1111/maps.12909 | Journal (article/letter/editorial) | | this hypothesis, powdered material from a CR2 meteorite (NWA 10256) was shot into the aerogel at 6.1 km...silicates, requiring aqueous activity in the meteorite parent body. Hematite and maghemite c-Fe2O3 are...look at powdered material from a CR2 chondrite meteorite, selected as an analogue to Wild 2, including...magnetite grain from a thin section of the same CR2 meteorite shows a Fe-rich content with a trace of Cr. Peaks...2 7113.1 7113.1 Magnetite Magnetite Fe-metal Taenite Olivine Olivine Olivine Pyroxene Pyroxene Hematite |  | | Book | | METEORITE MINERALOGY Meteorites are fascinating cosmic visitors. Using accessible language, this book...book documents the history of mineralogy and meteorite research, summarizes the mineralogical characteristics...photographs of meteorite minerals, and with an accompanying online list of meteorite minerals, this book...book provides a useful resource for meteorite researchers, terrestrial mineralogists, cosmochemists,...students in these fields. a l a n e . r u b i n is a meteorite researcher who recently retired from the University |  | | Journal (article/letter/editorial) | | Society, 1997. Printed in USA. Mineralogy of meteorite groups ALANE. RUBIN Institute of Geophysics and...sulfides, and carbonates. In addition to kamacite and taenite, iron meteorites contain carbides, elemental C...structure and formed by a shear transformation from taenite during shock reheating and rapid cooling. The C...shocked ordinary chondrites. Secondary minerals in meteorite finds that formed during terrestrial weathering...including "pure iron" (kamacite), nickel-iron (taenite), graphite, schreibersite, troilite, daubreelite |  | | Journal (article/letter/editorial) | | et al., 2013). OCs also postdate magmatic iron meteorite formation. Several studies argue for their formation...melt breccia, and Portales Valley, a low shock meteorite with large metal veins as an example of metal...preparation Approximately 500 mg of initial bulk meteorite material was cleaned with 0.2 M HNO3 under cold...avoid metal oxidation. Afterward, 300 mg of the meteorite sample was gently powdered in an agate mortar...17‰ (n = 10) and the in-house IAB Magura iron meteorite (Luais, 2007) had a δ74/70Ge value of 0.78 ±0 |  | | Journal (article/letter/editorial) | | California, Los Angeles, CA 90095-1567, USA c Division of Geological and Planetary Sciences, California...primitive chondrites (e.g., L3.0 NWA 7731; LL3.0 Semarkona) are interpreted to be products of the processes...the IMACNMNC, including 17 from the Allende CV3 meteorite (Ma, 2015a) and high-pressure phases such as bridgmanite...ruthenosmiridim selenium steinhardtite stolperite sulfur taenite tetrataenite wairauite zhanghengite carbides beta-moissanite...␥-(Fe,Ni) (Ce,La,Ca)4 (Fe ,Mg) 2 (Ti,Fe )3 Si4 O22 taenite Mg3 (Si4 O10 )(OH)2 (Ni,Fe)5 (Si,P)2 talc tazheranite |
|
