 | Prasad, M. Shyam, Rudraswami, N. G., De Araujo, Agnelo, Babu, E. V. S. S. K., Vijaya Kumar, T. (2015) Ordinary chondritic micrometeorites from the Indian Ocean. Meteoritics & Planetary Science, 50 (6) 1013-1031 doi:10.1111/maps.12451 | Journal (article/letter/editorial) | | Institute of Oceanography, Dona Paula, Goa 403004, India LAM-ICP-MS National Facility, CSIR-National Geophysical...Research Institute, Uppal Road, Hyderabad 500007, India * Corresponding author. E-mail: shyam@nio.org ...micrometeorites overlap and extend the range of the known meteorite types, therefore constitute an extremely valuable...et al. 1997) with smaller percentages of other meteorite types in the total flux (Taylor et al. 2007)....carbonaceous chondrites comprise a miniscule ~3% of the meteorite flux (Krot et al. 2003). More recently, micrometeorites |  | | Journal (article/letter/editorial) | | conversion of CAI minerals (i.e., FeOenrichment of spinel, conversion of perovskite to ilmenite, and depletion...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...temperatures ranging from 200 - 260ºC for type-3.00 Semarkona (Alexander et al., 1989; Huss and Lewis, 1994)...those of the most unequilibrated OC (e.g., LL3.00 Semarkona, LL3.15 Bishunpur, LL3.2 Krymka; Takagi, 2005; |  | | 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 |  | 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) | | armalcolite (165) 37 Asia (165) 129 1897 Assam India (167) 269 assimilation (170) 301 Atlantic Ocean...inclusions (164) 345, (165) 25, (169) 173 India (171) 7, (171) 607 India-Asia collision (171) 107 Indian Ocean...(169) 37 seismicity (168) 255, (172) 11 Semarkona Meteorite (164) 577 Senegal (173) 413 Sesia-Lanzo Zone...speleothems (166) 85 spinel (164) 277, (164) 345, (165) 55 spinel group (169) 165 spinel lherzolite (172)...Mountain (171) 95 Yunnan China (165) 1 Zagami Meteorite (173) 397 zircon (164) 409, (169) 291, (171) 591 |  | | 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 |  | McCanta, M.C., Treiman, A.H., Dyar, M.D., Alexander, C.M.O’D., Rumble, D., Essene, E.J. (2008) The LaPaz Icefield 04840 meteorite: Mineralogy, metamorphism, and origin of an amphibole- and biotite-bearing R chondrite. Geochimica et Cosmochimica Acta, 72 (23) 5757-5780 doi:10.1016/j.gca.2008.07.034 | Journal (article/letter/editorial) | | elsevier.com/locate/gca The LaPaz Icefield 04840 meteorite: Mineralogy, metamorphism, and origin of an amphibole-...online 11 September 2008 Abstract The R chondrite meteorite LaPaz Icefield (LAP) 04840 is unique among metamorphosed...ordinary chondrite phyllosilicates (as in the Semarkona chondrite), and insoluble organic matter (IOM)...mccanta@ gmail.com (M.C. McCanta). 1 Present address: Division of Geological and Planetary Sciences, California...significant, and here we report such a find: the meteorite LAP 04840, a Rumuruti (R) group chondrite, with |  | | Journal (article/letter/editorial) | | with a double-polished section of the Allende meteorite (PTS, Naturhistorisches Museum, Vienna) at the...euhedral spinel crystal, the coexisting glass and the clinopyroxene. (b) Note that the spinel crystal...of glass inclusions in olivines of the Allende meteorite varies as follow: SiO2: 42.9–55.9 wt%; TiO2: 0...heated glass inclusions in olivines of the Allende meteorite, for a final temperature of 1100–1450 °C varies...glass inclusion (composed of glass plus a euhedral spinel crystal) did develop some fibrous crystals (clinopyroxene) |  | | Journal (article/letter/editorial) | | consisted of diopside, anorthite, melilite, and spinel. Individual AOIs in carbonaceous chondrites may...minimally altered carbonaceous chondrites, accessory spinel lowCa pyroxene melilite (Krot et al. 2004a)...chondrites (e.g., Acfer 094 and Adelaide), and in the Semarkona LL3.0 ordinary chondrite (e.g., Grossman and Steele...submicrometer-sized grains within the plagioclase are probably spinel-hercynite, but they are too small to analyze quantitatively...61.8 Or 1.1 CV3 Allende AOI 473-3 Olivine Spinel Diopside Diopside 1.9 1.1 0.24 1.5 0.8 0.06 6 |  | | Journal (article/letter/editorial) | | Fractionated sulfur isotopes in sulfides of the Kaidun meteorite HARRYY. MCSWEEN, JR.'*, LEER. RICIPUT12 AND BRUCEA...37996, USA 2Chemistry and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee...form 1996 September 12) Abstract-The Kaidun meteorite contains carbonaceous chondrite (CM 1) clasts...jackstraw pyrrhotites are unknown from any other meteorite, although uncoated acicular pyrrhotites were noted...using SIMS are highly variable within any one meteorite section and mostly shifted to negative values |  | | Journal (article/letter/editorial) | | vol.% olivine, 5.5 vol.% diopsite, and 0.6 vol.% spinel. Representative mineral compositions and calculated...diopsite with small amounts of Al, and Cr-rich spinel. This fayalitic composition of the olivine (Fa10)...CaO NiO Na2O Total Fa (mol%) Olivine Diopsite Spinel Bulk a 41.5 ± 0.5 n.d. 0.5 ± 0.1 9.8 ± 0.6 0... e.g. Murchison (CM2), Bishunpur (LL3.1) and Semarkona (LL3.0) [6,7,10,20,24,25], and have also been...(Fa10), glassy mesostasis, and coarse (15–50 μm) spinel grains surrounded by small (5–10 μm) Fe-bearing |  | 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...8.056, and all final results for cometary and meteorite samples and reference materials, including Fe-K |  | | Journal (article/letter/editorial) | | near the surface of some chondrules in LL3.0 Semarkona, and silica-rich igneous rims around many type-I...grains derived from disrupted type-IA chondrules. Semarkona chondrule mesostases that show increased concentrations...(FeO-rich porphyritic olivine—PO) chondrules in Semarkona LL3.0 and found that most phenocrysts exhibit...Meteoritical Society, 2018. 2 A. E. Rubin Semarkona, and silica-rich igneous rims around many type-I...ANALYTICAL PROCEDURES Two thin sections of LL3.0 Semarkona (USNM 1805-3 and AMNH 4128-2) were examined microscopically |  | | Journal (article/letter/editorial) | | Solar System: The First 180 Million Years Allende Meteorite. Photo courtesy of J ames St. J ohn Charles K...(CaAl4O7) at 1,660 K, gehlenite (Ca 2 Al 2 SiO7 ), spinel (MgAl 2O 4 ), and clinopyroxene [Ca(Mg,Ti,Al)(Si...contents of the phases (assuming the boron content of spinel to be negligible) in Allende Type B1 inclusion...individual chondrules has not been reported in bulk meteorite analyses (Zhai et al. 1996). Further, this heterogeneity...of a glass-rich chondrule from the Murchison meteorite, with a texture that strongly indicates that it |  | | Journal (article/letter/editorial) | | was further strengthened by the large Allende meteorite fall in 1969 with its abundant calcium-aluminum-rich...and Mason and Wiik (1962), and for the other meteorite classes from Wasson and Kallemeyn (1988). primitive...2003; Bonal et al. 2004). In the OCs, compared to Semarkona (LL3.0), Bishunpur (L/ LL3.1) and Krymka (LL3...IOM, respectively (Alexander et al. 1998). Even Semarkona has experienced some metamorphism (Grossman and...1993), with a similar degree of metamorphism to Semarkona (Grossman and Brearley 2005), but its bulk alkali |  | Zhang, Ai-Cheng, Itoh, Shoichi, Sakamoto, Naoya, Wang, Ru-Cheng, Yurimoto, Hisayoshi (2014) Origins of Al-rich chondrules: Clues from a compound Al-rich chondrule in the Dar al Gani 978 carbonaceous chondrite. Geochimica et Cosmochimica Acta, 130. 78-92 doi:10.1016/j.gca.2013.12.026 | Journal (article/letter/editorial) | | regions are distinguished by the presence of Fe-rich spinel and sapphirine in the core and their absence in...of Fe-rich olivine, enstatite, and Fe–Ni metal. Spinel and some olivine grains in the SARC are 16O-rich...Group II CAIs and ferromagnesian chondrules. Both spinel and olivine with 16O-rich features could be of...metamorphism. During the same thermal metamorphism event, spinel, olivine, some enstatite, and the mesostasis experienced...aczhang@nju.edu.cn (A.-C. Zhang). 1 Present address: Division of Earth and Planetary Sciences, Kyoto University |  | Joswiak, D.J., Nakashima, D., Brownlee, D.E., Matrajt, G., Ushikubo, T., Kita, N.T., Messenger, S., Ito, M. (2014) Terminal particle from Stardust track 130: Probable Al-rich chondrule fragment from comet Wild 2. Geochimica et Cosmochimica Acta, 144. 277-298 doi:10.1016/j.gca.2014.08.017 | Journal (article/letter/editorial) | | USA Laboratory for Early Solar System Evolution, Division of Earth and Planetary Materials Science, Graduate...Ti-rich clinopyroxene, anorthitic plagioclase ± spinel ± low-Ca pyroxene ± glass, and have textures similar...chondrules from the primitive C3.05 chondritic meteorite Yamato 81020 (Kurahashi et al., 2008). 284 ...chondrule anorthite data from Acfer 094 (ungrouped), Semarkona (LL3.00), Krymka (LL3.1), Acfer 182 (CH3) and...subspherical microchondrules in matrix in the UOCs Semarkona (LL3.00) and MET 00526 (3.05) with average diameters |  | | Journal (article/letter/editorial) | | Are phyllosilicates the same throughout the meteorite? How does the alteration assemblage in Kaba compare...near Kaba, Hungary, in 1857, and the bulk of the meteorite is kept in the museum at the College of the Reformed...thin sections; it is fine grained and contains spinel, perovskite, and fine-grained CaAl silicates, including...larger role in the alteration of the Lance CO3 meteorite than in Kaba (KELLERand BUSECK, 1990). The combination...mineralogy could form. From a study of the Orgueil meteorite, TOMEOKAand BUSECK(1988) also suggested that CI |  | | Journal (article/letter/editorial) | | determined by EPMA analysis. Compositional fields of Semarkona, Tagish Lake carbonate-poor, and Bells are also...versus c) SiO2 versus Na2O. diagrams of SK series Semarkona LL3 chondrite, lithology, and Bells CM obtained...micrometeorites do not show K-enrichment. In addition, the Semarkona LL3 chondrite, which consists largely of hydrous...Table 1). 2. Saponite-Rich Type The matrices of Semarkona ordinary chondrite, Bells CM chondrite, and Tagish...chondrites, Semarkona, Bells, and the Tagish Lake carbonate-poor lithology. The matrix of Semarkona contains |  | | Book (edition) | | Italy NT Chieti NT Marsica AJjsaroka Fault Abee Meteorite aa Taylor County Texas Texas Southwestern U...River IN Index Indian states as applica¬ ble. BT India SA Bihar SA West Bengal Ajman Sheikdom. One of federation...Peninsula Ajmer City and district in central Raja¬ sthan, NW India. BT Rajasthan BT India akaganeite BA oxides...Endicott Mountains NA Fairbanks Alaska NA Fairbanks District NT Fairweather Fault NT Glacier Bay NA Glacier...Interior Seaway NX Western Overthrust Belt SA Abee Meteorite SA Altyn Limestone SA Banff Formation SA Bearpaw |  | | Journal (article/letter/editorial) | | 6. TABLE 3 The yields (relative to the bulk meteorite) and the peak isotopic compositions of the heavy...temperatures for carbon and nitrogen are also listed Meteorite (ppm) 2. T e c h n i q u e s Most of the presolar...are greater than petrologic type 3.6 Meteorite and type Semarkona (LL3.0) Bishunpur (L/LL3.1) Krymka (LL3...have been calculated relative to the bulk meteorite. Semarkona Bishunpur Krymka Inman Tieschitz 1.6 1...r a t i o n residues 1 - 2 g samples of each meteorite were given alternate t r e a t m e n t s i n 9 |  | | Journal (article/letter/editorial) | | in the case of four chondrules removed from Semarkona (type 3.0) and Krymka (type 3.1) , by instrumental...the major chondrule groups Al, A2, and Bl in Semarkona, group A5 is a primary group whose presence provides...with a scheme that is independent of the host meteorite. The compositional classification scheme for chondrules...are present in the essentially unmetamorphosed Semarkona chondrite (Al, A2, A5, and Bl, which can be considered...consistent with the bulk composition of the host meteorite. Group A5 are unique in appearing in both equilibrated |  | | 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) | | originally by EPSTEINand MAYEDA (1953) to obtain PO Meteorite carbonate isotopic composition of water samples)...and 566 ppm for the two extractions. Neither meteorite was studied with the two-step extraction technique...+17.0 nd ALHA 77215 LX? 29.840 113 nd ad Semarkona LL3.0 24.340 23.050 1730 1256 -5.7 -7.4 c9... nd Hamler LL4 27.800 297 -4.8 +17.0 Meteorite carbonate isotopic composition 2859 usually...study (EKG). Oxygen The 6’*0 values for the meteorite carbonates analyzed in this study are given in |  | | Journal (article/letter/editorial) | | the major silicate phases of chondrules from Semarkona (LL3.0), Bishunpur (L3. l), and Chainpur (L/LL3...probe analysis from polished thin sections of Semarkona (LL3.0), Bishunpur (L3. I), and Chainpur (L/LL3...the chondrules and much of the Fe in the bulk meteorite is in metal and sulfide. As can be seen, the fit...make up such a large fraction of the meteorite, in the bulk meteorite. Table 1. The mean compositions of...major silicate components in chondrules from Semarkona, Bishunpur and Chainpur determined by E~A/SEM |
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