 | | 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 |  | | Journal (article/letter/editorial) | | oetrograuhic evidence for aqueous alteration in Semarkona, lead us to favour the aqueous alteration hypothesis...a way similar to that observed for samples of meteorite annealed dry above the order/& order temperature...hydrothermal annealing on a type 3.0 ordinary chondrite, Semarkona. and a type 3.4 ordinary chondrite, Allan Hills...feldspar in the high-form. EXPERIMENTAL Samples of Semarkona, ALHA 14, Sharps and Dhajala, typically 1.5 g...(TL vs. temperature) for samples of the Sharps meteorite annealed at 700-847’C and at 1 kbar pressure in |  | Matsunami, Satoshi, Ninagawa, Kiyotaka, Nishimura, Satoru, Kubono, Noriko, Yamamoto, Isao, Kohata, Masaki, Wada, Tomonori, Yamashita, Yoshihiko, Lu, Jie, Sears, Derek W.G., Nishimura, Hiroshi (1993) Thermoluminescence and compositional zoning in the mesostasis of a Semarkona group A1 chondrule and new insights into the chondrule-forming process. Geochimica et Cosmochimica Acta, 57 (9) 2101-2110 doi:10.1016/0016-7037(93)90096-f | Journal (article/letter/editorial) | | and compositional zoning in the mesostasis of a Semarkona group Al chondrule and new insights into the chondrule-forming...group Al, porphyritic olivine chondrule in the Semarkona (LL3.0) chondrite with induced thermoluminescence...w-t%, Fao.3-,,.5)and its mesostasis is highly anorthite-normative ( -52.5 wt%). The chondrule shows an...the TL of some chondrules with anorthite-normative mesostases in Semarkona (LL3.0) and Bishunpur (LL3.1)...on a large ( - 800 pm) group A 1 chondrule in Semarkona (LL3.0) which contains induced TL and compositional |  | | 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) | | porphyritic olivine compound chondrule from LL3.0 Semarkona that experienced limited remelting Alan E. RUBIN...April 2006) Abstract–Chondrule D8n in LL3.0 Semarkona is a porphyritic olivine (PO) chondrule, 1300...with low-FeO overgrowths in the LL3.0 chondrite Semarkona. The chondrule contains metal blebs (formed by...I examined thin section AMNH 4128-2 of LL3.0 Semarkona in transmitted light and in backscattered electron...Mesostasis mixture of pure endmember phases: 58 wt% anorthite, 21 wt% diopside, 11 wt% silica, and 10 wt% enstatite |  | Sears, Derek W. G., Morse, Andrew D., Hutchison, Robert, Guimon, R. Kyle, Jie, Lu, Alexander, C. M. O'D., Benoit, Paul H., Wright, Ian, Pillinger, Colin, Xie, Tian, Lipschutz, Michael E. (1995) Metamorphism and aqueous alteration in low petrographic type ordinary chondrites. Meteoritics, 30 (2) 169-181 doi:10.1111/j.1945-5100.1995.tb01112.x | Journal (article/letter/editorial) | | Indiana 47907, USA 5Present address: Natural Science Division, Missouri Baptist University, S1. Louis, Missouri...chondrules, chondrules were hand-picked from the Semarkona (petrographic type 3.0), Bishunpur (3.1), Chainpur...composition determined. The TL data for chondrules from Semarkona and Bishunpur scatter widely showing no unambiguous...(up to ~8000%o SMOW) are observed in certain Semarkona chondrules, a confirmation of earlier work. With...increase, the spread of values within an individual meteorite decreases, and peak temperatures and peak widths |  | | Journal (article/letter/editorial) | | doi: 10.1111/maps.13194 Primary feldspar in the Semarkona LL3.00 chondrite: Constraints on chondrule formation...time scales. We undertook a careful study of Semarkona (LL3.00) and observed feldspar in 18% of chondrules...Al-rich chondrules in OCs also contain primary anorthite that is useful for age dating using Al-Mg systematics...that crystalline albite is present within some Semarkona chondrules, but did not indicate whether it is...within chondrules of the LL3.00 chondrite Semarkona. Semarkona is the least thermally metamorphosed OC |  | | Journal (article/letter/editorial) | | fine-grained, rimless CAIs that consisted of diopside, anorthite, melilite, and spinel. Individual AOIs in carbonaceous...aqueous alteration after fine-grained melilite and anorthite were leached out. Chondrite groups with large...major olivine; major to minor Ca-pyroxene; minor anorthite; accessory metallic Fe-Ni and perovskite; and...chondrites (e.g., Acfer 094 and Adelaide), and in the Semarkona LL3.0 ordinary chondrite (e.g., Grossman and Steele...lmsized porous patches of Al,Ti-diopside and anorthite spinel (Table 1; Fig. 5). As in AOI-1 from NWA |  | | 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 |  | | 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) | | 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...Ca-Fe plots for the olivine and normative albite, anorthite, and quartz plots for the chondrule mesostasis...are present in the essentially unmetamorphosed Semarkona chondrite (Al, A2, A5, and Bl, which can be considered |  | 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...olivine, Al- and Ti-bearing clinopyroxene and anorthite feldspar (An97). Mineralogically, Bidi resembles...ferromagnesian chondrules. This is supported by high anorthite content of the plagioclase feldspar, overall bulk...however extra care was required when analyzing anorthite which was susceptible to irradiation damage, therefore...abundances are olivine 34%, clinopyroxene 33% and anorthite 33% showing that Bidi is composed of essentially |  | 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) | | are mainly composed of Al-rich enstatite and anorthite with minor amounts of mesostasis, these regions...values ( 7&), which are lower than those of anorthite and the mesostasis (including augite therein)...melting in chondrule-forming regions; whereas the anorthite and mesostasis could have experienced further...aczhang@nju.edu.cn (A.-C. Zhang). 1 Present address: Division of Earth and Planetary Sciences, Kyoto University...of elements in the selected area. Spinel and anorthite grains in sapphirine-bearing objects were used |  | | Journal (article/letter/editorial) | | account for more than 85% of all meteorites in the meteorite collection (e.g., Krot et al. 2005). Most OCs...were available in the University of New Mexico meteorite collection. Analytical techniques used include...albite-rich rims, typically a few micrometers wide, on anorthite-rich cores (Fig. 5). There is a sharp boundary...present. In this chondrule, the composition of the anorthite-rich cores of grains is An73Ab25Or1, and the albitic...5. Plagioclase grains consist of lighter gray anorthite-rich cores (An73Ab25Or1) surrounded by darker |  | | Journal (article/letter/editorial) | | Solar System: The First 180 Million Years Allende Meteorite. Photo courtesy of J ames St. J ohn Charles K...individual chondrules has not been reported in bulk meteorite analyses (Zhai et al. 1996). Further, this heterogeneity...from the Allende CV3 carbonaceous chondrite. Anorthite (not labeled) is also present in this inclusion...of a glass-rich chondrule from the Murchison meteorite, with a texture that strongly indicates that it...Chondrules in unequilibrated chondrites (e.g. the Semarkona meteorite) that experienced minimal degrees of parent-body |  | | Journal (article/letter/editorial) | | primitive ordinary chondrite known is Semarkona, although even this meteorite has experienced a small amount...95544. NWA 3127 was a previously unclassified meteorite, though it closely resembles NWA 1756 in thin...is considered to be paired with GRO 95502, a meteorite that had already been chosen for this study. The...number of CL images were obtained of chondrules in Semarkona using a single-channel photon detector attached...(USGS), Reston, Virginia. Color CL images of Semarkona were also obtained using the ELN-3R luminoscope |  | | Journal (article/letter/editorial) | | , 4.4% hibonite-rich, and several type C and anorthite-spinelrich inclusions) and 73 AOAs in 15 Ningqiang...occurrences of Ca-rich armalcolite and geikielite in a meteorite, and the second occurrence of phase T (an unidentified...2007). To gain a deeper insight into this unique meteorite and a better understanding of the variety of materials...described by Jiang et al. (2004). Samples of Allende meteorite were treated and analyzed in the same way for...example, glass-1, -2, and -3 in Fig. A1c have anorthite-, Al-rich diopside (Aldiopside, defined as diopside |  | | Journal (article/letter/editorial) | | 3Physical Research Laboratory, Ahmedabad 380 009, India of Natural History, Chicago, IL 60605, and Department...isotopic compositions reflect the iron-group of the meteorite (H, L, or LL). Isotopic uniformity of H3 to H6...identification of genetic association with other meteorite types (achondrites and iron) and for recognition...combination of these processes has left each planet and meteorite parent body with a distinctive oxygen isotopic...fractionation line is defined as: 6”O = 0.526”0. For a meteorite sample, an excess in “0 can be defined as A”0 |  | | Journal (article/letter/editorial) | | and opaque chondrule rims in Bishunpur, Krymka, Semarkona, Chainpur (all LL3), Tieschitz and Sharps (both...pre-solar, component is limited to 3 vol.% of each meteorite, so equilibrium condensate was not the carrier...During our work, however, it transpired that Semarkona, LL3.0, and Bishunpur, LL3.1, are partially hydrothermally...Meteorites studied Name Bishunpur Chainpur Krymka Semarkona Sharps Tieschitz Class LL3.1 LL3.4 LL3.0 LL3...and chondrules are most clearly shown in this meteorite, so most of our textural study was performed on |  | | Journal (article/letter/editorial) | | of UOCs. The similarity of chondrule and whole meteorite isotope compositions suggests that for many UOCs...heavier oxygen isotopic composition than the bulk meteorite (Mayeda et al., 1989). We aim to explore mineralogical...EXPERIMENTAL METHODS AND SAMPLES Powdered bulk meteorite samples of Parnallee (LL3.6), Dhajala (H3.8),...16O-poor compositions than the measured bulk meteorite. This anomaly is due to the contribution of 16O-rich...16O-rich matrix to the compositions of this bulk meteorite sample (Clayton et al., 1991). For the Parnallee |  | | Journal (article/letter/editorial) | | across). It consists of olivine, Al-diopside, anorthite, and minor spinel with a layered texture. CAIs...ARCs in SaU 290 consist of diopside, forsterite, anorthite, Al-enstatite, spinel, and mesostasis or glass...diopsiderich, Al-enstatite-rich, glass-rich, and anorthite-rich chondrules. Bulk compositions of most ARCs...origin of CAIs and ferromagnesian chondrules. Anorthite and Al-enstatite do not coexist in a given ARC...Oman in 2005 (Bartoschewitz et al. 2005). This meteorite was once classified as an anomalous E-chondrite |  | | Journal (article/letter/editorial) | | water to a greater degree than the rest of the meteorite. The overall degree of hydration in CR chondrites...001 Total= 3265.0 lOraham&&(1985) 2-Antarctic Meteorite Newsletter(1989a) 3.Yanai and Kojima (1987) CKojima...CKojima and Yanai (1988) 5-Antarctic Meteorite Newsletter(1989b) 6-Bischoff a& (1991,1993a) Abbreviationsfor...in Antarctica. As is the case for some other meteorite groups, expeditions to Antarctica have brought...Y79349.5 consisting of a core of Ca pyroxene and anorthite (AN) surrounded by an aggregation of forsterite |  | | Journal (article/letter/editorial) | | enstatite and olivine, with lesser amounts of albite, anorthite, Cr-spinel, troilite and Fe,Ni metal. Texturally...BM 69052) and a second, smaller piece of the meteorite was from the Field Museum, Chicago {Cat. No. Me...were made from thin slices of each sample of the meteorite, cut by wire sawing. At each stage of the preparation...enstatite. but lesser amounts of olivine, albite, anorthite, troifite, Fe,Ni metal Cr-spine1 and ferrihydrite...They have been observed in aiblrz (Fig. IO), anorthite (Fig. 9). troilite and C’r-spmel (I-Q. ; L s but |  | | 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 |  | JOSWIAK, David J., BROWNLEE, Donald E., MATRAJT, Graciela, WESTPHAL, Andrew J., SNEAD, Christopher J., GAINSFORTH, Zack (2012) Comprehensive examination of large mineral and rock fragments in Stardust tracks: Mineralogy, analogous extraterrestrial materials, and source regions. Meteoritics & Planetary Science, 47 (4) 471-524 doi:10.1111/j.1945-5100.2012.01337.x | Journal (article/letter/editorial) | | missing Presolar SiC presentd TP not studied An = anorthite, Aug = augite, En =enstatite, Fay = fayalite,...Al-diop+Augite+En99 En99.6 Fo41–43 Augite+Fo97+Anorthite Pyrr+Pent+Sph+Fo79 Fass+Anorth Kool grain En99...pentlandite, Fo = forsterite, Plag = plagioclase, An = anorthite, Spnl = spinel, En = enstatite, Cmpr aero = compressed...(apparently) layered Fo97, Al- and Ti-rich augite, and anorthite (with domains of SiO2 glass) and is likely an...possible layer texture. Fo = forsterite, Anor = anorthite. White regions in interior of mineral map are |
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