 | | Journal (article/letter/editorial) | | C. M. 0. ALEXANDER and D. J. BARBER: The Semarkona meteorite: First recorded occurrence of smectfte in...coarse-grained chondrule rims in the Allende meteorite: Origin, interrelationships and possible precursor...Ga and Ge in the system forsterlte- anorthlte-diopside. |  | | 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...pure endmember phases: 58 wt% anorthite, 21 wt% diopside, 11 wt% silica, and 10 wt% enstatite. No. of |  | | Journal (article/letter/editorial) | | elemental and potassium isotopic compositions of Semarkona chondrules Conel M. O’D. ALEXANDER1* and Jeffrey...report measurements of K isotope ratios in 28 Semarkona chondrules with a wide range of petrologic types...compositions of CPX-mesostasis pairs in 17 type I Semarkona chondrules, including two chondrules with radial...variations in K isotopic compositions were found. Semarkona chondrules do not record a simple history of Rayleigh-type...alkali contents of the cores of most chondrules in Semarkona were probably established at the time of final |  | | Journal (article/letter/editorial) | | in CK3 NWA 1559 (0.54 9 1.3 mm) consists of a diopside-rich interior (approximately 35 vol%) and an olivine-rich...interior contains irregular 3–15 lm-sized Al-bearing diopside grains (approximately 70 vol%), 2–20 lm-sized...lm-sized) patches of plagioclase with 2–18 lm-thick diopside rinds occur in several places just beneath the...around fine-grained, rimless CAIs that consisted of diopside, anorthite, melilite, and spinel. Individual AOIs...interiors. In AOI-1, coarse plagioclase grains with diopside rinds crystallized immediately below the olivine |  | | 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 |  | | 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) | | 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...and Ca allowed us to identify olivine, pyroxene, diopside, and metals. The combination X-ray maps of Na...distribution and relative abundances of feldspar and diopside (Fig. 4, Table 3). The chondrules selected for...each chondrite. modal analysis was to see if diopside was progressively crystallizing from glass with |  | 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...orthopyroxene + olivine + feldspar and the absence of diopside; P CO2 unconstrained; fO2 at QFM + 0.5 log units;...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 |  | | 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 |  | 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...terminal particle from track 154 and composed of Al-diopside with minor amounts of low-Ca pyroxene, Mg-rich...We analyzed two plagioclase (An60 and An95) and diopside standards (Valley and Kita, 2009; Kita et al....Müller, 1995). Similar exsolution textures in diopside were reported in a 4 lm terminal particle from...array on the Fe-poor side and spread from the diopside to the pigeonite fields. The large range in Ca |  | | 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) | | 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...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...et al. 2006). The mineralogy and petrology of Semarkona chondrules were studied extensively by Jones and |  | | 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) | | http://www.uark.edu/meteor LL~ Zoned chondrules in Semarkona: Evidence for high- and low-temperature processing...Abstract-At least 15% of the 10w-FeO chondrules in Semarkona (LL3.0) have mesostases that are concentrically...Sears et ai. (1999), who found a chondrule in Semarkona (LL3 .0) with concentrically zoned mesostasis...Nagahara et al. (1999) discusses two more zoned Semarkona chondrules, and interprets their compositional...systematic study of zoned chondrules as a class. Semarkona was chosen as the host chondrite to avoid the |  | 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) | | aczhang@nju.edu.cn (A.-C. Zhang). 1 Present address: Division of Earth and Planetary Sciences, Kyoto University...for oxygen in spinel, anorthite, forsterite, and diopside under anhydrous conditions are from Ryerson and...in spinel, forsterite, Al-poor enstatite, and diopside under anhydrous conditions are from Freer and...coefficients for oxygen in anorthite, forsterite, and diopside under hydrous conditions are from Giletti et al...anorthite and Al-rich enstatite, rather than Al-rich diopside. In addition, small spinel grains are typically |  | | 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...olivines and include enstatite, hedenbergite, and diopside. PECK (1984) also observed widely varied compositions...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 |  | | 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 |  | DeHart, John M., Lofgren, Gary E., Jie, Lu, Benoit, Paul H., Sears, Derek W.G. (1992) Chemical and physical studies of chondrites: X. Cathodoluminescence and phase composition studies of metamorphism and nebular processes in chondrules of type 3 ordinary chondrites. Geochimica et Cosmochimica Acta, 56 (10) 3791-3807 doi:10.1016/0016-7037(92)90171-e | Journal (article/letter/editorial) | | been analyzed in the chondrules of four of them (Semarkona, type 3.0; Krymka, 3.1; Allan Hills A77214,3.5;...present in Semarkona ( l&20,60,5% by number, respectively), group A5 chondrules in Semarkona being more...function of petrologic type Section # Meteorite *o"rCe+ Semarkona Bishunpur Krymka Chainpur ALHA Hedjaz...on the four analyzed chondrites underlined): Semarkona, lOO%A5; Krymka, Bishunpur, SO%AS: Cbainpur, ALRA77214...of Natural History, Smithsonian Institution (Semarkona polished thick section made at UCLA). BH, Robert |  | Joswiak, D. J., Brownlee, D. E., Matrajt, G., Westphal, A. J., Snead, C. J. (2010) Kosmochloric Ca-rich pyroxenes and FeO-rich olivines (Kool grains) and associated phases in Stardust tracks and chondritic porous interplanetary dust particles: Possible precursors to FeO-rich type II chondrules in ordinary chondrites. Meteoritics & Planetary Science, 44 (10) 1561-1588 doi:10.1111/j.1945-5100.2009.tb01192.x | Journal (article/letter/editorial) | | = kosmochloric augite, Ko-diop = kosmochloric diopside, Fo = forsterite, alb = albite, an = anorthite...fine-grained material we observed a 200 nm Ko-diopside crystal with well-faceted crystal faces in contact...Fe-sulfides decorating the perimeter of the Ko-diopside/glass assemblage. Two larger silicates, a Fo97...probably not petrologically related to the Ko-diopside shown in (b). b) Magnified conventional DF image...rectangular region in (a) showing diffracting Ko-diopside with attached Al-silicate glass and perimeter |  | | 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 |  | Brearley, Adrian J, Scott, Edward R.D, Keil, Klaus, Clayton, Robert N, Mayeda, Toshiko K, Boynton, William V, Hill, Dolores H (1989) Chemical, isotopic and mineralogical evidence for the origin of matrix in ordinary chondrites. Geochimica et Cosmochimica Acta, 53 (8) 2081-2093 doi:10.1016/0016-7037(89)90326-8 | Journal (article/letter/editorial) | | fine-grained matrix lumps and chondrule rims from Semarkona (GROSSMANet al., 1987). Transmission electron...extracting matrix materials intact from the host meteorite due to the small dimensions of matrix fragments...from this study (TAYLOR et al., 1984) and from Semarkona (GROSSMANet al., 1987), have been lacking. Consequently...subsequently isolated on two adjacent slices of the meteorite. Samples of the lump weighing 8 and 4 mg were...finely powdered in a precleaned agate mortar. (The meteorite was friable and easily powdered). A 7.5 mg split |  | | Journal (article/letter/editorial) | | / The halite-bearing Zag and Monahans (1998) meteorite breccias: Shock metamorphism, thermal metamorphism...10 0.06 0.2 0.03 0.3 0.11 Sub-calcic augite Diopside 1 55.0 0.24 0.21 0.37 8.9 0.39 26.0 7.9 0.10... 131 The halite-bearing Zag and Monahans (1998) meteorite breccias 1-20,um size silicate grains occur in...Regions-Matrix regions are those portions of the meteorite located between large clasts. These regions are... The halite-bearing Zag and Monahans (1998) meteorite breccias fractures heal) are present. The number |  | | Journal (article/letter/editorial) | | hibonite with minor spinel, and hibonite ± Al,Ti-diopside ± spinel spherules. Evidence of secondary alteration...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...radiating needles of inter-layered enstatite and diopside. BO chondrules are often enclosed by later-formed |  | | Journal (article/letter/editorial) | | carbonaceous chondrites (CCs), and in one ungrouped meteorite (Mueller 1968; Levi-Donati 1970; Rubin et al....matrices and chondrule rims of the two UOCs, Semarkona (LL3.00) and MET 00526 (L3.05) (Grossman and Brearley...thin sections of Semarkona and MET 00526 (two undesignated thin sections of Semarkona designated 101 and...chromite (Cr, Fe), forsterite (Mg), spessartine (Mn), diopside (Si, Ca), and rutile (Ti) were used as standards...fine-grained matrices and chondrule rims of two UOCs, Semarkona (LL3.00) and MET 00526 (L3.05) contain ubiquitous |  | | Journal (article/letter/editorial) | | which could have only been preserved if this meteorite was not subjected to any significant thermal metamorphism...have only been identified in clasts in one other meteorite, the LL3.1 ordinary chondrite Krymka (e.g., Semenenko...analysis by the Johnson Space Center Antarctic Meteorite Collection. QUE 99177 was classified as Antarctic...olivine for Si, Fe and Mg, orthoclase for Al and K, diopside for Ca, spessartine for Mn, chromite for Cr, apatite...clast is coarser-grained than matrix in the host meteorite. It contains olivine, amphiboles, sulfides, and |
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