 | | 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...anhydrous phases into calcite and Na, Fe smectite, respectively. In Semarkona the process possibly requires...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) | | model for trace metal sorption processes at the calcite surface: Adsorption of Cd2+ and subsequent solid...equilibria. L JEREMY B. FEIN and JOHN V. WALTHER: Calcite solubility in supercritical CO?-HP0 fluids. S....inside amoeboid olivine aggregates in the Allende meteorite. BERNARD SANJUAN and GIL MICHARD: Aluminum hydroxide...KULLERUD: Mercury ores from the New Idria Mining District: Geochemical and stable isotope studies. ERNST...C. M. 0. ALEXANDER and D. J. BARBER: The Semarkona meteorite: First recorded occurrence of smectite in |  | | Journal (article/letter/editorial) | | http://meteoritics.org The fine-grained matrix of the Semarkona LL3.0 ordinary chondrite: An induced thermoluminescence...origin, and history of the fine-grained matrix in Semarkona and develop techniques suitable for small samples...chondrites, which is very high relative to bulk Semarkona. The other induced TL properties of these samples...suggest that the cause of the luminescence in the Semarkona fine-grained matrix is forsterite. In some respects...respects the matrix TL data resemble that of Semarkona chondrules, in which the phosphor is forsterite |  | | Journal (article/letter/editorial) | | ZOLENSKY Earth Science and Solar System Exploration Division, NASA, Johnson Space Center, Houston, Texas 77058...minerals into the lunar regolith. The Bench Crater meteorite also provides a glimpse of the petrography of...this time we had assumed that the Bench Crater meteorite is anhydrous, with only dehydrated phyllosilicates...al., 1974). I have examined the Bench Crater meteorite, a chondrite recovered from the lunar regolith...reported recently by Zolensky et al. (1 996a). This meteorite measures only 3 mm in greatest dimension and exists |  | | 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 |  | | 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...of temperature on the composition of magnesian calcite overgrowths precipitated from seawater. BERNARD |  | | Journal (article/letter/editorial) | | Printedin U.S.A. + .oO The microstructure of Semarkona and Bishunpur C. M. O’D. ALEXANDER,“* D. J. BARBER...24, 1989) Abstract-The ordinary chondrites, Semarkona and Bishunpur, appear to have experienced in situ...examination of them, which supports this conclusion. In Semarkona, all but the most magnesian mafic minerals have...composition of the gas present during the alteration of Semarkona was not solar but was dominated by H20. The formation...grain-boundary fluid present. The alteration in Semarkona and Bishunpur is far from complete. Thermodynamic |  | | Journal (article/letter/editorial) | | locally exchanged with silicates, either in the meteorite or in underlying bedrock. Although carbonates...events, the latter of which occurred on primitive meteorite parent-bodies. Investigations to date have tended...pre-terrestrial carbonates in the ordinary chondrite Semarkona was inferred by Grady (1982) and subsequently...into a meteorite has important implications for the study of carbonates in Antarctic meteorite samples...largest stony meteorite recovered from Antarctica, weighed over 110 kg. The meteorite was found in the |  | | Journal (article/letter/editorial) | | light isotope enrichment for the LL3 chondrite Semarkona, to +2.7%0 per mass unit for the LL3 chondrite...was prevalent in CAI inclusions in the Allende meteorite. The oxygen anomaly led to the revision of theories...is evidence from these data that Bishunpur and Semarkona contain isotopically fractionated Cd. This is...to be enhanced in the heavier isotopes while Semarkona is depleted in these isotopes. Because the measurement...Isotopic ratios a of cadmium in whole rock meteorite samples Meteorite Type ALHA-77299,30 c,d H3 measured |  | | Journal (article/letter/editorial) | | Washington, 5241 Broad Branch Road, Washington, District of Columbia 20015, USA 2 GL, Carnegie Institution...Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA 3 Kingsborough Community...CI chondrites, LEW 85332 (C2), Kaba (CV3), and Semarkona (LL3.0). For the unheated CMs, the total ranges...lower (~10–40 °C) and the relative abundances of calcite and dolomite may play a more important role in...higher mole fractions of CO2 in their fluids. Semarkona and Kaba carbonates have some of the lightest |  | | Journal (article/letter/editorial) | | that, during partial melting of some asteroidal meteorite parent bodies, explosive pyroclastic volcanism...the precursor materials of these magmatic iron meteorite groups were similar in composition to unequilibrated...meteorites in the world's collections, some asteroidal meteorite parent bodies must have experienced complex processes...sufficient volatiles, and if some of the igneous iron meteorite groups originated on bodies having similar starting...by the Center for Meteorite Stdies, Arizona State University, and samples of Semarkona and Sharps by the |  | | Journal (article/letter/editorial) | | particles (IDPs) [10] and the Murchison (CM2) meteorite [11,12] show a band near 1450 cm -x (6.9/~m) which...which is due to primary carbonates (probably calcite). Marvin and Motylewski [1] reported the presence...carbonates, on Antarctic meteorites as a function of meteorite compositional group and weathering categories...Japan), breunnerite (Zillertal, Austria), and calcite (Chihuahua, Mexico). Also 230 measured were...Allan Hills (ALH) A77299 (H3), A L H A76009 (L6), Meteorite Hills ( M E T ) A78003 (L6) chondrites. Etched |  | | Journal (article/letter/editorial) | | apparently took place without change in bulk meteorite composition. from Ivuna were polished ultrathin...amounts of carbonate have been recently found in Semarkona (LL3) by Hutchison et al. (1987) and in Allegan...considering the complexity of the phase system of this meteorite, the values given here agree well with the observed...Kerridge 36 TABLE I. Analysis of the Orgueil meteorite (wt.%). Bulk SiO, TiO, AI,03 Cr,03 Fe,03 FeO...probably vaterite, possibly aragonite, rather than calcite, but this point requires further study. As noted |  | | Journal (article/letter/editorial) | | temperature mineral assemblages. In Murchison, Calcite has been observed in forsteritic inclusions (the...al., 1982), whilst in Renazzo the presence of calcite plus Fe,Mg,Mnrich carbonate within chondrules has...and are present as several different species: calcite (CaCO,; e.g. FUCHS et al., 1973; BUNCH and CHANG...possible that the different carbonate minerals (calcite, dolomite, breunnerite, etc.) may reflect a sequence...gas extracted should be from the dissolution of calcite, while the second would arise from Mg- and Fe-rich |  | | Journal (article/letter/editorial) | | chondrites. We studied bleached chondrules from Semarkona by ion microprobe for trace elements and H isotopes...chondrites, especially in the wellstudied falls Semarkona, Bishunpur, Chainpur, and Tieschitz, most of the...the highly unequilibrated ordinary chondrites, Semarkona (LL3.0) and Bishunpur (L3. I), led to our "rediscovery"..."rediscovery" of bleached chondrules. For Semarkona section USNM 1805-7, a 4 x 5 grid of 20 maps, each containing...Saratov Arriba Farmington Honolulu Knyahinya Semarkona Krymka Bishunpur Chainpur Hamlet Kelly Soko-Banja |  | | 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...marble BA sulfates BT minerals SA aragonite SA calcite SA gypsum Alachua County Valid through 1988. Search...Endicott Mountains NA Fairbanks Alaska NA Fairbanks District NT Fairweather Fault NT Glacier Bay NA Glacier |  | 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 |  | | Journal (article/letter/editorial) | | Amorsson S. ~stmann~o~r H. Ok&son J. Sigvaldason G. E. INDIA Krishnaswami S. ISRAEL Aizenshtat 2. Ben-Yaakov...MARTI:Nucleogenic noble gas com~nent~ in the Cape York iron meteorite 163 Book Reviews S. A. MORSE:“Lunar Bases and...RICHARDJ. REEDERand JOHNC. GRAMS:Sector zoning in calcite cement crystals: Implications for trace element...forsterite-bearing Ca-Al-rich inclusions in the Aliende meteorite . LAWRENCE R. BERNSTEIN and GLENNA. WAYCHUNAS:...Organic Ge~hemist~ Division, Minutes 1028 . 1030 Organic Geochemistry Division, Slate of Officers |  | | 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) | | armalcolite (165) 37 Asia (165) 129 1897 Assam India (167) 269 assimilation (170) 301 Atlantic Ocean...(171) 607, (172) 239 C-14 (165) 17, (171) 253 calcite (171) 253 calcium (164) 627, (170) 417 calcium-aluminium...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...Mountain (171) 95 Yunnan China (165) 1 Zagami Meteorite (173) 397 zircon (164) 409, (169) 291, (171) 591 |  | 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...chondrules with anorthite-normative mesostases in Semarkona (LL3.0) and Bishunpur (LL3.1) is produced at wavelengths...on a large ( - 800 pm) group A 1 chondrule in Semarkona (LL3.0) which contains induced TL and compositional...should be addressed. A 50.47 mg chip of the Semarkona (LL3.0) chondrite (USNM 1805) was cut into three |  | 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...and carbide crystallization, hydrous alteration, calcite precipitation, resorption of some magnetite, and...pentlandite was originally described in LL3.0 Semarkona, LL3.7 ALHA77278, and LL3.2/3.7 Ngawi (Taylor...Hutchison et al. (1987) described carbide veins in Semarkona matrix and a carbide that might be intermediate...cohenite and e-carbide (Fe2C). They concluded that Semarkona experienced multistage nebular and parent body |  | | 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) | | 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...concentrations of other siderophile elements in bulk meteorite samples. MORGAN et al. ( 1985) likewise inferred...hydrous phyliosilicates, a zeolite, Fe oxides, and calcite. It is possible that HZ0 and CO* in these alteration...and that reaction between this fluid and the meteorite would have resulted in the observed change in |  | | Journal (article/letter/editorial) | | voids. Iron may have been lost from the bulk meteorite, but most other elements merely underwent internal...and it was argued that aqueous alteration in Semarkona and Bishunpur also was a Parent body Phenomenon...redeposition of the leached material elsewhere in the meteorite, but Christophe Michel-Levy (1976) argued that...between the chondrules-a feature that renders the meteorite texturally unique-and generally abuts the opaque...Many voids are a preterrestrial feature of the meteorite. occurs within the smooth mesostasis. The marginal |
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