 | | 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) | | 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 |  | 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...requiring aqueous activity in the meteorite parent body. Hematite and maghemite c-Fe2O3 are other Fe oxides...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) | | the transmission electron microscope (TEM) to meteorite studies, mineralogical investigations of carbonaceous...serpentine or smectite) and Fe-rich phases (magnetite, maghemite, or ferrihydrite). These differences are probably...described the occurrence of hydrous silicates in the Semarkona LL3 chondrite and observed that the ferromagnesian...had been altered to Fe”-bearing smectite and maghemite. Oxidation of matrix metal was proposed to account...magnetite in the matrix. The alteration assemblage in Semarkona is more similar to Mokoia than to Lance. Bishunpur |  | | 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 |  | Fu, Roger R., Weiss, Benjamin P., Lima, Eduardo A., Kehayias, Pauli, Araujo, Jefferson F.D.F., Glenn, David R., Gelb, Jeff, Einsle, Joshua F., Bauer, Ann M., Harrison, Richard J., Ali, Guleed A.H., Walsworth, Ronald L. (2017) Evaluating the paleomagnetic potential of single zircon crystals using the Bishop Tuff. Earth and Planetary Science Letters, 458. 1-13 doi:10.1016/j.epsl.2016.09.038 | Journal (article/letter/editorial) | | (1σ ; 42.6 ± 5.3 μT after excluding possible maghemite-bearing zircons), which is consistent with high-precision...dusty olivine-bearing chondrules from the Semarkona meteorite (Fu et al., 2014b), produces maps of the...580 ◦ C, most likely indicating the presence of maghemite or titanohematite (Fig. 3). Gee et al. (2010)...remanent magnetization (TCRM) most likely carried by maghemite, although a primary remanence carried by titanohematite...demagnetization argues in favor of maghemite. On the other hand, maghemite usually undergoes inversion to |  | | 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) | | 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...concentrations. Here we report results of a study of meteorite terrestrial weathering products using high-resolution...weathering products do not form before the fall of the meteorite. The work reported here has focused on determining |  | | 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...Madagascar (164) 221, (170) 141 mafic magmas (167) 1 maghemite (167) 283 magma chambers (167) 61, (167) 311,...(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 |  | 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...precipitation, resorption of some magnetite, and maghemite precipitation. Fredriksson et al. (1989) studied...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 |  | Alexander, C.M.O’D., Newsome, S.D., Fogel, M.L., Nittler, L.R., Busemann, H., Cody, G.D. (2010) Deuterium enrichments in chondritic macromolecular material—Implications for the origin and evolution of organics, water and asteroids. Geochimica et Cosmochimica Acta, 74 (15) 4417-4437 doi:10.1016/j.gca.2010.05.005 | Journal (article/letter/editorial) | | small spatial scales, and in bulk from meteorite to meteorite (Busemann et al., 2006; Alexander et al...isotopic fractionation processes occurred in meteorite parent bodies. In the CH and CB meteorites there...amongst the most isotopically anomalous of any meteorite studied (Alexander et al., 2007). Essebi is classified...alteration under well-con- Origin and evolution of meteorite organics and water 4419 Table 1 The new meteorites...classification, shock and weathering stages, and bulk meteorite insoluble C contents determined in this study |  | Harju, Ellen R., Rubin, Alan E., Ahn, Insu, Choi, Byeon-Gak, Ziegler, Karen, Wasson, John T. (2014) Progressive aqueous alteration of CR carbonaceous chondrites. Geochimica et Cosmochimica Acta, 139. 267-292 doi:10.1016/j.gca.2014.04.048 | Journal (article/letter/editorial) | | chondrites constitute one of the most primitive meteorite groups. There has been minimal thermal metamorphism:...Wasson and Rubin, 2009). There are additional bulk meteorite properties that correlate to different degrees...representative. A few tens of milligrams of each meteorite were gently crushed using an agate mortar and...binocular microscope. A small amount of each meteorite (5-10 mg) was washed with diluted HCl (6 M), rinsed...porphyritic olivine-pyroxene (POP) chondrule from this meteorite is given in Table 3. The slightly low analytical |  | Sutton, S., Alexander, C.M.O'D., Bryant, A., Lanzirotti, A., Newville, M., Cloutis, E.A. (2017) The bulk valence state of Fe and the origin of water in chondrites. Geochimica et Cosmochimica Acta, 211. 115-132 doi:10.1016/j.gca.2017.05.021 | Journal (article/letter/editorial) | | Fe XANES to determine the Fe valences of bulk meteorite powders in Orgueil (CI1), a number of CMs and...experienced varying degrees of alteration, and Semarkona (LL3.00). The total ranges of bulk Fe valences...Orgueil 2.77, CMs 2.40-2.63, CRs 1.46-2.54, and Semarkona 2.10. Combining previous estimates of the present...fractional water losses to have been: Orgueil 15-26 %, Semarkona 73-83 %, CMs 23-48 %, and CRs 39-62 %. The associated...CMs -676 ‰ to -493 ‰, CRs -527 ‰ to -56 ‰, and Semarkona -527 ‰ to 154 ‰. The CI, CM, CR and ordinary chondrites |  | | 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) | | Society, 1997. Printed in USA. Mineralogy of meteorite groups ALANE. RUBIN Institute of Geophysics and...shocked ordinary chondrites. Secondary minerals in meteorite finds that formed during terrestrial weathering...numbers of meteorites (including members of new meteorite groups; Table 1) from hot and cold deserts, the...variations 23 1 A. E. Rubin 232 TABLEI . Meteorite classification. Chondrites Carbonaceous chondrites...Wasson and Kallemeyn, 1990). 233 Mineralogy of meteorite groups TABLE 2. Minerals in meteorites. ~~ ~ |  | | 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 |  | Treiman, A. H., Morris, R. V., Agresti, D. G., Graff, T. G., Achilles, C. N., Rampe, E. B., Bristow, T. F., Ming, D. W., Blake, D. F., Vaniman, D. T., Bish, D. L., Chipera, S. J., Morrison, S. M., Downs, R. T. (2014) Ferrian saponite from the Santa Monica Mountains (California, U.S.A., Earth): Characterization as an analog for clay minerals on Mars with application to Yellowknife Bay in Gale Crater. American Mineralogist, 99 (11) 2234-2250 doi:10.2138/am-2014-4763 | Journal (article/letter/editorial) | | and akaganeite, as well as abundant magnetite/maghemite interpreted as authigenic (Vaniman et al. 2014)...Johnson Space Center. We are grateful to the ARES Division, Johnson Space Center for access to the SX-100...and Hutchison, R. (1989) The microstructure of Semarkona and Bishunpur. Geochimica et Cosmochimica Acta...alteration at the Lonar Lake impact structure, India: Implications for impact cratering on Mars. Meteoritics... R., and Alexander, C.M.O’D. (1987) The Semarkona meteorite: First recorded occurrence of smectite in |  | 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...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...653 formation of ferric phases (in particular, maghemite) in meteorites finds (Kohout et al. 2004; Bland |  | | 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...kangite krotite lakargiite loveringite machiite maghemite Magnéli phases magnesiochromite magnesioferrite...lonsdaleite loveringite machiite mackinawite maghemite Magnéli phases magnesio-arfvedsonite magnesiochromite |  | | Journal (article/letter/editorial) | | St. Louis MO 63130, USA. The present state of meteorite chemistry as established by Wasson and Kallemeyn...including Mg, Si, Sr. the Earth lies close to CI meteorite as previously established. The estimate of si...ratios in the Earth's mantle. as well as on the meteorite trend permils us to estimate the composition of...difference in their relative abundances among meteorite classes reflects differences in the dust!gas ratio...HIGH-DENSITY INTERSTELLAR GRAPHITE FROM THE MURCHISON METEORITE. S. Amari 1.2, E. Zinner), and R. S. Lewis-, IMcDonnell |  | | 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) | | magnetite and pyrrhotite grains in the martian meteorite are of magnetotactic bacterial origin. A6 Meteoritics...obtained from NASA; additional chips from each meteorite were examined petrographically at the Smithsonian...iron in a weathered sample of an equilibrated meteorite, with weight gains predicted for an unweathered...the carbonate globules present in the martian meteorite ALH 84001 have detected polycyclic aromatic hydrocarbons...origin and were claimed to be indigenous to the meteorite, perhaps derived from an ancient martian biota |  | | Journal (article/letter/editorial) | | studies, Hutchison et al. (1985) suggested that Semarkona (LL3) bore signs of alteration and may in fact...types 2 and 3. We present here TEM studies of Semarkona, Bishunpur, Chainpur, Krymka, Sharps and Tieschitz...metamorphism/metasomatism in ordinary chondrite parent bodies. Semarkona shows the greatest alteration and primarily in...The other major phase in the matrix is twinned maghemite which contains little or no Ni. Most of the Ni...69-1.75 1.49-1.52 1.29-1.32 0.97-0.99 0.86-0.88 Semarkona Bishunpnr range range 4.51-4.62 2.53-2.65 |  | | Journal (article/letter/editorial) | | OF THE METALLIC PHASES IN THE ALMAHATA SITTA METEORITE (FRAGMENT#051). Y. A. Abdu1, A. M. Gismelseed2...Khartoum, Sudan. Introduction: The Almahata Sitta meteorite fall was unique because asteroid 2008 TC3, the...large fragments of the 1947 Sikhote-Alin iron meteorite [2] fallen in the waterlogged deposits. In the...impact structures containing large boulder-sized meteorite rocks may be present. References: [1] Anfinogenov...Fonton S. S. 1959. In: The Sikhote-Alin iron meteorite shower. Part I. Ed.: V. G. Fesenkov and E. L. |  | | Book | | rate ratio of Mg/(Mg þ Fe) in a section of the Semarkona LL3.0 chondrite, constructed from magnesium and...it, it was just at this time that the Allende meteorite fell and the minerals contained within the so-called...Silliman Chair and being curator of the Yale meteorite collection. In a continuation of Karl’s foray...chemical histories both in the solar nebula and in meteorite parent bodies. It was in CAIs that the great discovery...interstellar medium, in the solar nebula, in meteorite parent bodies, and during atmospheric entry. Each |
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