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| electron microscopy of chondrule minerals in the Allende meteorite : constraints on the thermal and deformational...solar nebula prior to or during accretion of the meteorite parent bodies. The textures and mineralogy of...Miiller et al. : Chondrule minerals in the Allende meteorite heat source, precursor material, cooling...defects, precipitates, grain and phase boundaries). Allende is one of the best studied meteorites, but little...have chosen the Allende CV carbonaceous chondrite for our study, because this meteorite belongs to the |
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| ordinary chondrites. The fall of the Allende meteorite in Mexico, a CV3 class chondrite, initiated prolific...although ordinary chondrites are the commonest of meteorite classes falling to Earth, this may relate to the...in the sky alongside collection of the fallen meteorite, only three such cases being up to quite recently...(eds) 2006. The History of Meteoritics and Key Meteorite Collections: Fireballs, Falls and Finds. Geological...Cottage, and again in the Bohemian stone (the meteorite Tabor 1753?) similar smaller globules, some of |
 | Papike, James J., Simon, Steven B., Burger, Paul V., Bell, Aaron S., Shearer, Charles K., Karner, James M. (2016) Chromium, vanadium, and titanium valence systematics in Solar System pyroxene as a recorder of oxygen fugacity, planetary provenance, and processes. American Mineralogist, 101 (4) 907-918 doi:10.2138/am-2016-5507 | Journal (article/letter/editorial) |
| Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, U.S.A. 2 Department of Geophysical...with increasing Ca content from orthopyroxene to pigeonite to augite. In addition, it is noted that V3+ is...augite-fassaite (monoclinic space group C2/c) and pigeonite (monoclinic space group P21/c) vs. orthopyroxene...units is + + – –). (b) The crystal structure of pigeonite, space group P21/c, portrayed as a projection...“optimal phase boundary”) between orthopyroxene and pigeonite. 909 PAPIKE ET AL.: Cr, V, AND Ti VALENCE SYSTEMATICS |
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| identification has elucidated many aspects of meteorite formation. Of particular interest are five phosphate...calcium- and aluminum-rich silicates in the Allende meteorite, a Type 1II carbonaceous chondrite which fell...(Mason, 1962), when I wrote an account of the meteorite minerals then recognized, see Table 1, the list...s Ti0 2 Formula Accessory in Odessa iron and Allende (CellI) Rare, in ureilites Rare, in ureilites Accessory...In Coorara and Tenham chondrites Accessory in Allende (CcllI) Rare accessory in some irons Rare accessory |
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| plagioclase. Pigeonite/diopside exsolution lamellae on (001) are frequently observed in Allende granular...cooling rates between 7 and 2%/h. Coarsening of pigeonite/diopside exsolution lamellae takes place in the...same temperature range than those deduced from pigeonite/diopside exsolution lamellae. Our estimates must...olivine pyroxene (GOP) chondrules from the Allende meteorite was published by Miiller et al. ( 1995). In...solar nebula prior to or during accretion of meteorite parent bodies (e.g., Grossman, 1988). Neither |
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| University ofOxford, Oxford OX] 3PR, England Whole meteorite samples taken from different individuals of Bruderheim...compared for a portion of the lunar nearside (30-50 DE. and 0-24 ON.) in the Taruntius and Macrobius quadrangles...pyroxene, magnetite [Fe2+0) [Fer03) and other meteorite minerals has been to assume secondary reactions...also by fundamental radiation laws (Arrhenius and De, 1973). A more inclusive model, taking into account...editor, Wiley, N.Y., 133-156. Arrhenius, G. and B.R. De, 1973. Equilibrium Condensation in a Solar Nebula |
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| formation and crystallization of SA-I, a basaltic Allende plagioclase-olivine inclusion ALLEN K. KENNEDY...basaltic plagioclase-olivine inclusion (POI) in Allende, has concentric textural and mineralogic zones...unusual plagioclase-olivine inclusion (POI) in Allende. A basaltic composition, suggesting igneous differentiation...to calculate trace element concentrations in pigeonite and nepheline, respectively, as no standards for...SA-I (Fig. la), a 2.4mm diameter inclusion from Allende, is its similarity to unequilibrated eucrites, |
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| where R = crate ring rate, m = moon, and p = meteorite parent body. In terms of this relation, the above...cometary origin can be ruled out for all stony meteorite classes that have gas-rich members. This includes...crystal from the Murchison meteorite. A REINVESTIGATION OF THE LODRAN METEORITE Richard W. Bild, John T...California Los Angeles, CA 90024. The Lodran meteorite was described by Tschermak. He reported a friable...ABLATION OF AN OLIVINE WITH FUSION CRUSTS ON THE ALLENDE AND MURCHISON METEORITES M.B. Blanchard*, G.G. |
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| that some regions of this apparently brecciated meteorite may be subtype 2.9. The suite of CAIs in Paris...2014). However, in oxidized CV3 falls such as Allende, many CAIs (e.g., Wark 1981; Krot et al. 1995)...(BSE) images of typical regions of the Paris meteorite. RESULTS Petrography Paris appears to be brecciated...might be a fresh fall, there is evidence that the meteorite has experienced moderate terrestrial weathering...the petrologic and geochemical features of this meteorite to those of other CM chondrites whose aqueous |
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| TIBOOBURRA, A NEW AUSTRALIAN METEORITE FIND, AND OTHER CARBONACEOUS CHONDRITES OF HIGH PETROLOGIC GRADE...Petrological evidence suggests that. like the Allende meteorite. Tibooburra is a CV3 chondrite which has experienced...effects associated with the fall of the Karoonda meteorite in 1930 remain unrivalled in Australia to this...studies of the composition and mineralogy of this meteorite ...classification is the most appropriate for the meteorite. McSween (1979). in his review of the carbonaceous |
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| solar nebula signatures in the matrix of the Allende meteorite Frank E. Brenker *, Herbert Palme, Susanne...Abstract Carbonaceous chondrites of type 3 (e.g. Allende) are among the most primitive meteorites. They...metamorphism and/or aqueous alteration on the meteorite parent body may have erased mineralogical evidence...nebular processes. The major fraction of Ca in the Allende matrix is contained in relatively large, 20^50...implying that the CFA in the Allende matrix formed in the solar nebula as the Allende parent asteroid has never |
 | Krot, Alexander N., Yurimoto, Hisayoshi, Hutcheon, Ian D., Chaussidon, Marc, MacPherson, Glenn J., Paque, Julie (2007) Remelting of refractory inclusions in the chondrule-forming regions: Evidence from chondrule-bearing type C calcium-aluminum-rich inclusions from Allende. Meteoritics & Planetary Science, 42 (7) 1197-1219 doi:10.1111/j.1945-5100.2007.tb00569.x | Journal (article/letter/editorial) |
| chondrule-bearing type C calcium-aluminum-rich inclusions from Allende Alexander N. KROT1, Hisayoshi YURIMOTO2, Ian D...silicate materials from the CV carbonaceous chondrite Allende. The CAIs consist of lath-shaped anorthite (An99)...forsteritic olivine (Fa6–8) and low-Ca pyroxene/pigeonite (Fs1Wo1–9). The relict grains are corroded by...enriched in spinel is overgrown by coarse-grained pigeonite (Fs0.5–2Wo5–17), augite (Fs0.5Wo38–42), and anorthitic...olivine and low-Ca pyroxene/pigeonite in ABC and TS26, and the pigeonite-augite rim around 93 are 16O-poor |
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| 50-60 " C k leads to the development of coherent pigeonite/augite exsolution lamallae on (001). A final wavelength...were obtained from the wavelength of pigeonite/augite or pigeonite/diopside exsolution lamellae on (001)...temperatures between 1350 and 1200 "C were obtained for Allende granular olivine pyroxene (GOP) chondrules. This...clinoenstatite, pigeonite, dendritic augite, and a lamellar intergrowth of pigeonite and augite on (001)...clinoenstatite grain (out of two grains studied). Pigeonite occurs either as an individual phase with or without |
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| contrast without phase separation, occurrence of pigeonite and diopside domains predominantly elongated along...augite or diopside with space group C2/c and pigeonite with space group P21/c at room temperature (Buseck...apigeonite, baugite 储 bpigeonite, c*augite 储 c*pigeonite; for “100” lamellae the relationships are analogous...was determined by measuring the widths of the pigeonite and diopside lamellae separately for “001” exsolution...individual pigeonite and diopside lamellae or pairs of lamellae, respectively. Pigeonite (P21/c) and |
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| nineral frorn Bulgaria Augite, sector-zoning -pigeonite rrlscibility gap, for pfroxenes fron lunar basalt...absorption spectra of a Tir+ fassaite from the Allende meteorite: A discussion discredited TO VOLUME I37...fassaite frorn the Allende meteorite: reply with E. Dowty Tir+ fassaite fron the Allende neteorite, crystal...L097 Clinoptilolites in sedirnentary rocks of Mexico 287 COHEN,LEWISH., with W. Klenent, Jr. Deternination...clinohurnite gladite 594 4L2 clinohunite natrolite pigeonite (lurar), donains (abstr.) 1106 cavansite ferrian |
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| the carbonaceous chondrites. especially those in Allende attracted considerable attention for the reason...(1980). DESCRIPTIONS ALH-770/5 An antarctic meteorite ALH-770 15 was classified as an L-3 chondrite...of separated fragments from a hibonite-bearing Allende inclusion. Proc. Lunar Planet. Sci. Conf. 9th....and W. Compton. 1974. Excess 26Mg in the Allende meteorite. Nature 251. 495-497. Grossman, L.. 1972....chemistry of Ca-Al-rich inclusions in the Allende meteorite. Geochim. Cosmochim. Acta 39. 433-454. Grossman |
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| and coarse-grained chondrule rims in the Allende meteorite: Origin, interrelationships and possible precursor...chondrule rims and two composite samples from CV3 Allende were determined by instrumental neutron activation...Three rare nonporphyritic CV chondrules (from Allende, Leoville and Vigarano) were analyzed by broad-beam...in the chondrules and 0.5 to 2X those in bulk Allende. Rims as a group are more homogeneous than chondrules...rims. MISAWA and NAKAMURA (1986a.b) analyzed ~20 Allende chondrules by isotope dilution techniques supplemented |
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| Laboratoire de Geochimie et Cosmochimie - Institut de Physique du Globe et Departement des Sciences de la Terre...TREMORGIO (CANTON TICINO) AS A POSSIBLE QUARTERNARY METEORITE IMPACT CRATER IN THE SWISS ALPS Kurt Bachtiger...the author had, some years ago, the idea of a meteorite impact crater in the Quarternary, i.e. 20-50,000...some interpretations will be attempted. 171 K Meteorite Type (ppm) johnstown (whole rock) Di 853...Total Ar 39_Ar40 age (G.Y.) 4.38 4.07 maximum Meteorite minimum Bjurbole 4.12 3.46 3.96 3.98 1.62 |
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| inclusions studied were from I5 thin sections of Allende and one each from the Adelaide. Leoville, and Vigarano...diameter, associated with perovskite were observed in Allende inclusion 5ALLB6. This is only the second meteoritic...spine1 (~5%) and abundant plagioclase ( 30-60%). Allende inclusions SA-1 and BG82DHlA have been described...tabular pyroxene grains. The pyroxenes are Fe-poor pigeonite surrounded by diopside. Spine1 is rare and, where...fassaite, diopside, Al-rich enstatite and Fepoor pigeonite (Table 6). Several different pyroxenes may occur |
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| this low ratio to galactic nucleosynthesis and meteorite age dating are briegy discussed. INTRODUCIlON...initial ‘&Pu abundance in the solar system and the meteorite ‘“Pu chronometer have been plagued by the lack...et al. (1969a) on the whitlockite of the same meteorite (0.035)-implying Pu-U fractionation. Secondly...incorrect “?%I/~~% ratio. Since both groups contain an Allende inclusion and since age differences as large as...review by Irving a coarse-grained inclusion in Allende, and a whole(1978)]. This assumption is particularly |
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| consist of magnesian low-Ca pyroxene, AI-Ti-Crrich pigeonite and augite, forsterite, anorthitic plagioclase...plagioclase, FeN i-metal/sulfide nodules, interstitial pigeonite overgrown by augite, and crystalline mesostasis...range in composition from enstatite (WOl~S) to pigeonite (WOS- 10) to augite (W0 30--4o); diopsidic pyroxenes...range in composition from low-Ca pyroxene to pigeonite to augite; pyroxenes in AOAs have diopsidic compositions...fine-grained Ca-rich material, composed of Al-rich pigeonite and auigite, anorthitic plagioclase, and abundant |
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| 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. ~~ ~ |
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| particularly so when the minin pyroxenesfrom the Allende meteorite (Table 3, no. 4). erals concerned are abundant...(Fs) 3. clinoenstatite 4. clinoferrosilite 5. pigeonite B. Mn-Mg pyroxenes 6. donpeacorite 7. kanoite...pyroxenes.The widely acceptedterms such as augite, pigeonite,omphacite, and aegirine-augitee have been retained...Table 3, analysis I for pyroxene from the Allende meteorite(Mason, 1974). t Cameronand Papike(1981),TabteA3...diopside \ lhedenbergite \ c2/ c ou9ite \ pigeonite clinoenstotite clinoferrositite I 50 M92Si205(En) |
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| by the IMACNMNC, including 17 from the Allende CV3 meteorite (Ma, 2015a) and high-pressure phases such...kaersutite ureyite omphacite orthopyroxene pigeonite potassic-chloro-hastingsite pyroxferroite rhodonite...perrierite perryite PGE-dominated alloys phlogopite pigeonite plagioclase plagionite platinum pleonaste portlandite...newly-identified refractory mineral tistarite (Ti2 O3 ) in Allende along with corundum and khamrabaevite (TiC) grains...khamrabaevite (TiC) grains in a chondrule from the Allende CV3 chondrite (Ma and Rossman, 2009a). BSE image |
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| chondrules from the Allende meteorite KEIJIMISAWA'.'J* AND TAKASHI FUJITA" 'Antarctic Meteorite Research Center...composition, and two non-BO chondrules from the Allende meteorite have been measured by thermal ionization mass...ferromagnesian and refractory precursor components of the Allende chondrule may have been formed from isotopically...heterogeneous reservoirs. In the nebula region where Allende chondrules formed, recycling of chondrules and...our continuing work is to investigate whether Allende chondrules are related to CAIs, and if so, to use |
