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| Ti2O3, a new refractory mineral from the Allende meteorite Chi Ma* and GeorGe r. rossMan Division of...corundum crystals within a chondrule from the Allende meteorite. The mean chemical composition determined...oxide, Allende meteorite introduCtion During a nanomineralogy investigation of the Allende meteorite, a...corundum-rich cluster of refractory grains in situ in an Allende chondrule. Electron microprobe, high-resolution...situ in a ferromagnesian chondrule from the Allende meteorite, along with about 30 corundum (Al2O3) grains |
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| Ar, Kr and Xe on pulverizedsamples of the Allende meteorite at 113*K has been measured. The observed pattern...KIRSTEN(1968) on solubilities of rare gases in enstatite at ~1800°K show that any attempt at explaining...area of two size fractions of pulverizedAllende meteorite, a type III carbonaceous chondrite (KING et al...described by BEEBEet al. (1945). (The use of the Allende meteorite is not completely appropriate here, since... (1971) have presented evidence that the Allende meteorite h&sremained relatively undisturbed following |
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| 08.009 An attempt to separate Q from the Allende meteorite by physical methods SACHIKO AMARI,1,* SHIHO...separated a Q-rich floating fraction from the Allende meteorite into ten fractions by a combination of colloidal...only after Lewis et al. (1975) dissolved the Allende meteorite and measured noble gases of the residues that...obtained a residue, which comprised ⬃0.5% of the meteorite, and found that the concentrations of all five...that of the bulk meteorite and that most of the trapped noble gases of the bulk meteorite were preserved |
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| CORDIERITE AND ALUMINOUS ORTHOENSTATITE IN THE ALLENDE METEORITET Lours H. Fucus, Argonne n"ational Laboratory...meteoritic occurrence of cordierite, in a nodule in the Allende Tlpe III carbonaceouschondrite, is reported. X-ray...formed as a highly fractionated system Lvithin the meteorite or as part of a chemical-pressure environment...environment foreign to that indicated for the meteorite. INrnotucuort The first meteoritic occurrenceof cordierite...AIIende chondrite. This meteorite, which fell near Parral, Chihuahua, Mexico on February 8, 1969,is a |
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| Type 0.97076 1 II Carbonaceous Type Allende Allende 1st.) LeOVllle Yamato-6903(c)'** 1. {0.84640...Alberta. Edmonton: k. Centre d’Etudes Nucltaires de Saclay: I. U.S.G.S. ***The alphabetical names of...(~1 G) WEIGH (1,0,5nL)- i ! ;70 ML 1211 Htl METEORITE (1""2G) - of TI. Zr and Hf in stony A surface...minerals such as TIN and Tic. especially in the enstatite chondrites, may not have been decomposed. When...ordinary chondrites are only . S’, lower. but the enstatite chondrite. Abee. is _ SO”,,and the LL chondrite |
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| RELATIONS OF SULFIDE, SULFATE AND SULFUR IN ORGUEIL METEORITE Manuel N. Bass NASA Manned Spacecraft Center...concurrently forming cracks in unheated portions of the meteorite. The minerals of Orgueil indicate a many-stage...recognized for some time by its occurrence in meteorite fusion crusts. Also spherules of wustite have...calculations suggest a method of de ducing equilibration temperatures of enstatite chondrites and achondrites...achondrites. Activity coefficients of enstatite and ferrosilite as well as free energies, enthalpies and entropies |
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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 |
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| 94. Pergamon Press, Printed in Great Britarn Allende inclusions: volatile-element distribution and evidence...Abstract-Neutron activation data on 14 trace elements in Allende bulk samples and in fractions of spheroidal Ca-Al-rich...been found. We propose that the large size of Allende spheroidal inclusions indicates an origin by incomplete...of large refractory inclusions in ordinary and enstatite chondrites refiects complete vaporization of presolar...inclusions. From the composition and alies in Allende materials which could not be undermineralogy, MARVINet |
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| elements in Ca-Al-rich inclusions in the Allende meteorite LAWRENCE GROSSMAN* Dept. of Geology and...activation analysis of C&Al-rich inclusions in the Allende carbonaceous chondrite reveals enrichments of 22...depletion of refractory elements in the ordinary and enstatite chondrites relative to the carbonaceous chondrites...elements in Ca-Al-rich inclusions in the Allende meteorite 1121 was the temperature variation of P...of mineralogy of the Ca-Al -rich inclusions in Allende (KING et al., 1973). Refractory trace elements |
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| meteorites-VIII. Noble gases, carbon and sulfur in Allende (C3) meteorite heated at 400-1000°C GREGOR\ F. HERZ~G... Abstract-Noble gases. C and S are lost from Allende samples heated for 1 week at temperatures of 400-1000-C...trace elements-Bi, Co. Ga. In. Se and T&-in the Allende (C3) chondrite. all but Co being mobile to some...principally in organic compounds (cf. VDOVYKIN.1967): in Allende it probably exists as a thin-film coating on mineral...SRINWASANet al. (1978) for examples of such studies of Allende]. However such experiments differ from the integral |
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| Prmted in Great Br~tam Noble gases in the Allende and Abee meteorites and a gas-rich mineral fraction:...NeKrXe in Allende (C3V) and an Allende residue insoluble in HF-HCI, and Xe in Abee (E4). In, Allende, chromite...8.7) and anomalous release it at -850°C (bulk meteorite) or 1000°C (residue). Mineral Q. containing most...as follows over the peaks% the release curve: Allende 1000” (75%), 1300” (25%); Abee (data of HOHENBERG...possible candidates are troilite and silicates for Allende, and djerfisherite, troilite and silicates for |
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| type III carbonaceous chondrites such as the Allende meteorite are composed primarily of these minerals and...U content of the lunar interior, both from the Allende analogy and the high heat flow, indicates a high...chondrites (circles and solid lines)and versus Allende Ca-A1rich inclusions (triangles and dashed lines)...the Allende meteorite. This is a good agreement between the lunar surface rocks and the Allende inclusions...composition of a Ca-A1 rich inclusion in the Allende meteorite which is taken here as another approximation |
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| and origin of inclusion matrix and meteorite matrix in the Allende CV3 chondrite ALAN S.KORNACKI* and...Abstract-The two textural varieties of olivine-rich Allende inclusions (rimmed and undimmed olivine aggregates)consist...(inclusion matrix) that differs from the opaque meteorite matrix of CV3 chondrites by being relatively depleted...material. Olivine is the most abundant mineral in Allende inclusion matrix; clinopyroxene, nepheline, soda&...crystal structure). Defocusred beam analyses of Allende matrix materials demonstrate that: (1) inclusion |
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| inNorthern Ireland ~~ern~n~l ~actionations among enstatite chon~ites PHILIP A. BAEDECKER* and JOHN T. WASSON...Abstract-Neutron activation data on 14 elements in eight enstatite-chondrite falls are reported. These and literature...E6 chondrites. The low degree of oxidation of enstatite chondrite materials is best understood in terms...proposed. TEE SMALL group (11 falls, 8 finds) of enstatite chondrites and the closely related achondrites...schreibersite. ANDERS (1964) suggested that the enstatite chondrites could be divided into subgroups with |
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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...chondrites, Types I, II, III; Ce =enstatite chondrites; Ae =enstatite achondrites Name Formula Occurrence...s Ti0 2 Formula Accessory in Odessa iron and Allende (CellI) Rare, in ureilites Rare, in ureilites Accessory |
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| physical studies of type 3 chondrites-V: The enstatite chondrites KAREN S. WEEKS and DEREK W. G. SEARS...of 19 major, minor and trace elements in three enstatite chondrites. Based on these, and literature data...composition of enstatite chondrites, we discuss the history of the type 3 or unequilibrated enstatite chondrites...their relationship with the other enstatite chondrites. The type 3 enstatite chondrites have E chondrite lithophile...between EH and EL. We suggest that the type 3 enstatite chondrites are EH chondrites which have suffered |
 | | Book |
| 2. Lunar geology. 3. Planets — Surfaces. 4. Meteorite craters. I. Title. QB501.K56 550'.999 75-45357...Olivine-hypersthene and Olivine-bronzite chondrites Enstatite Chondrites Origin of Chondrules Achondrites IRON...at Mecca. This stone is widely reputed to be a meteorite and even thought to be the oldest preserved fragment...Jefferson was quoted in reference to a report of a meteorite fall; “. . .It may be very difficult to explain...of modes of meteorite origin, and possible genetic relations between different meteorite types. More |
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| Brltaln Amoeboid olivine aggregates in the Allende meteorite LAWRENCE GROSMAN Department of the Geophysical...predominantly of olivine make up -2% of the Allende meteorite by volume. Many of the aggregates are constructed...discrete classes of textural units in a meteorite such as Allende may expose a wealth of information about...available about the high-temperature condensates in Allende (FUCHS. 1969. 1971; CLARKE et al.. 1970; GROSSMAN...mineralogical study of a class of aggregates in Allende which appears to have stopped reacting with the |
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| carbonaceous chondrites [Orgueil (Cl), Murchison (C2) and Allende (C3)] and seven olivinebronzite chondrites (four...(Brownfield, Grady and Clovis) from American Meteorite Laboratory have been coated with organic resin...the surface material by iron lile. Individual meteorite fragments were pulverized with an agate mortar...mortar and a boron-carbide mortar. The specimens of Allende were received as powder. Prior to our receipt,...duplicate analyses were run for Orgueil, Murchison and Allende. It is seen from Table 2 that the relative abundances |
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| bronzite, 13 hype&hen%, 1 carbonaceous and 1 enstatite chondrite, and 2 achon~ites). The measured Alz8...of the grdaotic cosmic r&y intensity along the meteorite orbit due to sol&r magnetic activity. The predictions...estimation of the aphelion of the orbit of the meteorite. The great majority of the derived aphelia lie...AP production rates for different classes of meteorite. The study of meteorites whose exposure ages,...1971b). The interpretation of AP activity in meteorite samples is complicated by the variation of its |
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| and the Allende meteorite fell in Mexico, CV3 chondrites have played a major role in meteorite studies...more primitive than other chondrites, and because Allende contains numerous large, seemingly pristine and...carbonaceous chondrite fall, Allende quickly became the most widely studied meteorite, a title it still holds...holds today. Initially, studies of CAIs from Allende appeared to validate the recently developed equilibrium...metallic Fe,Ni and magnetite. McSween suggested that Allende, an oxidized CV3 chondrite, had experienced mild |
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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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| (ICP-MS) was successfully applied to bulk samples of Allende, Jilin, Modoc, Saint-Sdverin and Atlanta for the...and actinoids in chondritic meteorites. For the Allende reference sample issued by the Smithsonian Institution...features are comqon for group 11 inclusions in Allende, suggesting that the abundances of refractoxy lithophiles...meteorites determined by ICP-MS. At first, the Allende reference sample from the Smithsonian Institution...groups of chondritic meteorites (ordinary and enstatite chondrites). Based on these data, detailed abundances |
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| exception of a CV4 cholidritc, of which only one meteorite is known, representatives of all known petrologic...concentrations in the Allende ability of well analyzed standard samples. Also, the results of meteorite determined...IO devrohons ,!!,,,rfrn loo Fig. 1. The Allende meteorite: a comparison of present data with literature...Murray of 20 trace Murchison CM2 CM2 elements Allende CM2 cv2 cv3 141 121 140 117 129 Ga 8...determined by analyzing an unspiked sample of each meteorite. The measured ratios 2”‘Pb:2DhPb and “‘Ph ‘nhPb |
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| Britain ~alci~~l~inurn-Rich inclusions in the Allende meteorite : evidence for a liquid origin MILTON BLANDER*and...calcium-aluminum-rich inclusions (CAI) in the Allende meteorite. They can be classified into four types-hibonite-bearing...were probably solid originally, and that Allende meteorite appear to be high-temperature conliquids (and...processes. Prohere a detailed study of six CA1 from Allende, which posed mechanisms include secondary reheating...BLANDER(1973) showed Observations of CA1 in the Allende chondrite (FUCHS, 1969, 1971; MARVIN et al., 1970; |
