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| com/locate/gca Regolith history of the aubritic meteorite parent body revealed by neutron capture effects...accepted in revised form 13 April 2006 Abstract Enstatite achondrites (aubrites) when compared to other...dark (shocked) grains and in matrix materials of Pesyanoe, in three different fragments from Pena Blanca...parent body. The results from phases components of Pesyanoe confirm earlier reported evidence for regolith...aubrites. The inferred neutron fluences for six Pesyanoe separates vary between (2.13 and 2.82) · 1016 |
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| retention of primordial noble gases in the Pesyanoe meteorite* R. K. DIZFRESSE l... I. 1 XTRO1)CC:TIOS ~I’RsY.ixoE is a stone meteorite of debatable classification (most recently classed...DUFRESNEand EDWARDANDERS STAUFFER (1960), shows that Pesyanoe is not a freak, for other meteorites have been...for possible candidates in Pesyanoe. Previous examinations of the meteorite by KUPLETSKY and OSTROVSKY...present at all. The major fraction of the meteorite is enstatite. KUPLETSKY and OSTROVSKY report also small |
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| Search for solar-type nitrogen in the gas-rich Pesyanoe meteorite s. v. S. MURTY* AND K. MARTI University...two grain-size fractions of the gas-rich meteorite Pesyanoe. Cosmic-ray-produced "N, may be present in...uniform signatures of indigenous nitrogen in enstatite meteorites. There is no evidence for the presence...other solar system sources, are required. The meteorite Pesyanoe is known to contain solartype gases (Gerling...solar wind N in the dark portion of the enstatite achondrite Pesyanoe. The time of solar wind loading is not |
 | Lorenzetti, S., Eugster, O., Busemann, H., Marti, K., Burbine, T.H., McCoy, T. (2003) History and origin of aubrites. Geochimica et Cosmochimica Acta, 67 (3) 557-571 doi:10.1016/s0016-7037(02)01085-2 | Journal (article/letter/editorial) |
| were observed in stepped-heating studies of the enstatite chondrite Abee (Wacker, 1982). The cosmic ray...age of Norton County, the first measured stony meteorite (Begemann et al., 1957), yields the longest currently...currently known exposure time of a stone meteorite. Gaffey et al. (1992) suggested a link between aubrites...and Anders (1981) found that exposure ages of enstatite meteorites show a trend, E4 ⬍ E6 ⬍ aubrites, while...occurrence of SW-containing meteorites among the enstatite achondrites is a major reason for a detailed examination |
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| POSSIBLE SOLAR PRIMORDIAL HYDROGEN IN THE PESYANOE METEORITE Harry C. LORD III * Jet Propulsion Laboratory...temperatures, T < 7OO”C,were detected in the Pesyanoe meteorite by gas chromatographic analysis. The hydrogen...minerals, and grain sizes in the Khor Temiki meteorite, an aubrite. They discovered that upon etching...conducted. An 87.2 mg sample of the rare-gas-rich Pesyanoe meteorite (an aubrite) was heated, in vacuum, in 100”...Both hydrogen and helium were detected in the Pesyanoe sample. The gas release results are shown in fig |
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| very high degree of reduction (the enstatite chondrites and enstatite achondrites). the initial part of...different meteorite phases. Differences in element distribution between different meteorite types are...a high degree of reduction, the enstatite chondrites and the enstatite achondritee. Turning to the lithophile...found in the enstatite chondrites, and osbornite in the enstatite chondrites and the enstatite achondrites;...record the presence of MgS in the Pesyanoe meteorite, an enstatite achondrite. This phase was identified |
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| components in clasts and separates of the Abee meteorite J o h n F. W a c k e r 1 and Kurt Marti 2 I Department...t i o n regarding the origin a n d history of enstatite meteorites a n d of their p a r e n t bodies....o o n [ 1]. The distinct elemental ratios in enstatite meteorites [2] have suggested to us a possible... The Abee E4 chondrite is the largest of the enstatite chondrites a n d displays a highly brecciated...i o n of n o b l e gas c o m p o n e n t s in enstatite chondrites a n d o n their p a r e n t body. We |
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| Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon K. J. MATHEW* and K...accepted 27 November 2002) We report new data from Pesyanoe-90,1 (dark lithology) on the isotopic signature...signature of solar wind (SW) Xe as recorded in this enstatite achondrite which represents a soil-breccia of...The low temperature (≤800°C) steps define the Pesyanoe-S xenon component, which is isotopically consistent...is <1.5‰ per amu. We also observe fractionated (Pesyanoe-F) Xe and Ar components in higher temperature |
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| PRODUCTS OF OLDHAMITE PARENTAGE IN THE NORTON COUNTY ENSTATITE ACHONDRITE Aklhlko Okada·, Klaus Kell and G.J...occur on surfaces offragments ofthe Norton County enstatite achondrite. X-ray powder analysis ofthese materials...INTRODUCTION Oldhamite is found only in enstatite chondrites and enstatite achondrites. Because of the reduced...County meteorite. DuFresne and Anders (1962) found vaterite mixed with oldhamite in the Pesyanoe enstatite...spite of many investigations of the mineralogy of enstatite meteorites, the occurrence and formation of weathering |
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| of individual enstatite crystals of the gas-rich aubrites Khor Temiki, Staroe Pesyanoe and Bustee was...aubrites investigated. Statistically in a given meteorite the proportion of crystals with implanted solar...investigate the aubrites Bustee, Khor Temiki and Staroe Pesyanoe, since these are the ones for which a rough correlation...Brecciated aubrites are composed of white to grey enstatite phenocrysts (mm to cm) dispersed in a grey matrix...matrix of smaller grain size. Small enstatite crystal fragments, some of them rounded or subrounded represent |
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| abundance pattern of 3 glassy basalts compared to Pesyanoe meteorite. 3. Results Data for eleven deep-sea tholeiites...gases in three glassy pillow samples and in Pesyanoe meteorite, a gas-rich achondrite having some of the...[12] found that He, Ne and Ar solubilities in enstatite melts follow Henry's Law, and that the solubility...plot on a line with air, sea water and Kirsten's enstatite in equilibrium with air, further evidence that... 4. Kr/Xe vs. 36Ar/Kr for various materials. Meteorite data are for primordial gases as taken from [7] |
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| The following minerals were found and andyeed: enstatite, pigeonite, oligoclase, kamacite, t~roilite.oldhamite...and the presencteof sinoite indicate that the meteorite was formed under strongly reducing conditions...Chemical-mineralogical relationships between enstatite achondrites and enstatite chondrites are discussed. The results...results suggest that enstatite achondrites may have originated via remelting of enstatite chondrite type stones...conditions. However, among the various stone meteorite classes are two which were formed in an even higher |
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| mineral, using The following minerals were found: enstatite, forsterite, electron microprobe techniques. metallic...time and ferroln~gnesian al&bandite. when this meteorite was formed the environment w-as strongly reducing...stones fell, among t.hem the largest known stone meteorite and largest observed fall, weighing more than...BECK and LA PAZ published a description of this meteorite, a microscopical investigation of its constituents...described the meteorite as consisting of essentially enstatite crystals in a ground mass of enstatite and olivine |
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| Possible solar primordial hydrogen in the Pesyanoe meteorite 155 309 117 332 Macfarlane, D.J., W.I.Ridley...K.Gibson Jr., K.Keil, Nitrogen abundances in enstatite chondrites Moore, W.S., Oceanic concentrations |
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| tektites, photographs, a: 864-855 Ablation rate iron meteorite “Thule”, 25: 98 Absolute abundance of the chromium...Bruderheim meteorite, 26: 6132 aubrite, Bishopville, 29: 1085-1099 cosmic-ray, Bruderheim meteorite, 26: 662...relationships among meteorites, 24: 187 Ages enstatite chondrites, 20: 36 fission track, australites...Also, Bogou, other meteorites, 29: 1327 Alabama meteorite, Felix, carbonaceous chondrite, 24: 70-82 pelecypod...Alabandite, in Abeo stony meteorite, X-ray diffraction pattern, 21: 133 in enstatite chondrites, 20: 29 iron |
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| seven bronzite and hypersthene chondrites, three enstatite chondrites and two carbonaceous chondrites. On...nuclear events preceding the formation of the meteorite parent bodies (KATCOFF et al., 1951; SUESS and...of the meteorites. EXPERIMENTAL Meteorites The meteorite samples used in this work were obtained on a gift...supernova outbursts), and the cooling of the meteorite parent bodies to low enough temperatures to allow...the following institutions. ~01~~~. ~4meri~an Meteorite Museum, Sedona, Srizona. Brzcderheim, (B137), |
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| in the Pesyanoe achondrite (Marti, 1969). Thus, the abundance pattern of noble gases in Pesyanoe are indicated...gases in approximately the same proportions as Pesyanoe (Marti, 1969), but the bulk grain fraction of...noted earlier by Eberhardt et al. (1972). Most meteorite samples seem to contain mixtures of these three...carbonaceous chondrite (e) and the Fayetteville meteorite (e). References are in text. 123 noble gases...Kainsaz and Lance (Alaerts et ai., 1979a), the enstatite chondrite Abee (Srinivasan et al , 1977) and the |
 | Bunch, T.E., Chang, S., Frick, U., Neil, J., Moreland, G. (1979) Carbonaceous chondrites—I. Characterization and significance of carbonaceous chondrite (CM) xenoliths in the Jodzie howardite. Geochimica et Cosmochimica Acta, 43 (11) 1727-1742 doi:10.1016/0016-7037(79)90021-8 | Journal (article/letter/editorial) |
| sulfides, and rare NiFe metal or olivine with minor enstatite and sulfides. Interstitial material within chondrules...(green). Aggregates consist mostly of forsterite, enstatite or rarely Ca-rich pyroxene, spinach, NiFe metal...analysis. Inclusion-free areas in the Murray meteorite were also analyzed for comparison. Table 3 lists...the Jodzie point. The symbols signify various meteorite t pes as classified by WASON (1974):*, Ci; R,...E; 0, AUB. Lines connect analyses of the same meteorite. 1734 T. E. BUNCH etal. oM/E= 28.0061 1M/E= |
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| the stony meteorites, but in the highly reduced enstatite chondrites, it is largely Gmelln Handbook Mn Main...for ordinary chondrites; 4000 [2, p. 44] for enstatite chondrites; 2200 [2, p. 44] for achendrite (Norton...range and mean of Mn content in individual stone meteorite classes, refer also to [46]. Gmelin Handbock Mn...average weighted Mn content in individual stone meteorite classes (accompanied by a discussion of the results...mean Mn content for the individual parts of a meteorite is given as 300 ppm for the pure meta! (nickel-iron) |
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| gas-rich meteorite was discovered by GERLING and LEVST~II(1956). It was the Russian meteorite, Staroe...Staroe Pesyanoe. This meteorite is described in the literature as a brecciated enstatite achondrite. Shortly...large quantities of primordial rare gases. This meteorite, Kapoeta, was of a more oxidized type listed as...(unpublished) that another chondrite, the Fayetteville meteorite? also belongs to the class of gas-rich meteorites...order of magnitude more He and Ne than any other meteorite. The dark appearance of its gas-containing parts |
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| troilite separates of the Cape York III A iron meteorite. High resolution (20 step release) nitrogen isotopic...We discuss possible genetic links between iron meteorite groups based on nitrogen isotopic signatures in...understanding 6 15N variations among various meteorite groups. Replicate analyses of some meteorites...makes nitrogen a good tool to investigate if the meteorite parent body formed in a magmatic or nonmagmatic...CLAYTON ( 1993) found that the two major iron meteorite groups I AB and III AB which comprise 68% of all |
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| of nitrogen to solar type rare gases in this meteorite is higher than those in lunar samples. We suggest...deduced that the nitrogen in the gas-rich Pesyanoe meteorite could be isotopicaIly as heavy as the heaviest...it as a type H 3 . 7 / H 3 . 9 breccia. This meteorite is very rich in solar gases [11]. It was expected...are generally poor in nitrogen compared with enstatite or carbonaceous chondrites [6]. Thus, this chondrite...value calculated from literature data on this meteorite [11] is 9.7 × 10 8 cm 3 S T P / g , while our |
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| preserved on heat-treating or forging of specific meteorite specimens, so in most cases recognition of altered...ablation and corrosion crust is different when the meteorite has been reheated by man (Rasgata specimens of...meteorites (Bacubirito). Preservation on an iron meteorite of the ...heating is the best guarantee that the meteorite was never maltreated. On an older iron the corrosion products...of diopside or Cr-diopside (Fe = 1.9 - 3.7%), enstatite (Fs = 4.0 - 8.1 %), forsterite (Fa = 1 - 8%), |
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| represents solar wind trapped on the surface of the meteorite parent body after accretion (SUESS et al., 1964;...small fraction of the total planetary gas in a meteorite (JEFFERY and ANDERS, 1970), it is easy to synthesize...K-Ca glasses (MULFINGIER and SCHOLZE,1962), and enstatite (KIRSTEN, 1968). The data for melts are shown...(450%) is 10” times greater than value for an enstatite melt at 1773’K. See text for references. The...variation of this ratio among meteorites of different meteorite classes has been one of the puzzling features |
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| rn~~eti~, 10.7 m.y., is higher than that of the bulk meteorite, 4.5 m.y., which implies substantial loss of cosmogtmic...study of separated minerals from a primative meteorite might yield further clues oonoerning planetary...having formed during the aqueous stage of the meteorite parent body (DUFRESNEand ANDERS,1962; ANDERS,...order to dissolve the silicate, we treated the meteorite powder with 50 % NaOH at 6060%, using a magnetic...I I Fig. 1. Orgueil silicate, like the bulk meteorite, has typical planetary noble-gas pattern, with |
