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| Petrography of isotopically-dated clasts in the Kapoeta howardite and petrologic constraints on the evolution...basaltic rock fragments separated from the howardite Kapoeta. Clasts C and p have been dated at -4.55 AE and...melt. They thus provide good evidence that the Kapoeta parent body produced basaltic magmas shortly after...âyoungâ magmatism on the Kapoeta parent body. Kapoeta is a âregolithâ meteorite, and mineral-chemical and... The Fe0 and MnO contents of all pyroxenes in Kapoeta fall near a line with FeO/MnO - 35, suggesting |
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| 40-argon 39 chronology of lithic clasts from the Kapoeta howarditet R. S. RAJAN,~ J. C. HUNEKE,S. P. SMITHand...fourth basaltic clast (p) from the Kapoeta achondritic meteorite. The Ar data show that three of the...studies suggests the period of volcanism on the Kapoeta parent planet was restricted to the first -0.2...bulk meteorite. The clasts spent essentially all of the time prior to the formation of Kapoeta at depths...achondrite Kapoeta is to investigate the early magmatic and metamorphic histories on the Kapoeta parent body |
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| with the Mossbauer experiments reported for the Kapoeta howardite and look for systematics in the Mossbauer...technique is still underutilized in the field of meteorite research. From our studies on several chondrites...gain information about the category of a given meteorite. Eucrites and howardites belong to the same category...present. The pyroxene in the eucrites is mostly pigeonite which has a monoclinic crystal structure (clinopyroxene)... The Meteorites Under Study The Piplia Kalan meteorite fell on 1996 June 20 at 20:15 h IST at Piplia |
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| University Corvallis, OR 97331 Paul P. Sipiera Meteorite Research Group William Rainey Harper College Palatine...from olivine-normative to quartz-normative. Like Kapoeta, it contains pyroxene grains that range up to highly...those occurring in diogenites, Monticello and Kapoeta are exceptions to the simple two-component mixing...Jones, discovered the Monticello meteorite on 29 May 1982. The meteorite was lying on the shoreline of Lake...Among reasonable explanations it is possible the meteorite fell into ~hallow water and the rapid quench caused |
 | Macdougall, Douglas J., Lal, Devendra, Wilkening, Laurel L., Bhat, Suman G., Liang, Samuel S., Arrhenius, Gustaf, Tamhane, Arvind S. (1971) Techniques for the study of fossil tracks in extraterrestrial and terrestrial samples. I: Methods of high contrast and high resolution study. GEOCHEMICAL JOURNAL, 5 (2) 95-112 doi:10.2343/geochemj.5.95 | Journal (article/letter/editorial) |
| tracks, and the availability of a large number of meteorite and documented lunar samples. The latter exhibit...(b) Silveredtracks in a pyroxene from the Kapoeta meteorite. Track density is 5 X 106cm2. (c) Optically...tracks 15 LENGTH showing well-etched in the meteorite, 20 (MICRONS) the length tracks distribution...lengths of neutron induced fission tracks in the meteorite Angra dos Reis. Two types of tracks were selected...D. MACDOUGALL Track No. i) Tip 1 ii) Tip 1 Pigeonite, Tip Tip Moore Length (microns) 2 2 County |
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| parent rocks. Introduction As the importance of meteorite impacts as a mechanism producing lunar land forms...plagioclase (An 50-70) 33%-48%, clinopyroxene (augite ± pigeonite) 17%â34%, and opaques (ilmenite and/or magnetite)...the Lake Wilson-Mt. Davies region in northwest South Australia; (2) a group with high Ca/Al ratio centered...centered around Charlotte Waters on the South AustraliaâNorthern Territory border and extending into southwest...low Si from Pindera in New South Wales (australites from elsewhere in New South Wales analyzed by other |
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| Meteoritical Society, 1998. Printed in USA. The Kapoeta howardite: Implications for the regolith evolution...thin sections, made from the hand sample, of the Kapoeta howardite and its many diverse lithic clasts were...measurements). Petrographic studies reveal that Kapoeta consists of a fine-grained matrix made mostly of...two regolith generations are represented in the Kapoeta sample we studied. The clast assemblage suggests...clast D is a true regolith breccia within the Kapoeta howardite (breccia-within-breccia), while clast |
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| investigation of xenolithic carbonaceous clasts from the kapoeta howardite Nan Liu, Ryan C. Ogliore, Lionel G. Vacher...investigation of xenolithic carbonaceous clasts from the kapoeta howardite, Geochimica et Cosmochimica Acta (2020)...Investigation of Xenolithic Carbonaceous Clasts from the Kapoeta Howardite Nan Liu1*, Ryan C. Ogliore1, Lionel G...carbonaceous clasts (C-clasts) identified in the Kapoeta howardite based on highresolution NanoSIMS hydrogen...the most abundant type of achondrites in our meteorite collection (Mittlefehldt 1997). Among HED meteorites |
 | Lunning, Nicole G., Welten, Kees C., McSween, Harry Y., Caffee, Marc W., Beck, Andrew W. (2016) Grosvenor Mountains 95 howardite pairing group: Insights into the surface regolith of asteroid 4 Vesta. Meteoritics & Planetary Science, 51 (1) 167-194 doi:10.1111/maps.12580 | Journal (article/letter/editorial) |
| cm, a preatmospheric size comparable to that of Kapoeta, the largest known regolithic howardite. The paired...features of the groups and subgroups of the HED meteorite clan are outlined in Table 1. In this study, we...evaluate which stones may have been part of a single meteorite fall that broke apart during atmospheric transit...of the howardite, eucrite, and diogenite (HED) meteorite clan. Multiple lithologies have previously been...orthopyroxenitic diogenites: Greater abundances of pigeonite and clinopyroxene One composition within En33-45 |
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| 9-13 6-38 3-13 0- 4 0- 2 Shergotty meteorite e Kapoeta meteorite a 50.4 0.8 6.9 19.1 9.3 10.1 1.4 0... but shergottite pyroxene is all monoclinic (pigeonite and augite), whereas the shergottite norms and...equilibrium conditions). Furthermore, the Shergotty meteorite contains 2% titanomagnetite with TiO2/Fe304 =...attention to another meteorite group, the howardites and, specifically, the meteorite Kapoeta that is similar...regolith fines. Howardites are apparently lithified meteorite parent-body regolith and consist of a mechanical |
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| equilibrium distribution in silicate phases; meteorite weathering; fusion crust Received: 14 January...majority of which consist of olivine and uninverted pigeonite, i.e., a clinopyroxene subgroup with 5â25% of...The authors studied two falls: Novo Urei (this meteorite gave the name âureilitesâ for the group of primitive...82506, Elephant Moraine (EET) 87517, EET 87511, Meteorite Hills (MET) A78008, and ALHA77257. The room temperature...mm/s, respectively, while those for pyroxene (pigeonite) are in the ranges ~1.12â1.18 mm/s and ~1.88â2 |
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| the surface, so rapidly that portions of the meteorite and the ground which were in contact were vaporized...people wondered about what would happen if a large meteorite fell to the ground, but they were limited by the...meteorites and the corollary that the size of the meteorite was quite small relative to the crater it could...an equal mass of TNT. The kinetic energy of a meteorite changes with the square of the velocity and hence...far more probable that the angle of impact of a meteorite with earth or moon is low rather than high. Previously |
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| Breach, Science Publishers, Inc. 44 Park Avenue South New York, N.Y. 10016 , Editorial office for the...Kamacite Taenite Troilite Olivine Orthopyroxene* Pigeonite «-(Fe, Ni) y-(Fe, Ni) FeS (Mg, Fe)2Si04 (Mg,...minerals are quartz and aluminosilicates; the common meteorite minerals are anhydrous, whereas hydrated minerals...(26) Diopside, olivine Hypersthene, plagioclase Pigeonite, plagioclase Stony-irons Pallasites (2) Siderophyre...actual extraterrestrial abundances; irons dominate meteorite finds, since they are resistant to weathering |
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| tektites, photographs, a: 864-855 Ablation rate iron meteorite âThuleâ, 25: 98 Absolute abundance of the chromium...and APB in nine 27. 987 Kapoeta, light andâd& structure, 27: 718-739 Kapoeta, noble gases in, 26: 665-680...Bruderheim meteorite, 26: 6132 aubrite, Bishopville, 29: 1085-1099 cosmic-ray, Bruderheim meteorite, 26: 662...plutons, Nevada and Utah, 26: 665 granites from South Africa, 29: 1115 granitio rocks, Poland, 26: 1069...Also, Bogou, other meteorites, 29: 1327 Alabama meteorite, Felix, carbonaceous chondrite, 24: 70-82 pelecypod |
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| processes have been invoked previously for other meteorite groups. Rubin (2004) studied 210 equilibrated...1 Thin sections examined in the current study Meteorite Sections ClassiïŹcation Shock stage ALH A77081...extinction indicative of shock-stage S5. The meteorite contains several ïŹne-grained metalâtroilite assemblages...low-Ca clinopyroxene (i.e., clinobronzite, not pigeonite) in this rock; this phase forms by quenching of...abundances of phases in acapulcoites and lodranites Meteorite Section Group No. of points ALH A77081 17 acapulcoite |
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| extraterrestrial materials allow us to determine how long a meteorite existed as a meter-sized object before capture...cosmic-ray exposure (CRE) ages of the different meteorite classes that originated from the asteroid belt...larger parent body. It also assumes that the meteorite did not undergo further break-up events, causing...Furthermore, after break-up from its parent body, the meteorite may have suffered additional fragmentations. In...production rates also depend on the size of the meteorite in space (the meteoroid) and the shielding depth |
 | | Report (Issue volume) |
| the planet which our ancestors called Culmen, a meteorite, known to scientists under the name of Croix dâHonneur...end of him. Woe to the mortal on whose head the meteorite falls!â (p. 141-142). Les MystĂ©res de l'Infini...photographs J. M. BOYCE PI Geologic structure of the eastern mare J. D. WASKOM 2729 basins R.A. DEHON and...SPETTEL, and 3479 Contents, Volume COMPARATIVE Meteorite 3 PLANETOLOGY Studies Trace element evidence...absorption spectra of a Ti*' fassaite from the Allende meteorite: A discussion. Amer. Mineral. 58, 955-961. Cohen |
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| 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 ïŹelds. a l a n e . r u b i n is a meteorite researcher who recently retired from the University |
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| BELSHAW: Mg isotope heterogeneity in the Allende meteorite measured by UV laser ablationâMCâICPMS and comparisons...MURRAY: Suboxic trace metal geochemistry in the eastern tropical North Pacific 1139 R. E. ZEEBE and A....phosphorus during formation of the most recent eastern Mediterranean sapropel (S1) . . . . . . . . . ...element variations resulting from inversion of pigeonite and subsolidus reequilibration in lunar ferroan...reaction on hydrothermal fluxes of major elements, eastern flank of the Juan de Fuca Ridge . . . . . . . |
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| METEORITE RESEARCH ASTROPHYSICS AND SPACE SCIENCE LIBRARY A SERIES OF BOOKS ON THE RECENT DEVELOPMENTS...Holland VOLUME 12 METEORITE RESEARCH PROCEEDINGS OF A SYMPOSIUM ON METEORITE RESEARCH HELD IN VIENNA...the publisher INTRODUCTION The Symposium 'Meteorite Research' was conceived originally at the second...need to strengthen international co-operation in meteorite research, asks that the International Atomic Energy...discussed ranged from the computer-assisted study of meteorite orbit statistics, through problems of composition |
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| the IMACNMNC, including 17 from the Allende CV3 meteorite (Ma, 2015a) and high-pressure phases such as bridgmanite...kaersutite ureyite omphacite orthopyroxene pigeonite potassic-chloro-hastingsite pyroxferroite rhodonite...perrierite perryite PGE-dominated alloys phlogopite pigeonite plagioclase plagionite platinum pleonaste portlandite...exsolution in chondrules during cooling: (1) Pigeonite and calcic pyroxene (augite) in clinoenstatite...sources plausibly responsible for the bulk of meteorite metamorphism and melting: (1) the decay of shortlived |
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| between the degree of '60-depletion in the bulk meteorite and oxidation state, since presumably the most...for several clasts and matrix samples from each meteorite. References: Batchelor and Sears (1989) Meteoritics...21, 1379. (3) Jungck (1982) Pure 22Ne in the Meteorite Orguei/: an attempt to characterize the carrier...variety of clasts; EET87509 contains rapidly cooled pigeonite vitrophyres and volcanic glasses, EET87513 contains...acquiring TL data for 2-3 matrix samples from each meteorite, and for the following clasts: EET87513, eucrite |
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| magnetite and pyrrhotite grains in the martian meteorite are of magnetotactic bacterial origin. A6 Meteoritics...exsolved augite. However, exsolution of the primary pigeonite (Wo,) has not proceeded very far: Augite lamellae...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 |
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| Radioactivity in Lunar Rocks: Implications for Meteorite Infall, Solar-Wind Flux, and Formation Conditions...is consistent with the observed occurrence of meteorite material in the soil. Many elements such as potassium...experimental error as the value obtained from meteorite lead. The apparent ages are shown in Table 2....leads used for correction are primeval lead of meteorite (7) for samples 10061 and 10084 and common lead...are plotted with Pattersonâs data (/) on stone meteorite and Oversbyâs measurement (7) of primordial lead |
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| biogeochemistry in the worldâs oceans. Sampling of NorthâSouth traverses of all of the worldâs oceans at all depths...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 Karlâs 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 |
