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| near the surface of some chondrules in LL3.0 Semarkona, and silica-rich igneous rims around many type-I...grains derived from disrupted type-IA chondrules. Semarkona chondrule mesostases that show increased concentrations...(FeO-rich porphyritic olivine—PO) chondrules in Semarkona LL3.0 and found that most phenocrysts exhibit...Meteoritical Society, 2018. 2 A. E. Rubin Semarkona, and silica-rich igneous rims around many type-I...ANALYTICAL PROCEDURES Two thin sections of LL3.0 Semarkona (USNM 1805-3 and AMNH 4128-2) were examined microscopically |
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| 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 |
 | Zhang, Ai-Cheng, Itoh, Shoichi, Sakamoto, Naoya, Wang, Ru-Cheng, Yurimoto, Hisayoshi (2014) Origins of Al-rich chondrules: Clues from a compound Al-rich chondrule in the Dar al Gani 978 carbonaceous chondrite. Geochimica et Cosmochimica Acta, 130. 78-92 doi:10.1016/j.gca.2013.12.026 | Journal (article/letter/editorial) |
| aczhang@nju.edu.cn (A.-C. Zhang). 1 Present address: Division of Earth and Planetary Sciences, Kyoto University...distributed in mesostasis. protoenstatite into clinoenstatite (Yasuda et al., 1983). The most important characteristics...transformation from high-temperature protoenstatite into clinoenstatite. The mesostasis in the mantle consists mainly...grains in the core and mantle of the SARC are clinoenstatite that transformed from high-temperature protoenstatite...cordierite and aluminous orthoenstatite in the allende meteorite. Am. Mineral. 54, 1645–1653. Ganguly J. and Tazzoli |
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| increasing metamorphic grade of a given chemical meteorite type, FeO/MgO ratios in olivine and pyroxene increase;...Concord 3.2 3.4 3.6 3.8 4 5 6 LL chondrites Semarkona Bishunpur Chainpur Parnallee LAR 06674,4 Hamlet... 1180-3; Lost City, 4848-3; Guarena, 1469-3; Semarkona 1805-18; Bishunpur 2359-1; Chainpur, 1251-16;...Univ. of New Mexico: Qingzhen, 636. Antarctic meteorite sources: National Institute of Polar Research:...LL chondrites. (a) A porphyritic type IAB in Semarkona (LL3.0). (b) A porphyritic type IAB in Bishunpur |
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| that show evidence of aqueous alteration (e.g., Semarkona; Alexander et al. 1989a), as well as thermal metamorphism...et al. 1980; Grossman and Brearley 2005). This meteorite is a freshly recovered rock (“fall”), which contains...estimates of the metamorphic history of this meteorite. Kurat (1969) suggested that Tieschitz exhibits...in the metamorphic evolution of this complex meteorite. These observations provide compelling evidence...matrix by EDS and/or SAED. Two low-Ca pyroxene (clinoenstatite, En86–98, Fig. 11) grains were found in the |
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| and 11 B=10 B variations in chondrules from the Semarkona unequilibrated chondrite M. Chaussidon a,Ł , F...Three excentroradial pyroxene chondrules from the Semarkona unequilibrated chondrite were analysed by ion...Keywords: lithium; boron; isotopes; chondrules; Semarkona Meteorite; cosmochemistry 1. Introduction The large...11 B=10 B ratios of three chondrules from the Semarkona LL3 unequilibrated chondrite are reported in this...diameter) pyroxene excentroradial chondrules from the Semarkona LL3.0 unequilibrated chondrite were extensively |
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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. ~~ ~ |
 | JOSWIAK, David J., BROWNLEE, Donald E., MATRAJT, Graciela, WESTPHAL, Andrew J., SNEAD, Christopher J., GAINSFORTH, Zack (2012) Comprehensive examination of large mineral and rock fragments in Stardust tracks: Mineralogy, analogous extraterrestrial materials, and source regions. Meteoritics & Planetary Science, 47 (4) 471-524 doi:10.1111/j.1945-5100.2012.01337.x | Journal (article/letter/editorial) |
| 8 nm lattice fringes corresponding to (100) clinoenstatite and orthoenstatite atomic planes, respectively...FeKa edge. Cu peak is a system peak. CEn = clinoenstatite, OEn = orthoenstatite. we could not precisely...orthoenstatite and 0.9 nm clinoenstatite lamellae (Fig. 4c). Domains of pure clinoenstatite were also observed...consistent with the low temperature polymorph clinoenstatite. Ko-augite is in intimate contact between enstatite...inset is taken from low-Ca pyroxene and matches clinoenstatite. c) EDX spectrum of Ko-augite and minor zone |
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| 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...anthophyllite augite barroisite burnettite clinoenstatite davisite diopside donpeacorite Sc-fassaite...chrysotile chukanovite cinnabar clinochlore clinoenstatite clintonite cobaltite coesite cohenite collinsite |
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| oxygen fugacity, and water/rock ratio, on the meteorite parent bodies. Experimental research can provide...hydrous phases in the carbonaceous chondrites. Meteorite Hydrous phase Composition References CI Serpentine...size. Enstatite has two polymorphs, OEN and clinoenstatite (CEN). Enstatite in most chondrites occurs...was performed at the Instrumentation Analysis Division in the Center for Supports to Research and Education...brucite-like sheets newly found in the Murchison (C2) meteorite. Proceedings of the Fifth Symposium on Antarctic |
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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 fields. a l a n e . r u b i n is a meteorite researcher who recently retired from the University |
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| water to a greater degree than the rest of the meteorite. The overall degree of hydration in CR chondrites...001 Total= 3265.0 lOraham&&(1985) 2-Antarctic Meteorite Newsletter(1989a) 3.Yanai and Kojima (1987) CKojima...CKojima and Yanai (1988) 5-Antarctic Meteorite Newsletter(1989b) 6-Bischoff a& (1991,1993a) Abbreviationsfor...in Antarctica. As is the case for some other meteorite groups, expeditions to Antarctica have brought...most PO and POP chondrules, pyroxene (mainly clinoenstatite) is concentrated on the margins of the cores |
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| alteration. The extent of alteration varies from meteorite to meteorite. Some rocks (e.g., Murchison; QUE 97990;...Samples, petrographic types, and weathering grades Meteorite Section number Fall or find Petrographic type... Alteration of CM chondrites 91600, a CM-related meteorite that previous studies had suggested had been metamorphosed...rectangular blocks. Standards included the Allende meteorite, the USGS standards granite G-2 and basalt BHVO-1...phenocrysts in the chondrules appear unaffected. The meteorite contains 1–2 vol % of 10–30-lm-size Ca carbonate |
 | Joswiak, D. J., Brownlee, D. E., Matrajt, G., Westphal, A. J., Snead, C. J. (2010) Kosmochloric Ca-rich pyroxenes and FeO-rich olivines (Kool grains) and associated phases in Stardust tracks and chondritic porous interplanetary dust particles: Possible precursors to FeO-rich type II chondrules in ordinary chondrites. Meteoritics & Planetary Science, 44 (10) 1561-1588 doi:10.1111/j.1945-5100.2009.tb01192.x | Journal (article/letter/editorial) |
| axis pattern [-11-2] is consistent with JCPDS clinoenstatite 19–769 (Bayliss et al. 1980). b) Microtome...11 Type II FeO-rich chondrules from the Semarkona meteorite (Jones 1990). The measured bulk composition...primary grains (Huss et al. 2006). Matrix in Semarkona, for instance, a type LL3.0 chondrite, is dominated...elemental and potassium isotopic compositions of Semarkona chondrules. Meteoritics & Planetary Science 40:541–556...1971. The petrology of chondrules in the Sharps meteorite. Contributions to Mineralogy and Petrology 31:2010– |
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| 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 |
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| 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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| grains (Hoppe et al., 1995) from the Murchison meteorite are compared to astronomical measurements of the...bulk samples of SiC extracted from the Murchison meteorite. Isotopic ratios are relative to the reference...result of isotopic equilibration, either on the meteorite parent body or in the laboratory. Apparently,...circumstellar silicon carbide grains from the Murchison meteorite. Meteoritics 30, 679–693. Amari S., Lewis R. S...interstellar graphite grains from the Murchison meteorite indicate a massive star origin. Astrophys. J. |
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| range of topics covered, including asteroid and meteorite classification, chemical and physical properties...Floor, Ansari Road, Daryaganj, Delhi –110002, India 79 Anson Road, #06-04/06, Singapore 079906 Cambridge...Minerals Terrestrial Weathering Meteorite Classification Meteors Meteorite Densities Magnetic Field Radioactive...How well can we link these bodies to particular meteorite groups? What can be learned from returned samples...in the sky, it will be called an asteroid. A meteorite is a natural fragment of any celestial body that |
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| Water-Rich Small Bodies 390 6.5 Primitive Asteroid-Meteorite Matches 394 6.6 Implications for Exploration of...same rate as older craters erode away (due to meteorite and micrometeorite bombardment), at least for...found that the best match for 433 Eros is an OC meteorite that has been altered at the surface of the asteroid...do not go longward of 0.9 mm, and a suggested meteorite analog cannot be identified beyond those generally...existence of polymict breccias in the Earthly meteorite collections. Some regions in the southern hemisphere |
| | Book |
| grains (Hoppe et al., 1995) from the Murchison meteorite are compared to astronomical measurements of the...bulk samples of SiC extracted from the Murchison meteorite. Isotopic ratios are relative to the reference...result of isotopic equilibration, either on the meteorite parent body or in the laboratory. Apparently,...circumstellar silicon carbide grains from the Murchison meteorite. Meteoritics 30, 679 –693. Amari S., Lewis R....interstellar graphite grains from the Murchison meteorite indicate a massive star origin. Astrophys. J. |
