 | | Journal (article/letter/editorial) | | 2005 Copyright Ā© 2005 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/05 $30.00 ā«¹ .00 doi:10...University of Tennessee, Knoxville, TN 37996-1410, USA 3 Geology Department, University of Toronto, 22 Russell...fragments from the equilibrated ordinary chondrite Richardton (H5). Chondrules and milligramsized fractions...Pb-Pb isochron date of 4562.7 ā«¾ 1.7 Ma of the Richardton chondrules and chondrule fragments is resolved...cooling rate at 26 ā«¾ 13 K/million years for the Richardton parent body over the period of 4563ā 4551 my |  | Evensen, N.M., Carter, S.R., Hamilton, P.J., O'Nions, R.K., Ridley, W.I. (1979) A combined chemical-petrological study of separated chondrules from the Richardton meteorite. Earth and Planetary Science Letters, 42 (2) 223-236 doi:10.1016/0012-821x(79)90028-1 | Journal (article/letter/editorial) | | STUDY OF SEPARATED CHONDRULES FROM THE RICHARDTON METEORITE N.M. EVENSEN, S.R. CARTER, P.J. HAMILTON...chondrules have been separated from the H5 chondrite Richardton and subjected to a detailed chemical-petrologicalstudy...that Sr isotope equilibration occurredin the Richardton parent body for some 100 Ma or more after condensation...chondrule formation. 1. Introduction Among the major meteorite classes, the chondrites are the most common among...a number of chondrules from the H5 chondrite Richardton. The data presented include the first Rb-Sr isochron |  | | Journal (article/letter/editorial) | | University, 10900 Euclid Avenue, Cleveland, OH 44106, USA c Department of Earth and Planetary Sciences, University...Davis, One Shields Avenue, Davis, CA 95616-8605, USA d Research School of Earth Sciences, Australian National...chondrites, we analyzed mineral fractions from the Richardton H5 chondrite to construct an internal LuāHf isochron...ratios obtained for the nine silicates fraction of Richardton. initial ļ¬nes handground ļ¬nes coarse handground...explanation for the observed excess slopes of meteorite LuāHf isochrons (e.g., Bizzarro et al., 2003; |  | | Journal (article/letter/editorial) | | Beard&y I No. 1349 Beard&y SI eucrite Moore County grey ohondrite howardi~ chondritic howrtrdite...ation Pasamonte light frebetion C$. SC~~~~ER Sioux county No. 298 Nuevo Lar%do Name gmbinS small whole... 82.6 - 0.22 0.22 Sioux County A B 68.8 - O-20 0.29 Moore County A 795 Nuevo Laredo A R ...14.32 Al 4 10.4, - Holbrook A 12.8 f - Richardton A B 10.0 11.2 10.0 El E2 F G H I mean 3...Spectrum c of strontium - isotopes A in Moore County anchondrite. rubidium sample. At the end of this |  | SHIMODA, Gen, NAKAMURA, Noboru, KIMURA, Makoto, KANI, Tomomi, NOHDA, Susumu, YAMAMOTO, Koshi (2005) Evidence from the Rb-Sr system for 4.4 Ga alteration of chondrules in the Allende (CV3) parent body. Meteoritics & Planetary Science, 40 (7) 1059-1072 doi:10.1111/j.1945-5100.2005.tb00173.x | Journal (article/letter/editorial) | | are recorded in the CV meteorites, the Allende meteorite was investigated, since Allende is 1059 Ā© The...The Meteoritical Society, 2005. Printed in USA. 1060 G. Shimoda et al. representative of the oxidized...+ + + + + + + Mineral assemblage High-Ca Plagioclase/ pyroxene Glass Spinel + + + + + + + + + + +...while in a barred chondrule (Fig. 1b), primary plagioclase groundmass is partly replaced by nepheline and...microns. b) A barred chondrule (H-4). Groundmass plagioclase (Pl) is partly replaced by nepheline (Ne) and |  | | Journal (article/letter/editorial) | | NorthernIreland Lead-lead age of the Bondoc meteorite ROYAL R. M&SFWLL Jet Propulsion Laboratory, California...concentration of lead in a portion of the Bondoc meteorite W~JX determined by the isotopic dilution technique...0.005 ppm. Isotopic ratios of the lead in the meteorite were found to be Pb*oe/Pb204 = 20.11, Pb807/Pbso4...present U89s/Uasr ratio in this meteorite is 137.7. THE BONDOC meteorite was recovered a few years ago...Intrigued by the unique features of the Bondoc meteorite, the present writer obtained pieces of it for |  | | Journal (article/letter/editorial) | | published results for Ste. Marguerite (H4) and Richardton (H5), our data reveal that the cooling rates...1337 Ā© The Meteoritical Society, 2007. Printed in USA. 1338 A. Blinova et al. metamorphic temperatures...chondrules and phosphates from the H5 chondrite Richardton (Amelin et al. 2005). A similar study using U-Pb...intensive metamorphism than the previously dated Richardton. We present a detailed U-Pb isotopic study of...PROCEDURES Meteorite Selection For this study, we selected four H6 chondrites from the National Meteorite Collection |  | GILMOUR, J. D., WHITBY, J. A., TURNER, G., BRIDGES, J. C., HUTCHISON, R. (2000) The iodine-xenon system in clasts and chondrules from ordinary chondrites: Implications for early solar system chronology. Meteoritics & Planetary Science, 35 (3) 445-455 doi:10.1111/j.1945-5100.2000.tb01427.x | Journal (article/letter/editorial) | | 5 (2000) 0 Meteoritical Society, 2000 Printed in USA The iodine-xenon system in clasts and chondrules...Research Drive, Suite 300, Knoxville, Tennessee 37932, USA *Correspondence author's e-mail address: Jamie.Gilmour@man...solar system left large excesses of 129Xe in many meteorite samples (Reynolds, 1960). By measuring the present-day...1999), which suggests that within a particular meteorite group some correlation of the system with petrologic...high-temperature isochrons are examined, most meteorite groups do not exhibit such a correlation (Swindle |  | | Journal (article/letter/editorial) | | high-Ca pyroxene, and glass or devitriļ¬ed glass. Plagioclase is subordinate. Metal and sulļ¬des, which usually...mesostasis; ol = olivine; px = pyroxene; plag = plagioclase; RP = radiating pyroxene; RPO = radial pyroxene...mesostasis glass associated with crystals of plagioclase. Devitrified Glass Glass in Knyahinya objects...and 2ā4.7 wt% CaO. Object OZ8 is the Plagioclase Plagioclase occurring in Knyahinya and Ouzina objects...olivine, low-Ca and high-Ca pyroxene, glass, and plagioclase in wt%. KNYAHINYA-olivine Object KN1 KN1 (rim) |  | | Journal (article/letter/editorial) | | petrologic type; normative fayalite, albite and plagioclase increase through the petrologic sequence. Chondrule...Ochansk,āMa&, Se& iagoasj, Hi (Uberaba, Pultusk, Richardton, Forest City), and H6 (KernouvB, Bjelaja Zerkov...and MnO, as well as for normative olivine and plagioclase compositions. These compositional relationships...associated with Al,O, in the form of glass or plagioclase. show no statistically significant trends through...Lagoas PETROLOGIC TYPE 5 W m m I Uberaba Pultusk Richardton Forest City OLOGIC TYPE 6 &%I Kernouvh BBjelaja |  | | Journal (article/letter/editorial) | | resulting in a redistribution of elements among meteorite constituents. In these chondrites also, chondrules...performed by handpicking under a microscope after meteorite disaggregation. Two pieces (5.5 and 7.2 g in weight)...analyzed together with a sample of the whole meteorite. Aliquants of 0.5 g were used for ensuring sample...may be postulated that Ca may be present in plagioclase as well as in other Ca-rich silicates. Some major-sized...example, seems to be controlled by the amount of plagioclase present as the highest Sr levels are found in |  | Kleine, Thorsten, Touboul, Mathieu, Van Orman, James A., Bourdon, Bernard, Maden, Colin, Mezger, Klaus, Halliday, Alex N. (2008) HfāW thermochronometry: Closure temperature and constraints on the accretion and cooling history of the H chondrite parent body. Earth and Planetary Science Letters, 270 (1) 106-118 doi:10.1016/j.epsl.2008.03.013 | Journal (article/letter/editorial) | | parent asteroid. 2. Analytical methods Pieces of meteorite were cleaned with abrasive paper and with 0.05...fractions Sample Ste. Marguerite (H4) Metal Mean NM Richardton (H5) A-metal (N150 Ī¼m) Mean A-NM-1 Repl. A-NM-2...Ste. Marguerite (MNHN); Richardton-A (USNM); Richardton-B (MNHN); Richardton-C (Senckenbergmuseum Frankfurt);...183W/184W ratios for two NM fractions of the Richardton meteorite are attributed to an organic interference...affected, such that for the two NM fractions from Richardton with elevated measured 183W/184W the reported |  | Nakamura, Noboru, Misawa, Keiji, Kitamura, Masao, Masuda, Akimasa, Watanabe, Seiko, Yamamoto, Koshi (1990) Highly fractionated REE in the Hedjaz (L) chondrite: implications for nebular and planetary processes. Earth and Planetary Science Letters, 99 (3) 290-302 doi:10.1016/0012-821x(90)90117-g | Journal (article/letter/editorial) | | with the light-REE enriched, indicating that the meteorite contains components with highly fractionated REE...of coarse-grained olivine, minor pyroxene and plagioclase, and trace amounts of glass; it shows an igneous...body and was then incorporated into the Hedjaz meteorite parent body. The presence of impact-related products...H O N D R I T E whole-rock samples from the meteorite. Here, we present the results for chemical analyses...with less abundant lithic fragments. Since the meteorite is quite hard, much cautious work was required |  | | Journal (article/letter/editorial) | | unequilibrated chondrites also shows that each meteorite has been metamorphosed, with the alteration ranging...electron microprobe analyses as possible for each meteorite. Standards used were augite (Si, Tāi), olivine...is heterogeneously distributed through a given meteorite and often appears in contact with larger metallic...amoeboid). cussion). Fourth, in at least one meteorite, a significant amount of Ni occurs in sulfides...solution and deposition. This material is highly plagioclase normative and. since it is intimately associated |  | | Journal (article/letter/editorial) | | analysis of each fragment B, C, D and 2 analyses of plagioclase and pyroxene separates in order to compare their...100.0 t1.4 pyr70 26.5 113 2.68 4.3 81.2 + 14 Plagioclase le;;hin;l,;;pe;~';e' It (f) Ll -29.39 + 33 12...(between 2 and 2.6 X lO_ā mole -Pb/g), and the plagioclase separates (between 3.6 and 5.5 X lo-l2 mole 204Pb/g)...Pb component is found in the two major phases plagioclase and pyroxene. For this reason the f&gments will...purities of the separates: particularly, the plagioclase separates may contain variable amounts of phosphate |  | | Book | | METEORITICS H . H . Nininger DIRECTOR , AMERICAN METEORITE MUSEUM The University of Denver Press Science...colleges , museums , and individuals throughout North America among which should be mentioned the University...Museum , the College of the City of New York , the North Carolina State Muse um , Pennsylvania State College...RELATIONS THE PLAINVIEW METEORITE SHOWER THE KIOWA COUNTY METEORITES METEORITE CRATERS A COMPOSITE SWARM...METEORITES AND THE MOON 280 TEKTITES 297 GREAT METEORITE COLLECTIONS 309 PROPOSED NATIONAL INSTITUTE OF |  | | Book | | Professor of Chemistry and Geology Director, Nininger Meteorite Collection Arizona State University JOHN WILEY...Chemistry and Geology, Director of: the Nininger Meteorite Collection, Arizona State University, Tempe, Arizona...announced the transfer of the outstanding Nininger Meteorite Collection to Arizona State University. Throughethe...the National Science Foundation, the Nininger Meteorite Collection was established primarily for purposes...(minerals The of meteorites) relationship of and meteorite Moore (achondrites), studies to the Earth |  | | Journal (article/letter/editorial) | | University of California, Los Angeles, CA 90024, USA (Received August 4, 1981; accepted in revised form...to define chondrules. In studies that rely on meteorite thin sections, researchers have to make arbitrary...mostly in olivine and pyroxene, Al in glass or plagioclase, and V in chromite and SC and Sm may he distributed...showed that most of the oxidized Ga is in the plagioclase; Ga is probably in the feldspathic material (glass)...cannot be a glass of uniform composition of plagioclase since it would then covary with those elements |  | | Journal (article/letter/editorial) | | throughout the interior portion together with the plagioclase (Fig. 2a). Certain spinels are surrounded by... study of separated chondrules from the Richardton meteorite. Earth Planet. Sci. Lett. 42, 223ā236. Grossman...Ganapathy R. (1976) Trace elements in the Allende meteorite ā I. Coarse-grained, Ca-rich inclusions. Geochim...Davis A. M. (1977) Trace elements in the Allende meteorite ā III. Coarse-grained inclusions revisited. Geochim...(1974) Major and trace elements in the Allende meteorite. Nature 249, 333ā334. Maruyama S. and Yurimoto |  | | Book | | Planetary Sciences. He teaches chemistry and performs meteorite research, and is currently involved in creating...Chemistry and Biochemistry, University of Arkansas, USA CAMBRIDGE UNIVERSITY PRESS Cambridge, New York...sediments Potential meteorite parent bodies 2.1 Asteroids as potential meteorite parent bodies 2.2 Impact...Spectra of asteroids Distribution of asteroid and meteorite classes Texture of gas-rich regolith breccias...of hypothetical ejecta blanket Structure of a meteorite parent body Asteroids and their surfaces Fraction |  | | Book | | Planetary Sciences. He teaches chemistry and performs meteorite research, and is currently involved in creating...Chemistry and Biochemistry, University of Arkansas, USA CAMBRIDGE UNIVERSITY PRESS Cambridge, New York...sediments Potential meteorite parent bodies 2.1 Asteroids as potential meteorite parent bodies 2.2 Impact...Spectra of asteroids Distribution of asteroid and meteorite classes Texture of gas-rich regolith breccias...of hypothetical ejecta blanket Structure of a meteorite parent body Asteroids and their surfaces Fraction |  | | Book | | Netherlands. Special regulations for readers in the USA - This publication has been registered w i t h the...of parts of this publication may be made in the USA. All other copyright questions, including p h o t...Chondrite-normalized abundances of t h e REE in "North American shales composite", abbreviated NASC. (b)...in a suitable sediment or average sediment; e.g. North American shales composite, abbreviated NASC (see...element abundances in chondritic meteorites, and in North American shales composite (NASC), used for normalization |  | | Book | | resulted, their recovery, and the history of meteorite studies since the time when it was established...1.1. Thunderstones and the Origins of Modern Meteorite Research 1.2. The Early Nineteenth Century 1.3...Minerals Meteorite Falls and Associated Phenomena 2.1 Introduction 2.2. Non-Crater-Forming Meteorite Falls...Falls 2.2.1. The Phenomena of Meteorite Falls 2.2.2. The Scatter Ellipse 2.2.3. Morphology and the Fusion...2.2.4. Meteorite Recovery 2.2.5. Terrestrial Ages of Meteorite Finds 2.3. Explosive Meteorite Craters |  | | Book | | the teleconnections in climate change between the NorthĀ¬ ern and the Southern Hemispheres, an essential...for thermal metamorphism and differentiation of meteorite parent bodies in the early solar system, that...Research Division, UCSD 0220, La Jolla, CA 92093, USA e-mail: dlal@ucsd.edu Continuing improvements in...routine! In the case of meteorites, every new meteorite was analyzed when the sample became available...of a deep-seated rock by glacier action, or a meteorite impact, or exposing a previously shielded rock |  | | Journal (article/letter/editorial) | | abundances and isotopic studies in the chondrites Richardton and Farmington 46(3): 311-322 0004 Aekerman...of eucrites Stannern and Nuevo Laredo in lunar-meteorite comparative studies 9(4): 341-344 0014 Ahrens...Miehard-Vitrae, A. Age and significance of the North Pyrenean metamorphism 40(3): 327-332 0031 Albee...Distribution de la matiere organique dans la meteorite d'Orgueil par microscopic en fluorescence 19(4):...mantled gneiss domes, Albion range, southern Idaho, USA 0091 Armstrong, R. L.; Jager, E.; and Eberhardt, |
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