 | | Journal (article/letter/editorial) | | Letters 144 (1996) 359-367 Thermal history of Acapulco and ALHAS 126 1 acapulcoites constrained by Fe2+...states of four orthopyroxene crystals from the Acapulco meteorite and two from the Antarctic ALHA acapulcoite...of cation ordering were 49028 and 46543°C for Acapulco and ALHA81261, respectively. Kinetic analysis...closure temperatures, of _ 0.17 and _ O.OS”C/day for Acapulco and ALHA respectively, slightly slower than that...the FRO9001 1 lodranite to the Landes IAB iron meteorite reflects decreasing cooling rates. Silicates enclosed |  | | Journal (article/letter/editorial) | | Chemical composition and origin of the Acapulco meteorite J. ZIPFEL, I.. H. PALME,1,2 A. K. KENNEDY...whole-rock and individual mineral samples from the Acapulco meteorite are reported. Results of instrumental neutron...an upper limit of about 20% partial melting of Acapulco at around 1200°C. During melting and closed-system...chromite, sulfide, and phosphates was established. Acapulco phosphates are of igneous origin. Most of them...oxidation of metal. The uniform K contents of bulk Acapulco samples and the comparatively high contents of |  | | Journal (article/letter/editorial) | | S0016-7037(97) 00167-1 The cooling history of the Acapulco meteorite as recorded by the 244pu and 40Ar-39Ar chronometers...TRIELOFF,2 and ELMAR K. JESSBERGER2;I JLaboratoire de Min6ralogie du Mus6um et Institut d'Astrophysique...evolution in the low temperature regime of the Acapulco meteorite over a time interval of ~ 110 Ma. High resolution...temperature ( - 1300 K), and the U/Pb-Pb datum of Acapulco phosphates (G6pel et al., 1992), outline an early...early thermochronological history of Acapulco, that is more detailed than obtained by earlier attempts |  | Li, Shijie, Yin, Qing-Zhu, Bao, Huiming, Sanborn, Matthew E., Irving, Anthony, Ziegler, Karen, Agee, Carl, Marti, Kurt, Miao, Bingkui, Li, Xiongyao, Li, Yang, Wang, Shijie (2018) Evidence for a multilayered internal structure of the chondritic acapulcoite-lodranite parent asteroid. Geochimica et Cosmochimica Acta, 242. 82-101 doi:10.1016/j.gca.2018.09.004 | Journal (article/letter/editorial) | | f Institute of Meteoritics, University of New Mexico, Albuquerque, NM 87131-0001, USA. g Department...chromium isotopic compositions among GRV 020043, Acapulco, Northwest Africa (NWA) 468 (metal-rich lodranite)...field in the Grove Mountains, Antarctica. This meteorite was originally classified as an ordinary chondrite...neither classification is correct, and that this meteorite rather documents the chondritic precursor of the...observations of GRV 020043 (the first petrologic type 4 “Acapulco” chondrite), and the oxygen and Cr isotopic compositions |  | | Journal (article/letter/editorial) | | continental crust composition. J. Schijf and H. J. W. de Baar: Rare earth element exchange through the Bosporus:...C. Higgs, T. R. S. Wilson, I. W. Croudace, G. J. De Lange, and P. J. Van Santvoort: Redistribution and...cations and their relationship to viscosity in albite melt. S. Ghosal and R. O. Sack: As-Sb energetics...Hutcheon: Chemical composition and origin of the Acapulco meteorite. M. Wadhwa and G. Crozaz: Trace and minor |  | McCoy, Timothy J., Corrigan, Catherine M., Dickinson, Tamara L., Benedix, Gretchen K., Schrader, Devin L., Davidson, Jemma (2019) Grove Mountains (GRV) 020043: Insights into acapulcoite-lodranite genesis from the most primitive member. Geochemistry, 79 (4) 125536 doi:10.1016/j.chemer.2019.125536 | Journal (article/letter/editorial) | | University, Bentley, WA, 6102, Australia d Center for Meteorite Studies, School of Earth and Space Exploration...subsequent overgrowths during metamorphism. Keywords: Meteorite Chondrite Acapulcoite Melting Asteroid Mineralogy...meteorites like Lodran (Bild and Wasson, 1976) and Acapulco (Palme et al., 1981). Together with ureilites...led to the recognition of meteorites similar to Acapulco and Lodran, establishment of acapulcoites and...possible chondritic precursor to acapulcoites. The meteorite is remarkable for the abundance of chondrules |  | | Journal (article/letter/editorial) | | Fagan et al. 2003; Liu et al. 2009), the Acapulco meteorite (El Goresy et al. 2005), a single clast in...opposed to all lunar, Martian, and HED occurrences, Acapulco—a primitive achondrite—displays rare vermicular...diopside (Si, Ca), spinel (Mg, Al), hematite (Fe), albite (Na), orthoclase (K), spessartite (Mn), rutile...properties have been addressed in the Antarctic Meteorite Newsletter (AMN). Detailed information and chemical...LAP 04838 The most intriguing and informative meteorite of our suite bearing in-situ symplectic mineral |  | | Journal (article/letter/editorial) | | several samples of the large Caddo County IAB iron meteorite reveal andesitic material enriched in Si, Na,...diopside (Di) occurs in the Caddo County IAB iron meteorite (Takeda et al. 2000) and represents a new type...Because of the high abundance of Na-rich plagioclase (albite, Ab), the bulk composition (SiO2 = 59 wt%) is within...from several IABs and the SmNd age of one IAB meteorite appear significantly younger at ∼4.53–4.43 Gyr...were apparent. No analyses were made of this meteorite. Methods The polished thin sections from Caddo |  | | Journal (article/letter/editorial) | | during its disruptive collision with the enstatite meteorite parent body-is not detectable. Chemical trends...probably produced during collision of the enstatite meteorite parent body’ (WATTERS and F’RINZ, 1979, 1980;...meteorites and F chondrites.] Two other meteorites, Acapulco and Allan Hills (ALH) A77081 differ mineralogically...geochemical and thermal fractionations during meteorite formation and evolution (BISWASet al., 1980; NEAL... Lipschutz 1626 Prior to running any other meteorite, we assessed experimental precision and accuracy |  | | Journal (article/letter/editorial) | | Pb-Pb age of Acapulco phosphate (Göpel et al. 1992) and the Mn-Cr/I-Xe ages for this meteorite. Understanding...between the chronometers is important because Acapulco phosphate has traditionally been used as the absolute...system. Subsequently, a re-examination of data from Acapulco phosphates (Amelin 2005) gave an age in line with...a correction that can be applied to enstatite meteorite 53Mn data to allow their data to be interpreted...lower limit on the initial iodine ratio in this meteorite. See text for discussion. The trapped 129Xe/132Xe |  | Shearer, C.K., Burger, P.V., Neal, C., Sharp, Z., Spivak-Birndorf, L., Borg, L., Fernandes, V.A., Papike, J.J., Karner, J., Wadhwa, M., Gaffney, A., Shafer, J., Geissman, J., Atudorei, N.-V., Herd, C., Weiss, B.P., King, P.L., Crowther, S.A., Gilmour, J.D. (2010) Non-basaltic asteroidal magmatism during the earliest stages of solar system evolution: A view from Antarctic achondrites Graves Nunatak 06128 and 06129. Geochimica et Cosmochimica Acta, 74 (3) 1172-1199 doi:10.1016/j.gca.2009.10.029 | Journal (article/letter/editorial) | | of Earth and Planetary Sciences, Univ. of New Mexico, Albuquerque, NM 87131, USA b Dept. of Civil Eng... of Earth and Planetary Sciences, Univ. of New Mexico, Albuquerque, NM 87131, USA d School of Earth and...8200 electron microprobe at the University of New Mexico (UNM). False colored maps were created from these...(micro-FTIR) nearIR spectra (University of New Mexico) of the alteration areas cross-cutting the fusion...on bulk rock material at the University of New Mexico. Hydrogen, sulfur, and carbon measurements were |  | Grew, E. S., Yates, M. G., Beane, R. J., Floss, C., Gerbi, C. (2010) Chopinite-sarcopside solid solution, [(Mg,Fe)3 ](PO4)2, in GRA95209, a transitional acapulcoite: Implications for phosphate genesis in meteorites. American Mineralogist, 95 (2) 260-272 doi:10.2138/am.2010.3153 | Journal (article/letter/editorial) | | and Mn/Fe = 0.3–0.8, are minor constituents of meteorite Graves Nunataks (GRA) 95209, a transitional acapulcoite...for the presence of chopinite in this meteorite. Keywords: Meteorite, phosphate, electron microprobe, electron...GRA95209 is a primitive achondrite, i.e., a stony meteorite lacking chondrules (near-spherical silicate objects...low pressures estimated for formation of this meteorite, all the reported compositions except the most...silicates. The phosphate data were calibrated with albite (NaKα, AlKα), diopside (MgKα, SiKα, CaKα), fluorapatite |  | | Journal (article/letter/editorial) | | graphite could survive even in a differentiated meteorite. Isotopic compositions of the metal phases and...among co-existing phases in the El Taco (IAB) meteorite. Not only were a variety of graphite morphologies...from those found in silicates and metal. Iron meteorite ages and the time of metal segregation are older...and Kallemeyn 2002) are given in parentheses. Meteorite Extraction temperature (°C) N (ppm) δ15Na (‰)...and Kallemeyn 2002) are given in parentheses. Meteorite Copiapo 2 Dayton, IIICD (Group: IAB-sLH) Haniet |  | | Report (chapter) | | found in volcanic rocks; however, low-temperature albite –anorthiteseries plagioclases are major components...from a weathered basalt flow near Pueblo Park, New Mexico, USA (Casey et al. 1988; Giletti & Casserly 1994)...Pellas et al. (1997) oligoclases from the Acapulco meteorite (no reported errors); (6) Boven et al. (2001)...(no reported errors); (9) Weirich et al. (2012) albite (1s); and (10) labradorite (this study). The Ar...Introduction and Diffusion of Argon into Natural Albite. Annual Report, Geophysics Laboratory 1969–1970 |  | | Journal (article/letter/editorial) | | pyroxene saturation surface in the system diopsid~albite-anorthite S. A. MORSE 163 Kiglapait E. R.... FISt11‘R 245 A search for primordial iron meteorite C. M. HOHENBERGand 251 I-Xe dating: intercomparisons...isotopes in animals 353 Etude experimentale de la fixation de mttaux par un mat&au sedimentaire actuel d’origine...algaire-I. Isolement, purification et caracterisation de la matiere organique PETER 9. WYLLIE M. L. COLEMAN...in J-R. DISNAR 363 Etude experimentale de la fixation de metaux par un materiau sedimentaire actuel |  | | Journal (article/letter/editorial) | | L. 9:1873 ( R ) de Baar H. J. W. 16:3285; 17:3503 de Lange G. J. 1:33; 17:3487 de Leeuw J. W. 2:347;...24:5141 de Pablo J. 20:4113 de Wit J. C. M. 6:1101 de Wit M. J. 14:2883 De Vivo B. 14:2941 De Yoreo J...Metamorphic Crystallization by R. Kretz 18:3877 Meteorite Craters and Impact Structures of the Earth by...R. Cronin Douglas E. Crowe James A. Davis Jan W. de Leeuw David J. DeMaster Donald B. Dingwell James...Davis W. Davison Hein J. W. de Baar Eric H. De Carlo Jan W. de Leeuw M. J. de Wit John M. DeHart David J |  | Trieloff, Mario, Falter, Martina, Buikin, Alexei I., Korochantseva, Ekaterina V., Jessberger, Elmar K., Altherr, Rainer (2005) Argon isotope fractionation induced by stepwise heating. Geochimica et Cosmochimica Acta, 69 (5) 1253-1264 doi:10.1016/j.gca.2004.08.018 | Journal (article/letter/editorial) | | to 10%. Typical silicate minerals are sericite, albite, quartz, and chlorite. In high-carbon shungites...sample, and up to 0.13% in a 4.5 Ga old (e.g., meteorite) sample. It is important to note that larger effects...example, based on the observation that the oldest meteorite 40Ar39 Ar plateau ages do not agree with the highest...(2000) 40Ar/39Ar age of plagioclase from Acapulco meteorite and the problem of systematic errors in cosmochronology...Comment on “40Ar/ 39 Ar age of plagioclase from Acapulco meteorite and the problem of systematic errors in cosmochronology” |  | | Journal (article/letter/editorial) | | in Cr/Ni versus Co/Ni composition for several meteorite types with chondritic composition (chondrites...2012). Impactors have been identified down to the meteorite type in only five of the 28 known large (>10 km...by either terrestrial mafic rocks or an iron meteorite. We have determined in this work the major and...1991) was employed for raw data reduction. Mineral (albite, diopside and orthoclase) and synthetic (NiO, MnTiO3...definitely rule out a contamination by an iron meteorite) based on Ir versus Ni, Cr, Co ratios. The reason |  | | Journal (article/letter/editorial) | | meteorites have led to the recognition of 13 iron meteorite groups (e.g., Malvin et al., 1984). Eleven of...they have been referred to as the magmatic iron meteorite groups (e.g., Wasson et al., 1980). In contrast...shed some light on their origin and evolution. meteorite MaltahOhe, raise the total number of IHCDs to...the silicate-bearing 552 FIG. 1. The 13 iron meteorite groups depicted in a log-log plot of Ga (ppm)... H-I0 in Wasson, 1985). The 11 magmatic iron meteorite groups (unlabelled outlines) have small ranges |  | (1994) Volume 58, 1994 List of Associate Editors and Reviewers, List of Contents, Subject Index, Author Index, Book Reviews Published, Books Received, Subject Areas of Manuscripts Published in 1994ished, Books Received,. Geochimica et Cosmochimica Acta, 58. doi:10.1016/0016-7037(94)90592-4 | Journal (article/letter/editorial) | | St. Petersbur& FL, USA Thomas M. Church,* Newark, DE, USA Ghislaine Crozaz, St. Louis, MO, USA D. J. Des...Davis James A. Davis W. Davison Hein J. W. de Baar Jan W. de Leeuw David J. DeMaster Michael J. DeNiro...hydrothermal ................................ 191 S. DE VILLIERS, G. T. SHEN, and B. K. NELSON:The Sr/Ca-tem~mture................... 209 B. G. K. VANAARSSEN,J. W. DE LEEUW, M. COLLINSON,J. J. BOON,and K. GOTH:Occurrence...M. E. COLLINSON,J. S. SINNINGHEDAMST~?,and J. W. DE LEEUW: Chemical and microscopical characterization |  | | Journal (article/letter/editorial) | | applied widely to both terrestrial rocks and meteorite samples (e.g., Spear and Parrish, 1996; Zipfel...UV laser for microsampling. APPLICATIONS TO METEORITE SAMPLES Cooling Rates of Selected H Chondrites...represent a small fraction (-1.6%) of the total meteorite abundance. Bogard et al. ( 1 990) presented a...they used the available data of Giletti (1991) for albite. However, the plagioclase in mesosiderite has -90%...-3 orders of magnitude slower than that in pure albite. Thus, the Nd diffusion in plagioclase in mesosiderites |  | | Journal (article/letter/editorial) | | chondrite. All properties are consistent with this meteorite having been recrystallized and partially melted...i n e d mineralogic-chemical study of such a meteorite. 2. Experimental Y a m a t o 74160 is a n e a...tested previously using Allende standard reference meteorite [13]. 3. Results 3.1. Mineralogy and petrology...Cr203, MnO and MgO. c Mole percent orthoclase (Or), albite (Ab) and anorthite (An) end-members. a CaO, NazO...(see text). grained portions of Y74160. This meteorite contains less metal--reflected both by major (Table |  | | Journal (article/letter/editorial) | | St. Petersburg, FL, USA Thomas M. Church,* Newark, DE, USA Ghislaine Crozaz, St. Louis, MO, USA D. J. Des...Davis James A. Davis W. rhvison ffein J. W. de Baar Jan W. de Leeuw David J. DeMaster Michael J. DeNiro...acidic forest soils: Long-term changes due to acid de~sition T. B. BAtand A. KOSTERVANGROOS:Diffusion...stoichiomet~ and Ostwald’s Step Rule ., . .. 19i S. DE VILLIERS,G. T. SHEN, and B. K. NELSON: The Sr/Ca-temperature................... 209 B. G. K. VANAARSSEN,J. W. DE LEEUW,M. COLLINSON,J. J. BOON, and K. GOTH: Occurrence |  | BRIDGES, J. C., ALEXANDER, C. M. O'D., HUTCHISON, R., FRANCHI, I. A., PILLINGER, C. T. (1997) Sodium-, chlorine-rich mesostases in Chainpur (LL3) and Parnallee (LL3) chondrules. Meteoritics & Planetary Science, 32 (4) 555-565 doi:10.1111/j.1945-5100.1997.tb01300.x | Journal (article/letter/editorial) | | 6), is a blocky material containing nepheline, albite (Ashworth, 1981; Hutchison et al., 1979) and an...textures, with plagioclase (A), sodalite (So) and albite (Ab) crystallites intergrown with pyroxene dendrites...silica undersaturation in the forsterite-diopside-albite-quartz-nephelinesystem (Cox et al., 1979). The...of scapolite in the Bishunpur (LL3) chondritic meteorite. Min. Mag. 51, 733-735. ALEXANDER C. M. OD., HUTCHISON...HUTCHISON R. (1995) The history of the Pamallee meteorite as revealed by iodine-xenon dating (abstract) |  | | Journal (article/letter/editorial) | | however, from the oxygen inventory of other meteorite classes (Nagahara and Ozawa 1986; McCoy et al...the conclusion of previous authors that this meteorite clan was generated by complex and diverse processes...(1991). According to the latter authors, the meteorite is composed mainly of orthopyroxene and olivine...accessory phosphates were observed. Dho 125 This meteorite (Dho = Dhofar) was found in Oman on the Arabian...place this very heterogeneous, coarse-grained meteorite into a transitional position (Field et al. 1993; |
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