 | Palme, H, Schultz, L, Spettel, B, Weber, H.W, Wänke, H, Michel-Levy, M.Christophe, Lorin, J.C (1981) The Acapulco meteorite: Chemistry, mineralogy and irradiation effects. Geochimica et Cosmochimica Acta, 45 (5) 727-752 doi:10.1016/0016-7037(81)90045-4 | Journal (article/letter/editorial) | | The Acapulco meteorite: chemistry, mineralogy and irradiation effects H. PALME.L. SCXULTZ,B. SPETTEL...CHRISTOPHE MICHEL-LEVYand J. C. LORIN Laboratoire de M~n~ralo~e-Cristal~o~apie, Universitk Pierre et Marie...January 1981) Acapulco meteorite fell in August, 1976, at El Quemado, near Acapulco, Mexico. It is a unique...mineral chemical data indicate formation of the meteorite under AWra&--The redox conditions intermediate...volatile element abundances. Compared to H-chondrites Acapulco is enriched in refractory siderophile elements |  | 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...low-Ca pyroxene (40 vol.%), olivine (24 vol.%), diopside (8 vol.%), plagioclase (10 vol.%)，Fe-Ni metal...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 |  | | Journal (article/letter/editorial) | | radius and, based on the precise Pb–Pb age for Acapulco of 4555.9 ± 0.6 Ma, combined with the Hf/W and...Wasson (1976) suggested that Lodran, the type meteorite of the lodranites, resulted from partial differentiation...metallic Fe,Ni as inclusions in silicates and in the meteorite matrix (Herrin et al., 2005), troilite, chromite...strong evidence that the parent lithology of this meteorite clan was chondritic (Fig. 3). Systematic compositional...fall* , location, and mass. Abbrev. Acapulcoites Acapulco* Allan Hills A77081+ Allan Hills A78230+ Allan |  | | Journal (article/letter/editorial) | | Single grain (U^Th)/He ages from phosphates in Acapulco meteorite and implications for thermal history Kyoungwon...2003 Abstract The cooling history of the Acapulco meteorite for s 400‡C is well established using various...minimum age representing primary cooling of the Acapulco body passing through V120‡C. Although it is impossible...crystallization age of the Acapulco meteorite. The new (U^Th)/He data suggest rapid cooling of Acapulco down to V120‡C...Ar/39 Ar age (4507 8 9 (1c) Ma) obtained from Acapulco plagioclase, which should reflect cooling through |  | | 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 |  | | Journal (article/letter/editorial) | | Comment on `40 Ar/39Ar age of plagioclase from Acapulco meteorite and the problem of systematic errors in cosmochronology'...the implication that the thermal history of Acapulco meteorite is su¤ciently well known to establish that...et al. Unfortunately, the Q and L3 activity data de¢ning the decay constants are too scattered to support...by Begemann et al. [3]. If one could select a meteorite with well-documented and precisely determined...would certainly be feasible. We did not propose Acapulco for this purpose in part because the 207 Pb/206 |  | | 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 |  | Weigel, Andreas, Eugster, Otto, Koeberl, Christian, Michel, Rolf, Kr̈ahenb̈uhl, Urs, Neumann, Sonja (1999) Relationships among lodranites and acapulcoites: noble gas isotopic abundances, chemical composition, cosmic-ray exposure ages, and solar cosmic ray effects. Geochimica et Cosmochimica Acta, 63 (2) 175-192 doi:10.1016/s0016-7037(99)00012-5 | Journal (article/letter/editorial) | | QUE93148, Y74357, Y791491) and four acapulcoites (Acapulco, ALH81187, ALH81261, ALH84190), as well as major...study that Lodran is a partially differentiated meteorite, which—to a great extent— has lost minerals that...achondrite. The Acapulco meteorite fell in 1976 on the outskirts of Acapulco, State of Guerrero, Mexico (Sean,...ALH77081 in many respects (Mason, 1978). The Gibson meteorite was found in October 1991 north of Esperance,...Australia (Wlotzka, 1992). The Monument Draw meteorite was found in 1985 near Monument Draw, Andrews |  | Papike, J.J., Spilde, M.N., Fowler, G.W., Layne, G.D., Shearer, C.K. (1995) The Lodran primitive achondrite: petrogenetic insights from electron and ion microprobe analysis of olivine and orthopyroxene. Geochimica et Cosmochimica Acta, 59 (14) 3061-3070 doi:10.1016/0016-7037(95)00195-6 | Journal (article/letter/editorial) | | Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131-I 126, USA (Received August...may take place by two reactions: The Lodran meteorite is a primitive achondrite that fell on October...first relatively complete description of this meteorite was provided by Tschermak ( 1870) and the first...minor amounts of sulfide, chromite, and chrome diopside. Bild and Wasson (1976) noted that the orthopyroxene...Additional chemical data has been provided on Acapulco- and Lodran-like achondrites by Field et al. ( |  | McCoy, T.J., Keil, K., Clayton, R.N., Mayeda, T.K., Bogard, D.D., Garrison, D.H., Huss, G.R., Hutcheon, I.D., Wieler, R. (1996) A petrologic, chemical, and isotopic study of Monument Draw and comparison with other acapulcoites: Evidence for formation by incipient partial melting. Geochimica et Cosmochimica Acta, 60 (14) 2681-2708 doi:10.1016/0016-7037(96)00109-3 | Journal (article/letter/editorial) | | chemical, and isotopic studies of acapulcoites (Acapulco, Monument Draw, Yamato 74063, ALH A77081, ALH...veins or form separate veins in Monument Draw and Acapulco. Heating and cooling of acapulcoites occurred...distinctly younger than the likely formation time for Acapulco of 4.557 Ga, but are older than analogous 39Ar-4°Ar...with the acapulcoites; lodranites and the unique meteorite LEW 86220 are discussed in separate papers (McCoy...well as ureilites. Plotted are the acapulcoites Acapulco, Monument Draw, ALH A77081, ALH 78230, Yamato |  | Schultz, L., Palme, H., Spettel, B., Weber, H.W., Wänke, H., Michel-Levy, M. Christophe, Lorin, J.C. (1982) Allan Hills 77081—an unusual stony meteorite. Earth and Planetary Science Letters, 61 (1) 23-31 doi:10.1016/0012-821x(82)90034-6 | Journal (article/letter/editorial) | | Netherlands [‘I Allan Hills 7708 1-an unusual stony meteorite L. Schultz, H. Palme, B. Spettel, H.W. Weber...Christophe Laboratoire fiir Chemie, D-6500 Michel-Levy de Mindralogie-Crislallographie, Maim (F R.G.) and...In many respects this meteorite is similar to the unusual stone meteorite Acapulco. The REE pattern of...spite of the high degree of recrystallisation the meteorite contains trapped noble gases in amounts comparable...petrographic description by Mason [2] showed that this meteorite is achondritic in texture, but that the mineralogical |  | | Journal (article/letter/editorial) | | group 3A mesosiderite; as well as on Acapulco, an unclassified meteorite with chondritic chemical composition...were obtained yielding ages of 4.60 + 0.03 AE for Acapulco, 4.47 * 0.02 AE for Morristown, and 4.46 f 0.02...Ibitira, the mesosiderite Morristown (group 3A), and Acapulco (unclassified). The results of the ‘?$rn- 14*Ndsystem...disturbed systems (MITTLEFEHLDTet al., 1986). Acapulco is an unttsual object with the bulk chemistry...there is a new report on the Sm-Nd system in this meteorite (BROUXELand TATSUMOTO,1991 f. ~ETR~~PHY fbitira |  | Touboul, Mathieu, Kleine, Thorsten, Bourdon, Bernard, Van Orman, James A., Maden, Colin, Zipfel, Jutta (2009) Hf–W thermochronometry: II. Accretion and thermal history of the acapulcoite–lodranite parent body. Earth and Planetary Science Letters, 284 (1) 168-178 doi:10.1016/j.epsl.2009.04.022 | Journal (article/letter/editorial) | | these results to the thermal histories of other meteorite parent bodies, the Hf–W system was applied to...interiors. The different thermal histories of most meteorite parent bodies, therefore, primarily reflect variations...accretion timescale and early thermal history of meteorite parent bodies is key for understanding the formation...daughter elements among the different minerals in a meteorite (Dodson, 1973; Ganguly and Tirone, 2001). Most...lower than the peak temperatures reached in most meteorite parent bodies and as such provide constraints |  | McCoy, Timothy J., Keil, Klaus, Bogard, Donald D., Garrison, Daniel H., Casanova, Ignacio, Lindstrom, Marilyn M., Brearley, Adrian J., Kehm, Karl, Nichols, Robert H., Hohenberg, Charles M. (1995) Origin and history of impact-melt rocks of enstatite chondrite parentage. Geochimica et Cosmochimica Acta, 59 (1) 161-175 doi:10.1016/0016-7037(94)00231-a | Journal (article/letter/editorial) | | Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87 13 1, USA 6McDonnell Center...enstatite-dominated parent bodies formed. The enstatite meteorite clan includes diverse, highly reduced chondritic...impact between a molten and a solid, enstatite meteorite-like planetesimal (Keil et al., 1989). Here we...130. This revealed the unusual nature of the meteorite and prompted us to organize a consortium study...study, for which a large, triangular piece of the meteorite measuring 5.5 X 4.5 cm was obtained. Polished |  | | 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...following natural and synthetic standards were used: diopside (Si, Ca), spinel (Mg, Al), hematite (Fe), albite...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) | | compared to published 182Hf–182W data for other meteorite groups. Based on this comparison, a broader genetic...Draw consists of olivine, orthopyroxene, chromian diopside, plagioclase, Fe–Ni metal, troilite and chromite...NWA 1457. Winona, the type specimen for this meteorite group as well as Mount Morris (Wisconsin) are...are not available, but it is expected that this meteorite also has an exposure age similar to the winonaite..., 2004; Schulz et al., 2009 and this study). Meteorite Acapulcoites Dhofar 125 Monument Draw Lodranites |  | | Journal (article/letter/editorial) | | processes have been invoked previously for other meteorite groups. Rubin (2004) studied 210 equilibrated...1 Thin sections examined in the current study Meteorite Sections Classification Shock stage ALH A77081...extinction indicative of shock-stage S5. The meteorite contains several fine-grained metal–troilite assemblages...and Schultz et al. (1982) reported graphite in Acapulco and ALH A77081; El Goresy et al. (2005, and references...abundances of phases in acapulcoites and lodranites Meteorite Section Group No. of points ALH A77081 17 acapulcoite |  | | Journal (article/letter/editorial) | | several samples of the large Caddo County IAB iron meteorite reveal andesitic material enriched in Si, Na,...rich in plagioclase and diopside (Di) occurs in the Caddo County IAB iron meteorite (Takeda et al. 2000)...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...6.6 mm. Note the aligned inclusions in a large diopside crystal on the left. obtained from several extractions |  | McCoy, T.J., Keil, K., Clayton, R.N., Mayeda, T.K., Bogard, D.D., Garrison, D.H., Wieler, R. (1997) A petrologic and isotopic study of lodranites: Evidence for early formation as partial melt residues from heterogeneous precursors. Geochimica et Cosmochimica Acta, 61 (3) 623-637 doi:10.1016/s0016-7037(96)00359-6 | Journal (article/letter/editorial) | | Research; MAC, LEW, and EET = Meteorite Working Group; FRO = European Meteorite Group). Several of the meteorites...sought the largest and smallest grains in each meteorite. Inclusion of these grains did not significantly...abundances between lodranites. Unfortunately, meteorite slices on many thin sections of Antarctic lodranites...given the extensive studies of the 1 kg Lodran meteorite, the uniform enrichments of metal and depletions...minor amounts of chromite, troilite, and chromian diopside, vari- Petrogenesis of lodranites TABLE 625 |  | | Journal (article/letter/editorial) | | Ma ago, or later than formation times of most meteorite parent bodies. For all three meteorites, the Ar–Ar...possible disruption and partial reassembly of meteorite parent bodies to form some meteorites likely was...et al., 2008; Halliday and Kleine, 2008). Some meteorite types, e.g., chondrites and mesosiderites, indicate... also were important processes on many early meteorite parent bodies, and textural and chronological...of impact heating has been given for several meteorite types (Bogard, 1995; Mittlefehldt et al., 1998; |  | 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...Enstatite, forsterite, plagioclase, and less commonly, diopside are found in the vicinity of the phosphate. Forsterite |  | | Journal (article/letter/editorial) | | 1996; Mittlefehldt, 2014). 116 Twenty two meteorite samples including 7 types of achondrites and 2...silicate 126 inclusion, and Zag (b) groups. Meteorite samples from acapulcoite-lodranite and winonaite-IAB-...1997). 135 Acapulco from this group was analyzed in this study. The major minerals in Acapulco are 136...with some olivine and minor plagioclase 151 and diopside, was also analyzed (Mason and Jarosewich, 1967;...al., 2002). This group contains fassaite (Al-Ti-diopside), Ca-rich 162 olivine (kirschsteinite), and |  | | Journal (article/letter/editorial) | | suffered minor metamorphic recrystallization. Acapulco and Allan Hills A77081, am closely mlated and...alteredcomposition. Udei Station appearsto be a IAB meteorite even though its FeO/(FeO + MgO) ratio is slightly...slightly above the IAB tield. The highly weathered meteorite Tierra Blanca is closely related to IAB but has...planetary-type primordial rare gases to be chondritic: Acapulco, Allan Hills A77081, Enon, UNGROUPEDCHONDRIX meteorites...of an incomplete sam- signed to the IAB iron meteorite group, its silicate inclusions are more oxidized |  | | Journal (article/letter/editorial) | | meteorites with an affinity to Lodran (stony-iron meteorite) and their formation processes. This group is...contains in addition plagioclase. EET84302 has an Acapulco-like chondritic mineral assembladge and is enriched...and MAC88177 Opx crystals have dusty cores as in Acapulco. EET84302 and Y75274 are more Mgrich than other...assemblages do not correspond to those of known meteorite groups (Bell, 1991; Gaffey et al., 1993). Some...relationships between the new meteorites and existing meteorite groups, we define the latter mineralogically. |
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