 | | Journal (article/letter/editorial) | | 2005.03.051 A menagerie of graphite morphologies in the Acapulco meteorite with diverse carbon and nitrogen...Naturelle, Laboratoire d’étude de la matière extraterrestre, Département Histoire de la Terre, 61 rue Buffon...isotopic compositions of graphites in the Acapulco meteorite, the latter determined by secondary ionization...mass spectrometry, are reported. Seven different graphite morphologies were recognized, the majority of...occur enclosed exclusively in kamacite. Individual graphite grains also rarely occur in the silicate matrix |  | 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 |  | | 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) | | isotopes and nanostructures of carbon phases in Acapulco and Lodran E. Charon, J. Aléon, J.- N. Rouzaud...isotopes and nanostructures of carbon phases in Acapulco and Lodran, Geochimica et Cosmochimica Acta (2014)... 3 Acapulco and Lodran 4 5 E. Charon1,2,3, J. Aléon1,*, J.- N. Rouzaud2 6 7 8 9 1 Centre de Sciences...Sciences Nucléaires et de Sciences de la Matière, CNRS/IN2P3 - Université Paris 10 Sud XI, UMR CNRS 8609...Bat 522, 91191 Gif sur Yvette, France. Laboratoire de Géologie, UMR CNRS 8538, Ecole Normale Supérieure |  | | Journal (article/letter/editorial) | | Morris (Wisconsin), Pontlyfni, Kakangari and Acapulco, plus a chondritic inclusion from the Cumberland...indigenous carbon component in these specimens is graphite, with a Si3Cvalue of between -9.5 and -2.8460...8460,close to the range reported for graphite in both enstatite chondrites and IAB irons. Thus the links...“winonaites”, and there is no basis for including this meteorite in any group with IAB irons or enstatite chondrites...“winonaites”, but the carbon isotopic composition of graphite precipitated from metal (S13C= -20%) and from |  | | 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 |  | Mostefaoui, Smaïl, Perron, Claude, Zinner, Ernst, Sagon, Gérard (2000) Metal-associated carbon in primitive chondrites: structure, isotopic composition, and origin. Geochimica et Cosmochimica Acta, 64 (11) 1945-1964 doi:10.1016/s0016-7037(99)00409-3 | Journal (article/letter/editorial) | | ERNST ZINNER,2 and GÉRARD SAGON3 1 2 Laboratoire de Minéralogie, Muséum National d’Histoire Naturelle...interstellar grains (diamonds, silicon carbide, graphite) with very anomalous isotopic composition (Anders...metal grains of the ordinary chondrite Bishunpur. Graphite inclusions in metal have been known for a long...chondrites (Keil, 1968), as well as in the Acapulco meteorite (Palme et al., 1981; El Goresy et al., 1995)...found in graphite inclusions within metal grains of Acapulco (El Goresy et al., 1995), a meteorite that has |  | Dhaliwal, Jasmeet K., Day, James M.D., Corder, Christopher A., Tait, Kim T., Marti, Kurt, Assayag, Nelly, Cartigny, Pierre, Rumble, Doug, Taylor, Lawrence A. (2017) Early metal-silicate differentiation during planetesimal formation revealed by acapulcoite and lodranite meteorites. Geochimica et Cosmochimica Acta, 216. 115-140 doi:10.1016/j.gca.2017.06.042 | Journal (article/letter/editorial) | | Institut de Physique du Globe de Paris, Université Paris Diderot, Institut Universitaire de France,...geochemistry, and oxygen isotopes for Acapulco, Allan Hills (ALHA) 81187, Meteorite Hills (MET) 01195, Northwest...and N isotope ratios of graphite grains in the archetype meteorite, Acapulco, indicate distinct source...several examples of paired meteorites (e.g., Meteorite Hills [MET] 01195 is paired with MET 01198 and...acapulcoites or lodranites, but that are in fact other meteorite types (e.g., ureilite Miller Range 091004; Day |  | | Journal (article/letter/editorial) | | carrier phase in Dimmitt is graphite or a phase associated with graphite (Niederer and Eberhardt, 1977)...RECORDS OF THE ACAPULCO METEORITE M. Christophe Michel-Levy and J.C. Lorin, Laboratoire de Mineralogie....Mainz Concentrations of 49 elements of the Acapulco meteorite have been determined by instrumental radiochemical...analysis. Bulk composition and mineralogy of the meteorite is chondritic. The major element composition is...abundances of other volatile elements such as Zn. 9. Acapulco has equilibrated at relatively high temperatures |  | | Journal (article/letter/editorial) | | acapulcoites experienced appreciable reduction. Because graphite is present in some acapulcoites and lodranites...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...highly weathered acapulcoite Superior Valley 014). Graphite occurs in several characteristic morphologies |  | | 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) | | 2006) Abstract–The Frontier Mountain (FRO) 93001 meteorite is a 4.86 g fragment of an unshocked, medium-...03 and 4.557 ± 0.002 Sm-Nd and Pb-Pb ages for Acapulco (Prinzhofer et al. 1992; Göpel et al. 1992) and...ranging from 4.521 ± 0.006 to 4.49 ± 0.01 Ga for the Acapulco, Monument Draw, Allan Hills (ALH) 81187, and ALH...The paucity of basaltic rocks in the world’s AL meteorite collection is partly attributed to removal from...small meteorite of 4.86 g (Fig. 1) found on the blue ice field of the Frontier Mountain meteorite trap |  | McCoy, T.J., Carlson, W.D., Nittler, L.R., Stroud, R.M., Bogard, D.D., Garrison, D.H. (2006) Graves Nunataks 95209: A snapshot of metal segregation and core formation. Geochimica et Cosmochimica Acta, 70 (2) 516-531 doi:10.1016/j.gca.2005.09.019 | Journal (article/letter/editorial) | | metal–silicate–sulfide matrix is cut by metal-rich, graphite-bearing veins exceeding 1 cm in width and grades...occur with chromite, tetrataenite, schreibersite, graphite, and a range of phosphates. An 39Ar–40Ar age of...is supported by the graphite structures and isotopic compositions. The graphite rosettes in the metal-rich...allocation of this meteorite. The original 948.8 g flight-oriented mass of the meteorite was initially broken...concentrated metal up to 1 cm in diameter. The meteorite was classified as a lodranite and mineral compositions |  | | 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 |  | 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) | | two metal samples of the Portales Valley (H6) meteorite which both are inconsistent with signatures in...silicates in the same objects (ⱖ12% difference in Acapulco; Sturgeon and Marti, 1991), which reveal a lack...signatures in the case of the re-crystallized Acapulco meteorite. If the survival of precursor materials extends...obtained in our laboratory for silicates in a meteorite and for the moon (11.6 ⫾ 1.4 pg 15N/g/Ma) (Kim...also included samples from the Portales Valley meteorite which was classified an H6 chondrite, although |  | 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 |  | 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 |  | 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 |  | 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...stringers in metal, including a ring around a graphite rosette. Electron microprobe analyses of sarc...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 |  | | Journal (article/letter/editorial) | | constrained, the lack of basaltic rocks in the world’s meteorite collections complementary to the lodranites suggests...ancient 39Ar-JoAr ages of two acapulcoites of 4.5 1 (Acapulco) and 4.52 Ga (Monument Draw). and of one lodranite...volcanism. We also measured volatile contents in Acapulco and Lodran to gain insight into the fate of volatiles...textures. The volatile contents of a sample of Acapulco (8 1.59 mg) and one of Lodran (80.35 mg) were...exceed the escape velocities of asteroidal-sized meteorite parent bodies, and melts will leave the parent |  | | Journal (article/letter/editorial) | | es the calibration of the I{Xe system based on Acapulco phosphate. This can be tied, in turn, to an absolute...limited to Earth, Mars and the asteroids (as meteorite parent bodies). The theory of radial variation... a simple relation between the properties of meteorite classes and radial distance has been questioned... 2040 J. D. Gilmour and J. M. Saxton itive meteorite are observed to yield a range of ages suggests...(separates and individual grains) from the meteorite Acapulco (Nichols et al. 1994). There Phil. Trans |  | MOSTEFAOUI, Smail, ZINNER, Ernst, HOPPE, Peter, STADERMANN, Frank J., GORESY, Ahmed El (2005) In situ survey of graphite in unequilibrated chondrites: Morphologies, C, N, O, and H isotopic ratios. Meteoritics & Planetary Science, 40 (5) 721-743 doi:10.1111/j.1945-5100.2005.tb00976.x | Journal (article/letter/editorial) | | online at http://meteoritics.org In situ survey of graphite in unequilibrated chondrites: Morphologies, C...in situ morphological and isotopic studies of graphite in the primitive chondrites Khohar (L3), Mezˆ-Madaras...Acfer 214 (CH3), and St. Marks (EH5). Various graphite morphologies were identified, including book,...fibrous, fine-grained, spherulitic, and granular graphite, and cliftonite. SIMS measurements of H, C, N...show significant variations among the different graphite types without displaying any strict correlation |  | | Journal (article/letter/editorial) | | with distinct N signatures found in the metal and graphite of IAB irons. In this study, a dozen IAB/IIICD...isotopically heterogeneous graphite could survive even in a differentiated meteorite. Isotopic compositions...phases in the El Taco (IAB) meteorite. Not only were a variety of graphite morphologies found to have...from those found in silicates and metal. Iron meteorite ages and the time of metal segregation are older...of inclusions. Since the presence of silicates, graphite, or troilite in the metal matrix can potentially |  | | Journal (article/letter/editorial) | | Impact melting of the largest known enstatite meteorite: Al Haggounia 001, a fossil EL chondrite Alan...melt rock with a mass of ~3 metric tons. The meteorite exhibits numerous shock effects including (1)...severely weathered. Literature data indicate the meteorite fell ~23,000 yr ago; numerous secondary phases...Chennaoui-Aoudjehane et al. 2007, 2009). Because the meteorite fell in the Late Quaternary and portions of it...a “fossil meteorite” (e.g., Bunch et al. 2014). Severely weathered regions of the meteorite are fractured |
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