 | Prinz, M., Keil, K., Hlava, P.F., Berkley, J.L., Gomes, C.B., Curvello, W.S. (1977) Studies of Brazilian meteorites. Earth and Planetary Science Letters, 35 (2) 317-330 doi:10.1016/0012-821x(77)90134-0 | Journal (article/letter/editorial) | | R I T E S , III. ORIGIN AND HISTORY OF THE ANGRA DOS REIS ACHONDRITE M. P R I N Z Department of Mineral...87131 (USA} C.B. G O M E S Instituto de Geociencias, Universidade de Sao Paulo, Sao Paulo (Brasil) and W...W.S. C U R V E L L O Museu Nacional, Rio de Janeiro (Brasil) Received November 12, 1976 Revised version...version received March 14, 1977 The Angra dos Reis meteorite fell in 1869 and is a unique achondrite. It...calcic olivine (Fo53.1 ; 1.3% CaO), green hercynitic spinel, whitlockite (merrillite), metallic Ni-Fe, troilite |  | | Book | | 523.5'1'0981 ISBN 0-8263-0543-1 2. Meteorites—Brazil. II. Title. 80-5333 © 1980 by the University of...recognize a meteorite. Brazilian stone meteorites. 7.1. ACHONDRITES . 7.1.1. Fassaite achondrite. Angra dos Reis...Reis . 7.1.2. Augite-olivine achondrite . Governador Valadares. 7.1.3. Monomict pigeonite-plagioclase...e achondrites . . . Ibitira. Serra de Mage.:. 7.2. CHONDRITES. 7.2.1. H-group chondrites. Avanhandava.... Itapicuru Mirim . Macau. Marflia. Sao Jose do Rio Preto. Sete Lagoas. Uberaba. 7.2.2. L-group chondrites |  | Kurat, G., Varela, M.E., Brandstätter, F., Weckwerth, G., Clayton, R.N., Weber, H.W., Schultz, L., Wäsch, E., Nazarov, M.A. (2004) D’Orbigny: A non-igneous angritic achondrite?. Geochimica et Cosmochimica Acta, 68 (8) 1901-1921 doi:10.1016/j.gca.2003.10.016 | Journal (article/letter/editorial) | | Postfach 417, A-1014 Vienna, Austria CONICET—Dept. de Geologia, Universidad Nacional del Sur, 8000 Bahia...highly porous decomposition rims of Cr-enriched Al-spinel and record mildly oxidizing conditions prevailing...metasomatic granoblastic rocks (LEW 86010, Angra dos Reis?) and aggregates (D’Orbigny). In addition,...chondrites. U-Pb, Th-Pb and Pb-Pb ages for Angra dos Reis and LEW 86010 are between 4.54 and 4.5578 Ga...and Marti, 1977 —Angra dos Reis), 4.56 Ga (Jacobsen and Wasserburg, 1984 —Angra dos Reis) and 4.55 and 4 |  | | Journal (article/letter/editorial) | | Netherlands [41 G E N E S I S O F T H E A N G R A DOS R E I S A N D O T H E R A C H O N D R I T I C M E...element abundances were determined in seven Angra dos Reis samples including whole rocks, fassaite (clinopyroxene)...earth element (REE) abundance pattern for the Angra dos Reis clinopyroxene separates shows a concave downward...data shows the presence of ~ 3% olivine, ~2.6% spinel and small amounts of metallic Ni-Fe and troilite...abundances in the derivative magma from which the Angra dos Reis clinopyroxene crystallized were estimated from |  | | Journal (article/letter/editorial) | | Minor and accessory phases include kirschsteinite, spinel, ulvöspinel, metallic Fe,Ni, troilite, titanomagnetite...an angrite, the type meteorite that fell into the Bay of Angra dos Reis, Brazil, at about 5:00 a.m. in...by the ADORABLES (1976), the members of the Angra dos Reis Consortium, of the only angrite known at the...fall had been observed by a local judge and the meteorite weighing ∼1500 g was recovered by a diver from...Plutonic angrites Date of fall/find Location Angra dos Reis (stone)a LEW 86010 NWA 2999b NWA 3158b NWA |  | | Book | | America 123 Rogelio Daniel Acevedo Centro Austral de Investigaciones Científicas Tierra del Fuego Argentina...Argentina Víctor Manuel García Centro Austral de Investigaciones Científicas Tierra del Fuego Argentina...the Centro Austral de Investigaciones Científicas (CADIC) and the Consejo Nacional de Investigaciones Científicas.... . . . . . . . . . . . . . . . . . 35 37 4 Brazil. . . . . . . . . . . . . . . . . . . . . . . ....to reach to the Earth’s surface it is called a meteorite. So meteorites are small solid masses coming from |  | | Journal (article/letter/editorial) | | revisedform August 29, 1990) Abstract-The angrites Angra dos Reis, LEW86010, and LEW87051 are petrologically...angrites have fractionated Ca/Al ratios, with Angra dos Reis exhibiting the most extreme ratio (3.1 X CI)...presence of significant cumulus material. For Angra dos Reis, cumulus material may be the cause of the high...and LEW8705 1 show similar patterns, while Angra dos Reis has both greater enrichments in these elements...in Angra dos Reis remains obscure. The differences between the LEW860 IO-LEW8705 1 duo and Angra dos |  | | Journal (article/letter/editorial) | | crystallization experiments on the Angra dos Reis achondritic meteorite G.E. Lofgren a and A.B. Lanier...clearly have a melt origin the hypothesis that Angra dos Reis (ADOR) itself is a cumulate is being reconsidered...interval before the appearance of kirschsteinite, spinel, and a pyroxferroite-like phase. Alternatively...3 % ) a n d calcic olivine with t r a c e s o f spinel, whitlockite, k i r s c h s t e i n i t e w i t...[4] has r e n e w e d i n t e r e s t in A n g r a dos R e i s ( A D O R ) , t h e " t y p e " a n g r i |  | | Journal (article/letter/editorial) | | 2108 crystallization properties of the Angra dos Reis meteorite. This bulk composition is unusual in that...study approximates the composition of the Angra dos Reis meteorite (ADOR) as determined by Mittlefehldt and...°C/h to 1225 °C. pyx = pyroxene; gl = glass; sp = spinel; rh = rhonite; kir = kirschsteinite. to suppress...(Fig. 2b). In ADE106, kirschsteinite, merrillite, spinel, and a rhonite-like mineral crystallized as mesostasis...relationship with the spinel. At the quartz-fayalite-magnetite buffer, spinel is the stable phase and |  | BHANDARI, N., MURTY, S. V. S., SHUKLA, P. N., MAHAJAN, R. R., SHUKLA, A. D., SUTHAR, K. M., PARTHASARATHY, G., PALIWAL, B. S. (2005) Bhawad LL6 chondrite: Chemistry, petrology, noble gases, nuclear tracks, and cosmogenic radionuclides. Meteoritics & Planetary Science, 40 (7) 1015-1021 doi:10.1111/j.1945-5100.2005.tb00170.x | Journal (article/letter/editorial) | | indicate that the meteorite belongs to metamorphic grade 6. To classify the meteorite, they carried out...carried out a detailed chemical analysis of this meteorite, analyzing it for cosmogenic effects, e.g., radionuclides...atmosphere shortly before its fall (Fig. 1). The meteorite was examined for its texture and mineralogy using...partially replaced by matrix, as shown in Fig. 2. The meteorite shows a higher class of metamorphism from the...the high degree of metamorphism suffered by the meteorite. A large feldspathic chondrule with degraded rim |  | Floss, Christine, Crozaz, Ghislaine, McKay, Gordon, Mikouchi, Takashi, Killgore, Marvin (2003) Petrogenesis of angrites. Geochimica et Cosmochimica Acta, 67 (24) 4775-4789 doi:10.1016/s0016-7037(03)00310-7 | Journal (article/letter/editorial) | | Bunkyo-ku, Tokyo 113-0033, Japan 4 Southwest Meteorite Laboratory, P.O. Box 95, Payson, AZ 85547, USA...differ from those of the other angrites. This meteorite seems to have crystallized from a different source...recently been reported (Jambon et al., 2002). Angra dos Reis is dominated by megacrysts of the clinopyroxene...data further emphasize the distinct nature of Angra dos Reis. Crozaz and McKay (1990) carried out detailed...element analyses of individual minerals from Angra dos Reis and LEW 86010 and concluded that, despite common |  | MARKOWSKI, A, QUITTE, G, KLEINE, T, HALLIDAY, A, BIZZARRO, M, IRVING, A (2007) Hafnium–tungsten chronometry of angrites and the earliest evolution of planetary objects. Earth and Planetary Science Letters, 262 (1) 214-229 doi:10.1016/j.epsl.2007.07.035 | Journal (article/letter/editorial) | | the more slowly cooled angrites (NWA 2999, Angra dos Reis, LEW 86010, average age: 4557.7± 0.2 Ma) reflect...address: Laboratoire des Sciences de la Terre, CNRS/ENS Lyon/Univeristé de Lyon, 46 allée d’Italie, 69364...2004), whereas the ‘slowly cooled’ angrites (Angra dos Reis — AdoR, LEW 86010, NWA 2999) exhibit metamorphic...al., 2002) but can also be used to determine meteorite ages. Hafnium-182 decays to 182W with a half-life...NWA 2999 and two whole-rock fractions from each meteorite) have been measured for their Hf and W concentrations |  | | Journal (article/letter/editorial) | | samples, including pairings, as of March 2017; Meteorite Database; http://www.lpi.usra.edu/meteor/) of... 2006). Surprisingly, the “type specimen,” Angra dos Reis (AdoR), differs from the rest of the group...(stepped combustion) of milligram-sized aliquots of meteorite. The samples analyzed, and their sources, are...Because the samples that exhibit these features are meteorite “finds,” it is unclear whether the APB volcanism...Eucrites Source Sample Diogenites Source Angra dos Reis D’Orbigny LEW 86010 NWA 1296 NWA 2999 NWA 4590 |  | | Journal (article/letter/editorial) | | supported by NSF grant EAR 76-01146. THE SHAW METEORITE: EVIDENCE FOR AN IGNEOUS ORIGIN J.L. Berkley...Johnson Space Center, Houston, TX 77058 The Shaw meteorite has Lgroup chondritic bulk chemistry and mineralogy...recrystallization, support an igneous origin for the Shaw meteorite. Data are presently insufficient to determine...million years in one fragment of the Dhajala meteorite have been measured. The variation of 54Mn and...indicate that the preatmospheric size of the meteorite was at least about a ton. The activity due to |  | | Journal (article/letter/editorial) | | Mineralogie 61, Rue de Buffon, Paris 53, France *Present address: Centre D'Etudes Nucleaires de Bordeaux-Gradignan...described by Noonan et al. (1972) as an un shocked meteorite. These authors noted that the metal probably cooled...with no discrimination. F. V. is an unshocked meteorite. This was considered in discarding the ubiquitous...Solar System ation yields, as observed in the Angra dos Reis achondrite (Lugmairand Marti, 1977) were used...in the phosphate separate, using a 95% purity (spinel inclusions) and a 4% correction for 238U fission |  | | Journal (article/letter/editorial) | | Ito 1950 edge: finite clusters; face: Newnham & de Haan 1962 isolated clusters edge: infinite AlrA12;...Clark 1973a Ca(Mg,Ti3 + ,Ti4+ ,AI) (Si,Alh06 Angra dos Reis fassaite (Ca,Fe2+)(Fe2+ ,Ti4+ ,Mg,Al) (Si,AI)...structure type. The magnetite structure, an inverse spinel, contains Fe3+ ions in tetra hedral A sites, and...a11980, Aldridge et al1978, Bancroft et al 1969 Angra dos Reis fassaite -+ 20,6000: FeM Ti�i -+ Ti�i...of the Ti3 + _Ti'H pyroxene from the Allende meteorite (from Mao & Bell 1974). (a) polarized spectra |  | | Journal (article/letter/editorial) | | high in white aggregates and in pinkish-white (spinel-rich) aggregates while U and Sr concentrations...matrix is less radiogenic than that of the whole meteorite, whereas lead in Ca- and Al-rich chondrules and...might correspond to the agglomeration age of the meteorite and a time of probably later disturbance, respectively...inclusions is similar to the initial ratio of the Angra dos Reis achondrite (PAPANASTASSIOU, Thesis, 1970)...in the type III carbonaceous chondrite, Pueblito de Allende. (e.g. LORD, 1965; LARIMER, 1967; LARIMER |  | | Journal (article/letter/editorial) | | mesosiderite; as well as on Acapulco, an unclassified meteorite with chondritic chemical composition and a highly...there is a new report on the Sm-Nd system in this meteorite (BROUXELand TATSUMOTO,1991 f. ~ETR~~PHY fbitira...fbitira Ibitira is a eucrite which fell in Brazil in 1957. It is composed of pyroxene (60%) and plagioclase...tridymite, and 3% phosphate. The accessory minerals are spinel, troitite, olivine, and rutile. The texture of...rate of mesosiderites. Acapulco The Acapulco meteorite, which fell in 1976, has been extensively described |  | | Journal (article/letter/editorial) | | Nous décrivons un échantillon de diopside violacé provenant du sud de l’île de Baffin, au Nunavut, dans l’Arctique...l’Arctique canadien, prélevé d’une lentille de calc-silicates et associé à marialite, pargasite, phlogopite...massifs de grains équidimensionnels. Un plan de séparation (001) est évident, mais les plans de clivage...clivage sont subtiles. Les indices de réfraction sont n␣ 1.670(1), n 1.675(1), et n␥ 1.695(1), avec 2VZ égal...n’y a aucun pléochroïsme. La densité calculée est de 3.30 g/cm3. Les paramètres réticulaires ont été déterminés |  | Marks, N.E., Borg, L.E., Hutcheon, I.D., Jacobsen, B., Clayton, R.N. (2014) Samarium–neodymium chronology and rubidium–strontium systematics of an Allende calcium–aluminum-rich inclusion with implications for 146Sm half-life. Earth and Planetary Science Letters, 405. 15-24 doi:10.1016/j.epsl.2014.08.017 | Journal (article/letter/editorial) | | Ti-rich diopside) and ∼4 vol% spinel. The core contains approximately 14 vol% spinel, 32 vol% melilite, 46 vol%...consists of radially oriented melilite crystals, with spinel content increasing inwards. The interior of the...melilite, and anorthite with included euhedral spinel. Field of view is 22 mm × 17 mm. 1.5 mm thick...thick mantle composed primarily of melilite. Spinel crystals 40–150 μm in size are included in all major phases...pyroxene and spinel; 3) the pyroxene fraction consists of pyroxene (Al, Ti-rich diopside), spinel, and perovskite |  | | Journal (article/letter/editorial) | | CaTi3+AlSiO6, a new pyroxene from the Allende meteorite Chi Ma* and GeorGe r. rossMan Division of Geological...occurs as micrometer-sized crystals along with spinel and perovskite in a melilite host in Ca-,Al-rich...Al-rich refractory inclusions from the Allende meteorite. The mean chemical composition determined by electron...Ti-rich pyroxene, refractory inclusion, Allende meteorite, carbonaceous chondrite introduCtion During a...nano-mineralogical investigation of the Allende meteorite (a CV3), Ti-rich pyroxenes were observed in Ca- |  | | Journal (article/letter/editorial) | | San Diego, La Jolla, CA 92093-0317, USA b Centre de Recherches Pe¤trographiques et Ge¤ochimiques, Rue...le's Nancy Cedex, France Ecole Nationale Supe¤rieure de Ge¤ologie, 1 Rue du Doyen Roubault, 54501 Vandoeuvre...the meteorite Angra dos Reis (ADOR) consists mainly of clinopyroxene and minor olivine and spinel, suggesting...Pu (Table 1), one computed from Nd using the Angra Dos Reis pyroxene 244 Pu/Nd ratio, and the other one...possible ways to explain this survival: (i) the meteorite crystallized from a magma very early and the 1 |  | | Journal (article/letter/editorial) | | Rubin 1997), and merrillite is found in most meteorite groups. Apatite and merrillite are the two principal...the structure of whitlockite from the Angra Dos Reis meteorite, recommended the use of merrillite for...Gopal 1975), (b) meteoritic Ca-merrillite (Angra dos Reis Achondrite; Dowty 1977), and lunar RE-merrillite...1997 Neal et al. 1990 Jolliff 1993 LAP022xx meteorite coarse-grained low-Ti basalt composite grain...pallasite (stony-iron meteorite) merrillite occurs in the silicate portion of the meteorite EMP, SIMS Davis |  | Hwang, Shyh-Lung, Shen, Pouyan, Chu, Hao-Tsu, Yui, Tzen-Fu, Varela, Maria-Euginia, Iizuka, Yoshiyuki (2019) New minerals tsangpoite Ca5(PO4)2(SiO4) and matyhite Ca9(Ca0.5□0.5)Fe(PO4)7 from the D'Orbigny angrite. Mineralogical Magazine, 83 (2) 293-313 doi:10.1180/mgm.2018.125 | Journal (article/letter/editorial) | | Sinica, Taipei, Taiwan, ROC 5 Instituto de Ciencias Astronómicas de la Tierra y del Espacio (ICATE) Avenida... were identified from the D'Orbigny angrite meteorite by electron probe microanalysis, electron microscopy...Ca-merrillite, were identified from the D'Orbigny angrite meteorite in this study. Angrites are a small group of achondritic... was reported in plutonic angrites such as Angra dos Reis (Prinz et al., 1977), LEW 86010 (Mckay et al...of synthetic merrillite or -tricalcium phosphate (de Aza et al., 1997, Mikouchi et al., 2001; Jolliff |  | | Journal (article/letter/editorial) | | late nebula. These studies have shown that all meteorite groups investigated so far have excess 53Cr relative...uncertainties at the same time when high temperature meteorite inclusions (CAI) were formed in the nebula. The...advantage is the presence in many objects of a chromite-spinel phase which has a very low Mn/Cr ratio. This permits...generating pyroxene and chromite fractions from Serra de Magé, only hand-picking was utilized. Mineral separates...eventual dissolution in HCl. To dissolve chromite (spinel) fractions we applied an HF/HNO3 mixture at elevated |
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