 | Göpel, Christa, Birck, Jean-Louis, Galy, Albert, Barrat, Jean-Alix, Zanda, Brigitte (2015) Mn–Cr systematics in primitive meteorites: Insights from mineral separation and partial dissolution. Geochimica et Cosmochimica Acta, 156. 1-24 doi:10.1016/j.gca.2015.02.008 | Journal (article/letter/editorial) | | measured on carbonaceous chondrites (CC): Tafassasset, Paris, Niger I, NWA 5958, NWA 8157 and Jbilet Winselwan...respectively. The internal Mn/Cr systematics in Tafassasset and Paris were studied by two approaches: leaching...mineral separates as well as the leachates of Tafassasset fall on a common isochron indicating that (1)...two H4 meteorites with the U–Pb age of the same meteorite (Göpel et al., 1994) would imply a canonical...two recently discovered primitive meteorites (Tafassasset and Paris) as well as bulk rock data obtained |  | Gardner-Vandy, Kathryn G., Lauretta, Dante S., Greenwood, Richard C., McCoy, Timothy J., Killgore, Marvin, Franchi, Ian A. (2012) The Tafassasset primitive achondrite: Insights into initial stages of planetary differentiation. Geochimica et Cosmochimica Acta, 85. 142-159 doi:10.1016/j.gca.2012.01.014 | Journal (article/letter/editorial) | | (2012) 142–159 www.elsevier.com/locate/gca The Tafassasset primitive achondrite: Insights into initial stages...Washington, DC 20013, United States d Southwest Meteorite Laboratory, Payson, AZ 85547, United States b...online 2 February 2012 Abstract Tafassasset is an exceptional meteorite that has been linked to both the...geochemistry, and formation history of the meteorite. Tafassasset is predominantly FeO-rich olivine (58%)...chondritic in bulk composition. Different stones of the meteorite have slightly different oxygen isotope composition |  | Breton, Thomas, Quitté, Ghylaine, Toplis, Michael J., Monnereau, Marc, Birck, Jean-Louis, Göpel, Christa, Charles, Cyril (2015) Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body. Earth and Planetary Science Letters, 425. 193-203 doi:10.1016/j.epsl.2015.06.002 | Journal (article/letter/editorial) | | Science Letters www.elsevier.com/locate/epsl Tafassasset: Evidence of early incipient differentiation...metal-rich chondrite a b s t r a c t Tafassasset is a primitive meteorite, the origin of which is still debated...fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show...presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184 W. After correction of...Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parentbody less than |  | | Journal (article/letter/editorial) | | 12292 Correlated accretion ages and e54Cr of meteorite parent bodies and the evolution of the solar nebula...canonical value of 5.2 9 105. In cases of iron meteorite parent bodies, achondrite parent bodies, and...age: the oldest accretion ages (1 0.5 Ma) are for iron and certain other differentiated meteorites with...outliers (notably Northwest Africa [NWA] 011 and Tafassasset), we feel that the correlation is significant...e54Cr. INTRODUCTION Accretion of planetesimals/meteorite parent bodies is the first step of the evolution |  | | Journal (article/letter/editorial) | | 88763, Northwest Africa (NWA) 6693 and NWA 6704, Tafassasset, NWA 011/1296, and the oligoclaserich meteorites...explains the otherwise enigmatic nature of some iron meteorite groups (e.g., IVA, IVB) that require segregation...early-formed asteroids and now encompass a range of meteorite classes, including winonaites (Benedix et al....88763 (Swindle et al., 1998; Day et al., 2015), Tafassasset (Gardner-Vandy et al., 2012), Northwest Africa...al., 2013), NWA 6704 (Hibaya et al., 2018), Tafassasset (Gardner-Vandy et al., 2012) and LEW 88763 (Swindle |  | | Journal (article/letter/editorial) | | Goethite (#-FeOOH), an abundant and highly reactive iron oxyhydroxide mineral phase found in soils and sediments...H2). Sulfate (Desulforegula, Desulfovibrio) and iron (Geobacter) reducers predominated and presumably...Goldschmidt Conference Abstracts 2010 Observing iron redox dynamics at the nanosecond scale with time-resolved...dissolution of iron oxide and oxyhydroxides, a central process in the biogeochemical cycling of iron. In this...transfer leads to the formation of structural ferrous iron that may be released into solution or futher react |  | | Book | | LL3.0 chondrite, constructed from magnesium and iron Ka x-ray maps provided by Denton S. Ebel of the...almost free of iron, and appear red. Type II chondrules are composed of magnesium and iron silicates and...fine-grained iron-rich matrix between chondrules is light blue in color, and metal and iron sulfides appear...it, it was just at this time that the Allende meteorite fell and the minerals contained within the so-called...Silliman Chair and being curator of the Yale meteorite collection. In a continuation of Karl’s foray |  | | Journal (article/letter/editorial) | | University, Sapporo, 001-0021, Japan, 3Antarctic Meteorite Research Center, National Institute of Polar Research...to one of the most primitive meteorites. This meteorite contains highly abundance of presolar grains [1]...Meeting of the Meteoritical Society: Abstracts 5177 IRON SULFIDE FORMATION IN ASTROPHYSICAL ENVIRONMENTS:...anticipated [6]. [6] observed that Fe,Ni metal in this meteorite was invariably and extensively altered to form...moderately altered CR2 chondrites Renazzo [1, 2]. Iron contents are comparable to weakly altered CR2 chondrites |  | | Book | | and silicon burning to proceed. Collapse of an iron core devoid of further nuclear energy then gives...and (iv) the abundance peaks in the region past iron at the neutron closed shell positions (zirconium...oxygen, and silicon burning, until finally a core of iron is produced, from which no more energy can be extracted...25M( from birth as hydrogen burning stars until iron core collapse (Table 1). In general, the trajectories...T 9). When the star has built up a large-enough iron core, exceeding its effective Chandrasekhar mass | | | Book | | and silicon burning to proceed. Collapse of an iron core devoid of further nuclear energy then gives...and (iv) the abundance peaks in the region past iron at the neutron closed shell positions (zirconium...oxygen, and silicon burning, until finally a core of iron is produced, from which no more energy can be extracted...25M( from birth as hydrogen burning stars until iron core collapse (Table 1). In general, the trajectories...T 9). When the star has built up a large-enough iron core, exceeding its effective Chandrasekhar mass |
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