The chemical classification of iron meteorites—V groups IIIC and IIID and other irons with germanium concentrations between 1 and 25 ppm

Wasson, J. T.; Schaudy, R.

doi:10.1016/0019-1035(71)90102-3

Cited by 60 publications

(30 citation statements)

References 16 publications

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“…Iron meteorites exhibit a large range in Ni concentrations, both for the magmatic and nonmagmatic groups as well as for ungrouped irons. The vast majority of iron meteorite compositional data are from an ongoing series of papers by J. T. Wasson and colleagues (Wasson 1967(Wasson , 1969(Wasson , 1970Wasson and Kimberlin 1967;Wasson and Schaudy 1971;Schaudy et al 1972;Scott et al 1973;Scott and Wasson 1976;Kracher et al 1980;Malvin et al 1984;Wasson et al 1989Wasson et al , 1998. Additional iron meteorite compositional studies are listed in the recent review of Haack and McCoy (2003).…”

Section: Experimental and Analytical Methodsmentioning

confidence: 99%

The effect of Ni on element partitioning during iron meteorite crystallization

Chabot

Saslow

McDonough

et al. 2007

Meteorit & Planetary Scien

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Abstract-Iron meteorites exhibit a large range in Ni concentrations, from only 4% to nearly 60%. Most previous experiments aimed at understanding the crystallization of iron meteorites have been conducted in systems with about 10% Ni or less. We performed solid metal/liquid metal experiments to determine the effect of Ni on partition coefficients for 20 trace elements pertinent to iron meteorites. Experiments were conducted in both the end-member Ni-S system as well as in the Fe-Ni-S system with intermediate Ni compositions applicable to high-Ni iron meteorites. The Ni content of the system affects solid metal/liquid metal partitioning behavior. For a given S concentration, partition coefficients in the Ni-S system can be over an order of magnitude larger than in the Fe-S system. However, for compositions relevant to even the most Ni-rich iron meteorites, the effect of Ni on partitioning behavior is minor, amounting to less than a factor of two for the majority of trace elements studied. Any effect of Ni also appears minor when it is compared to the large influence S has on element partitioning behavior. Thus, we conclude that in the presence of an evolving S-bearing metallic melt, crystallization models can safely neglect effects from Ni when considering the full range of iron meteorite compositions.

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Section: Experimental and Analytical Methodsmentioning

confidence: 99%

The effect of Ni on element partitioning during iron meteorite crystallization

Chabot

Saslow

McDonough

et al. 2007

Meteorit & Planetary Scien

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“… Plots of Ga versus Ni (A) and Ir versus Ni (B) showing the composition of the “iron man” meteorite relative to other known grouped, ungrouped, and anomalous Ni‐rich iron meteorites. The Ni, Ir, and Ga data are compiled from Wasson (1969, 1970, 2000), Schaudy and Wasson (1971), Wasson and Schaudy (1971), Schaudy et al. (1972), Scott et al.…”

Section: Discussionmentioning

confidence: 99%

Buddha from space—An ancient object of art made of a Chinga iron meteorite fragment*

Buchner

Schmieder

Kurat

et al. 2012

Meteorit & Planetary Scien

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Abstract-The fall of meteorites has been interpreted as divine messages by multitudinous cultures since prehistoric times, and meteorites are still adored as heavenly bodies. Stony meteorites were used to carve birds and other works of art; jewelry and knifes were produced of meteoritic iron for instance by the Inuit society. We here present an approximately 10.6 kg Buddhist sculpture (the ''iron man'') made of an iron meteorite, which represents a particularity in religious art and meteorite science. The specific contents of the crucial main (Fe, Ni, Co) and trace (Cr, Ga, Ge) elements indicate an ataxitic iron meteorite with high Ni contents (approximately 16 wt%) and Co (approximately 0.6 wt%) that was used to produce the artifact. In addition, the platinum group elements (PGEs), as well as the internal PGE ratios, exhibit a meteoritic signature. The geochemical data of the meteorite generally match the element values known from fragments of the Chinga ataxite (ungrouped iron) meteorite strewn field discovered in 1913. The provenance of the meteorite as well as of the piece of art strongly points to the border region of eastern Siberia and Mongolia, accordingly. The sculpture possibly portrays the Buddhist god Vais´ravana and might originate in the Bon culture of the eleventh century. However, the ethnological and art historical details of the ''iron man'' sculpture, as well as the timing of the sculpturing, currently remain speculative.

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“…These meteorites are classified as anomalous as they do not belong to either the IV A or IVB clusters based on Ga, Ge, and Ni [see Schaudy eta/. 1972;Wasson and Schaudy, 1971]. All of these samples plot to the right of the Gibeon reference isochron.…”

Section: Pd-ag Systematicsmentioning

confidence: 99%

“…Wasson and colleagues [Wasson, 1967;Wasson and Kimberlin, 1967;Wasson, 1969Wasson, , 1970aWasson and Schaudy, 1971;Schaudy eta/., 1972;Scott eta/., 1973;Scott and Wasson, 1975;Kracher eta/. 1980;Malvin eta/.…”

Section: The Cosmochemistry Of Pd and Ag And The Formation Of Iron Meunclassified

Live¹⁰⁷Pd in the Early Solar System and Implications for Planetary Evolution

Chen

Wasserburg

2013

Earth Processes: Reading the Isotopic Code

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We present a report on the status of 107 Pd (>r = 9.4 x 10 6 y) in the early solar system and the implications of its presence for protoplanet evolution. Over the last two decades we have carried out an extensive search for the evidence of presently extinct 107 Pd in meteorites. From these results we conclude that: 1) 107 Ag* (excess 107 Ag) is present in a wide variety of iron and stony-iron meteorites; 2) 107 Ag* is due to the in situ decay of 107 Pd in these meteorites; 3) Pd-Ag metal-PeS and metal whole-rock isochrons have been established for a few meteorites; 4) the correlation observed for the total metal isochrons reflects a large variation in normal silver contents ( -1 0 3 ) with much small variations in Pd contents (factors of 10); 5) there is a wide range in apparent Major fractionation between PdfAg can only be achieved during condensation, early accretion, and metal segregation in the solar nebula. The reaction ofFeNi with H 2 S gas to form PeS and subsequent melting and segregation ofFeNi and PeS provides a mechanism for minor (x2) fractionation. For some volatile-depleted meteorites, the processes of condensation ofFeNi with isolation from later condensates effectively fractionated PdfAg and produced metal with a 108 Pdf 109 Ag -10 4 -10 5 . For other meteorites not so extensively depleted in volatiles, a smaller degree of effective Pdf Ag fractionation is produced due to the presence of later condensates which, upon planetary melting, produced metal with a 108 Pdf 109 Ag-50-100. Some fractionation ofPd and Ag occurred by metal-liquid, metal-crystal fractionation during crystallization in planets similar to the models of Scott [1972], Larimer and Anders [1967], and Wai and Wasson [1977]. If the variation in initial 107 Pdf 108Pd among meteorites indicates a time difference (AT) in the condensation and melting-segregation of planetesimals, the data indicate a total range of -12 my for many meteorites. This tight cluster includes samples ofthe IIAB, IIIAB, IVA, IVB, and "anomalous" groups, as well as mesosiderites and pallasites. However, some meteorites exhibit no evidence of

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The chemical classification of iron meteorites—V groups IIIC and IIID and other irons with germanium concentrations between 1 and 25 ppm

Cited by 60 publications

References 16 publications

The effect of Ni on element partitioning during iron meteorite crystallization

The effect of Ni on element partitioning during iron meteorite crystallization

Buddha from space—An ancient object of art made of a Chinga iron meteorite fragment*

Live¹⁰⁷Pd in the Early Solar System and Implications for Planetary Evolution

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The chemical classification of iron meteorites—V groups IIIC and IIID and other irons with germanium concentrations between 1 and 25 ppm

Cited by 60 publications

References 16 publications

The effect of Ni on element partitioning during iron meteorite crystallization

The effect of Ni on element partitioning during iron meteorite crystallization

Buddha from space—An ancient object of art made of a Chinga iron meteorite fragment*

Live107Pd in the Early Solar System and Implications for Planetary Evolution

Contact Info

Product

Resources

About

Live¹⁰⁷Pd in the Early Solar System and Implications for Planetary Evolution