Rhodium, gold and other highly siderophile element abundances in chondritic meteorites

Fischer-Gödde, M.; Becker, Harry; Wombacher, Frank

doi:10.1016/j.gca.2009.09.024

Cited by 195 publications

(181 citation statements)

References 108 publications

(215 reference statements)

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“…All chondrite groups and iron meteorites show deficits in 182 W relative to the BSE, so any late veneer would have added 182 W-depleted material to the BSE. Based on available W concentration and 182 W data (Yin et al, 2002;Kleine et al, 2004;Kleine et al, 2008;McCoy et al, 2011;Kruijer et al, 2014) and HSE data from the same samples (Table S3) (Horan et al, 2003;Fischer-Gödde et al, 2010), we calculate that subtracting an ordinary, enstatite or carbonaceous chondrite-like late veneer fraction not present in Isua's source (i.e., ~35-50%) from the present-day BSE composition would produce ε 182 W excesses for Isua of +0.04 0.02 -…”

Section: A Partial Late Veneer In the Isua Sourcementioning

confidence: 99%

Highly siderophile element and 182 W evidence for a partial late veneer in the source of 3.8 Ga rocks from Isua, Greenland

Dale

Kruijer

Burton

2017

Earth and Planetary Science Letters

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. was added. In this case, the Isua source can represent ambient mantle after the giant moonforming impact, into which only a part of Earth's full late veneer was mixed, rather than an isotopically distinct mantle domain produced by early differentiation, which would probably require survival through the giant Moon-forming impact.3

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Section: A Partial Late Veneer In the Isua Sourcementioning

confidence: 99%

Highly siderophile element and 182 W evidence for a partial late veneer in the source of 3.8 Ga rocks from Isua, Greenland

Dale

Kruijer

Burton

2017

Earth and Planetary Science Letters

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“…Projections of mantle data to primitive, undepleted compositions provide strong evidence that the Re/Os of the BSE is within the very limited range of ratios defined by chondritic meteorites [3,20]. As discussed below, this provides an important constraint on the origin of HSE in the mantle.…”

Section: Introductionmentioning

confidence: 87%

“…The siderophile elements comprise the highly siderophile elements (HSE; including Re, Os, Ir, Ru, Pt, Rh, Au and Pd), a suite of elements characterized by low-pressure metal-silicate distribution coefficients of more than 10 4 , and the moderately siderophile elements (MSE; including W, Co, Ag, Ni, Ge and Mo), with low-pressure metal-silicate partition coefficients Abundances of MSE and HSE normalized to C1 chondrites. HSE data for chondrites and BSE are from compilations reported by Fischer-Gödde et al [3,4]. The abundances present in the BSE of most MSE are from [1].…”

Section: Introductionmentioning

confidence: 99%

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Siderophile element constraints on the origin of the Moon

Walker

2014

Phil. Trans. R. Soc. A.

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Discovery of small enrichments in 182 W/ 184 W in some Archaean rocks, relative to modern mantle, suggests both exogeneous and endogenous modifications to highly siderophile element (HSE) and moderately siderophile element abundances in the terrestrial mantle. Collectively, these isotopic enrichments suggest the formation of chemically fractionated reservoirs in the terrestrial mantle that survived the putative Moon-forming giant impact, and also provide support for the late accretion hypothesis. The lunar mantle sources of volcanic glasses and basalts were depleted in HSEs relative to the terrestrial mantle by at least a factor of 20. The most likely explanations for the disparity between the Earth and Moon are either that the Moon received a disproportionately lower share of late accreted materials than the Earth, such as may have resulted from stochastic late accretion, or the major phase of late accretion occurred prior to the Moon-forming event, and the putative giant impact led to little drawdown of HSEs to the Earth's core. High precision determination of the 182 W isotopic composition of the Moon can help to resolve this issue.

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“…4a-c (McDonald et al, 2001;Tagle and Claeys, 2005;Tagle et al, 2007) and compared with the mean ratios of the different types of meteorites, compiled in siderophile element databases (e.g. McDonald et al, 2001;Tagle and Berlin, 2008;Tagle et al, 2009;Fischer-Gödde et al, 2010). Where absolute concentrations of siderophile elements show large variations in the proportion of metals in a given aliquot (both in impactites and meteorites), element ratios are more reproducible (e.g.…”

Section: Impact Structurementioning

confidence: 99%