Equilibrium high-temperature Fe isotope fractionation between fayalite and magnetite: An experimental calibration

Shahar, Anat; Young, Edward; Manning, Craig E.

doi:10.1016/j.epsl.2008.01.026

Cited by 144 publications

(102 citation statements)

References 25 publications

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“…Dominion Reef pyrite and chalcopyrite from underlying and overlying rocks display a relatively small range of δ 56 Fe values, which is within the range of igneous δ 56 Fe values in mantle-derived rocks, including bulk rocks and mineral separates (Poitrasson and Freydier, 2005;Heimann et al, 2008;Teng et al, 2008;Schoenberg et al, 2009). This range is also consistent with experimental studies of Fe isotope fractionation at magmatic temperatures (Shuessler et al, 2007;Shahar et al, 2008).…”

Section: Crustal Origin Of Dominion Reef Pyritesupporting

confidence: 91%

Multiple sulphur and iron isotope composition of detrital pyrite in Archaean sedimentary rocks: A new tool for provenance analysis

Hofmann

Bekker

Rouxel

et al. 2009

Earth and Planetary Science Letters

114

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Multiple S (δ 34 S and δ 33 S) and Fe (δ 56 Fe) isotope analyses of rounded pyrite grains from 3.1 to 2.6 Ga conglomerates of southern Africa indicate their detrital origin, which supports anoxic surface conditions in the Archaean. Rounded pyrites from Meso-to Neoarchaean gold and uranium-bearing strata of South Africa are derived from both crustal and sedimentary sources, the latter being characterised by non-mass dependent fractionation of S isotopes

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Section: Crustal Origin Of Dominion Reef Pyritesupporting

confidence: 91%

Multiple sulphur and iron isotope composition of detrital pyrite in Archaean sedimentary rocks: A new tool for provenance analysis

Hofmann

Bekker

Rouxel

et al. 2009

Earth and Planetary Science Letters

114

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“…Matsuhisa, 1979;Matthews et al, 1983a,b). More recently, three studies applied this method to the Fe isotope systematics: between oxide and silicate phases at high temperature (Shahar et al, 2008), between chloro-complexes in aqueous solutions (Hill and Schauble, 2008), and between Fe(II) aq and goethite (Beard et al, 2010).…”

Section: The Three Isotope Methodsmentioning

confidence: 99%

Fe isotope exchange between Fe(II)aq and nanoparticulate mackinawite (FeSm) during nanoparticle growth

Guilbaud

Butler

Ellam

et al. 2010

Earth and Planetary Science Letters

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“…During partial melting, Fe(III) is more incompatible in olivine and pyroxene than Fe(II) is. Both theoretical calculations and experimental determinations show that Fe(III)-bearing phases tend to be enriched in the heavy isotopes of iron compared to Fe(II)-bearing phases (Polyakov and Mineev, 2000;Schauble et al, 2001;Schuessler et al, 2007;Shahar et al, 2008). Such equilibrium isotope fractionation between Fe(III) and Fe(II) may explain, at least in part, the heavy iron isotope composition of MORBs and OIBs relative to that of chondrites and other planetary basalts (Dauphas et al, 2009a).…”

Section: Introductionmentioning

confidence: 96%

Iron isotope fractionation in planetary crusts

Wang

Moynier

Dauphas

et al. 2012

Geochimica et Cosmochimica Acta

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We present new high precision iron isotope data (d 56 Fe vs. IRMM-014 in per mil) for four groups of achondrites: one lunar meteorite, 11 martian meteorites, 32 howardite-eucrite-diogenite meteorites (HEDs), and eight angrites. Angrite meteorites are the only planetary materials, other than Earth/Moon system, significantly enriched in the heavy isotopes of Fe compared to chondrites (by an average of +0.12& in d 56 Fe). While the reason for such fractionation is not completely understood, it might be related to isotopic fractionation by volatilization during accretion or more likely magmatic differentiation in the angrite parent-body. We also report precise data on martian and HED meteorites, yielding an average d 56 Fe of 0.00 ± 0.01&. Stannern-trend eucrites are isotopically heavier by +0.05& in d 56 Fe than other eucrites. We show that this difference can be ascribed to the enrichment of heavy iron isotopes in ilmenite during igneous differentiation. Preferential dissolution of isotopically heavy ilmenite during remelting of eucritic crust could have generated the heavy iron isotope composition of Stannern-trend eucrites. This supports the view that Stannern-trend eucrites are derived from main-group eucrite source magma by assimilation of previously formed asteroidal crust.These new results show that iron isotopes are not only fractionated in terrestrial and lunar basalts, but also in two other differentiated planetary crusts. We suggest that igneous processes might be responsible for the iron isotope variations documented in planetary crusts.

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Equilibrium high-temperature Fe isotope fractionation between fayalite and magnetite: An experimental calibration

Abstract: The iron isotopic fractionation factor between magnetite and fayalite was measured at high temperature in a piston-cylinder apparatus. For the first time, the three-isotope method [

Cited by 144 publications

References 25 publications

Multiple sulphur and iron isotope composition of detrital pyrite in Archaean sedimentary rocks: A new tool for provenance analysis

Multiple sulphur and iron isotope composition of detrital pyrite in Archaean sedimentary rocks: A new tool for provenance analysis

Fe isotope exchange between Fe(II)aq and nanoparticulate mackinawite (FeSm) during nanoparticle growth

Iron isotope fractionation in planetary crusts

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