Experimental studies of metal–silicate partitioning of Sb: Implications for the terrestrial and lunar mantles

Righter, K.; Humayun, M.; Campbell, A. J.; Danielson, L. R.; Hill, D. H.; Drake, M. J.

doi:10.1016/j.gca.2008.11.042

Cited by 24 publications

(24 citation statements)

References 88 publications

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“…After normalization of the metal-silicate partition coefficients of S, Se, and Te to the FeO content of the lunar mantle of ~11 wt% 3 , we observe that sulfur enhances the siderophile behavior of Se and Te, consistent with their known chalcophile tendencies. In contrast, assuming 3+ as the dominant valence state of Sb in the silicate melt 17 , the preferential partitioning of Sb in metal is found to decrease significantly with increasing S in the metal. The siderophile behavior of S, Se, and Te increases dramatically with increasing pressure (Fig.…”

Section: Resultsmentioning

confidence: 62%

“…We obtained new experimental data for S, Se, Te, and Sb partitioning between (Fe,Ni) metal, FeS sulfide and silicate melts (Methods summary) to complement existing data focused on their behavior in the Earth 15 – 17 . A total of 33 experiments using synthetic metal-silicate mixtures doped with the four volatile elements were performed in a piston cylinder press using MgO capsules at temperatures between 1500 to 1600 °C and pressures from 1 to 2.5 GPa, under redox conditions of 2 to 1 log units below the iron-wüstite buffer (ΔIW) using two silicate melt compositions (Supplementary Information).…”

Section: Resultsmentioning

confidence: 99%

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The lunar core can be a major reservoir for volatile elements S, Se, Te and Sb

Steenstra

Lin

Dankers

et al. 2017

Sci Rep

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The Moon bears a striking compositional and isotopic resemblance to the bulk silicate Earth (BSE) for many elements, but is considered highly depleted in many volatile elements compared to BSE due to high-temperature volatile loss from Moon-forming materials in the Moon-forming giant impact and/or due to evaporative loss during subsequent magmatism on the Moon. Here, we use high-pressure metal-silicate partitioning experiments to show that the observed low concentrations of volatile elements sulfur (S), selenium (Se), tellurium (Te), and antimony (Sb) in the silicate Moon can instead reflect core-mantle equilibration in a largely to fully molten Moon. When incorporating the core as a reservoir for these elements, their bulk Moon concentrations are similar to those in the present-day bulk silicate Earth. This suggests that Moon formation was not accompanied by major loss of S, Se, Te, Sb from Moon-forming materials, consistent with recent indications from lunar carbon and S isotopic compositions of primitive lunar materials. This is in marked contrast with the losses of other volatile elements (e.g., K, Zn) during the Moon-forming event. This discrepancy may be related to distinctly different cosmochemical behavior of S, Se, Te and Sb within the proto-lunar disk, which is as of yet virtually unconstrained.

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Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

The lunar core can be a major reservoir for volatile elements S, Se, Te and Sb

Steenstra

Lin

Dankers

et al. 2017

Sci Rep

View full text Add to dashboard Cite

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“…; Righter et al. ). Traditional statistical tests such as r 2 (coefficient of determination), t values, P values, and F statistics are used to evaluate and ensure the quality of all the regressions and the significance of each term ( a through h ; Table ).…”

Section: Discussionmentioning

confidence: 97%

“…First, the effect of Fe‐Ni alloys on the activity of Sb in metallic liquids is calculated as outlined in Righter et al. (). And second, for As and Sb, there is a strong dependence of partitioning of the S content of the silicate melt.…”

Section: Discussionmentioning

confidence: 99%

Siderophile and chalcophile element abundances in shergottites: Implications for Martian core formation

Yang

Humayun

Righter

et al. 2015

Meteorit & Planetary Scien

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Elemental abundances for volatile siderophile and chalcophile elements for Mars inform us about processes of accretion and core formation. Such data are few for Martian meteorites, and are often lacking in the growing number of desert finds. In this study, we employed laser ablation inductively coupled plasma–mass spectrometry (LA‐ICP‐MS) to analyze polished slabs of 15 Martian meteorites for the abundances of about 70 elements. This technique has high sensitivity, excellent precision, and is generally accurate as determined by comparisons of elements for which literature abundances are known. However, in some meteorites, the analyzed surface is not representative of the bulk composition due to the over‐ or underrepresentation of a key host mineral, e.g., phosphate for rare earth elements (REE). For other meteorites, the range of variation in bulk rastered analyses of REE is within the range of variation reported among bulk REE analyses in the literature. An unexpected benefit has been the determination of the abundances of Ir and Os with a precision and accuracy comparable to the isotope dilution technique. Overall, the speed and small sample consumption afforded by this technique makes it an important tool widely applicable to small or rare meteorites for which a polished sample was prepared. The new volatile siderophile and chalcophile element abundances have been employed to determine Ge and Sb abundances, and revise Zn, As, and Bi abundances for the Martian mantle. The new estimates of Martian mantle composition support core formation at intermediate pressures (14 ± 3 GPa) in a magma ocean on Mars.

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“…Models aimed at understanding core formation on the Earth are based heavily on the metal-silicate partitioning behavior of siderophile trace elements (Li and Agee 1996;Righter andDrake 1997, 1999;Gessmann and Rubie 2000;Chabot et al 2005;Wade and Wood 2005;Cottrell and Walker 2006;Kegler et al 2008;Wood et al 2008;Cottrell et al 2009;Righter et al 2009Righter et al , 2011Righter 2011;Wade et al 2012;Walter and Cottrell 2013). Some of the earlier models were based largely on Ni and Co (Li and Agee 1996;), but subsequent models (referenced above) have also included Mn, V, Cr, Mo, W, Cu, Ga, Pd, Sn, Sb, Ge, Pt, and Re.…”

Section: Implications Differentiationmentioning

confidence: 99%

The effect of oxygen as a light element in metallic liquids on partitioning behavior

Chabot

Wollack

Humayun

et al. 2014

Meteorit & Planetary Scien

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Oxygen has been considered a potentially important light element in metallic liquids during a range of planetary processes, yet the influence of O in a metallic melt on element partitioning behavior is largely unknown. To investigate the effect of O in such systems, we conducted experiments in the Fe-S-O system, doped with 25 trace elements, which produced two immiscible metallic liquids. Our results indicate that the presence of O in the metallic liquid produces a distinctive chemical signature for W and Ga in particular. Tungsten shows an affinity for O in the metallic liquid and partitions more strongly into the metallic melt in the presence of O. The partitioning of Ga is relatively constant despite the presence of O, which is in contrast to the majority of the other siderophile elements in the study. Our experiments from 1400 to 1600°C show no significant effect from temperature on the partitioning behavior of any trace elements over this limited temperature range. This distinctive chemical signature due to the presence of O in the metallic liquid has potential implications for modeling core formation, evaluating isotopic signatures produced by core crystallization, and interpreting chemical assemblages observed in meteorites.

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Experimental studies of metal–silicate partitioning of Sb: Implications for the terrestrial and lunar mantles

Cited by 24 publications

References 88 publications

The lunar core can be a major reservoir for volatile elements S, Se, Te and Sb

The lunar core can be a major reservoir for volatile elements S, Se, Te and Sb

Siderophile and chalcophile element abundances in shergottites: Implications for Martian core formation

The effect of oxygen as a light element in metallic liquids on partitioning behavior

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