Xenon and Argon: A contrasting behavior in olivine at depth

Sanloup, C.; Schmidt, Burkhard; Guðfinnsson, Guðmundur H.; Dewaele, Agnès; Mézouar, M.

doi:10.1016/j.gca.2011.08.023

Cited by 26 publications

(26 citation statements)

References 81 publications

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“…On the other hand, if noble gases were to have higher silicate solid/liquid partition coefficients at high pressure (e.g., Xe: Sanloup et al . []), they could be stored in silicate phases rather than Fe‐Ni‐S liquids. In this scenario, the droplet occurrence would only have acted as a physical mechanism to isolate the LLSVP from whole mantle convection (through a density increase) but not as the host of the noble gases (especially Xe).…”

Section: Consistency With Geochemical Observationsmentioning

confidence: 99%

“…On the one hand, if helium is preferentially partitioned into Fe-Ni-S liquid, the Fe-Ni-S liquid could potentially store significant primordial noble gases compared with silicate crystals [Heber et al, 2007;Bouhifd et al, 2013;Huang et al, 2014]. On the other hand, if noble gases were to have higher silicate solid/liquid partition coefficients at high pressure (e.g., Xe: Sanloup et al [2011]), they could be stored in silicate phases rather than Fe-Ni-S liquids. In this scenario, the droplet occurrence would only have acted as a physical mechanism to isolate the LLSVP from whole mantle convection (through a density increase) but not as the host of the noble gases (especially Xe).…”

Section: Consistency With Geochemical Observationsmentioning

confidence: 99%

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Primordial metallic melt in the deep mantle

Zhang

Dorfman

Labidi

et al. 2016

Geophysical Research Letters

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Seismic tomography models reveal two large low shear velocity provinces (LLSVPs) that identify large‐scale variations in temperature and composition in the deep mantle. Other characteristics include elevated density, elevated bulk sound speed, and sharp boundaries. We show that properties of LLSVPs can be explained by the presence of small quantities (0.3–3%) of suspended, dense Fe‐Ni‐S liquid. Trapping of metallic liquid is demonstrated to be likely during the crystallization of a dense basal magma ocean, and retention of such melts is consistent with currently available experimental constraints. Calculated seismic velocities and densities of lower mantle material containing low‐abundance metallic liquids match the observed LLSVP properties. Small quantities of metallic liquids trapped at depth provide a natural explanation for primitive noble gas signatures in plume‐related magmas. Our model hence provides a mechanism for generating large‐scale chemical heterogeneities in Earth's early history and makes clear predictions for future tests of our hypothesis.

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Section: Consistency With Geochemical Observationsmentioning

confidence: 99%

Section: Consistency With Geochemical Observationsmentioning

confidence: 99%

Primordial metallic melt in the deep mantle

Zhang

Dorfman

Labidi

et al. 2016

Geophysical Research Letters

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“…Ren e Bès, 1,2,a) Philippe Martin, 1,b) Emerson Vathonne, 1 R emy Delorme, 1 Catherine Sabathier, 1 Michel Freyss,1 We report here the direct experimental observation of the preferential xenon incorporation site in uranium dioxide and analyse how its incorporation evolves with the annealing temperature. We show that High Energy Resolution Fluorescence Detection X-ray Absorption Near Edge Structure in combination with first-principles calculations enable a precise determination of the Xe incorporation site.…”

Section: Experimental Evidence Of Xe Incorporation In Schottky Defectmentioning

confidence: 99%

Experimental evidence of Xe incorporation in Schottky defects in UO2

Bès

Martin²,

Vathonne³

et al. 2015

Applied Physics Letters

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“…Assuming equal degassing efficiencies for all noble gases means that the atmospheric inventories of 36+38 Ar, Kr, and Xe may be only 50% of the total BSE inventories. Sanloup et al (2005Sanloup et al ( , 2011 suggested that at high pressure XeO 2 can substitute for SiO 2 in quartz and to lesser extent into olivine. Their proposals remain speculative although Brock and Schrobilgen (2011) synthesized XeO 2 .…”

Section: Secondary Origin Of Earth's Atmospherementioning

confidence: 99%