Rare earth elements and the petrogenesis of aubrites

Floss, C.; Strait, M. M.; Crozaz, G.

doi:10.1016/0016-7037(90)90304-4

Cited by 35 publications

(32 citation statements)

References 17 publications

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“…Oldhamites in aubrites display a variety of REE patterns, even in a given meteorite (Floss et al, 1990, Floss andCrozaz, 1993;Wheelock et al, 1994;McCoy and Dickinson, 2001). Unlike previous in-situ analyses, our procedure provides only a picture of the average sulfide in any given sample.…”

Section: Leaching Experimentsmentioning

confidence: 99%

“…It is well established that the REE budget of aubrites is largely governed by sulfides, notably oldhamite (Floss et al, 1990;Floss and Crozaz, 1993;Wheelock et al, 1994;Lodders, 1996;McCoy, 1997, McCoy andDickinson, 2001), but their contribution to the other lithophile elements is not known at present. Of course, the trace element abundances of the various sulfides could be determined in situ by ion-probe or by laser-ICP-MS, but it would require a large number of analyses.…”

Section: Evidence For Early Large-scale Melting On the Aubrite Parenmentioning

confidence: 99%

“…Because pure oldhamite melts at temperatures > 2300°C, much higher than magmatic temperatures, it was suggested that some aubritic oldhamites could be relict phases from the enstatite chondrite-like precursor material (e.g., Floss et al, 1990;Floss and Crozaz, 1993;Lodders, 1996). This hypothesis was strengthened by the observations in Norton County of significant mass independent isotopic fractionations in S (Rai et al, 2005) and large variations in neutron fluences recorded by Sm and Gd isotopic compositions (Hidaka et al, 2012), possibly associated with sulfides.…”

Section: What Can We Infer About Aubritic Parental Melts From Trace Ementioning

confidence: 99%

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The origin of aubrites: Evidence from lithophile trace element abundances and oxygen isotope compositions

Barrat

Greenwood

Keil

et al. 2016

Geochimica et Cosmochimica Acta

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Please cite this article as: Barrat, J.A., Greenwood, R.C., Keil, K., Rouget, M.L., Boesenberg, J.S., Zanda, B., Franchi, I.A., The origin of aubrites: Evidence from lithophile trace element abundances and oxygen isotope compositions, Geochimica et Cosmochimica Acta (2016), doi: http://dx.doi.org/10. 1016/j.gca.2016.07.025 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Leaching experiments were undertaken to investigate the contribution of sulfides to the whole rock 3

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Section: Leaching Experimentsmentioning

confidence: 99%

Section: Evidence For Early Large-scale Melting On the Aubrite Parenmentioning

confidence: 99%

Section: What Can We Infer About Aubritic Parental Melts From Trace Ementioning

confidence: 99%

See 1 more Smart Citation

The origin of aubrites: Evidence from lithophile trace element abundances and oxygen isotope compositions

Barrat

Greenwood

Keil

et al. 2016

Geochimica et Cosmochimica Acta

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“…An observation from enstatite chondrites was that REE became chalcophile under reducing conditions (Furst et al, 1982;Floss et al, 1990). The main goal, I believe, was to look at REE partitioning into oldhamite (CaS).…”

Section: Partitioning In Very Reducing Systemsmentioning

confidence: 99%

Thoughts and Reminiscences on Experimental Trace Element Partitioning

Jones

2016

Geochem. Persp.

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“…Among the sulfide minerals in the aubrites, oldhamite (CaS) is a particular material of interest. Oldhamite is known as a major REE carrier in the aubrites (Floss et al 1990). The variety of REE patterns found in oldhamite from aubrites is considered not to have been produced by a single igneous process (Floss et al 1990;Floss & Crozaz 1993).…”

Section: Ree Characterizationmentioning

confidence: 99%

Heterogeneous Isotopic Anomalies of Sm and Gd in the Norton County Meteorite: Evidence for Irradiation From the Active Early Sun

Hidaka

Kondo

Yoneda

2012

ApJ

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Large and heterogeneous isotopic variations of 150 Sm/ 149 Sm and 158 Gd/ 157 Gd due to neutron capture reactions caused by cosmic-ray irradiation were found in chemical and mineral separates from the Norton County meteorite. The light-colored separates, consisting mainly of enstatite (Mg 2 Si 2 O 6 ), have a very large neutron fluence of 1.98 × 10 17 n cm −2 , which is 10 times higher than that of the whole rock. Furthermore, four chemical separates showed a large variation in neutron fluences, ranging from 1.82 × 10 16 to 1.87 × 10 17 n cm −2 . The variable amounts of neutron fluences from a small single fragment of the Norton County meteorite cannot be simply explained by single-stage cosmic-ray irradiation in space. Rare earth element (REE) analyses revealed that the fractions with high neutron fluences have similar chemical properties to those in the early condensates in the solar system, showing depletions of Eu and Yb in their REE abundance patterns. The data provide evidence for an activity of the early Sun (T Tauri), suggesting the migration of early and intense irradiation materials into the Norton County meteorite's parent body.

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Rare earth elements and the petrogenesis of aubrites

Cited by 35 publications

References 17 publications

The origin of aubrites: Evidence from lithophile trace element abundances and oxygen isotope compositions

The origin of aubrites: Evidence from lithophile trace element abundances and oxygen isotope compositions

Thoughts and Reminiscences on Experimental Trace Element Partitioning

Heterogeneous Isotopic Anomalies of Sm and Gd in the Norton County Meteorite: Evidence for Irradiation From the Active Early Sun

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