Multiple fluid pulses in a Samoan harzburgite
Identifieur interne : 000623 ( Main/Exploration ); précédent : 000622; suivant : 000624Multiple fluid pulses in a Samoan harzburgite
Auteurs : P. G. Burnard [Royaume-Uni] ; K. A. Farley [États-Unis] ; G. Turner [Royaume-Uni]Source :
- Chemical Geology [ 0009-2541 ] ; 1998.
Descripteurs français
- Wicri :
- geographic : Samoa.
English descriptors
- KwdEn :
Abstract
Noble gases trapped in fluid inclusions in residual mantle xenoliths from Samoa have a wide range in 4He/40Ar* which anti-correlates with enrichments in non-atmospheric Ar, Ne and Xe isotopes and with the concentration of 40Ar* trapped in the mineral. These correlations cannot be due to post-eruption loss of He from the inclusions, but are likely due to mixing of a He-depleted mantle fluid and an unfractionated, plume-derived, fluid that has entrained significant atmospheric noble gases. Mixing of the two fluids occurred within the mantle or at the base of the Samoan lithosphere. Helium loss at depth is implied.
Url:
DOI: 10.1016/S0009-2541(97)00175-7
Affiliations:
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Le document en format XML
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Burnard</name><affiliation wicri:level="4"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Earth Sciences, University of Manchester, Manchester M13 9PL</wicri:regionArea><orgName type="university">Université de Manchester</orgName><placeName><settlement type="city">Manchester</settlement><region type="nation">Angleterre</region><region nuts="2" type="region">Grand Manchester</region></placeName></affiliation></author><author><name sortKey="Farley, K A" sort="Farley, K A" uniqKey="Farley K" first="K. A." last="Farley">K. A. Farley</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Division of Geological and Planetary Sciences, MS-170-25, CalTech, Pasadena, CA 91125</wicri:regionArea><wicri:noRegion>CA 91125</wicri:noRegion></affiliation></author><author><name sortKey="Turner, G" sort="Turner, G" uniqKey="Turner G" first="G." last="Turner">G. 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These correlations cannot be due to post-eruption loss of He from the inclusions, but are likely due to mixing of a He-depleted mantle fluid and an unfractionated, plume-derived, fluid that has entrained significant atmospheric noble gases. Mixing of the two fluids occurred within the mantle or at the base of the Samoan lithosphere. Helium loss at depth is implied.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Angleterre</li><li>Grand Manchester</li></region><settlement><li>Manchester</li></settlement><orgName><li>Université de Manchester</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Burnard, P G" sort="Burnard, P G" uniqKey="Burnard P" first="P. G." last="Burnard">P. G. Burnard</name></region><name sortKey="Turner, G" sort="Turner, G" uniqKey="Turner G" first="G." last="Turner">G. Turner</name></country><country name="États-Unis"><noRegion><name sortKey="Farley, K A" sort="Farley, K A" uniqKey="Farley K" first="K. A." last="Farley">K. A. Farley</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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