untitled
<OAI-PMH schemaLocation=http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd>
<responseDate>2018-01-15T15:42:11Z</responseDate>
<request identifier=oai:HAL:hal-00404967v1 verb=GetRecord metadataPrefix=oai_dc>http://api.archives-ouvertes.fr/oai/hal/</request>
<GetRecord>
<record>
<header>
<identifier>oai:HAL:hal-00404967v1</identifier>
<datestamp>2018-01-11</datestamp>
<setSpec>type:ART</setSpec>
<setSpec>subject:sdu</setSpec>
<setSpec>collection:CNRS</setSpec>
<setSpec>collection:GM</setSpec>
<setSpec>collection:GIP-BE</setSpec>
<setSpec>collection:AGROPOLIS</setSpec>
<setSpec>collection:INSU</setSpec>
<setSpec>collection:B3ESTE</setSpec>
<setSpec>collection:UNIV-AG</setSpec>
<setSpec>collection:UNIV-MONTPELLIER</setSpec>
</header>
<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>Multiple events in the Neo-Tethyan oceanic upper mantle: Evidence from Ru-Os-Ir alloys in the Luobusa and Dongqiao ophiolitic podiform chromitites, Tibet</title>
<creator>Shi, R. D.</creator>
<creator>Alard, Olivier</creator>
<creator>Zhi, X. C.</creator>
<creator>O'Reilly, S. Y.</creator>
<creator>Pearson, N. J.</creator>
<creator>Griffin, W. L.</creator>
<creator>Zhang, M.</creator>
<creator>Chen, X. M.</creator>
<contributor>CAS Key Laboratory of Crust–Mantle Materials and Environments [Hefei] ; School of Earth and Space Sciences [Hefei] ; University of Science and Technology of China [Hefei] (USTC) - University of Science and Technology of China [Hefei] (USTC) - Chinese Academy of Sciences [Beijing] (CAS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>ARC National Key Centre for Geochemical Evolution and Metallogeny of Continents (GEMOC) ; Macquarie University</contributor>
<contributor>State Key Laboratory of Mineral Deposit Research, Nanjing University, 22 Hankou Road, Nanjing ; Université du Québec</contributor>
<source>ISSN: 0012-821X</source>
<source>Earth and Planetary Science Letters</source>
<publisher>Elsevier</publisher>
<identifier>hal-00404967</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00404967</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00404967</source>
<source>Earth and Planetary Science Letters, Elsevier, 2007, 261 (1-2), pp.33-48. 〈10.1016/j.epsl.2007.05.044〉</source>
<identifier>DOI : 10.1016/j.epsl.2007.05.044</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2007.05.044</relation>
<language>en</language>
<subject lang=en>187Os/188Os mantle composition</subject>
<subject lang=en>Ru–Os–Ir alloys</subject>
<subject lang=en>podiform chromitite</subject>
<subject lang=en>Luobusa ophiolite</subject>
<subject lang=en>Dongqiao ophiolite</subject>
<subject lang=en>Tibet</subject>
<subject>[SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>In situ analysis of major elements, platinum-group elements and Os isotope composition data for 170 grains of Ru–Os–Ir alloys from podiform chromitites in the Luobusa and Dongqiao ophiolites, Tibet, provide new constraints on the sources of the alloy grains, the Os-isotope composition of the Neo-Tethyan oceanic upper mantle, and the timing of melt–rock reactions in the ultramafic peridotites of the host ophiolites. Most alloy grains are osmiridium and iridosmine. Based on elemental and isotopic compositions, two populations can be identified. Group I, found in both ophiolite bodies, has fractionated PGE patterns typical of alloys and homogeneous 187Os/188Os 0.12645 ± 4 (2s; n = 145). Group II alloys from the Dongqiao ophiolites show smooth PGE patterns and 187Os/188Os ranges from 0.12003 to 0.12194 (yielding Re-depletion ages ≥ 1.1 Ga). Both the PGE patterns and the Os isotopic compositions of Group II resemble those of sulfides residual after melting. Group I alloys represent an early cumulate phase during the crystallization of magmas and are interpreted as derived from an asthenospheric melt. In contrast, Group II alloys are inferred to derive from the breakdown of residual sulfides from the mantle section of the ophiolite, which may represent relics of a sub-continental lithospheric mantle. The coexistence of the two groups of alloys in Dongqiao samples reflects interaction between asthenosphere-derived melts and old depleted lithospheric mantle and suggests that the chromitites originated through melt–rock reactions. The data on the Group I alloys support the hypothesis that the Re–Os evolution of the convective oceanic mantle resembles that of enstatite chondrites.</description>
<date>2007</date>
</dc>
</metadata>
</record>
</GetRecord>
</OAI-PMH>
