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Ubiquitous old depleted mantle in the oceanic mantle

Olivier AlardYoann GréauAmbre,LuguetJean-Pierre LorandMarguerite GodardWilliam L. GriffinSuzanne Y. O’Reilly

GEMOC,Dept. Earth & Planetary Sciences,Macquarie University,Sydney,Australia Lab. Tectonophysique,CNRS UMR5569,Universite de Montpellier Ⅱ,France.Dept. of Earth Sciences,University of Durham,UK.Muséum National d’Histoire Naturelle de Paris,CNRS,France

摘要:<正>Abyssal peridotites (AP) are believed to be the residue of recent partial melting of the MORB source mantle. Thus their petrologic and geochemical characteristics have been interpreted within the framework of recent melting of a fertile convective mantle. However, a number of studies have shown that the "magmatic" history of AP are much complex and record multiple episodes of melt percolation/reaction. Recent isotopic data (e.g. Re-Os) have prompted doubts on whether AP are direct residues of recent MORB melting. Magmatic sulfides are the main carrier of highly siderophile elements (HSE) in the mantle, including Os
会议名称:

International Conference on Continental Volcanism

会议时间:

2006-05

会议地点:

中国广东广州

  • 专辑:

    基础科学

  • 专题:

    地质学

  • 分类号:

    P588.125

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