Origin of high-Cr chromite deposits in nascent mantle wedges: Petrological and geochemical constraints from the Neo-Tethyan Luobusa ophiolite, Tibet
Ore Geology Reviews(2020)
摘要
•Ophiolitic peridotites are not melting residues but reaction products with melts.•The Luobusa mantle wedge was hydrated first and extensively refertilized later.•Ophiolitic high-Cr chromitites have high-Ca boninitic to arc picritic affinities.•Mantle rocks of forearc ophiolites keep useful record of subduction initiation.
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关键词
Luobusa ophiolite,high-Cr chromitites,Mantle sequence,Refertilization,Magmatism,Subduction initiation
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