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Rare earth element redistribution during high-pressure–low-temperature metamorphism in ophiolitic Fe-gabbros (Liguria, northwestern Italy): Implications for light REE mobility in subduction zones
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1996
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Northwestern ItalyEngineeringItaly SearchVia Ferrata 1Earth ScienceMetamorphic ProcessHigh-pressure–low-temperature MetamorphismMetamorphic PetrologyHigh Temperature GeochemistryGeochronologyIgneous PetrogenesisGeographyGeologyTectonicsLight Ree MobilityEconomic GeologyEarth SciencesGeochemistryMetamorphismPetrologyMineral Geochemistry
Research Article| August 01, 1996 Rare earth element redistribution during high-pressure–low-temperature metamorphism in ophiolitic Fe-gabbros (Liguria, northwestern Italy): Implications for light REE mobility in subduction zones Riccardo Tribuzio; Riccardo Tribuzio 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy Search for other works by this author on: GSW Google Scholar Bruno Messiga; Bruno Messiga 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy2C.N.R.–Centro di Studio per la Cristallochimica e la Cristallografia, Via Ferrata 1, I-27100 Pavia, Italy Search for other works by this author on: GSW Google Scholar Riccardo Vannucci; Riccardo Vannucci 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy2C.N.R.–Centro di Studio per la Cristallochimica e la Cristallografia, Via Ferrata 1, I-27100 Pavia, Italy Search for other works by this author on: GSW Google Scholar Piero Bottazzi Piero Bottazzi 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy Search for other works by this author on: GSW Google Scholar Author and Article Information Riccardo Tribuzio 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy Bruno Messiga 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy2C.N.R.–Centro di Studio per la Cristallochimica e la Cristallografia, Via Ferrata 1, I-27100 Pavia, Italy Riccardo Vannucci 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy2C.N.R.–Centro di Studio per la Cristallochimica e la Cristallografia, Via Ferrata 1, I-27100 Pavia, Italy Piero Bottazzi 1Dipartimento di Scienze della Terra, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (8): 711–714. https://doi.org/10.1130/0091-7613(1996)024<0711:REERDH>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Riccardo Tribuzio, Bruno Messiga, Riccardo Vannucci, Piero Bottazzi; Rare earth element redistribution during high-pressure–low-temperature metamorphism in ophiolitic Fe-gabbros (Liguria, northwestern Italy): Implications for light REE mobility in subduction zones. Geology 1996;; 24 (8): 711–714. doi: https://doi.org/10.1130/0091-7613(1996)024<0711:REERDH>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract To unravel the rare earth element (REE) redistribution during high-pressure–low-temperature metamorphism, we have analyzed by ion microprobe all the minerals from representative Fe-gabbros from Ligurian metaophiolites (northwestern Italy). Contrary to what is observed for fresh Fe-gabbros, the clinopyroxene contribution to the whole-rock REE inventory of blueschists and eclogitized Fe-gabbros is minor or negligible. In both blueschists and eclogites, REE are redistributed among newly formed minerals. In blueschists, lawsonite is the major REE carrier and concentrates almost all the light REE (LREE) in the rock, whereas titanite plays an important role for middle and heavy REE (MREE, HREE). In eclogites, LREE and HREE mainly reside in accessory allanite and garnet, respectively. The development of blueschist and eclogite facies mineral assemblages in mafic oceanic crust, due to subduction to 35–65 km depths, was not accompanied by release of significant amounts of LREE to the overlying mantle wedge. Owing to the stability of lawsonite and epidote at ultra-high-pressure conditions, subduction of mafic rocks is considered an effective mechanism to bring LREE to great depth within the mantle. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.