The Central Atlantic Magmatic Province (CAMP) in Morocco

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  • Andrea Marzoli, IGG CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse (IGG-CNR)
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  • Herve Bertrand, Univ Lyon, Centre National de la Recherche Scientifique (CNRS), CNRS - National Institute for Earth Sciences & Astronomy (INSU), Ecole Normale Superieure de Lyon (ENS LYON), Universite Claude Bernard Lyon 1, CNRS UMR 5276, Univ Lyon 1, Lab Geol Lyon,Ecole Normale Super Lyon
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  • Nasrrddine Youbi, Univ Lisbon, Universidade de Lisboa, Fac Ciencias, Inst Dom Luiz
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  • Sara Callegaro, Univ Oslo, University of Oslo, CEED
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  • Renaud Merle, Swedish Museum Nat Hist, Swedish Museum of Natural History, Dept Geosci
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  • Laurie Reisberg, Univ Lorraine, Centre National de la Recherche Scientifique (CNRS), CNRS - National Institute for Earth Sciences & Astronomy (INSU), Universite de Lorraine, UMR 7358, Ctr Rech Petrograph & Geochim, CNRS
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  • Massimo Chiaradia, Univ Geneva, University of Geneva, Dept Earth Sci
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  • Sarah Brownlee, Wayne State Univ, Wayne State University, Dept Geol
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  • Fred Jourdan, Curtin Univ, Curtin University, Dept Appl Geol
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  • Alberto Zanetti, IGG CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse (IGG-CNR)
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  • Joshua H. F. L. Davies, Univ Quebec Montreal, University of Quebec, University of Quebec Montreal, Dept Sci Terre & Atmosphere
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  • Tiberio Cuppone, IGG CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse (IGG-CNR)
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  • Abdelkader Mahmoudi, Univ Moulay Ismail, Moulay Ismail University of Meknes, Dept Geol
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  • Fida Medina, Moroccan Assoc Geosci
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  • Paul R. Renne, Univ Calif Berkeley, University of California System, University of California Berkeley, Dept Earth & Planetary Sci
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  • Giuliano Bellieni, IGG CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse (IGG-CNR)
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  • Stefano Crivellari, Univ Sao Paulo, Universidade de Sao Paulo, Inst Geociencias
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  • Hind El Hachimi, Chouaib Doukkali Univ, University Chouaib Doukkali, Fac Sci, Dept Geol
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  • Mohamed Khalil Bensalah, Univ Lisbon, Universidade de Lisboa, Fac Ciencias, Inst Dom Luiz
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  • Christine M. Meyzen, IGG CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse (IGG-CNR)
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  • Christian Tegner

The Central Atlantic Magmatic Province (CAMP) is a large igneous province (LIP) composed of basic dykes, sills, layered intrusions and lava flows emplaced before Pangea break-up and currently distributed on the four continents surrounding the Atlantic Ocean. One of the oldest, best preserved and most complete sub-provinces of the CAMP is located in Morocco. Geochemical, geochronologic, petrographic and magnetostratigraphic data obtained in previous studies allowed identification of four strato-chemical magmatic units, i.e. the Lower, Intermediate, Upper and Recurrent units. For this study, we completed a detailed sampling of the CAMP in Morocco, from the Anti Atlas in the south to the Meseta in the north. We provide a complete mineralogical, petrologic (major and trace elements on whole-rocks and minerals), geochronologic (Ar-40/Ar-39 and U-Pb ages) and geochemical set of data (including Sr-Nd-Pb-Os isotope systematics) for basaltic and basaltic-andesitic lava flow piles and for their presumed feeder dykes and sills. Combined with field observations, these data suggest a very rapid (

Sr-Nd-Pb-Os isotopic ratios in the CAMP units from Morocco are similar to those of other CAMP sub-provinces and suggest a significant enrichment of the mantle-source regions by subducted crustal components. The enriched signature is attributed to involvement of about 5-10% recycled crustal materials introduced into an ambient depleted or PREMA-type mantle, while involvement of mantle-plume components like those sampled by present-day Central Atlantic Ocean Island Basalts (OIB, e.g. Cape Verde and Canary Islands) is not supported by the observed compositions. Only Recurrent basalts may possibly reflect a Central Atlantic plume-like signature similar to the Common or FOZO components.

OriginalsprogEngelsk
TidsskriftJournal of Petrology
Vol/bind60
Nummer5
Sider (fra-til)945-995
Antal sider51
ISSN0022-3530
DOI
StatusUdgivet - maj 2019

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