Unexpected Jurasic to Neogene vertical movements in "stable" parts of NW Africa revealed by low temperature geochronology

B. Ghorbal, G.V. Bertotti, J.P.T. Foeken, P.A.M. Andriessen

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    In Morocco, it is generally considered that post-Hercynian vertical movements were limited to the Atlas system, the passive continental margin and the Rif. Apatite FT and He ages from the Moroccan Meseta (Rehamna and Zaer Massif) document instead two episodes of subsidence and exhumation in Jurassic-Early Cretaceous and during the Late Cretaceous to Neogene. The Meseta subsided to >3 km depth during the Late Triassic to Middle Jurassic and was exhumed to the surface before the Late Cretaceous, during the rift and post-rift stages of Central Atlantic opening. Erosion of the exhuming rocks is responsible for a thick package of terrigenous sands found in the Moroccan offshore and elsewhere along the NW Africa margin. About 1km of subsidence affected the Meseta during the Late Cretaceous to Eocene. During the Neogene, these areas were brought back to the surface in association with bimodal folding with wavelengths of 100-150 km and >500 km. © 2008 Blackwell Publishing.
    Original languageEnglish
    Pages (from-to)355-363
    JournalTerra Nova
    Volume20
    DOIs
    Publication statusPublished - 2008

    Fingerprint

    vertical movement
    geochronology
    Neogene
    Cretaceous
    subsidence
    Jurassic
    exhumation
    atlas
    apatite
    folding
    continental margin
    Eocene
    Triassic
    wavelength
    erosion
    sand
    Africa
    rock

    Cite this

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    title = "Unexpected Jurasic to Neogene vertical movements in {"}stable{"} parts of NW Africa revealed by low temperature geochronology",
    abstract = "In Morocco, it is generally considered that post-Hercynian vertical movements were limited to the Atlas system, the passive continental margin and the Rif. Apatite FT and He ages from the Moroccan Meseta (Rehamna and Zaer Massif) document instead two episodes of subsidence and exhumation in Jurassic-Early Cretaceous and during the Late Cretaceous to Neogene. The Meseta subsided to >3 km depth during the Late Triassic to Middle Jurassic and was exhumed to the surface before the Late Cretaceous, during the rift and post-rift stages of Central Atlantic opening. Erosion of the exhuming rocks is responsible for a thick package of terrigenous sands found in the Moroccan offshore and elsewhere along the NW Africa margin. About 1km of subsidence affected the Meseta during the Late Cretaceous to Eocene. During the Neogene, these areas were brought back to the surface in association with bimodal folding with wavelengths of 100-150 km and >500 km. {\circledC} 2008 Blackwell Publishing.",
    author = "B. Ghorbal and G.V. Bertotti and J.P.T. Foeken and P.A.M. Andriessen",
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    Unexpected Jurasic to Neogene vertical movements in "stable" parts of NW Africa revealed by low temperature geochronology. / Ghorbal, B.; Bertotti, G.V.; Foeken, J.P.T.; Andriessen, P.A.M.

    In: Terra Nova, Vol. 20, 2008, p. 355-363.

    Research output: Contribution to JournalArticleAcademicpeer-review

    TY - JOUR

    T1 - Unexpected Jurasic to Neogene vertical movements in "stable" parts of NW Africa revealed by low temperature geochronology

    AU - Ghorbal, B.

    AU - Bertotti, G.V.

    AU - Foeken, J.P.T.

    AU - Andriessen, P.A.M.

    PY - 2008

    Y1 - 2008

    N2 - In Morocco, it is generally considered that post-Hercynian vertical movements were limited to the Atlas system, the passive continental margin and the Rif. Apatite FT and He ages from the Moroccan Meseta (Rehamna and Zaer Massif) document instead two episodes of subsidence and exhumation in Jurassic-Early Cretaceous and during the Late Cretaceous to Neogene. The Meseta subsided to >3 km depth during the Late Triassic to Middle Jurassic and was exhumed to the surface before the Late Cretaceous, during the rift and post-rift stages of Central Atlantic opening. Erosion of the exhuming rocks is responsible for a thick package of terrigenous sands found in the Moroccan offshore and elsewhere along the NW Africa margin. About 1km of subsidence affected the Meseta during the Late Cretaceous to Eocene. During the Neogene, these areas were brought back to the surface in association with bimodal folding with wavelengths of 100-150 km and >500 km. © 2008 Blackwell Publishing.

    AB - In Morocco, it is generally considered that post-Hercynian vertical movements were limited to the Atlas system, the passive continental margin and the Rif. Apatite FT and He ages from the Moroccan Meseta (Rehamna and Zaer Massif) document instead two episodes of subsidence and exhumation in Jurassic-Early Cretaceous and during the Late Cretaceous to Neogene. The Meseta subsided to >3 km depth during the Late Triassic to Middle Jurassic and was exhumed to the surface before the Late Cretaceous, during the rift and post-rift stages of Central Atlantic opening. Erosion of the exhuming rocks is responsible for a thick package of terrigenous sands found in the Moroccan offshore and elsewhere along the NW Africa margin. About 1km of subsidence affected the Meseta during the Late Cretaceous to Eocene. During the Neogene, these areas were brought back to the surface in association with bimodal folding with wavelengths of 100-150 km and >500 km. © 2008 Blackwell Publishing.

    U2 - 10.1111/j.1365-3121.2008.00828.x

    DO - 10.1111/j.1365-3121.2008.00828.x

    M3 - Article

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    SP - 355

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    JO - Terra Nova

    JF - Terra Nova

    SN - 0954-4879

    ER -