Trace elements and REE geochemistry of Middle Devonian carbonate mounds (Maïder Basin, Eastern Anti-Atlas, Morocco)

Implications for early diagenetic processes

Fulvio Franchi, Clara Turetta, Barbara Cavalazzi, Fabiana Corami, Roberto Barbieri

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Trace and rare earth elements (REEs) have proven their utility as tools for assessing the genesis and early diagenesis of widespread geological bodies such as carbonate mounds, whose genetic processes are not yet fully understood. Carbonates from the Middle Devonian conical mud mounds of the Maïder Basin (eastern Anti-Atlas, Morocco) have been analysed for their REE and trace element distribution. Collectively, the carbonates from the Maïder Basin mud mounds appear to display coherent REE patterns. Three different geochemical patterns, possibly related with three different diagenetic events, include: i) dyke fills with a normal marine REE pattern probably precipitated in equilibrium with seawater, ii) mound micrite with a particular enrichment of overall REE contents and variable Ce anomaly probably related to variation of pH, increase of alkalinity or dissolution/remineralization of organic matter during early diagenesis, and iii) haematite-rich vein fills precipitated from venting fluids of probable hydrothermal origin. Our results reinforce the hypothesis that these mounds were probably affected by an early diagenesis induced by microbial activity and triggered by abundance of dispersed organic matter, whilst venting may have affected the mounds during a later diagenetic phase.

    Original languageEnglish
    Pages (from-to)56-71
    Number of pages16
    JournalSedimentary Geology
    Volume343
    DOIs
    Publication statusPublished - Aug 15 2016

    Fingerprint

    atlas
    rare earth element
    geochemistry
    trace element
    carbonate
    mud mound
    diagenesis
    basin
    venting
    fill
    organic matter
    micrite
    remineralization
    hematite
    alkalinity
    microbial activity
    dike
    dissolution
    seawater
    anomaly

    All Science Journal Classification (ASJC) codes

    • Geology
    • Stratigraphy

    Cite this

    @article{3cf59dc88256436d95192aa65dd23577,
    title = "Trace elements and REE geochemistry of Middle Devonian carbonate mounds (Ma{\"i}der Basin, Eastern Anti-Atlas, Morocco): Implications for early diagenetic processes",
    abstract = "Trace and rare earth elements (REEs) have proven their utility as tools for assessing the genesis and early diagenesis of widespread geological bodies such as carbonate mounds, whose genetic processes are not yet fully understood. Carbonates from the Middle Devonian conical mud mounds of the Ma{\"i}der Basin (eastern Anti-Atlas, Morocco) have been analysed for their REE and trace element distribution. Collectively, the carbonates from the Ma{\"i}der Basin mud mounds appear to display coherent REE patterns. Three different geochemical patterns, possibly related with three different diagenetic events, include: i) dyke fills with a normal marine REE pattern probably precipitated in equilibrium with seawater, ii) mound micrite with a particular enrichment of overall REE contents and variable Ce anomaly probably related to variation of pH, increase of alkalinity or dissolution/remineralization of organic matter during early diagenesis, and iii) haematite-rich vein fills precipitated from venting fluids of probable hydrothermal origin. Our results reinforce the hypothesis that these mounds were probably affected by an early diagenesis induced by microbial activity and triggered by abundance of dispersed organic matter, whilst venting may have affected the mounds during a later diagenetic phase.",
    author = "Fulvio Franchi and Clara Turetta and Barbara Cavalazzi and Fabiana Corami and Roberto Barbieri",
    year = "2016",
    month = "8",
    day = "15",
    doi = "10.1016/j.sedgeo.2016.07.008",
    language = "English",
    volume = "343",
    pages = "56--71",
    journal = "Sedimentary Geology",
    issn = "0037-0738",
    publisher = "Elsevier",

    }

    Trace elements and REE geochemistry of Middle Devonian carbonate mounds (Maïder Basin, Eastern Anti-Atlas, Morocco) : Implications for early diagenetic processes. / Franchi, Fulvio; Turetta, Clara; Cavalazzi, Barbara; Corami, Fabiana; Barbieri, Roberto.

    In: Sedimentary Geology, Vol. 343, 15.08.2016, p. 56-71.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Trace elements and REE geochemistry of Middle Devonian carbonate mounds (Maïder Basin, Eastern Anti-Atlas, Morocco)

    T2 - Implications for early diagenetic processes

    AU - Franchi, Fulvio

    AU - Turetta, Clara

    AU - Cavalazzi, Barbara

    AU - Corami, Fabiana

    AU - Barbieri, Roberto

    PY - 2016/8/15

    Y1 - 2016/8/15

    N2 - Trace and rare earth elements (REEs) have proven their utility as tools for assessing the genesis and early diagenesis of widespread geological bodies such as carbonate mounds, whose genetic processes are not yet fully understood. Carbonates from the Middle Devonian conical mud mounds of the Maïder Basin (eastern Anti-Atlas, Morocco) have been analysed for their REE and trace element distribution. Collectively, the carbonates from the Maïder Basin mud mounds appear to display coherent REE patterns. Three different geochemical patterns, possibly related with three different diagenetic events, include: i) dyke fills with a normal marine REE pattern probably precipitated in equilibrium with seawater, ii) mound micrite with a particular enrichment of overall REE contents and variable Ce anomaly probably related to variation of pH, increase of alkalinity or dissolution/remineralization of organic matter during early diagenesis, and iii) haematite-rich vein fills precipitated from venting fluids of probable hydrothermal origin. Our results reinforce the hypothesis that these mounds were probably affected by an early diagenesis induced by microbial activity and triggered by abundance of dispersed organic matter, whilst venting may have affected the mounds during a later diagenetic phase.

    AB - Trace and rare earth elements (REEs) have proven their utility as tools for assessing the genesis and early diagenesis of widespread geological bodies such as carbonate mounds, whose genetic processes are not yet fully understood. Carbonates from the Middle Devonian conical mud mounds of the Maïder Basin (eastern Anti-Atlas, Morocco) have been analysed for their REE and trace element distribution. Collectively, the carbonates from the Maïder Basin mud mounds appear to display coherent REE patterns. Three different geochemical patterns, possibly related with three different diagenetic events, include: i) dyke fills with a normal marine REE pattern probably precipitated in equilibrium with seawater, ii) mound micrite with a particular enrichment of overall REE contents and variable Ce anomaly probably related to variation of pH, increase of alkalinity or dissolution/remineralization of organic matter during early diagenesis, and iii) haematite-rich vein fills precipitated from venting fluids of probable hydrothermal origin. Our results reinforce the hypothesis that these mounds were probably affected by an early diagenesis induced by microbial activity and triggered by abundance of dispersed organic matter, whilst venting may have affected the mounds during a later diagenetic phase.

    UR - http://www.scopus.com/inward/record.url?scp=84981516800&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84981516800&partnerID=8YFLogxK

    U2 - 10.1016/j.sedgeo.2016.07.008

    DO - 10.1016/j.sedgeo.2016.07.008

    M3 - Article

    VL - 343

    SP - 56

    EP - 71

    JO - Sedimentary Geology

    JF - Sedimentary Geology

    SN - 0037-0738

    ER -