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

12 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

AN - SCOPUS:84981516800

VL - 343

SP - 56

EP - 71

JO - Sedimentary Geology

JF - Sedimentary Geology

SN - 0037-0738

ER -