Article (Scientific journals)
A palaeoecological model for the late Mesoproterozoic–early Neoproterozoic Atar/El Mreïti Group, Taoudeni Basin, Mauritania, northwestern Africa
Beghin, Jérémie; Guilbaud, Romain; Poulton, Simon W. et al.
2017In Precambrian Research, 299, p. 1-14
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Keywords :
Palaeoredox conditions; Iron speciation; Early eukaryotes; Palaeoecology
Abstract :
[en] Reconstructing the spatial distribution of early eukaryotes in palaeoenvironments through Proterozoic sedimentary basins provides important information about their palaeoecology and taphonomic conditions. Here, we combine the geological context and a reconstruction of palaeoenvironmental redox conditions (using iron speciation) with quantitative analysis of microfossil assemblages (eukaryotes andincertae sedis), to provide the first palaeoecological model for the Atar/El Mreïti Group of the Taoudeni Basin. Our model suggests that in the late Mesoproterozoic–early Neoproterozoic, the availability of both molecular oxygen and nutrients controlled eukaryotic diversity, higher in oxic shallow marginal marine environments, while coccoidal colonies and benthic microbial mats dominated respectively in anoxic iron-rich and euxinic waters during marine highstands or away from shore where eukaryotes are lower or absent.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Beghin, Jérémie ;  Université de Liège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Guilbaud, Romain
Poulton, Simon W.
Gueneli, Nur
Brocks, Jochen
Storme, Jean-Yves
Blanpied, Christian
Javaux, Emmanuelle  ;  Université de Liège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Language :
English
Title :
A palaeoecological model for the late Mesoproterozoic–early Neoproterozoic Atar/El Mreïti Group, Taoudeni Basin, Mauritania, northwestern Africa
Publication date :
19 July 2017
Journal title :
Precambrian Research
ISSN :
0301-9268
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
299
Pages :
1-14
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO IAP PLANET TOPERS
ERC Stg ELiTE FP7/308074
Australian Research Council (DP1095247 and DP160100607)
Royal Society Wolfson Research Merit Award
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