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Tenemouj Gr
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Tenemouj Gr base reconstruction

Tenemouj Gr

Period: 
Devonian, Carboniferous

Age Interval: 
Emsian - Kasimovian


Province: 
Taoudeni Basin

Type Locality and Naming

This formation is mainly in the western portion (e.g., Adrar and Hohd sub-basins) of the Taoudeni Basin, which a vast intracratonic sedimentary basin spanning parts of Mauritania, Mali, Algeria, Burkina Faso and Guinea.

Synonym:

References: Martin-Monge et al., 2016

[Fig. 1: Location of the Taoudeni Basin Province and the four assessment units defined in the study by Brownfield et al. (2015)]

[Fig. 2: The Taoudeni Basin (Taupin et al., 2017)]

[Fig. 3: Abolag-1 well, R well and Atar Group type section stratigraphy, facies description and correlation in the Taoudeni Basin, and organic richness profile in the Abolag-1 well (Claue,1981; Rooney et al.2009; Trompette,1973; Albert-Villanueva et al. 2016).]

[Fig. 4: Generalized stratigraphy of the Taoudeni Basin in Mauritania. Lithostratigraphic name equivalences are provided for the Adrar, Hank and Hodh depocentres. The major discontinuities are numbered and reference to global glacial and tectonic events is provided. (From Martin-Monge et al. (2016) as modified after Lahondere et al., 2003, 2005]


Lithology and Thickness

The Tenemouj Gr is characterized at the top and base by sandstones, and in the middle by carbonates. "Sandy limestone" pattern used here to emphasize the carbonate component in the graphics.


Lithology Pattern: 
Sandy limestone


Relationships and Distribution

Lower contact

unconformably (early Devonian is absent?) overlies the Oued Chig Gr

Upper contact

unconformably (entire Permian through mid-Cretaceous is absent) overlain by the Continental Intercalaire Fm,

Regional extent

This formation is mainly in the western portion (e.g., Adrar-Hohd sub-basin) of the Taoudeni Basin; but might not have any equivalent in the Hodh-Afolle subbasin of the western Taoudeni Basin (Martin-Monge et al., 2016). The group is the equivalent of the combined El Guettara Gr and Dagouber Gr in the Hank Subbasin of eastern Taoudeni Basin (Martin-Monge et al., 2016).


GeoJSON

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Fossils


Age 

Martin-Monge et al. (2016) summary figure schematically indicates a span of middle Devonian to nearly the top of the Carboniferous (but not the Gzhelian Stage at the top of Carboniferous); however, it is questionable if it indeed encompasses the late Carboniferous.

Age Span: 

    Beginning stage: 
Emsian

    Fraction up in beginning stage: 
0.00

    Beginning date (Ma): 
410.51

    Ending stage: 
Kasimovian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
303.68

Depositional setting

Shallow-marine depositional environment


Depositional pattern:  


Additional Information


Compiler:  

Enam O. Obiosio, Solomon Joshua Avong and Henry Nasir Suleiman (2024) - Stratigraphic Lexicon compiled from the following publications:

Wenzhe, G. (2009): Hydrocarbon generation conditions and exploration potential of the Taoudeni Basin, Mauritania. Pet. Sci., 6: pp.29-37

Taylor, C. D. and Giles, S. A. (2013): Mineral Potential for Sediment-Hosted Copper Deposits in the Islamic Republic of Mauritania: Phase V, Deliverable 75. U.S. Geological Survey, Reston, Virginia

Martin-Monge, A., Baudino, R., Gairifo-Ferreira, L. M., Tocco, R., Badali, M., Ochoa, M., Haryono, S., Soriano, S., El Hafiz, N., Mez, J. H., Chacon, B., Brisson, I., Grammatico, G., Varade, R., and Abdallah, H. (2016): An unusual Proterozoic petroleum play in Western Africa: the Atar Group carbonates (Taoudeni Basin, Mauritania). In: Sabato Ceraldi, T., Hodgkinson, R. A. & Backe, G. (eds) Petroleum Geoscience of the West Africa Margin. Geological Society, London, Special Publications, 438, http://doi.org/10.1144/SP438.5

Bradley, D. C., Motts, H. A., Horton, J. D., Giles, Stuart, and Taylor, C. D. (2015): Geologic Map of Mauritania (Phase V, Deliverables 51a, 51b, and 51c), Chap. A1 of Taylor, C. D., ed., Second Projet de Renforcement Institutionnel du Sector Minier de la Republique Islamique de Mauritanie (PRISM-II): U.S. Geological Survey Open-File Report 2013-1280-A1, 3 pl., http://dx.doi.org/10.3133/ofr20131280.