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Jbeliat Gr
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Jbeliat Gr base reconstruction

Jbeliat Gr

Period: 
Cryogenian

Age Interval: 
latest Cryogenian


Province: 
Taoudeni Basin

Type Locality and Naming

Taoudeni Basin is a vast intracratonic sedimentary basin spanning parts of Mauritania, Mali, Algeria, Burkina Faso and Guinea This generalized formation is everywhere in the entire Taoudeni Basin (e.g., Adrar, Hodh and Hank sub-basins).

Synonym: Jbeliat Khang Naam Gr, Jbébiat Gr, Jbébiat Khang Naam Gr

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

[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 Jbeliat Gr (or Jbeliat Khang Naam Gr) is made up of glaciogenic deposits throughout the Taoudeni Basin. It was described in the Hank Sub-basin as green mudstone and diamictite, interbedded with mauve to red, parallel laminated mudstones and grey sandstones (Bradley et al., 2015).


Lithology Pattern: 
Glacial till


Relationships and Distribution

Lower contact

Unconformably overlies the Assabet el Hassiane Gr (Aioun Gr) in the Adrar (Hohd) Sub-basin, and Unconformably overlies the Bir Amrane Gr in the Hank Sub-basin.

Upper contact

Conformably overlain by the Teniagouri Gr ( Nioro Gr) in the Adrar (Hohd) sub-basins respectively, and Conformably overlain by the Azlaf Gr in the Hank Sub-basin.

Regional extent

This formation is mainly in the western portion (e.g., Adrar-Hohd sub-basin) of the Taoudeni Basin


GeoJSON

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Fossils


Age 

Martin-Monge et al. (2016) assign this to the Marinoan glacial, which spans the latest (ca. 5% of the Cryogenian)

Age Span: 

    Beginning stage: 
Cryogenian

    Fraction up in beginning stage: 
0.95

    Beginning date (Ma): 
639.25

    Ending stage: 
Cryogenian

    Fraction up in the ending stage: 
0.0

    Ending date (Ma):  
720.00

Depositional setting

Glacial


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