Argilo-Carbonate Formation

Argilo-Carbonate Fm

Period:

Triassic

Age Interval:

Norian (?).

Province:
Oued Mya Basin, Ghadames Basin

Type Locality and Naming

French for clayey carbonate (informal term based on facies)

Synonym: TAC (Triassic Argilo-Carbonate) Fm. (Klett, 2000). Ouled Nesr (? – in diagram of Klett, 2000, but hard to read). Azizia Fm (Ghadames Basin? – diagram in Bora and Dubey, 2015)

References: Klett, 2000.

Lithology and Thickness

The Argilo-Carbonate (TAC) Fm. is made up of dolostones with clayey sandstones (Klett, 2000).

Lithology Pattern:

Dolomite

Relationships and Distribution

Lower contact

It conformably overlies the TAGI Fm.

Upper contact

It is conformably overlain by the TAGS Fm.

Regional extent

GeoJSON

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Fossils

Age

Age Span:

Beginning stage:

Carnian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

232.15

Ending stage:

Carnian

Fraction up in the ending stage:

1.0

Ending date (Ma):

227.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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

Baouche, R., Ganguli, S. S., Sen, S., Radwan A. E. (2023): Assessment of reservoir stress state and its implications for Paleozoic tight oil reservoir development in the Oued Mya Basin, northeastern Algerian Sahara. Geosystems and Geoenvironment 2: pp.1-18. https://doi.org/10.1016/j.geogeo.2022.100112

Fadila B. (2004): Reservoir Characterization and Reservoir Modeling in the Northwestern Part of Hassi Massaoud Field Algeria. A PhD thesis at the University of Hamburg, Hamburg, Germany.

T.R. Klett (2000): Total Petroleum Systems of the Trias/Ghadames Province, Algeria, Tunisia, and Libya - The Tanezzuft-Oued Mya, Tanezzuft-Melrhir, and Tanezzuft-Ghadames. U.S. Geological Survey Bulletin, 2202-C.

Kraouia et al., (2023): Ordovician–Upper Silurian–Triassic Petroleum System Assessment in the Chotts Area. In S. Khomsi and F. Roure (eds.), Geology of North Africa and the Mediterranean: Sedimentary Basins and Georesources, Regional Geology Reviews, https://doi.org/10.1007/978-3-031-18747-6_7

Bora, D., Dubey, S. (2015): New insight on petroleum system modeling of Ghadames basin, Libya. Journal of African Earth Sciences, 112: pp.111-128. http://dx.doi.org/10.1016/j.jafrearsci.2015.08.020