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Tectonic Features

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Upper Kadubu Gr
Click to display on map of the Ancient World at:
Upper Kadubu Gr base reconstruction

Upper Kadubu Gr

Period: 
Tonian

Age Interval: 
late Tonian


Province: 
Eastern Congo Margin

Type Locality and Naming

Itombwe Basin, DRC. Neoproterozoic sedimentary rocks exposed on the eastern CS. The Upper Kadubu Group has two formations, i.e. Nya-Kasiba and Tsibangu.

Synonym:

Reference: Walemba and Masters, 2005; de Wit et al., 2015

[Fig 1. Lithostratigraphic synthesis for the Neoproterozoic to Early Paleozoic period. Compiled after various authors (see text).Dotted lines between Banalia, Alolo and Galamboge formations: stratigraphic transition by recurrences.]

[Fig 2. Lithostratigraphic columns for the Congo Basin established using data from the 4 wells in the central part of the basin and outcrops on its NE margin (Lindi-Ubangi and Kisangani-Kindu region), compared with the West-Congo and Katanga stratigraphy.]

[Fig. 3.Simplified geological map of Sub-Saharan Africa showing the Neoproterozoic basins on and around the Congo Shield (modified after De Waele et al. 2008). (LC) Lower Congo Basin, (Co) Comba Basin, (Sa) Sangha Basin, (Ny) Nyanga-Niari Basin, (An) Angola Basin, (SO) Semb-Ouesso Basin, (Ba) Ubangui Basin, (LiB) Likki-Bembe´ Basin, (Bk) Bakouma Basin, (Fou) Fouroumbala Basin, (Li) Lindi Basin, It Itombwe Basin, (Ma)Malagarazi-Bukoban Basin, (Mb) Sankuru-Mbuji-Mayi-Lomami-Lovoy Basin, (Lu) Luamba Group, (Kat) Katanga Basin, (RB) Ruwenzorian Belt, KaB) Karagwe-Ankole Belt, (RuB) Ruzisian Belt, (KiB) Kibaran Belt,(UB) Ubendian Belt, IB Irumide Belt]

[Fig. 4. Stratigraphic correlation between the Neoproterozoic sedimentary basins in Central Africa. Correlations based on Sr isotopic data, radiometric age constraints and revised lithological relationships (de Wit et al., 2015).]


Lithology and Thickness

This Group comprises approximately 8,000 m-thick siliciclastic rocks (clayey sandstone of the Nya-Kasiba Fm, followed by sandy claystone of the Tshibangu Fm) which ends in the >800 m-thick Diamictite Member of the the Tshibangu Fm (Walemba and Masters 2005).


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

Upper contact

Regional extent

The Itombwe basin is recognized in the DRC Neoproterozoic sedimentary rocks exposed on the eastern CS.


GeoJSON

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Fossils


Age 


Age Span: 

    Beginning stage: 
Cryogenian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
720.00

    Ending stage: 
Cryogenian

    Fraction up in the ending stage: 
0.6

    Ending date (Ma):  
669.00

Depositional setting


Depositional pattern:  


Additional Information

The Itombwe Supergroup is affected by metamorphism from greenschist facies to weakly wrinkled metamorphosed. Deformation in the Itombwe and Malagarazi-Bukoban basins may be kinematically linked with strike-slip reactivation of the Kibaran and Karangwe-Ankole belts and/or Ubendian Belt during Pan- African orogen (de Wit et al., 2015).


Compiler:  

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

Geology and Resource Potential of the Congo Basin by Maarten J. de Wit, François Guillocheau and Michiel C.J. de Wit, Published Springer-Verlag Berlin Heidelberg 2015; DOI 10.1007/978-3-642-29482-2