Ituri Gr

The Ituri Group was described by Henry (1922–1923), Sluys (1945) and Verbeek (1970) in the Lindi-Aruwimi region, north of Kisangani (de Wit et al., 2015). Stratigraphic equivalent. Lindi Basin in the northeastern DRC

Synonym:

Reference: Daly et al. 1992; de Wit et al., 2015;Henry (1922–1923); Meyer 1953; Poidevin, 2007; Sluys (1945);Verbeek (1970)

[Fig 1. Simplified geological map of the Congo Basin, compiled from various published map. The stratigraphic units have been assembled into major sequences (Late Neoproterozoic, Paleozoic and Cenozoic)]

[Fig 2. Tectonic setting of the Neoproterozoic basins of present-day Central Africa, compiled from the 1: 2M geological map of the Zaire (Lepersonne, 1974) and the 1: 4M map Geology and Major Ore Deposits of Africa (Milesi et al., 2006)]

[Fig 3. Lithostratigraphic synthesis for the Neoproterozoic to Early Paleozoic period. Compiled after various authors. Dotted lines between Banalia, Alolo and Galamboge formations: stratigraphic transition by recurrences]

[Fig 4. 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 5.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 6.Northern margin of the Congo Shield. (A) Geological sketch map of the Lindi Basin (modified after Verbeek 1970; Poidevin 1985)]

[Fig 7. Stratigraphic logs of the Lindi Supergoup in the DRC (modified after Verbeek 1970). (C and D) Stratigraphic logs of the Lindi Supergoup in CAR (modified after Poidevin 1985). cc cap carbonates, SG Sturtian Glaciation, MG Marinoan Glaciation]

[Fig 8. Stratigraphic correlation between the Neoproterozoic sedimentary basins in Central Africa. Correlations based on Sr isotopic data, radiometric age constraints and revised lithological relationships]

Consists of stromatolites, carbonates and evaporates. Having more than 100 m-thick marine carbonates (Daly et al. 1992) of the Ituri Group reported as terminal Riphean (Poidevin,2007). Ituri Group consists of a basal clastic sequence containing conglomerates and sandstones, overlain by thick oolitic limestones and dolomites (de Wit et al., 2015). The Ituri Group contains the Penge arkoses (10–20 m), Lenda Carbonates with carbonaceous layers (80–130 m) and Asoso Shales and sandstones (50 m).

Implied to be coeval with the Haut Schiloango Gr, therefore interglacial between Sturtian (which ends at ca. 70% up in Cryogenian) and the Marinoan (which begins at ca. 90% to 95% up in the Cryogenian)

Marine Depositional environment