Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Sedimentology and chemostratigraphy of the late Neoproterozoic carbonate ramp sequences of the Huttenbeg Formation (northwestern Namibia) and the C5 Formation (western central Democratic Republic of Congo): Record of the late post-Marinoan marine transgression on the margin of the Congo Craton
Delpomdor, F.; Schröder, S.; Préat, A.; Lapointe, P.; Blanpied, C. (2018). Sedimentology and chemostratigraphy of the late Neoproterozoic carbonate ramp sequences of the Huttenbeg Formation (northwestern Namibia) and the C5 Formation (western central Democratic Republic of Congo): Record of the late post-Marinoan marine transgression on the margin of the Congo Craton. South African journal of geology 121(1): 23-42. https://dx.doi.org/10.25131/sajg.121.0003
In: South African Journal of Geology. ISSN 1012-0750; e-ISSN 1996-8590
|  |
| Auteurs | | Top |
- Delpomdor, F.
- Schröder, S.
- Préat, A.
|
- Lapointe, P.
- Blanpied, C.
|
|
| Abstract |
The Neoproterozoic Marinoan climatic event corresponded to the Snowball Earth-type glaciation, and is commonly marked by the deposition of diamictites and by a negative carbon isotope anomaly. This event was followed by a sudden return to a greenhouse climate and a rapid post-glacial transgression with deposition of cap carbonates. Although the cap carbonates and marine carbonate sediments at the base of the post-glacial period are well known in the literature, few studies focused on the end of the marine transgression, which is a prelude to the Pan African Orogeny in Central Africa. In this paper, we present new descriptions of these carbonate rocks and a sedimentological study from key cores and outcrops in the Otavi Mountainland (Namibia) and West Congo belt (DRC) of the Huttenberg Formation and the C5 Formation, respectively. Both successions show five main facies: (i) microbial 'mounds' and pinnacles; (ii) ooid-shoal barrier; (iii) evaporitic brackish lagoon; (iv) beach and (v) coastal sabkha. The Huttenberg Formation consists of an open-marine mid-inner carbonate ramp setting including microbial mounds and pinnacles, and oolitic shoal-barrier islands. The C5 Formation exhibits a hypersaline inner carbonate ramp including an ooid shoal barrier, an evaporitic brackish lagoon, a beach and a coastal sabkha plain. Sedimentological, chemostratigraphical and biostratigraphical comparisons between the C5 and Huttenberg formations suggest these are coeval carbonate shelf deposits on the margins of the Congo Craton, with a depositional age between 580 Ma and 540 Ma for both formations. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
