Showing papers in "Journal of African Earth Sciences in 2005"

TL;DR: In this paper, the authors summarize the evolution of the greater Red Sea-Gulf of Aden rift system, which includes the Gulfs of Suez and Aqaba, the Red Sea and Gulf of Aden marine basins and their continental margins, and the Afar region.

TL;DR: In this article, the authors considered the East African rift system (EARS) as an intra-continental ridge system, comprising an axial rift, and the structural organization in three branches, the overall morphology, lithospheric cross-sections, the morphotectonics, the main tectonic features, and volcanism in its relationships with the tectonics.

TL;DR: In a recent paper as discussed by the authors, the principal paleogeographic characteristics of North and Central Africa during the Paleozoic were the permanency of large exposed lands over central Africa, surrounded by northerly and northwesterly dipping pediplanes episodically flooded by epicontinental seas related to the Paleotethys Ocean.

TL;DR: In this paper, the authors focus on the Karoo basins sensu stricto of south-central Africa, synthesizing their sedimentological and stratigraphic features in relation to the tectonic and climatic controls on accommodation and sedimentation.

TL;DR: The origin of the Neoproterozoic central African copperbelt remains speculative, with the debate centred around syngenetic-diagenetic and hydrothermal-dagenetic hypotheses as discussed by the authors.

TL;DR: The first reliable synthesis of much of the country was made by Gentil and illustrated by a map at a scale of 1/500000 (Gentil 1920). Several regional descriptions were carried out by the Geological Survey, progressing roughly from north to south as mentioned in this paper.

TL;DR: The origin of the PGE mineralization remains controversial as mentioned in this paper, but the most important deposits occur as relatively narrow stratiform reefs in the lower to central ultramafic-mafic portions of large tholeiitic intrusions of late Archean to early Proterozoic age.

TL;DR: In this paper, the authors summarise the stratigraphy, structure and petroleum geology of the Central Atlantic margin of NW Africa, from Morocco to Guinea, from late Triassic (Carnian) times and clastic red bed sequences were deposited on both sides of the Atlantic margins.

TL;DR: In this article, a comparative review of two representative segments: the equatorial western Africa and the SW Africa margins, helps in analysing the main controlling factors on the development of these margins.

TL;DR: The Kalahari basin formed as a response to down-warp of the interior of southern Africa, probably in the Late Cretaceous as mentioned in this paper, along with possible uplift along epeirogenic axes.

TL;DR: In this paper, a comprehensive sequence stratigraphy in the Anambra Basin/Afikpo Syncline complex of southeastern Nigeria is presented, including integrated sedimentologic, macrofossil, trace fossil, and palynofacies data from Paleocene-Middle Eocene outcrops.

TL;DR: In this paper, the authors outline geomorphological and tectonic elements of the Afar Depression, and discuss its evolution, including the formation and evolution of Afar Dome.

TL;DR: The Pan-African event assembled the supercontinent of Gondwana during the Late Proterozoic, and is manifest within the African plate by an anastomosing pattern of tectonic sutures and mobile belts.

TL;DR: The Nchanga Granite, the youngest pre-Katangan intrusion in the Copperbelt basement, is nonconformably overlain by sedimentary rocks of the Katanga Supergroup as mentioned in this paper.

TL;DR: In this article, detrital zircons and clasts from the Grand Conglomerat glacial diamictite indicate a source from the Palaeoproterozoic metavolcanic porphyries and granitoids of Luina Dome region, which was a basement high during Nguba Group deposition.

TL;DR: The evolution of the Paleozoic basins of West Africa is strongly depending on the structuration of the different belts which are surrounding the West African Craton as mentioned in this paper, and the main tectonic or climatic events that occurred during this period are registered by the sediments.

TL;DR: The geology of the Congo Basin has been studied in this paper, where the authors have identified the underlying Precambrian basement of the basin and interpreted the structural evolution of the Basin.

TL;DR: In this article, the Cretaceous deposits in central Tunisia blocks were studied by sequence stratigraphy, 2D seismic interpretation calibrated to the well and associated outcrop data, and constructing and comparing histories of the northern and southern blocks of the Gafsa master fault was the establishment of platform to basin stratigraphic configuration based on the major unconformity surfaces.

TL;DR: The Phanerozoic geological evolution of the Equatorial Atlantic domain has been controlled since the end of Early Cretaceous by the Romanche and Saint Paul transform faults as discussed by the authors.

TL;DR: The Kamanjab-Bangweulu arc was formed by the Ubendian orogeny during the ca. 2.07-2.00 ǫ-Ga as mentioned in this paper.

TL;DR: In this paper, the SHRIMP U-Pb age data on metamorphic monazite, as well as step-heating 40Ar-39Ar ages on muscovite and microcline from Katangan metasedimentary rocks of the Central African Copperbelt are presented.

TL;DR: In this article, the presence of thrust-stacked successions, together with evidence of thrusteliminated pelitic units, cast doubt on the reliability of some aspects of the accepted lithostratigraphy.

TL;DR: Ag-ores occur in a specific zone of the Bou Azzer Co-As deposit in the Precambrian basement of the Anti-Atlas belt (Morocco), especially in highly microfractured quartz-depleted diorite as mentioned in this paper.

TL;DR: In this paper, a micro-probe analysis of the serpentinites and associated chromitite lenses is presented, which indicates that the parent ultramafic rocks were serpentinized under higher pressure.

TL;DR: In this article, the Patti Formation has been studied by incident light microscopy and geochemical analysis to determine the maceral components, geochemical type and potential yield of the pyrolysate.

TL;DR: In this article, chemical analyses of 192 samples of Katangan sedimentary rocks from Kolwezi, Kambove-Kabolela and Luiswishi in the central African Copperbelt (Katanga, Congo) are used to constrain the source and depositional environment of RAT and Mines Subgroup sedimentary rock and the geochemical relations between the rocks from these units and the debate on the lithostratigraphic position of the RAT Subgroup within the Katanga sedimentary succession.

TL;DR: The Phanerozoic has witnessed major changes, with Africa being an integral part of supercontinental landmass agglomeration forming Gondwana, its amalgamation with smaller landmasses to form Pangaea, and later disintegrating to form the existing continents as discussed by the authors.

TL;DR: This paper used SHRIMP zircon ages for high-grade rocks from the Pan-African Mozambique belt (MB) of central Tanzania document reworking of Archaean-Palaeoproterozoic crust during the formation of this NeoproTERozoic collisional orogen.

TL;DR: In this paper, a multi-disciplinary characterisation of processes that influence sedimentation and lake water chemistry in the northern part of the Lake Malawi (or Lake Nyasa), East Africa is presented.

TL;DR: A detailed analysis of the morphology of the ostrich eggshells and their taxonomic affinities indicates that two different species of Struthio are represented as discussed by the authors, and the first appearance of S. camelus at ∼3.6-3.8-Ma.