The completeness of urban geotechnical databases is highlighted and their application to environmental construction and related geological problems illustrated. This book is likely to become the single most valuable reference for geoscientists seeking an overarching entree in English into the geology of the Congo Basin. These conclusions allow a better understanding of the global geological processes that today affect our lives. Keywords: Africa, Cenozoic, Siliciclastic sediment fluxes, Tectonics, Climate. The Congo Basin of central Africa is a large iconic Phanerozoic sedimentary basin whose origin and tectonic evolution are poorly understood, mostly because of a lack of modern stratigraphic data, reflecting a long hiatus in field investigations during the past five decades.
The overlying sequences are dated biostratigraphically to be Carboniferous-Permian the Lukuga Group and Triassic the Haute Lueki Group in age. This book summarizes the geomorphology, geology, geochronology, geophysics and mineral resources of the Congo Basin, one of the world's most enigmatic and poorly understood major intra-continental sedimentary basins, and its flanking areas of Central Africa. It provides an up to date analysis of the large region's origin and evolution. The book's nineteen chapters take the reader through the entire basement history, as well as the Basin's ca. Neoproterozoic to Cambrian evolution of the Congo basin. It was one of the largest and long lasting supercontinents on E arth´s history, comprising five large continents Africa, Australia, Antarctica, South America and India and many other smaller masses scattered today around the globe e. These conclusions are based on a rather limited and incomplete geological and geophysical data.
These sequences have been used to develop a fence diagram and basin model for the Kasai portion of the Congo Basin. This finding suggests that lithospheric structure beneath the basin is not uniform, as is commonly assumed in geodynamic models explaining how the basin formed. The stratigraphy of cover sequences across the basin is ambiguous and poorly resolved as a result of limited studies and inconsistent nomenclature between different regions, poor age controls and ambiguous biostratigraphy that obfuscate the depositional history of the basin. Bei einer missbräuchlichen Weitergabe des eBooks an Dritte ist eine Rückverfolgung an die Quelle möglich. A specific feature of this book is its synthesis, performed by teams of active experts, of a vast amount of geoscientific data previously only recorded in research reports, company reports, survey bulletins, and scattered journal articles and books. Research and practice of urban geology in Africa have seen the development of new outputs to aid urban development, regeneration and conservation.
Emplacement of the Late Cretaceous kimberlites Mbuji Mayi, Tshibwe, Kasendou and Lukashi was concomitant with the deposition of Cretaceous sedimentary sequences. The Congo Basin is characterized by an extensive and relatively thick ca. Because the sedimentary sequences of this basin are largely terrestrial, we apply a new backstripping method especially designed for continental domain. This integration is fundamental for the achievement of this project. We also re-visited and re-sampled some reported oil seeps and conclude these to be due to anthropic pollution.
Additional short term variations ~20-40 Myr of the subsidence are interpreted by dynamic subsidence or uplift caused by sublithospheric mantle instabilities at the transition between litho-spheres of different thicknesses. Many cities have become densely overpopulated as a result of migration due to civil wars and the search for a better life. It also presents and evaluates new basin models and related dynamic processes, as well as revised correlation schemes with its Gondwana counterparts in South America, all of which provide key insights into its rich diamond deposits and other mineral wealth, which are documented in the final chapters. Gondwana was the first recognised supercontinent and as such has played a pivotal role in our understanding of supercontinent cycles. Following Jurassic-Cretaceous hot and arid sedimentation across southwest Gondwana culminated in widespread deposition of northerly-derived aeolian dunes, episodically interrupted by successive eruption of Large Igneous Provinces during the initial phases of Gondwana break-up ca. The peripheral Neoproterozoic basins are better exposed and share first-order similarities in their stratigraphic successions with an initial coarse clastic sequence followed by a carbonate sequence and terminating by a dominantly siliciclastic sequence.
The northern margin of Gondwana - facing the Tethys ocean - was entirely different, with stable, wide continental shelves and shallow seas from Northern Africa to Papua New Guinea. Heat advection by hydrothermal or volcanic fluids can conversely reduce the magnitude of this erosion. Precambrian basement of the Congo basin and flanking terranes. This discourse examines the dynamics of geoenvironmental phenomena and processes in Africa's largest urban settings Cairo, Lagos and Kinshasa , and uses case studies and city overviews descriptions and geodata analyses to show how the application of geology to urban construction and development in Africa should be effectively done. The prospecting history of this river goes back to 1906 but a systematic exploration program over the lower Kwango was only initiated in 2005.
This is the only way to integrate scientific thinking about Gondwana. Although these subdivisions are useful for broad, regional-scale correlations, drilling and investigation of twenty two new cores and examination of outcrop in the southern Kasai portion of the basin, from Tshikapa to Kabinda, reveals considerable facies, provenance and thickness variations, suggesting a more complex depositional and stratigraphic history than previously recognized. Since 1872, when the geologist Medlicott identified the Gondwana flora in India, through the definition of the Gondwana Land by Suess in 1885 and the first maps by Wegener and Du Toit in the dawn of the twentieth century, this major subject has been investigated by many scientists worldwide. Gondwana research involves the understanding of the evolution of our planet, its climatic, thermal and tectonic processes and the evolution of life itself. They all formed in extensional tectonic environments and were subsequently affected by deformation events during the Late Neoproterozoic — Early Cambrian Pan-African orogenic period. The results convincingly suggest that the Congo Basin represents a more structurally complicated basin than previously appreciated, with multiple fault-bounded basement highs and depo-centers that strongly influenced regional sedimentation patterns. This is one alternative to harmonize a sustainable future on the planet.
A somewhat simple stratigraphy has generally been applied to the Congo Basin, with gross subdivision of the Mesozoic-Cenozoic cover sequences into numerous poorly resolved units. It provides an up to date analysis of the large region's origin and evolution. A specific feature of this book is its synthesis, performed by teams of active experts, of a vast amount of geoscientific data previously only recorded in research reports, company reports, survey bulletins, and scattered journal articles and books. The book's nineteen chapters take the reader through the entire basement history, as well as the Basin's ca. The sheer size of the Congo Basin ca.
This book summarizes the geomorphology, geology, geochronology, geophysics and mineral resources of the Congo Basin, one of the world's most enigmatic and poorly understood major intra-continental sedimentary basins, and its flanking areas of Central Africa. But these are also home to an overwhelming percentage of a country's wealth. Thorough airborne geophysical reconnaissance has been extended across most parts of the constituent continents. Discharge of the proto-Congo river systems draining the Congo Basin through the Congo delta was possibly linked to increasingly humid conditions during the mid-Cenozoic and may, in turn, have had significant effect on the global ocean water chemistry. Published age constraints on the kimberlites show Late Cretaceous ages for the Mbuji Mayi kimberlites ~70 Ma and Eocene-Oligocene ages for the Kundelungu kimberlites ~32 Ma. Our objective is to perform a geomorphological and stratigraphical study of the Congo Cuvette and its flanking relief to characterize the Cenozoic landscape evolution of Central Africa and associated vertical movements.
Amalgamation of Gondwana complete at ca. The sheer size of the Congo Basin ca. It provides an up to date analysis of the large region's origin and evolution. The three megacities provide contrasting geological settings but similar urban architecture. The Congo Basin is a large Phanerozoic sedimentary basin with up to 3-6 km of Carboniferous to Triassic sequences, comparable to those of the Karoo Basins of southern Gondwana. This area is therefore an important type section for Central Africa. Pioneering stratigraphic correlations by J.