Cordani, Umberto, Heilbron, Monica, Flecha de Alkmim, Fernando (Eds.)
2016, 350 p. 100 illus.
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Examines the tectonic genealogy and development history of the Sao Francisco Craton, a 'miniature continent' located in Eastern Brazil
Provides a panorama of the evolutionary history of a piece of continental lithosphere between the Paleoarchean and the Cenozoic eras
Contains wide range of information from all fields of geology
The region of the São Francisco river valley in eastern Brazil encompasses two main components of the geologic framework of the South American continent: the São Francisco craton and its marginal orogenic belts. Cratons, as the oldest, differentiated and relatively stable pieces of the continental lithosphere, preserve a substantial part of the Earth's memory. Orogenic belts, on the other hand, record collisional processes that occurred during a limited time span. Because of their topographic relief, mountain belts developed along craton margins provide however access to rock successions not exposed in the low lands of the adjacent cratons. The combination of geologic information obtained in cratonic domains and their marginal orogenic belts thus form the basis for deciphering substantial periods of Earth’s history. Corresponding to the most intensively studied portion of the Precambrian nucleus of the South American plate, the São Francisco craton and its margins host a rock record that spans from the Paleoarchean to the Cenozoic. Precambrian sedimentary successions that witness ancient Earth processes - many of them of global significance - are especially well preserved and exposed in this region. With all these attributes the São Francisco craton together with its fringing orogenic belts can be viewed as a ‘Continent within a Continent’ or a ‘Continent en miniature’.
Content Level »Research
Keywords »Continental Lithosphere - Orogenic Belt - Paleoarchean - Sao Francisco Craton - South American Plate
PART I Overview.- The São Francisco craton and its margins.- PART II The craton basement.- The Archean Nuclei at the basement of Sào Francisco craton.- The Paleoproterozoic Eastern Bahia orogenic belt: the basement of the northern São Francisco craton.- The Paleoproterozoic Mineiro belt and the Quadrilátero Ferrífero Ferrífero: The basement of the southern São Francisco craton.- PART III The intracratonic and marginal basins.- The Paramirim aulacogen.- The São Francisco basin.- The Recôncavo-Tucano rift.- The Jequitinhonha, Almada, Camamu and Jacuípe basins.- PART IVThe intraplate Magmatic Episodes.- The Mafic Dike Swarns.- The Alkaline magmatism.- PART V The marginal belts.- The Southern Brasília belt.- The Northern Brasília belt.- The Rio Preto and Riacho do Pontal belts.- The Segipano belt.- The Araçuaí and Ribeira belt.- PART VI Tectonic Synthesis.- Tectonic evolution of the São Francisco craton and its margin.