Stratigraphy of the Roraima Supergroup along the Brazil-Guyana border in the Guiana shield, Northern Amazonian Craton - results of the Brazil-Guyana Geology and Geodiversity Mapping Project

The Geological and Geodiversity Mapping binational program along the Brazil-Guyana border zone allowed reviewing and integrating the stratigraphy and nomenclature of the Roraima Supergroup along the Pakaraima Sedimentary Block present in northeastern Brazil and western Guyana. The area mapped corres...

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Veröffentlicht in:Brazilian journal of geology 2017-03, Vol.47 (1), p.43-57
Hauptverfasser: Reis, Nelson Joaquim, Nadeau, Serge, Fraga, Leda Maria, Betiollo, Leandro Menezes, Faraco, Maria Telma Lins, Reece, Jimmy, Lachhman, Deokumar, Ault, Randy
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Sprache:eng
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Zusammenfassung:The Geological and Geodiversity Mapping binational program along the Brazil-Guyana border zone allowed reviewing and integrating the stratigraphy and nomenclature of the Roraima Supergroup along the Pakaraima Sedimentary Block present in northeastern Brazil and western Guyana. The area mapped corresponds to a buffer zone of approximately 25 km in width on both sides of the border, of a region extending along the Maú-Ireng River between Mount Roraima (the triple-border region) and Mutum Village in Brazil and Monkey Mountain in Guyana. The south border of the Roraima basin is overlain exclusively by effusive and volcaniclastic rocks of the Surumu Group of Brazil and its correlated equivalent the Burro-Burro Group of Guyana. RESUMO: O programa binacional de Mapeamento Geológico e da Geodiversidade na fronteira Brasil-Güiana possibilitou a revisão e integração da nomenclatura estratigráfica do Supergrupo Roraima ao longo do Bloco Pacaraima nas regiões extremo norte brasileira e ocidental guianense. A área corresponde a um buffer de aproximados 25 quilômetros a partir da fronteira, em um trecho definido pelo Monte Roraima (região de tríplice fronteira) e vizinhanças da vila Mutum, no Brasil, e serra Monkey, na Guiana, ao longo do rio Maú ou Ireng. O flanco sul da bacia assenta exclusivamente em rochas efusivas e vulcanoclásticas dos correlatos grupos Surumu e Burro-Burro.
ISSN:2317-4889
2317-4692
2317-4889
DOI:10.1590/2317-4889201720160139