Portal de Periódicos da CAPES

Revisão Produção Nacional Revisado por pares

BIBTEX RIS

The mineral resources of the Borborema Province in Northeastern Brazil and its sedimentary cover: a review

1995; Elsevier BV; Volume: 8; Issue: 3-4 Linguagem: Inglês

10.1016/0895-9811(95)00020-g

1873-0647

Hartmut Beurlen,

Geochemistry and Elemental Analysis

Abstract The geotectonic Borborema Province in Northeast Brazil includes several NE-trending Proterozoic metamorphic belts which amalgamate some small older massifs. It has been known since the Second World War for the skarn-hosted scheelite mineralization and the TaLiBeSn-bearing pegmatites of the Serido Region. With the drastic drop of the international tungsten prices, three mines were closed in the last decade and only the state-owned Bodo Mine remains working. Since 1961, when Brazilian universities begun to graduate geologists, several dozen mineral deposits were discovered and older prospects were reevaluated. These include the copper deposits of Aurora-State of Ceara (CE) and Serrote da Lage-State of Alagoas (AL), the nickel deposits of S. Joao do Piaui-State of Piaui (PI), the uranium deposits of Itataia-CE, a dozen gold prospects, the ilmenite deposit of Floresta-State of Pernambuco (PE), the vermiculite mine of Paulistana-PI, and the export quality granite at Bom Jardim-PE and Sume-Congo-State of Paraiba (PB). In the mostly Cretaceous or Cainozoic sedimentary cover, the discovery includes two important oil and gas fields ((Carmopolis-State of Sergipe (SE) and Mossoro-Macau-State of Rio Grande do Norte (RN)); deposits of sulphur (Castanhal-SE), of KNaMg, salts (Carmopolis-SE, Sto. Antonio-AL), of phosphate (Olinda-PE and Joao Pessoa-PB), of gypsum (Araripe-PE/CE), of bentonite (Boa Vista-PB) and the Ti placers at Mataraca-PB. In the following pages the current knowledge about these deposits is summarized.