The cretaceous low-tio2 tholeiitic dyke swarm from Cabo Frio (southeastern Brazil): Petrological and geochemical aspects - Brotzu, Pietro; Bennio, Lucia; Gomes, Celso B.; Melluso, Leone; Morbidelli, Lucio; Ruberti, Excelso; Traversa, Gianbosco (International Geological Congress, 2000)