74 documents found, page 1 of 8
Petrology of the tephrite-phonolite suite and cognate xenoliths of the Fortalez...
Macciotta, Giampaolo; Almeida, Afonso; Barbieri, Mario; Beccaluva, Luigi; Brotzu, Piero; Coltorti, Massimo; Conte, Aida; Garbarino, CarloThe alkaline district of Fortaleza (Cearä, Brazil) consists of a number of phonotephritic plugs, domes, and dykes cropping out in the Precambrian basement, aged around 30 Ma.Chemically and petrographically the rocks range in composition from tephrites and phonolitic tephrites to peralkaline phonolites. At one locality (Caruru), olivine clinopyroxenite, essexite, and nepheline syenite xenoliths of cognate origin...
Relações de contato entre rochas alcalinas máficas e sieníticas na Praia do Jab...
Gomes, Celso B.
Petrographic, geochemical and isotopic evidence of crustal assimilation process...
Gomes, Celso B.
Evidências petrográficas, geoquímicas e isotópicas de processos de assimilação ...
Gomes, Celso B.
Eudialyte-group minerals from the Monte de Trigo alkaline suite, Brazil: compos...
Gomes, Celso B.
The Early Triassic magmatism of the Alto Paraguay Province, Central South Ameri...
Gomes, Celso B.
Preface — A special issue (Part-I): Mafic-ultramafic rocks and alkaline-carbona...
Gomes, Celso B.
Carbonatites and primary carbonates in the Rio Apa and Amambay regions, NE Para...
Gomes, Celso B.
The Banhadão Alkaline Complex, Southeastern Brazil: source and evolution of pot...
Gomes, Celso B.