E. M. Piccirillo
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View article: Early Proterozoic Calc-Alkaline and Middle Proterozoic Tholeiitic Dyke Swarms from Central–Eastern Argentina: Petrology, Geochemistry, Sr–Nd Isotopes and Tectonic Implications
Early Proterozoic Calc-Alkaline and Middle Proterozoic Tholeiitic Dyke Swarms from Central–Eastern Argentina: Petrology, Geochemistry, Sr–Nd Isotopes and Tectonic Implications Open
The Rio de La Plata craton in Argentina (Azul and Tandil regions) is characterized by Early Proterozoic (2·0 Ga) calc-alkaline and Middle Proterozoic (1·6 Ga) tholeiitic dyke swarms intruding the crystalline basement involved in the Transa…
View article: The Cameroon Volcanic Line Revisited: Petrogenesis of Continental Basaltic Magmas from Lithospheric and Asthenospheric Mantle Sources
The Cameroon Volcanic Line Revisited: Petrogenesis of Continental Basaltic Magmas from Lithospheric and Asthenospheric Mantle Sources Open
The volcanic activity of Mts Bambouto and Oku (Western Highlands) and of the Ngaoundere Plateau, in the continental sector of the Cameroon Volcanic Line, Equatorial West Africa, ranges in age from Oligocene to Recent. It is characterized b…
View article: Potassic and Sodic Igneous Rocks from Eastern Paraguay: their Origin from the Lithospheric Mantle and Genetic Relationships with the Associated Paraná flood tholeiites
Potassic and Sodic Igneous Rocks from Eastern Paraguay: their Origin from the Lithospheric Mantle and Genetic Relationships with the Associated Paraná flood tholeiites Open
Eastern Paraguay represents the westernmost fringe of Early Cretaceous Parana flood tholeiites (Serra Geral Formation SGF). Besides the SGF, eastern Paraguay has been the site of alkaline magmatism since Mesozoic times: (1) Late Permian-Ea…
View article: BIMODAL FISSURAL VOLCANIC SUITES FROM THE PARANÁ BASIN (BRAZIL): K Ar AGE, Sr-ISOTOPES AND GEOCHEMISTRY
BIMODAL FISSURAL VOLCANIC SUITES FROM THE PARANÁ BASIN (BRAZIL): K Ar AGE, Sr-ISOTOPES AND GEOCHEMISTRY Open
As vulcânicas acidas estratificadas de Ourinhos e Piraju (SP parte setentrional da bacia do Parana) sao relativamente ricas em elementos incompativeis (tipo Chapeco) e estao claramente associadas com basaltos toleiticos de alto-Ti (TiOz ma…