Browsing Exact and Earth Sciences by Subject "Vulcanismo"
Now showing items 1-4 of 4
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Paleoproterozoic (~1.88Ga) felsic volcanism of the Iricoumé Group in the Pitinga Mining District area, Amazonian Craton, Brazil : insights in ancient volcanic processes from field and petrologic data
(2011) [Journal article]O Grupo Iricoumé corresponde ao mais expressivo vulcanismo Paleoproterozóico do Escudo das Guianas, craton Amazônico. As rochas vulcânicas são coexistentes com os granitóides Mapuera, e pertencem ao magmatismo Uatumã. ... -
The Mato Perso Conduit System: evidence of silicic magma transport in the southern portion of the Paraná-Etendeka LIP, Brazil
(2017) [Journal article]The Mato Perso Conduit System is described from a ~ 120 km2 area in south Brazil exposing silicic volcanics of the Paraná-Etendeka LIP. A volcanic succession is defined by basaltic flows covered by flat-lying oxidized ... -
Vulcanismo félsico paleoproterozóico do Grupo Iricoumé, domínio Erepecuru-Trombetas, província Amazônia central : dados de campo, caracterização petrográfica e geocronologia Pb-Pb em zircão
(2013) [Journal article]O Grupo Iricoumé compreende rochas vulcânicas efusivas e piroclásticas, com texturas e estruturas bastante preservadas, que pertence a um extenso evento vulcano-plutônico que marcou a região central do Cráton Amazônico ... -
Zircon U-Pb geochronology, Sm-Nd and Pb-Pb isotope systematics of Ediacaran post-collisional high-silica Acampamento Velho volcanism at the Tupanci area, NW of the Sul-Rio-Grandense Shield, Brazil
(2017) [Journal article]We present new U-Pb zircon ages and Sm-Nd-Pb isotopic data for volcanic and hypabyssal acid rocks from the northernmost exposure of the Acampamento Velho Formation in the NW portion of the Sul-Rio-Grandense Shield, Brazil. ...