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

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

The Iricoumé Group correspond to the most expressive Paleoproterozoic volcanism in the Guyana Shield, Amazonian craton. The volcanics are coeval with Mapuera granitoids, and belong to the Uatumã magmatism. They have U-Pb ages around 1880 Ma, and geochemical signatures of α-type magmas. Iric...

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Bibliographic Details
Main Authors: Ronaldo Pierosan, Evandro F. Lima, Lauro V.S. Nardi, Cristina P. de Campos, Artur C. Bastos Neto, José M.T.M. Ferron, Maurício Prado
Format: Article
Language:English
Published: Academia Brasileira de Ciências 2011-09-01
Series:Anais da Academia Brasileira de Ciências
Subjects:
Craton Amazônico
complexo de caldeira
ignimbrito
vulcanismo Iricoumé
depósitos de surge
magmatismo Uatumã
Amazonian Craton
caldera complex
ignimbrite
Iricoumé volcanism
surge deposits
Uatumã magmatism
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300012

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http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300012

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