Paleoproterozoic andesitic volcanism in the southern Amazonian craton, the Sobreiro Formation: New insights from lithofacies analysis of the volcaniclastic sequences

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• 作者：Matteo Roverato^a ; ^{roteo@hotmail.com} ; Caetano Juliani^a ; Carlos Marcelo Dias-Fernandes^b ; Lucia Capra^c
• 关键词：Paleoproterozoic volcanism ; Lithofacies analyses ; Andesitic volcaniclastic rocks ; Amazonian craton
• 刊名：Precambrian Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：289
• 期：Complete
• 页码：18-30
• 全文大小：8811 K
• 卷排序：289

文摘

Superb preservation of Paleoproterozoic rocks in the Amazon Craton, Brazil. We provide a detailed analyses of the fabric of these ancient deposits. These deposits (Sobreiro F. - 1.88 Ga) are mainly andesitic volcanic and volcaniclastic rocks. We propose here the paleogeographic reconstruction of the Sobreiro volcanism at 1.88 Ga.