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Tassé, Normand, Gauthier, Nicole, Lajoie, Jean, Gélinas, Léopold (1982) Les volcaniclastites du complexe rhyolitique du Cap d'Ours, Rouyn-Noranda, Québec : exemples des mécanismes de fragmentation et de mise en place dans le volcanisme felsique. Canadian Journal of Earth Sciences, 19 (7) 1337-1349 doi:10.1139/e82-116

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Reference TypeJournal (article/letter/editorial)
TitleLes volcaniclastites du complexe rhyolitique du Cap d'Ours, Rouyn-Noranda, Québec : exemples des mécanismes de fragmentation et de mise en place dans le volcanisme felsique
JournalCanadian Journal of Earth Sciences
AuthorsTassé, NormandAuthor
Gauthier, NicoleAuthor
Lajoie, JeanAuthor
Gélinas, LéopoldAuthor
Year1982 (July 1)Volume19
Issue7
PublisherCanadian Science Publishing
DOIdoi:10.1139/e82-116Search in ResearchGate
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Mindat Ref. ID477555Long-form Identifiermindat:1:5:477555:7
GUID0
Full ReferenceTassé, Normand, Gauthier, Nicole, Lajoie, Jean, Gélinas, Léopold (1982) Les volcaniclastites du complexe rhyolitique du Cap d'Ours, Rouyn-Noranda, Québec : exemples des mécanismes de fragmentation et de mise en place dans le volcanisme felsique. Canadian Journal of Earth Sciences, 19 (7) 1337-1349 doi:10.1139/e82-116
Plain TextTassé, Normand, Gauthier, Nicole, Lajoie, Jean, Gélinas, Léopold (1982) Les volcaniclastites du complexe rhyolitique du Cap d'Ours, Rouyn-Noranda, Québec : exemples des mécanismes de fragmentation et de mise en place dans le volcanisme felsique. Canadian Journal of Earth Sciences, 19 (7) 1337-1349 doi:10.1139/e82-116
In(1982, July) Canadian Journal of Earth Sciences Vol. 19 (7) Canadian Science Publishing
Abstract/Notes The Cap d'Ours Complex in the Rouyn area, previously named the Glenwood Rhyolite, includes three types of rhyolitic volcanoclastites. Pyroclastites make up approximately half of the volcanoclastites; they are characterized by deposits with poor stratification and massive appearance, by aphanitic or pumiceous porphyric rhyolite blocks and lapilli, and by an association with variable proportions of pumice and shards. They seem to result from accumulated laminar flows similar to debris flows. The alloclastites form about one third of the volcanoclastites; they show several features common to the pyroclastites (stratified appearance, graded bedding, mixed source materials). However, some key parts of the outcrop indicate fragmentation in place, supporting the interpretation of a dome fragmented in situ and partially reworked. The autoclastites make up the remaining volcanoclastites. They are represented by flow breccia characterized by a progressive transition from a fragmented to a massive rhyolite. The Cap d'Ours Complex rhyolites form an arrangement of volcanoclastic components much more complex than described previously. In a single site occupying less than [Formula: see text], there are at least three types of volcanoclastites formed by different volcanic processes as varied as the eruption of pyroclastic and magmatic flows, and the injection and destruction of a dome or a spine. [Journal Translation]


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