BASALTIC EXPLOSIVE VOLCANISM IN A TUFF-DOMINATED INTRAPLATE SETTING, SARMIENTO FORMATION (MIDDLE EOCENE- LOWER MIOCENE), PATAGONIA ARGENTINA
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| Format: | Artículo científico |
| Langue: | en |
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Asociación Argentina de Sedimentología
2008
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| _version_ | 1876477278739759104 |
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| author | José Matildo PAREDES |
| author_facet | José Matildo PAREDES |
| contents | BASALTIC EXPLOSIVE VOLCANISM IN A TUFF-DOMINATED INTRAPLATE SETTING, SARMIENTO FORMATION (MIDDLE EOCENE- LOWER MIOCENE), PATAGONIA ARGENTINA José Matildo PAREDES Ferrán COLOMBO Nicolás FOIX José Oscar ALLARD Adriana NILLNI Mariana ALLO Ciencias de la Tierra basaltic bombs middle Tertiary Patagonia Argentina Intraplate volcanism volcano sedimentary deposits The Sarmiento Formation (middle Eocene to early Miocene) represents the distal recordof the activity of the Andean volcanic arc in central Patagonia, mainly dominated by accumulationand reworking of fine ash in a low-gradient continental setting. Intraplate volcanism takes place inthe Golfo San Jorge Basin during the deposition of the Sarmiento Formation, and shallow intrusivesand basaltic lava flows occurs. An exposure of basaltic volcaniclastic deposits was analyzed in theproximity of the Cerro Dragón intrusive rocks. These deposits consist of eight volcaniclasticlithofacies, organized in three distinct lithofacies association: volcaniclastic debris flow (lahar),base surge, and scoriaceous breccias of a strombolian-style eruption. Explosive volcanism isevidenced by the fallout of ballistic bombs over base surge and scoriaceous deposits, which producedbedding sags in the plastic lapilli. These deposits constitute the first published record of explosivevolcanism (Strombolian) associated to the emplacement of the Oligocene alkaline volcanic rocks inthe Golfo San Jorge Basin, generally considered as subintrusive or hypabissal intrusions. 2008 artículo científico 1851-4979 https://www.redalyc.org/articulo.oa?id=381740362001 en http://www.redalyc.org/revista.oa?id=3817 Latin American Journal of Sedimentology and Basin Analysis application/pdf Asociación Argentina de Sedimentología Latin American Journal of Sedimentology and Basin Analysis (Argentina) Num.2 Vol.15 |
| format | Artículo científico |
| id | redalyc_381740362001 |
| institution | Redalyc |
| language | en |
| publishDate | 2008 |
| publisher | Asociación Argentina de Sedimentología |
| spellingShingle | BASALTIC EXPLOSIVE VOLCANISM IN A TUFF-DOMINATED INTRAPLATE SETTING, SARMIENTO FORMATION (MIDDLE EOCENE- LOWER MIOCENE), PATAGONIA ARGENTINA José Matildo PAREDES Ciencias de la Tierra basaltic bombs middle Tertiary Patagonia Argentina Intraplate volcanism volcano sedimentary deposits BASALTIC EXPLOSIVE VOLCANISM IN A TUFF-DOMINATED INTRAPLATE SETTING, SARMIENTO FORMATION (MIDDLE EOCENE- LOWER MIOCENE), PATAGONIA ARGENTINA José Matildo PAREDES Ferrán COLOMBO Nicolás FOIX José Oscar ALLARD Adriana NILLNI Mariana ALLO Ciencias de la Tierra basaltic bombs middle Tertiary Patagonia Argentina Intraplate volcanism volcano sedimentary deposits The Sarmiento Formation (middle Eocene to early Miocene) represents the distal recordof the activity of the Andean volcanic arc in central Patagonia, mainly dominated by accumulationand reworking of fine ash in a low-gradient continental setting. Intraplate volcanism takes place inthe Golfo San Jorge Basin during the deposition of the Sarmiento Formation, and shallow intrusivesand basaltic lava flows occurs. An exposure of basaltic volcaniclastic deposits was analyzed in theproximity of the Cerro Dragón intrusive rocks. These deposits consist of eight volcaniclasticlithofacies, organized in three distinct lithofacies association: volcaniclastic debris flow (lahar),base surge, and scoriaceous breccias of a strombolian-style eruption. Explosive volcanism isevidenced by the fallout of ballistic bombs over base surge and scoriaceous deposits, which producedbedding sags in the plastic lapilli. These deposits constitute the first published record of explosivevolcanism (Strombolian) associated to the emplacement of the Oligocene alkaline volcanic rocks inthe Golfo San Jorge Basin, generally considered as subintrusive or hypabissal intrusions. 2008 artículo científico 1851-4979 https://www.redalyc.org/articulo.oa?id=381740362001 en http://www.redalyc.org/revista.oa?id=3817 Latin American Journal of Sedimentology and Basin Analysis application/pdf Asociación Argentina de Sedimentología Latin American Journal of Sedimentology and Basin Analysis (Argentina) Num.2 Vol.15 |
| title | BASALTIC EXPLOSIVE VOLCANISM IN A TUFF-DOMINATED INTRAPLATE SETTING, SARMIENTO FORMATION (MIDDLE EOCENE- LOWER MIOCENE), PATAGONIA ARGENTINA |
| topic | Ciencias de la Tierra basaltic bombs middle Tertiary Patagonia Argentina Intraplate volcanism volcano sedimentary deposits |
| url | https://www.redalyc.org/articulo.oa?id=381740362001 |