دورية أكاديمية
Explosive Volcanism in a tuff-dominated Intraplate Setting, Sarmiento Formation (Middle Eocene- lower Miocene), Patagonia Argentina
| العنوان: | Explosive Volcanism in a tuff-dominated Intraplate Setting, Sarmiento Formation (Middle Eocene- lower Miocene), Patagonia Argentina |
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| المؤلفون: | José Matildo Paredes, Ferrán Colombo, Nicolás Foix, José Oscar Allard, Adriana Nillni, Mariana Allo |
| المصدر: | Latin American Journal of Sedimentology and Basin Analysis, Vol 15, Iss 2 (2021) |
| بيانات النشر: | Asociación Argentina de Sedimentología, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Geology LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | Volcanismo de intraplaca, Depósitos volcanosedimentarios, Bombas basálticas, Terciario medio, Patagonia Argentina, Geology, QE1-996.5, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | The Sarmiento Formation (middle Eocene to early Miocene) represents the distal record of the activity of the Andean volcanic arc in central Patagonia, mainly dominated by accumulation and reworking of fine ash in a low-gradient continental setting. Intraplate volcanism takes place in the Golfo San Jorge Basin during the deposition of the Sarmiento Formation, and shallow intrusives and basaltic lava flows occurs. An exposure of basaltic volcaniclastic deposits was analyzed in the proximity of the Cerro Dragón intrusive rocks. These deposits consist of eight volcaniclastic lithofacies, organized in three distinct lithofacies association: volcaniclastic debris flow (lahar), base surge, and scoriaceous breccias of a strombolian-style eruption. Explosive volcanism is evidenced by the fallout of ballistic bombs over base surge and scoriaceous deposits, which produced bedding sags in the plastic lapilli. These deposits constitute the first published record of explosive volcanism (Strombolian) associated to the emplacement of the Oligocene alkaline volcanic rocks in the Golfo San Jorge Basin, generally considered as subintrusive or hypabissal intrusions. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Spanish; Castilian Portuguese |
| تدمد: | 1669-7316 1851-4979 |
| Relation: | https://lajsba.sedimentologia.org.ar/index.php/lajsba/article/view/159; https://doaj.org/toc/1669-7316; https://doaj.org/toc/1851-4979 |
| URL الوصول: | https://doaj.org/article/434c74d0a3a6426c9a5e0976e36925bc |
| رقم الأكسشن: | edsdoj.434c74d0a3a6426c9a5e0976e36925bc |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16697316 18514979 |
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