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| Format: | Artículo científico |
| Language: | en |
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Universitat de Barcelona
2017
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| Online Access: | https://www.redalyc.org/articulo.oa?id=50551303003 https://www.redalyc.org/journal/505/50551303003/ https://www.redalyc.org/journal/505/50551303003/html/ https://www.redalyc.org/journal/505/50551303003/50551303003.epub https://www.redalyc.org/journal/505/50551303003/movil |
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| author | S. DICLE |
| author_facet | S. DICLE |
| contents | New active faults on Eurasian-Arabian collision zone: Tectonic activity of Özyurt and Gülsünler faults (eastern Anatolian Plateau, Van-Turkey) S. DICLE S. ÜNER Ciencias de la Tierra Lake Van Basin Quaternary faults Kinematic analysis Compressional tectonics Eastern Anatolia Plateau In northeasterThe Eastern Anatolian Plateau emerges from the continental collision between Arabian and Eurasian plates where intense seismicity related to the ongoing convergence characterizes the southern part of the plateau. Active deformation in this zone is shared by mainly thrust and strike-slip faults. The Özyurt thrust fault and the Gülsünler sinistral strike-slip fault are newly determined fault zones, located to the north of Van city centre. Different types of faults such as thrust, normal and strike-slip faults are observed on the quarry wall excavated in Quaternary ODFXVWULQHGHSRVLWVDWWKHLQWHUVHFWLRQ]RQHRIWKHVHWZRIDXOWV.LQHPDWLFDQDO\VLVRIIDXOWVOLSGDWDKDVUHYHDOHG coeval activities of transtensional and compressional structures for the Lake Van Basin. Seismological and geomorphological characteristics of these faults demonstrate the capability of devastating earthquakes for the area. Mexico, volcanic rocks interbedded with Late Triassic–Jurassic siliciclastic and evaporitic strata have been linked to magmatic arcs developed in the Pangea western margin during its initial phase of fragmentation. This work provides new petrographic and geochemical data for volcanism included in the El Alamar and Minas Viejas formations outcropping in the Galeana region. Andesitic dykes and sills (n= 10) in the El Alamar redbeds show SiO 2 = 47.5–59.1% and MgO= 1.2–4.2%, as well as a geochemical affinity to island arc magmas. This work represents the first report of this tectonic setting in the region. Geological and petrographic evidence suggest that this arc system likely developed after ~220 and before ~193Ma. Trachy-andesitic and rhyodacitic domes (n= 20) associated with the Minas Viejas gypsum-carbonates sequence show SiO 2 = 61.8–82.7% and MgO= 0.1–4.0% with a tectonic affinity to continental arc. A rhyodacite sample from this region has been dated by U-Pb in zircon, yielding an age of 149.4 ± 1.2Ma (n= 21), being the youngest age related to this arc. Finally, we propose a three- step model to explain the tectonic evolution from Late Triassic island arc to Jurassic continental arc system in the northeastern Mexico. 2017 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50551303003 https://www.redalyc.org/journal/505/50551303003/ https://www.redalyc.org/journal/505/50551303003/html/ https://www.redalyc.org/journal/505/50551303003/50551303003.epub https://www.redalyc.org/journal/505/50551303003/movil en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.2 Vol.15 |
| format | Artículo científico |
| id | redalyc_50551303003 |
| language | en |
| publishDate | 2017 |
| publisher | Universitat de Barcelona |
| spellingShingle | New active faults on Eurasian-Arabian collision zone: Tectonic activity of Özyurt and Gülsünler faults (eastern Anatolian Plateau, Van-Turkey) S. DICLE Ciencias de la Tierra Lake Van Basin Quaternary faults Kinematic analysis Compressional tectonics Eastern Anatolia Plateau New active faults on Eurasian-Arabian collision zone: Tectonic activity of Özyurt and Gülsünler faults (eastern Anatolian Plateau, Van-Turkey) S. DICLE S. ÜNER Ciencias de la Tierra Lake Van Basin Quaternary faults Kinematic analysis Compressional tectonics Eastern Anatolia Plateau In northeasterThe Eastern Anatolian Plateau emerges from the continental collision between Arabian and Eurasian plates where intense seismicity related to the ongoing convergence characterizes the southern part of the plateau. Active deformation in this zone is shared by mainly thrust and strike-slip faults. The Özyurt thrust fault and the Gülsünler sinistral strike-slip fault are newly determined fault zones, located to the north of Van city centre. Different types of faults such as thrust, normal and strike-slip faults are observed on the quarry wall excavated in Quaternary ODFXVWULQHGHSRVLWVDWWKHLQWHUVHFWLRQ]RQHRIWKHVHWZRIDXOWV.LQHPDWLFDQDO\VLVRIIDXOWVOLSGDWDKDVUHYHDOHG coeval activities of transtensional and compressional structures for the Lake Van Basin. Seismological and geomorphological characteristics of these faults demonstrate the capability of devastating earthquakes for the area. Mexico, volcanic rocks interbedded with Late Triassic–Jurassic siliciclastic and evaporitic strata have been linked to magmatic arcs developed in the Pangea western margin during its initial phase of fragmentation. This work provides new petrographic and geochemical data for volcanism included in the El Alamar and Minas Viejas formations outcropping in the Galeana region. Andesitic dykes and sills (n= 10) in the El Alamar redbeds show SiO 2 = 47.5–59.1% and MgO= 1.2–4.2%, as well as a geochemical affinity to island arc magmas. This work represents the first report of this tectonic setting in the region. Geological and petrographic evidence suggest that this arc system likely developed after ~220 and before ~193Ma. Trachy-andesitic and rhyodacitic domes (n= 20) associated with the Minas Viejas gypsum-carbonates sequence show SiO 2 = 61.8–82.7% and MgO= 0.1–4.0% with a tectonic affinity to continental arc. A rhyodacite sample from this region has been dated by U-Pb in zircon, yielding an age of 149.4 ± 1.2Ma (n= 21), being the youngest age related to this arc. Finally, we propose a three- step model to explain the tectonic evolution from Late Triassic island arc to Jurassic continental arc system in the northeastern Mexico. 2017 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50551303003 https://www.redalyc.org/journal/505/50551303003/ https://www.redalyc.org/journal/505/50551303003/html/ https://www.redalyc.org/journal/505/50551303003/50551303003.epub https://www.redalyc.org/journal/505/50551303003/movil en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.2 Vol.15 |
| title | New active faults on Eurasian-Arabian collision zone: Tectonic activity of Özyurt and Gülsünler faults (eastern Anatolian Plateau, Van-Turkey) |
| topic | Ciencias de la Tierra Lake Van Basin Quaternary faults Kinematic analysis Compressional tectonics Eastern Anatolia Plateau |
| url | https://www.redalyc.org/articulo.oa?id=50551303003 https://www.redalyc.org/journal/505/50551303003/ https://www.redalyc.org/journal/505/50551303003/html/ https://www.redalyc.org/journal/505/50551303003/50551303003.epub https://www.redalyc.org/journal/505/50551303003/movil |