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Intracontinental Plio-Quaternary volcanism along the African-Anatolian plate boundary, southern Turkey

Published inOfioliti, vol. 22, no. 1, p. 111-117
Publication date1997
Abstract

Plio-Quaternary volcanics crop out along the African-Anatolian plate boundary in southern Turkey. NE-SW trending sinistral strike-slip fault systems controlling this volcanism have resulted from the of continuous compressional tectonic regime at the K. Maras triple junction (southern Turkey), where the collision of the African-Arabian and Anatolian plates occurs. As a result, intracontinental basaltic volcanic have erupted within the transtensional zones oriented along the strike of the main fault. Massive basaltic lava flows displaying columnar jointing are often intercalated with agglomerates and tuffs. Volcanic rocks are represented by olivine alkali basalts (Na₂O+K₂O=4-7 %). These basaltic rocks exhibit high TiO₂ (2-3%) and low SiO₂ (43-48%) values. The clinopyroxene compositions (high TiO₂, CaO and Al₂O₃) also confirm their alkaline affinity. Tectonomagmatic discrimination diagrams based on major and trace element geochemistry suggest that these volcanic rocks belong to the within-plate basalt environment. REE geochemistry shows LREE enrichment indicating typical intracontinental alkaline basaltic volcanism.

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Keywords
  • Intracontinental volcanism
  • African-Anatolian plate
  • Basalt
  • Turkey
Citation (ISO format)
PARLAK, Osman et al. Intracontinental Plio-Quaternary volcanism along the African-Anatolian plate boundary, southern Turkey. In: Ofioliti, 1997, vol. 22, n° 1, p. 111–117.
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  • PID : unige:157649
ISSN of the journal0391-2612
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