The transition from subduction-related to intraplate Neogene magmatism in the Western Anatolia and Aegean area


Agostini S., Doglioni C., Innocenti F., Manetti P., Tonarini S., Savascin M. Y.

CENOZOIC VOLCANISM IN THE MEDITERRANEAN AREA, vol.418, pp.1-15, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 418
  • Publication Date: 2007
  • Doi Number: 10.1130/2007.2418(01)
  • Journal Name: CENOZOIC VOLCANISM IN THE MEDITERRANEAN AREA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Compendex, Geobase
  • Page Numbers: pp.1-15
  • Keywords: alkali basalts, intraplate volcanism, isotope geochemistry, petrology, geodynamics, MEXICAN VOLCANIC BELT, ISLAND BASALT-TYPE, ISOTOPIC CONSTRAINTS, QUATERNARY VOLCANISM, MAGNESIAN ANDESITES, ALKALINE VOLCANISM, BORON ISOTOPE, EVOLUTION, TURKEY, MANTLE
  • Dokuz Eylül University Affiliated: Yes

Abstract

During the Late Miocene to Pleistocene, Western Anatolia and the Aegean area were affected by scattered alkali basaltic activity that was temporally distinct from the older orogenic magmatism related to the subduction of Africa beneath the Anatolian and Aegean plates. On the basis of geochemical and isotopic data, two groups of alkali basalts have been distinguished. The first group (Foca, Urla, Selendi, Samos, Chios, Patmos, and Psathoura) exhibits a wide variability in isotopic composition ((87)Sr/(86)Sr 0.7043-0.7079; (143)Nd/(144)Nd 0.51278-0.51243) and trace-element distribution (Th/Ta 2.4-12.3; Ba/Nb 14-49) probably acquired from a subduction-related component. The second group (Kula, Biga, Kalogeri, and Thrace), on the other hand, retains typical intraplate features with no subduction-related imprinting ((87)Sr/(86)Sr 0.7031-0.7035; (143)Nd/(144)Nd 0.5130-0.51275; Th/Ta 1.2-1.7; Ba/Nb 5-10).