Merhaba Misafir

Petrogenesis of Heiran area submarine lavas in north east of Ardabil, Iran: A case study of Sevan-Akera-Qaradagh Ocean back arc basin

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Heiran area is located in north-west of Ardabil and south west of Caspian Sea. Field evidences indicate submarine volcanic activities in this area. The rocks in this area are of basaltic composition. The outcrops of pillow lavas, prisms, dykes and lava flows in different points are evidences showing the existence of oceanic crust in this area. Studies on other locations of southern margin of Caspian Sea as well as structural and petrological similarities between Heiran and these areas may confirm the fact that Heiran area is part of geo-suture of Caspian Sea southern margin. The submarine lavas in this area are associated in age with late Cretaceous-Eocene. With regard to petrographical characteristics, the rocks under study range from andesitic basalt to olivine basalt and belong to alkaline series. The tectonomagmatic environment of these lavas is related to back arc basin. These magmas originate from subcontinental lithospheric mantle and have formed in a supra subduction environment. During upper Cretaceous-middle Paleogene, the closing of Sevan-Akera-Qaradagh Ocean led to the formation of marginal basin in the form of a back arc basin in the margin of Caspian Sea. The submarine lavas of Heiran area are likely to have originated from the volcanic activities of this marginal basin.

Yayınlandığı Kaynak : International Journal of Earth Sciences Knowledge and Applications (IJESKA)
  • Yıl : 2019
  • Cilt : 1
  • Sayı : 1
  • eISSN : 2687-5993
  • Sayfa Aralığı : 14-22
  • IO Kayıt No : 106920
  • Yayıncı : Ekrem Kalkan