Magmatic processes and mixing origin of andesite: Miocene Karamagara volcanics, central Anatolia, Turkey


Alpaslan M., Ekici T. , Otlu N. , Boztug D., Temel A.

GEOLOGICAL JOURNAL, cilt.40, ss.193-214, 2005 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 40 Konu: 2
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1002/gj.1002
  • Dergi Adı: GEOLOGICAL JOURNAL
  • Sayfa Sayıları: ss.193-214

Özet

The Miocene Karamagara volcanics (KMV) crop out in the Saraykent region (Yozgat) of Central Anatolia. The KMV include four principal magmatic components based on their petrography and compositional features: basaltic andesites (KMB); enclaves (KME); andesites (KMA); and dacites (KMD). Rounded and ellipsoidal enclaves occur in the andesites, ranging in diameter from a few millimetres to ten centimetres. A non-cognate origin for the enclaves is suggested due to their mineralogical dissimilarity to the enclosing andesites. The enclaves range in composition from basaltic andesite to andesite. Major and trace element data and primitive mantle-normalized rare-earth element (REE) patterns of the KMV exhibit the effects of fractional crystallization on the evolution of the KME which are the product of mantle-derived magma.