Mantle source characteristics and melting models for the early-middle Miocene mafic volcanism in Western Anatolia Implications for enrichment processes of mantle lithosphere and origin of K-rich volcanism in post-collisional settings

ERSOY E. Y., Helvaci C., Palmer M. R.

JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, cilt.198, ss.112-128, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 198
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.jvolgeores.2010.08.014
  • Dergi Adı: JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.112-128
  • Anahtar Kelimeler: Western Anatolia, Neogene volcanism, Shoshonitic volcanism, Ultrapotassic volcanism, Subduction enrichment, TRACE-ELEMENT PARTITION, CALC-ALKALINE MAGMATISM, MENDERES-MASSIF, FRACTIONAL CRYSTALLIZATION, GEOCHEMICAL CONSTRAINTS, ISOTOPE GEOCHEMISTRY, BASALTIC MAGMAS, IGNEOUS ROCKS, NW ANATOLIA, SR ISOTOPE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In Western Anatolia early-middle Miocene post-collisional volcanism is represented by K nch volcanic rocks including calc alkaline high-K calc-alkaline shoshonitic and ultrapotasstc products Low-SIO2 and relatively high-MgO mafic volcanic rocks in the region are represented by high-K volcanic rocks (HKVR) in the west where strike-slip tectonics related to the Izmir-Balikesir Transfer Zone dominates while shoshonitic and ultrapotassic volcanic rocks (SHVR and UKVR) occur in the eastern part of the region where mid-crustal units were exhumed along detachment faults during orogenic collapse All three rock groups have nearly identical Sr-Nd Isotope ratios but the SHVR and UKVR are more enriched in incompatible trace elements relative to the HKVR. Comparison of the geochemical characteristics of the most primitive lavas (SiO2<55 wt % Mg#>65 and MgO>6 wt %) provides an important tool in discussing the origin and evolution of the K-rich magmatic activity in this post-orogenic setting