Geochemistry and geochronology of orthogneisses in the derbent (Alasehir) area, eastern part of the Odemis-Kiraz submassif, Menderes Massif: Pan-African magmatic activity

KORALAY O. E., Dora O., Chen F., Satir M., CANDAN O.

TURKISH JOURNAL OF EARTH SCIENCES, cilt.13, sa.1, ss.37-61, 2004 (SCI-Expanded, Scopus, TRDizin) identifier identifier

  • Yayın Türü: Makale / Derleme
  • Cilt numarası: 13 Sayı: 1
  • Basım Tarihi: 2004
  • Dergi Adı: TURKISH JOURNAL OF EARTH SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.37-61
  • Anahtar Kelimeler: orthogneiss, geochemistry, Pb-Pb zircon dating, Pan-African, Menderes Massif, Turkey
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Pan-African basement rocks and the Palaeozoic cover series of the Menderes Massif are exposed around Derbent (Alasehir) in the eastern part of the Odemis-Kiraz submassif. Garnet-mica schists of the Pan-African basement are intruded by the protoliths of orthogneisses and Triassic leucocratic orthogneisses. This study focuses on the geochronology and geochemistry of orthogneisses related to the Pan-African evolution of the Menderes Massif in latest Proterozoic time. Geochemical data suggest that the orthogneisses were derived from S-type, peraluminous, syn- to post-collisional granitoids of calc-alkaline affinity. Zircon grains from the orthogneisses, which are euhedral with typical igneous morphologies, were dated by the Pb-Pb evaporation method. Single zircon ages of two samples yielded Pb-207/Pb-206 ages of 561.5 +/- 1.8 Ma and 570.5 +/- 2.2 Ma. These ages are interpreted as the time of protolith emplacement of the orthogneisses. This major magmatic episode of the Menderes Massif can be attributed the Pan-African