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Bulletin Volcanologique

, 36:473 | Cite as

Geochronology and petrology of recent volcanics in the eastern Aegean Sea (West Anatolia and Lesvos Island)

  • S. Borsi
  • G. Ferrara
  • F. Innocenti
  • R. Mazzuoli
Article

Abstract

During the lower and middle Miocene the western Anatolia and the eastern Aegean Sea were dominated by a calcalkaline volcanism associated with minor acid and basic volcanics. The basic subcrustal volcanics consist mainly of alkali basalts and hawaiites (9.7–11.9 m.y.), nepheline hawaiites and nepheline trachyandesites (Kula area from 1.1 m.y. to the recent times). The rhyolitic volcanics (12.5 m.y.) derived by a partial melting process in the upper crust (87Sr/86Sr=0.7121). The calcalkaline suite (16.2–21.5 m.y., mean value87Sr/86Sr=0.708) shows a trend from latite-andesites to dacites and rhyodacites; a latite andesite system related to a sinking slab of lithosphere and constituted by a mixing of oceanic crust (tholeiite), oceanic sediments and/or tectonic fragments of sialic crust is envisaged.

Keywords

Lava Flow Lava Dome Isochron Sialic Crust Partial Melting Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Stabilimento Tipografico Francesco Gianninni & Figli 1972

Authors and Affiliations

  • S. Borsi
    • 1
  • G. Ferrara
    • 2
  • F. Innocenti
    • 3
  • R. Mazzuoli
    • 3
  1. 1.Laboratorio di Geologia Nucleare dell’UniversitàPisaItaly
  2. 2.Laboratorio per Ricerche Radiometriche applicate alla Geocronologia e alla Paleoecologia del C.N.R.PisaItaly
  3. 3.Istituto di Mineralogia e Petrografia dell’UniversitàPisaItaly

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