| Autor: |
Borsi, S., Ferrara, G., Innocenti, F., Mazzuoli, R. |
| Zdroj: |
Bulletin of Volcanology; Sep1972, Vol. 36 Issue 3, p473-496, 24p |
| Abstrakt: |
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 (Sr/Sr=0.7121). The calcalkaline suite (16.2-21.5 m.y., mean valueSr/Sr=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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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