Six main volcanic rock groups
that formed at different stages between Eocene to late Upper Miocene were
differentiated in the area, depending on the field and laboratory studies, namely
"Balıklıçeşme volcanics" of Eocene age, "Çan volcanics" of
Oligocene age, "Kirazlı volcanics" of Upper Oligocene age,
"Behram volcanics" of Lower to Middle Miocene age, "Hüseyinfakı
volcanics" of Middle Miocene age and "Ezine volcanics" of Upper
Miocene age. Together with petrographic and geochemical studies, K/Ar dating
and Stronbum/Neodium isotope ratio measurements (87Sr/86Sr and 143Nd/144Nd)
were done on the rocks. Volcanic rocks formed between Eocene and Middle Miocene
were found to be of calc-alcaline, whereas only that formed during Upper
Miocene were of alcaline type. Geochemical and isotopic studies show that the
magma formed the calc-alcaline volcanizm have undergone intense contamination
and got a hybrid character whereas the source of alcali volcanizm is different
and formed by partial melting of a heterogeneous mantle material. The rocks are
related with tectonic regime of the area; calc-alcaline volcanics have been
formed under a compressional regime, but alcaline rocks have been formed under
a tensiona) regime, contranly
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 1 Ekim 1995 |
Yayımlandığı Sayı | Yıl 1995 Cilt: 117 Sayı: 117 |
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