The study area is
located in the Eastern Pontides between Rize, Çayeli, Arhavi, İspir and
İkizdere. In this area, Maçka Tectonic Slice (MTS) and Taşköprü Tectonic Slice
(TTS) are exposed. MTS is composed from old to young; Late Jurassic-Early
Cretaceous limestone (Berdiga fm.); Turonian- Santonian conglomerate,
sandstone, micritic limestone, siltstone, marl, basaltic,
basaltic-andesitic lava, pyroclastites (Çatak fm.); Santonian rhyolitic,
dacitic lava, pyroclastites, sandstone, clayey limestone (Kızılkaya fm.); late
Santonian-Campanian basaltic, andesitic lava, pyroclastites, sandstone, clayey
limestone (Caglayan fm.); Campanian-Mastrihtian rhyolitic, dacitic lava,
pyroclastites, sandstone, clayey limestone (Çayırbağ fm.);late
Maastrichtian-Danian sandstone, claystone, tuff, marl, clayey limestone
(Cankurtaran fm.). Sedimentary, volcanosedimentary units in the Late
Paleocene-Quaternary range (Erenler, Kaplıca, Melyat, Pazar, Hamidiye
formations, and Handüzü, Çağırankaya volcanites) unconformably overlies the
MTS. In the study area, Turonian- Maastrichtian basaltic andesitic lavaş,
pyroclastites and sandstone, micritic limestone, claystone units (Yağmurdere
fm.) belonging to TTS are observed, and Early-Middle Eocene sedimentary and
volcanosedimentary units (Yedigöze, Çoruh formations) unconformably overlies
the TTS. According to Ar/Ar dating, Çayırbağ formation was determined as
83.2±1.0 Ma, Melyat formation as 47.8±1.6 Ma, and Handüzü volcanics as
4.25±0.55 Ma for andesite level and as 3.93±0.46 Ma for dacite level. The MTS was
intruded by Cretaceous-Paleocene Kaçkar granitoid I, Eocene Kaçkar granitoid
II, Late Eocene Ardeşen gabbro, while the TTS was intruded by
Cretaceous-Paleocene Kaçkar granitoid-I, Late Eocene Güllübağ monzonite.
Eastern pontides Maçka tectonic slice Taşköprü tectonic slice tectono- stratigraphy magmatism
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 25 Nisan 2019 |
Yayımlandığı Sayı | Yıl 2019 Cilt: 158 Sayı: 158 |
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