Sedimentary sequences and tectonics of centeral 'part of Gelibolu Peninsula, Nortwest Anatolia, Turkey
Öz
Sedimentary sequence in the study area is lateral eguivalent of sedimentary sequence in Trakya Basin. The deposition of the sedimentary rocks in Trakya Basin commenced in Middle Eocene whereas in Gelibolu Peninsula started in Early Eocene. · The sedimentary sequence shows a characteristic transgressive-regressive cycle with shallow and deepth water sediments. There are five sedimentary sequences, which are differed from each other by disconformities, in the study area. These are: (1) Late CretaceousPaleocene sedimentary sequence without not giving outcrops at the base and ending regressively the t.op, (2) Early Eocene sedimentary sequence begining with transgression and ending with regression, (3) Middle-Late Eocene and Middle-Late Oligocene sedimentary sequence commencing with transgression and ending with regression, (4) Locally marine and terrestrial Middle-Late Miocene sedimentary sequence and, (5) Terrestrial Late Pliocene sedimentary sequence. Post Late Cretaceous-Paleocene Pre Miocene sedimentary sequence have been deposited controlling with under the influence of epirogenic events Early Eocene sequence rest conformabl over the Late Cretaceous-Paleocent;_! sed!- Post Late Cretaceous-Paleocene Pre ~liocene sedimentary sequence have been deposited controlling with under the influence of epirogenic events Early Eocene sequence rest conformubl over the Late Cretaceous-Paleocene sediments forming the basement rocks of the study area. At the end of Earlg Eocene, the basin has been shallower. After a short erosion phase, marine sediments of Middle Eocene uncorformably overlied the older rock units. At the end of Oligocene the basin has charge in to land becoming shallower again. In Early Miocene, conspressional forces have dominated in the region. In Middle-Late ~liocene, the sequence showing locally marine and terrestrial feactures overlies the older sediments with an angular unconformity. Middle- 1..ate Miocene sedimentation .ai:,.e controlled by growt faults. Late Pliocene sedimentation has been controlled .bY .. contemporaneous faults.
Anahtar Kelimeler
Öz
<;:all§ma alamndaki tortul istif Trakya havza$mdaki tortul istifin yanal e§- degeridi r. Trakya Havzas1 1 ndaki Tersiyer kaya~lanmn depolanmas1 Orta Eosen' de ba§lamasma kar§m, Gelibolu Yanmadas1 1 nda Erken Eosen'de ba§lam1§t1r. lstif, havzada tipik bir transgresif-regresif devirsellik gostermekte, once s1g-su, sonra derin-su daha sonrada tekrar s1g-su tortullan ~okelmi§tir. lnceleme alanmda birbirinden a§mma evreleri ile aynlan be§ tortul istifi bulunur: 1. Tabam gorillmeyeri ve fiste dogru regresif ola'fak son bulan Ge~-Kretase-Paleosen tortul istifi, 2. TraQSgresyonla ba§lay1p regresyonla sonu~lanan Erken Eosen tortul istifi, 3. Transgresyonla ba§lay1p regresyonla sonu~lanan Orta-Ge~ Eosen ve Orta-Ge~ Oligosen tortul istifi, 4. Yer yer denizsel ve karasal Orta-Ge<; Miyosen tortul istifi ve 5. Karasal ve Ge<; Pliyosen tortul istifi. Ge~ Kretase-Paleosen sonras1 Miyosen oncesi tortul istif, al<;alma ve yi.ikselme harcketlerinin kontroli.inde birikmi§tir. Erken Eosen istifi, <;ah§ma alan1- nm temelini olullturan Ge<; Kretase-Paleosen ya§h tortullar iizerinde paralel uyumsuz olarak birikmi§tir. Erken Eosen sonunda havza s1gla§ml§, k1sa bir a§mma evresinden sonra, Orta Eosen'nin denizsel tortullan paralel uyumsuz olarak daha ya§h birimleri ortmi.i§ti.ir. Oligosen sonunda havza tekrar s1gla§arak kara haline doni.i§mi.i§ti.ir. Erken Miyosen'de, bolgede kompresyonel kuwetler etkili olmu§tur. Orta-Ge<; Miyosen 'de yer yer karasal ve denizsel ozellik gosteren istif, daha ya§ft tortullan a<;th uyumsuz olarak ortmi.i§ti.ir. Orta-Ge<; Miyosen tortulla§mas11 tortulla§mayla ya§lt fa.ylar tarafmdan kontr...il edilmi§tir.
Anahtar Kelimeler
Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Konular | Jeoloji (Diğer) |
| Bölüm | Makaleler |
| Yazarlar | |
| Yayımlanma Tarihi | 16 Ağustos 2014 |
| Yayımlandığı Sayı | Yıl 1985 Cilt: 5 Sayı: 1-2 |