Erçek Gölü Havzası çevresinin aktif tektoniği ve havza dolgusunun litostratigrafisi (Van, Türkiye)

Yıl 2018, Cilt: 20 Sayı: 1, 398 - 411, 24.04.2018

Bülent Doğan

https://doi.org/10.25092/baunfbed.418230

Cited By: 1

Öz

Erçek Gölü havzası (ELB), Van Gölü’nün doğusunda yer alan ve yaklaşık
100 km²’lik alana sahip ve doğu kesimi de Özalp’e doğru oluk
morfolojisinden oluşur. Bu alanda temel kayaçları, hem Oligo-Miyosen, hem de
Plio-Kuvaterner yaşlı birimler örter. Erçek gölü havzasının hem güney, hem de
kuzeyinde Oligo-Miyosen yaşlı birimler kıvrımlıdır. Ancak havzanın kuzeyinde
genel olarak D-B doğrultulu kuzeye eğimli ters faylar da gelişmiştir. Güneyde
ise kıvrım eksenleri, D-B’dan kuzeye doğru en fazla 30° lik açı ile sapma
gösterir. Yapısal elemanların Plio-Kuvaterner birimler içinde dağılımı ise
oldukça sınırlı olup, bunlar da Erçek Gölü havzasının kuzeyinde daha belirgindir.
Bu yapısal elamanların içinde az sayıda normal faylar da bulunur. Bu normal
faylar bölgenin K-G sıkışması sonucu oluşmuş olup, aktif tektonik evrimi
süresince gelişmiştir. Erçek Gölü’nün batı kenarını ve göl içi morfolojisini de
deforme eden Kozluca sol yanal doğrultu atımlı fayı da, sıkışan kıtasal
kabuktaki diğer levha-içi yapısal unsurlardan biridir.  

Anahtar Kelimeler

Litostratigrafi, Aktif tektonik, Ters Fay, Doğrultu-Atımlı fay

Active tectonics of Erçek Lake Basin and lithostratigraphy of basin deposits (Van, Turkey)

Öz

The Erçek Lake Basin
(ELB) is located in the eastern part of Van Lake and has an area of approximately
100 km². The eastern section presents gully morphology towards
Özalp. Oligo-Miocene and Plio-Quaternary units cover the basement rocks of the
study area. Oligo-Miocene units are folded on both the southern and northern
parts of ELB. However, in the north of the basin, northward dipping thrust
faults generally developed along E-W. In the south, the fold axes differ by a
maximum of 30 ° from the E-W to the north. The distribution of the structural
elements within the Plio-Quaternary units is rather limited, and these are more
prominent in the north of the Erçek Lake. There are a few normal faults in
these structural elements. The development of these normal faults occurred as a
consequence of the N-S compression in the region and developed in the active
tectonic evolution of the region. The Kozluca left lateral strike-slip fault,
which also deforms the western margin of Lake Erçek and the intra-lake
morphology, is one of the other intra-plate structural elements within the
contracted continental crust.

Anahtar Kelimeler

Lithostratigraphy, Active tectonic, Thrust fault, Strike-slip fault

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