Morphotectonic analysis of the East Anatolian Fault, Turkey

Abdelrahman KHALIFA; Ziyadin ÇAKIR; Lewis OWEN; Şinasi KAYA

Makale detayları

Morphotectonic analysis of the East Anatolian Fault, Turkey

Yazarlar:

Abdelrahman KHALIFA | Ziyadin ÇAKIR | Lewis OWEN | Şinasi KAYA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2018 Vol.27 Issue 2, pp.110-126

Belge Tipi:

Makale

Yayın Tarihi:

3/2018

Belge Dili:

İngilizce

Document ID (Org No.):

2000731174

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

The East Anatolian Fault (EAF) is a morphologically distinct and 
seismically active left-lateral strike-slip fault that extends for ~400 
km and forms the Arabian/Anatolian plate boundary in southeastern 
Turkey. The EAF together with its conjugate fault, the North Anatolian 
Fault, help accommodate the westward escape of the Anatolian plate from 
the Arabian/Eurasian collision zone. Morphotectonic features along the 
EAF provide insights into the nature of landscape development and aid in
 understanding variations in tectonic activity and fault evolution. 
Several geomorphic indices, namely stream length-gradient index, 
mountain-front sinuosity, valley width to valley height ratio, basin 
asymmetry factor, and drainage density, and hypsometric analysis were 
examined using digital elevation models. The EAF can be divided into 
five segments based on its tectonic geomorphology. The stream 
length-gradient index values are between 50 and 350 along the five 
segments. Mountain-front sinuosity varies from 1.01 to 1.46 on the five 
segments. The mean ratio of valley floor width to valley height along 
the studied segments ranges from 0.11 to 1.32, which is well correlated 
with the mountain-front sinuosity values. Basin asymmetry factors for 18
 catchments range from 1.88 to 26.25 along the study fault zone. 
Drainage density values for the studied catchments range from 3.5 to 
5.6. Finally, the hypsometric analysis index of the 18 catchments 
indicates high, intermediate, and low relative tectonic activity. The 
results show that all geomorphic indices are remarkably uniform along 
the entire length of the fault, thus indicating that fault development 
was essentially coeval along its length, which supports the view that 
the present-day Arabian/Anatolian plate boundary (delimited by the EAF) 
jumped eastwards from the Malatya-Ovacık Fault at ~3 Ma. This is in good
 agreement with the nearly uniform geological offsets and the 
GPS-determined present-day slip rate of ~10 mm/year along the entire 
fault.

Makale detayları

Morphotectonic analysis of the East Anatolian Fault, Turkey

Yazarlar: Abdelrahman KHALIFA | Ziyadin ÇAKIR | Lewis OWEN | Şinasi KAYA

Yayıncı: TUBITAK

Dergi: Turkish Journal of Earth Sciences 2018 Vol.27 Issue 2, pp.110-126

Belge Tipi: Makale

Yayın Tarihi: 3/2018

Belge Dili: İngilizce

Document ID (Org No.): 2000731174

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

Abdelrahman KHALIFA | Ziyadin ÇAKIR | Lewis OWEN | Şinasi KAYA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2018 Vol.27 Issue 2, pp.110-126

Belge Tipi:

Makale

Yayın Tarihi:

3/2018

Belge Dili:

İngilizce

Document ID (Org No.):

2000731174

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985