Stratigraphy and Structural Geology of the Eastern Part of the Büyük Menderes Graben, Western Turkey Based on 2-D Seismic Reflection Profiles Stratigraphy and Structural Geology of the Eastern Part of the Büyük Menderes Graben, Western Turkey Based on 2-D Seismic Reflection Profiles

Abstract

The Alasehir and Büyük Menderes Grabens are two main east-west trending extensional basins located in the central part of Western Anatolia extended terrane, Turkey. These basins are formed during the Cenozoic extension in the region. Although structural development of the Alasehir Graben was studied in detail in recent years, the Büyük Menderes Graben (BMG) has remained relatively unstudied. We have constructed structural cross-sections in the BMG based on our interpretation of the 2D seismic reflection profiles of the Turkish Petroleum Corporation (TPAO) and a wildcat well, Nazilli-1, drilled by the same company. We have delineated stratigraphy of the Miocene to recent sedimentary section and the structural geometry of the extensional features in the eastern BMG. We are also comparing them to published stratigraphic sections and structural cross-sections in the Alasehir graben (AG). Our interpretation of the available seismic and well data together with the depth-conversion conducted by us suggests that the south dipping main boundary fault on the northern side of the BMG has been active during the Miocene sedimentation in the basin. This is evidenced by the wedge-shaped growth strata adjacent to the main boundary fault. Syn-sedimentary extension in the graben has also formed the rollover structure and associate extensional folds and faults. However, these structures are not as well developed as the ones in the AG. This is demonstrated by the very broad nature of the rollover folds and high angle non-rotational nature of the extensional faults within the basinal sediments in the BMG. This suggests that the intensity of the extensional features in the BMG is lesser than the AG. Therefore, although the AG and BMG may have started to form simultaneously, they may have experienced different rates and amounts of extension and they do not contain symmetrical structural features.

Full text

Stratigraphy and Structural Geology of the Eastern Part of the Büyük Menderes Graben, Western Turkey Based on 2-D Seismic Reflection Profiles
http://www.searchanddiscovery.com/abstracts/html/2015/90216ace/abstracts/2104637.html[5/21/2015 12:32:35 PM]
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Stratigraphy and Structural Geology of the Eastern
Part of the Büyük Menderes Graben, Western Turkey
Based on 2-D Seismic Reflection Profiles
Seren Sert1 and Ibrahim Cemen1
1Geological Sciences, University of Alabama, Tuscaloosa, Alabama, United States
June 1, 2015 Monday 4:25 P.M. AAPG Annual Convention and Exhibition, Denver, CO.
Abstract
Abstract
The Alasehir and Büyük Menderes Grabens are two main east-west trending extensional basins located in
the central part of Western Anatolia extended terrane, Turkey. These basins are formed during the Cenozoic
extension in the region. Although structural development of the Alasehir Graben was studied in detail in recent
years, the Büyük Menderes Graben (BMG) has remained relatively unstudied. We have constructed structural
cross-sections in the BMG based on our interpretation of the 2D seismic reflection profiles of the Turkish
Petroleum Corporation (TPAO) and a wildcat well, Nazilli-1, drilled by the same company. We have
delineated stratigraphy of the Miocene to recent sedimentary section and the structural geometry of the
extensional features in the eastern BMG. We are also comparing them to published stratigraphic sections and
structural cross-sections in the Alasehir graben (AG). Our interpretation of the available seismic and well data
together with the depth-conversion conducted by us suggests that the south dipping main boundary fault on
the northern side of the BMG has been active during the Miocene sedimentation in the basin. This is
evidenced by the wedge-shaped growth strata adjacent to the main boundary fault. Syn-sedimentary
extension in the graben has also formed the rollover structure and associate extensional folds and faults.
However, these structures are not as well developed as the ones in the AG. This is demonstrated by the very
broad nature of the rollover folds and high angle non-rotational nature of the extensional faults within the
basinal sediments in the BMG. This suggests that the intensity of the extensional features in the BMG is
lesser than the AG. Therefore, although the AG and BMG may have started to form simultaneously, they may
have experienced different rates and amounts of extension and they do not contain symmetrical structural
features.
AAPG Datapages/Search and Discovery Article #90216 ©2015 AAPG Annual Convention and Exhibition, Denver, CO., May 31 - June 3, 2015
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