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Structural Evolution of the Tuzgölü Basin in Central Anatolia, Turkey
The Journal of Geology ( IF 1.8 ) Pub Date : 1999-11-01 , DOI: 10.1086/314379 İbrahim Çemen , M. Cemal Göncüoglu , Kadir Dirik
The Journal of Geology ( IF 1.8 ) Pub Date : 1999-11-01 , DOI: 10.1086/314379 İbrahim Çemen , M. Cemal Göncüoglu , Kadir Dirik
The Central Anatolian segment of the Alpine‐Himalayan orogen contains “interior” basins, the largest of which is the Tuzgölü (Salt Lake) basin (>20,000 km2). It is bounded on the east by the Tuzgölü (Salt Lake) fault zone and on the west by the Yeniceoba and Cihanbeyli fault zones. Structural, stratigraphic, and sedimentologic evidence suggests that the Tuzgölü basin started as a fault‐controlled basin during late Maastrichtian tectonism when the present‐day northwest‐trending faults that bound the basin were initiated. These faults may have been formed as normal faults suggesting extension or strike‐slip faults with a normal component of movement indicating a large transtension at the time of their initiation. The late Maastrichtian faults were reactivated as strike‐slip faults in response to late Eocene compression in the region that produced the Central Anatolian thrust belt to the north and the late Eocene south‐dipping thrust faults of the Ulukişla basin to the south. This reactivation is suggested by structurally repeated and missing Paleocene‐Eocene deposits in some of the basin's wildcat wells. The late Eocene regression in the Tuzgölü basin was caused by the combined effects of Eocene shortening and a large environmental change. Late Eocene evaporites suggest that the basin was dry before the start of the Neotectonic period, while during the Neotectonic itself the Tuzgölü fault zone was reactivated again, predominantly as a normal fault with a right‐lateral strike‐slip component. This is evidenced by (1) a major unconformity between the post‐Eocene Koçhisar Formation of the Tuzgölü basin and the underlying Eocene rock units; (2) a well‐developed rollover anticline observed on seismic reflection profiles; and (3) a right‐step along the Tuzgölü fault zone seen in the field.
中文翻译:
土耳其安纳托利亚中部图兹格吕盆地的构造演化
高山-喜马拉雅造山带的安纳托利亚中部段包含“内部”盆地,其中最大的是图兹格吕(盐湖)盆地(>20,000 平方公里)。它东接图兹格吕(盐湖)断层带,西接叶尼切奥巴和奇汗贝利断层带。构造、地层和沉积学证据表明,图兹格吕盆地在马斯特里赫特晚期构造运动期间作为断层控制的盆地开始,当时连接盆地的现今西北向断层开始形成。这些断层可能是作为正常断层形成的,表明是伸展断层或走滑断层,具有正常的运动分量,表明在它们开始时有大的横张。马斯特里赫特晚期断层被重新激活为走滑断层,以响应该地区始新世晚期的挤压,该地区产生了北部的安纳托利亚中部逆冲带和南部的 Ulukişla 盆地的晚始新世南倾逆冲断层。盆地的一些野井井中存在结构重复和缺失的古新世-始新世沉积物,表明这种重新激活。图兹格吕盆地的晚始新世海退是始新世缩短和大环境变化的综合影响造成的。晚始新世蒸发岩表明盆地在新构造开始之前是干燥的,而在新构造本身期间,Tuzgölü 断裂带再次重新活动,主要是具有右侧走滑成分的正断层。这由 (1) Tuzgölü 盆地的后始新世 Koçhisar 组与下伏始新世岩石单元之间的主要不整合来证明;(2) 在地震反射剖面上观察到发育良好的翻转背斜;(3) 在野外看到的沿着图兹格吕断裂带的右台阶。
更新日期:1999-11-01
中文翻译:
土耳其安纳托利亚中部图兹格吕盆地的构造演化
高山-喜马拉雅造山带的安纳托利亚中部段包含“内部”盆地,其中最大的是图兹格吕(盐湖)盆地(>20,000 平方公里)。它东接图兹格吕(盐湖)断层带,西接叶尼切奥巴和奇汗贝利断层带。构造、地层和沉积学证据表明,图兹格吕盆地在马斯特里赫特晚期构造运动期间作为断层控制的盆地开始,当时连接盆地的现今西北向断层开始形成。这些断层可能是作为正常断层形成的,表明是伸展断层或走滑断层,具有正常的运动分量,表明在它们开始时有大的横张。马斯特里赫特晚期断层被重新激活为走滑断层,以响应该地区始新世晚期的挤压,该地区产生了北部的安纳托利亚中部逆冲带和南部的 Ulukişla 盆地的晚始新世南倾逆冲断层。盆地的一些野井井中存在结构重复和缺失的古新世-始新世沉积物,表明这种重新激活。图兹格吕盆地的晚始新世海退是始新世缩短和大环境变化的综合影响造成的。晚始新世蒸发岩表明盆地在新构造开始之前是干燥的,而在新构造本身期间,Tuzgölü 断裂带再次重新活动,主要是具有右侧走滑成分的正断层。这由 (1) Tuzgölü 盆地的后始新世 Koçhisar 组与下伏始新世岩石单元之间的主要不整合来证明;(2) 在地震反射剖面上观察到发育良好的翻转背斜;(3) 在野外看到的沿着图兹格吕断裂带的右台阶。