|
Toker Mustafa, Eurasia Institute of Earth Sciences (Turkey)
Vedat Ediger, TUBITAK, Marmara Research Center, Institute of Earth and Marine Sciences (Turkey)
Graham Evans, Imperial College (United Kingdom)
|
|
The incompatibility has led to the formation of complex intracontinental basins in E-Turkey, the one is the NE-Mediterranean; the N-S-Cilicia and NNE-Adana basins. The NNE-Adana basin is major extensional delta basin lying at plate triple junction, becomes a part of the internal Anatolian regime and results from compatibility problems. The Adana Basin, a lithospheric extension zone at the edge of the Anatolian Plateau, might be a major pull-apart in a complex sinistral transform zone, but its position at the Africa/Syria/Anatolia triple junction offers a better and more complex kinematic explanation in terms of salt tectonics.
In this study, the gravity instability of layered systems in the field of large scale asymmetric delta sedimentation and of tectonic complexity and related halokinetic instabilities are analyzed. The salt-related structures; salt withdrawal basins, salt-cored folds, distortion of diapirism and other salt instability products are reconsidered by the effects of tectonic unstability due to halokinesis and gravity potential-enhanced deformation. Our results demonstrated the existence of salt-related basin unstability of the NE-Mediterranean. We interpreted tectonic unstability according to classification scheme of salt tectonics based on the type of regional lateral strain, lateral regional extension in vertical plane and on increase or decrease of gravity potential during deformation. Sinistral transtension or unstable oblique extensional tectonism of the Cilicia-Adana Basin by lateral forces, which are encouraged by gravity. Strain caused decreased gravity potential, and thus gravity-enhanced deformation.
Salt tectonism and halokinesis in the NNE-Adana delta platform system which gives NNW delta extension in the Adana region close to the Maras triple junction and supports lithospheric extension argument and flexural loading of Adana basin. Faulting and deformation map confirms that the Cilicia-Adana basin may be,thus,simply a compatibility gap resulting from the evolution of an FFF plate triple junction and thus subjected to strong halokinetic regime. Central abyssal plain in the NNE-SSW trends is tectonically driven by sinistral transtension-induced deep, rapidly subsiding, huge and arcuate graben system, divided into two different halokinetic and subsidence systems; the NNE-Adana segment-A and the N-S-Cilicia segment-C. It is concluded that the neotectonic evolution of the basin, its structural and depositional development are originated by a combination of the superimposed, contrasting tectonic and asymmetric depositional elements. Tectonic incompatibility problems of plate junctions, differential gravity potentials and halotectonic and depositional instability of layered systems in the NE-Mediterranean offered more complex kinematic explanation of this salt tectonic basin system.
|
