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首页> 外文期刊>Journal of Asian earth sciences >Paleomagnetic results along the Bitlis-Zagros suture zone in SE Anatolia, Turkey: Implications for the activation of the Dead Sea Fault Zone
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Paleomagnetic results along the Bitlis-Zagros suture zone in SE Anatolia, Turkey: Implications for the activation of the Dead Sea Fault Zone

机译：土耳其SE Anatolia的Bitlis-Zagros缝合带的古磁结果：对死海断层带活化的影响

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The tectonic evolution of SE Anatolia is associated with the collision between the Taurides and the Arabian Platform in the early Cenozoic, after the final closure of the southern branch of the Neotethys ocean during Late Cretaceous to Early Eocene times. The ongoing deformation was characterized by northward movement of Arabia, followed by westward extrusion of Anatolia, having been displaced along the northern and eastern Anatolian transform faults. The neotectonic deformation history between the Anatolian Plate and the Arabian platform since the closure of the southern Neotethyan oceanic basin from Late Cretaceous to present has not been studied in detail paleomagnetically. Therefore we carried out a paleomagnetic study of Mesozoic and Cenozoic rocks at 34 localities along the Bitlis-Zagros suture zone in SE Anatolia located in the boundary region between the Taurides and the Arabian platform and delimited by the Dead Sea Fault.Paleomagnetic results from the area show clockwise rotations of 35.6 degrees +/- 14.1 degrees and 26.7 degrees +/- 8.0 degrees with respect to the African plate from Upper Jurassic - Lower Cretaceous and Upper Cretaceous limestones, respectively. The paleomagnetic results indicate also an earlier deformation/opening due to the Dead Sea Fault Zone (DSFZ). Farther north on the Tauride Block, counterclockwise rotation of -34.5 degrees +/- 12.5 degrees is recorded by Upper Cretaceous limestones. In the SE of the study area on the northern margin of Arabia, however, smaller counterclockwise rotations of -12.3 degrees +/- 8.3 degrees and 2.5 degrees +/- 10.0 degrees in Late Cretaceous and -12.7 degrees +/- 13.6 degrees in middle Eocene rocks show relative tectonic stability. Middle Miocene rocks close to the suture zone show counterclockwise rotation by about -39.4 degrees +/- 10.9 degrees, while farther away from the suture zone counterclockwise rotations of -21.9 degrees +/- 9.9 degrees and 7.5 degrees +/- 5.8 degrees are observed. Paleolatitudinal motion from south to north from the Late Jurassic to the Present is in concordance with the apparent polar wander path of Eurasia and Africa.
机译：在白垩纪晚期至始新世时期，新特提斯海洋的南部分支最终关闭之后，东南安那托利亚的构造演化与新生代早期的陶里德斯与阿拉伯平台之间的碰撞有关。正在进行的变形的特征是阿拉伯向北移动，随后安那托利亚向西挤压，已经沿着安那托利亚北部和东部的转换断层位移了。自南白垩纪晚白垩世以来的新特提斯洋盆关闭以来，安那托利亚板块与阿拉伯平台之间的新构造变形历史尚未进行古地磁研究。因此，我们在安纳托利亚东南部Bitlis-Zagros缝合带沿Taurides和阿拉伯平台之间的边界区域并以死海断层为界，在34个地方进行了中，新生代岩石的古磁性研究。分别显示了相对于上侏罗统-下白垩统和上白垩统灰岩的非洲板块的顺时针旋转35.6度+/- 14.1度和26.7度+/- 8.0度。古磁结果还表明，由于死海断层带（DSFZ），变形/张开也较早。上白垩纪灰岩记录了在Tauride区块更北的位置，逆时针旋转了-34.5度+/- 12.5度。然而，在阿拉伯北部边缘研究区的东南部，逆时针旋转较小，白垩纪晚期为-12.3度+/- 8.3度，中度为2.5度+/- 10.0度，中部为-12.7度+/- 13.6度始新世岩石表现出相对的构造稳定性。靠近缝合带的中新世中层岩石显示逆时针旋转约-39.4度+/- 10.9度，而远离缝合带的逆时针旋转则为-21.9度+/- 9.9度和7.5度+/- 5.8度。从侏罗纪晚期到现在，从南到北的古纬向运动与欧亚大陆和非洲的明显极地漫游路径相一致。

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