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Paleostress analysis of the Yeşilyurt-Elazığ Fault Zone and its importance for the tectonic evolution, East Turkey
Journal of Structural Geology ( IF 3.1 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.jsg.2020.104093
Mehmet Köküm , Murat İnceöz

Abstract The Yesilyurt-Elazig Fault Zone (YEFZ) located in Eastern Anatolia is a morphologically distinct NE-SW trending left-lateral strike-slip fault, about 150 km long. In this study, inversion of fault slip data collected from the YEFZ and tectonic locations of the stratigraphic units are used in order to reveal the tectonic evolution and chronology of faulting from early Paleocene to today. Based on the inversion of about 250 fault slip data, four successive deformation phases are defined in the study area since early Paleocene. The first deformation phase is characterized by N–S compression during the early Paleocene. The second deformation phase is NW-SE extension related to slab steepening and breakoff in late Paleocene-early Miocene. The third deformation phase is a NNE-SSW compressional one in the middle Miocene-early Pliocene. A strike-slip phase with NNE-SSW compression is the fourth and youngest deformation phase in the study area. Dip-slip striations are overprinted by strike-slip striations; we hence interpret that these faults were reactivated under the later stress field. Our results are consistent with other published regional studies.

中文翻译:

Yeşilyurt-Elazığ 断裂带的古应力分析及其对构造演化的重要性,东土耳其

摘要 位于安纳托利亚东部的 Yesilyurt-Elazig 断层带(YEFZ)是一条形态明显的 NE-SW 向左旋走滑断层,长约 150 公里。在这项研究中,从 YEFZ 和地层单元的构造位置收集的断层滑动数据的反演被用来揭示从早古新世到今天的断层的构造演化和年代学。根据对大约 250 个断层滑动数据的反演,在早古新世以来研究区定义了四个连续的变形阶段。第一变形阶段的特征是古新世早期的 N-S 压缩。第二个变形阶段是与晚古新世-早中新世板块陡峭和断裂有关的 NW-SE 伸展。第三变形相是中中新世-早上新世的 NNE-SSW 挤压相。具有 NNE-SSW 压缩的走滑相是研究区第四个也是最年轻的变形相。浸滑条纹由走滑条纹叠印;我们因此解释这些断层在后来的应力场下被重新激活。我们的结果与其他已发表的区域研究一致。
更新日期:2020-09-01
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