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Geomorphic evidence for active tectonic deformation in the coastal part of Eastern Black Sea, Eastern Pontides, Turkey
Geodinamica Acta ( IF 1.5 ) Pub Date : 2018-01-01 , DOI: 10.1080/09853111.2018.1494776
Mustafa Softa 1, 2 , Tahir Emre 1 , Hasan Sözbilir 1 , Joel Q. G. Spencer 3 , Mehmet Turan 4
Affiliation  

ABSTRACT The Eastern Pontides (EP), which is the under transpressional deformation zone, is an active mountain belt that has been rising rapidly since the Cenozoic era because of the Arabian-Eurasian convergence. Morphometric studies have been performed to investigate the tectonic activity of this region and better understand the characteristics of the faults geomorphologically; the faults control the mountain fronts in the drainage basin of the EP. The results show the Hypsometric Curve (HC)-Hypsometric Integral (0.37-HI-0.67), Basin-Shaped Analysis (1.2-Bs-7), Valley-Floor-Width to Height-Ratio (0.4-Vf-1.2) and Asymmetry Factor (35-AF-81) applied to 46 drainage basins together with 9 tectonically controlled geomorphic indices (1.2-Smf-1.5) and a Stream Length Gradient (30-SL-120) indicate that the EP is tectonically active, and when the areas are evaluated according to Smf and Vf analyses, the tectonic level is relatively high. According to our conceptual model for the uplifting of the EP, with respect to field studies and morphometric analysis, (i) the EP is the active deformation zone and has a “push-up” geometry in conjunction with the North Anatolian Fault; (ii) the EP is progressively uplifting at a rate of more than 0.5 mm/yr in along with the thrust faults of the Black Sea Fault (BSF) and Borjomi-Kazbegi Fault (BKF).

中文翻译:

土耳其东部庞蒂德斯黑海东部沿海地区活动构造变形的地貌证据

摘要 东海盆底(EP)是受压变形带,是新生代以来由于阿拉伯—欧亚辐合而迅速上升的活动山带。已进行形态测量研究以调查该地区的构造活动并更好地了解断层地貌特征;断层控制了 EP 流域盆地的山锋。结果显示了测压曲线 (HC)-测压积分 (0.37-HI-0.67)、盆地形状分析 (1.2-Bs-7)、谷底宽高比 (0.4-Vf-1.2) 和不对称性应用于 46 个流域盆地的因子 (35-AF-81) 连同 9 个受构造控制的地貌指数 (1.2-Smf-1.5) 和河流长度梯度 (30-SL-120) 表明 EP 具有构造活动性,根据 Smf 和 Vf 分析评估区域时,构造水平较高。根据我们关于 EP 抬升的概念模型,在现场研究和形态测量分析方面,(i) EP 是活动变形带,并且具有与北安纳托利亚断层相结合的“俯卧撑”几何形状;(ii) EP 与黑海断层 (BSF) 和 Borjomi-Kazbegi 断层 (BKF) 的逆冲断层一起以超过 0.5 毫米/年的速度逐渐抬升。
更新日期:2018-01-01
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