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首页> 外文期刊>Geodinamica Acta >Spatial analysis of morphometric indices: the case of Bolu pull-apart basin, western section of North Anatolian Fault System, Turkey
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Spatial analysis of morphometric indices: the case of Bolu pull-apart basin, western section of North Anatolian Fault System, Turkey

机译：形态计量指标的空间分析：以土耳其北部安那托利亚断裂带西段的博鲁拉拉盆地为例

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摘要

Advances in quality, acquisition and processing of high-resolution digital topography over the past decade have enabled geomorphologists to interpret topography in terms of tectonic processes in a quantitative and more objective way. This study defines the tectonic impact of the North Anatolian fault system (NAFS) on the evaluation and activity of the Bolu pull-apart basin using morphometric indices based on topographic maps. In this study, three different indices including valley floor width to height ratio (Vf), asymmetry factor (Af), and Stream Length Gradient Index (SL) are applied to the tectonic basin area. To detect the deviation from spatial randomness of applied indices, the weighted correlation coefficient Moran's I is used, and results are interpreted at 99% confidence interval. According to the results, the tectonic impact of NAFS on the northern and western sides of the basin distinctly differs from one another. Clustered distribution of Vf and Af values on the southern side of the basin margin reveals that this side of the basin margin is tectonically more deformed compared with the northern side. The applied methodology reveals that the spatial analysis of the morphometric indices proved to be the effective tool in analyzing tectonic influence of the fault system on the opposite side of the basin margins.
机译：在过去的十年中，高分辨率数字地形的质量，获取和处理方面的进步使地貌学家能够以定量和更客观的方式根据构造过程解释地形。这项研究使用基于地形图的形态计量指标，定义了北安纳托利亚断裂系统（NAFS）对博鲁拉脱盆地评价和活动的构造影响。在这项研究中，三个不同的指标，包括谷底宽高比（Vf），不对称因子（Af）和流长梯度指数（SL）被应用于构造盆地区域。为了检测与所应用索引的空间随机性的偏差，使用加权相关系数Moran's I，并以99％置信区间解释结果。根据结果​​，NAFS对盆地北侧和西侧的构造影响明显不同。盆地边缘南侧的Vf和Af值的聚类分布表明，与北部相比，盆地边缘的这一侧在构造上变形更大。应用的方法学表明，形态计量指标的空间分析被证明是分析盆地边缘对侧断层系统的构造影响的有效工具。

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