Investigating the Geomorphic Evidence and Movement Potential of Active Faults in Golpayegan Area, Iran

IF 0.7 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Doklady Earth Sciences Pub Date : 2024-05-13 DOI:10.1134/s1028334x23603590

Nafiseh Hajnorouzi, Mohsen Pourkermani, Mehran Arian, Zahra Maleki, Ali Solgi

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Abstract

Along the western part of Golpayegan city, in an area parallel to the main axis of Zagros, the calculation of morphometric indices in the Golpayegan basin means that the tectonic activity is significant from a morphometric point of view. Tectonic activity was not the same throughout the region and although no major earthquake was reported in Golpayegan region, morphometric evidence shows the general tectonic activity of the region. Geomorphic evaluation of the Golpayegan area shows that some of the northwest-southeast trending faults and the tips of some faults in the west Golpayegan city should be considered as potential earthquake areas. The Golpayegan area is located in the Sanandaj-Sirjan structural zone, one of Iran’s most active seismic zones. The present study aimed to evaluate the effect of faults on landforms through morphotectonic indices and the causes of knick points and knick zones in the Bedrock Rivers in part of the Sanandaj-Sirjan tectonic zone. To this end, six morphometric indices such as longitudinal gradient (\(SL\)), hierarchical anomaly (\(\Delta a\)), the bifurcation index (\(R\)), hypsometric integral and hypsometric curve (Hi-Hc), relative relief (\(Bh\)), and basin shape (\(Bs\)) were calculated and analyzed in 22 sub-basins of the area. Based on the findings, the existence of slope-break knick points at the mountain piedmont and at the outlet of large rivers through active faults demonstrated these landforms were created by movements along the main faults such as Bid Arab and Khansar faults which have the highest mobility potential.

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调查伊朗戈尔帕耶甘地区活动断层的地貌证据和运动潜力

摘要戈尔帕耶甘盆地位于戈尔帕耶甘市西部，该地区与扎格罗斯山脉主轴平行，对该地区形态指数的计算表明，从形态角度看，该地区的构造活动十分活跃。整个地区的构造活动不尽相同，虽然戈尔帕耶甘地区没有发生大地震，但形态测量证据表明该地区的构造活动普遍存在。戈尔帕耶甘地区的地貌评估表明，戈尔帕耶甘市西部的一些西北-东南走向断层和一些断层的顶端应被视为潜在的地震区。戈尔帕耶甘地区位于伊朗地震最活跃的萨南达季-锡尔詹构造带。本研究旨在通过形态构造指数评估断层对地貌的影响，以及萨南达季-锡尔詹构造带部分地区基岩河流中的节理点和节理带的成因。为此，计算并分析了该地区22个子流域的六个形态指数，如纵向坡度（SL）、层次异常（Delta a）、分叉指数（R）、湿度积分和湿度曲线（Hi-Hc）、相对地形（Bh）和盆地形状（Bs）。根据研究结果，在山腹和大河出水口存在通过活动断层的断坡节理点，这表明这些地貌是由主要断层（如流动潜力最大的 Bid Arab 断层和 Khansar 断层）的运动造成的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Doklady Earth Sciences 地学-地球科学综合

CiteScore

1.40

自引率

22.20%

发文量

138

审稿时长

3-6 weeks

期刊介绍： Doklady Earth Sciences is a journal that publishes new research in Earth science of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.