中亚咸海沿岸一个巨大的缓慢滑坡复合体的动力学

IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
GÖKHAN ASLAN, Marcello de MICHELE, Daniel RAUCOULES, François RENARD, John DEHLS, Ivanna PENNA, Reginald HERMANNS, ZİYADİN ÇAKIR
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引用次数: 0

摘要

我们在这里报告了一个缓慢移动的横向扩展型滑坡复合体,由Sentinel-1干涉时间序列分析揭示。位于咸海西岸,长度>150公里,宽度> 3公里,是一个巨大的活动滑坡群,其恒定速度可达60毫米/年。沿着狭窄的阶地条状地带,也观察到系统沉降高达5毫米/年,这似乎是由断界块体的旋转造成的。2014-2022年观测期内,咸海西南湖滑坡变形速度与水位年际变化不相关,表明该滑坡存在长期的强迫作用,更倾向于长期的海平面下降。横向扩展包括在富塑性粘土层和富蒸发岩层上水平分布的充质灰岩层。我们提出了一个滑坡运动的概念模型,该模型似乎受层理、岩性层序、水文地质和低角度断层的姿态控制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamics of a giant slow landslide complex along the coast of the Aral Sea, Central Asia
We report here a slow-moving landslide complex of the lateral spreading type revealed by Sentinel-1 interferometric timeseries analysis. Located along the western coast of the Aral Sea, with a >150-km length and 3-km width, a giant active landslide complex, slides with a constant velocity of up to 60 mm/year. Systematic subsidence up to 5 mm/year is also observed along narrow strips of terraces that appear to result from rotations of fault-bounded blocks. The landslide deformation velocity does not correlate with the annual variations of the water level in the southwestern lake of the Aral Sea during the observation period of 2014-2022, indicating a long-term forcing of this landslide that is rather interpreted to be caused by the long-term sea-level drop. The lateral spreading involves the competent limestone beds lying horizontally on plastic clay- and evaporite-rich layers. We propose a conceptual model for the kinematic of landslides that appear to be controlled by the attitude of bedding, lithological sequence, hydrogeology, and low angle faults.
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来源期刊
Turkish Journal of Earth Sciences
Turkish Journal of Earth Sciences 地学-地球科学综合
CiteScore
2.40
自引率
10.00%
发文量
6
审稿时长
6 months
期刊介绍: The Turkish Journal of Earth Sciences is published electronically 6 times a year by the Scientific and Technological Research Council of Turkey (TÜBİTAK). It is an international English-language journal for the publication of significant original recent research in a wide spectrum of topics in the earth sciences, such as geology, structural geology, tectonics, sedimentology, geochemistry, geochronology, paleontology, igneous and metamorphic petrology, mineralogy, biostratigraphy, geophysics, geomorphology, paleoecology and oceanography, and mineral deposits. Contribution is open to researchers of all nationalities.
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