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Morphotectonic configuration of the Podtatranská Kotlina Basin and its relationship to the origin of the Western Carpathians
Geomorphology ( IF 3.1 ) Pub Date : 2021-09-21 , DOI: 10.1016/j.geomorph.2021.107963
Ladislav Vitovič 1, 2 , Jozef Minár 1 , Tomáš Pánek 3
Affiliation  

In tectonically active regions, many aspects of the topography can provide clues to morphotectonic development. Morphological lineaments have varying degrees of reliability as indicators of neotectonic movement. Here, eleven lines of evidence are assessed and combined for the Podtatranská kotlina Basin (PtK) between the Tatra and Low Tatra (Nízke Tatry) Mountains, the highest topography of the Western Carpathians. This permits identification of the configuration of structural-neotectonic blocks and documentation of their behaviour. Specifically we 1) evaluate the reliability of fault mapping results, 2) assess relative uplift and subsidence accommodated by the faults, 3) evaluate the intensity of fault movement and 4) explore the role of fault movement in the tilting of blocks. We define 358 structural-neotectonic blocks in the PtK region, providing an exceptionally detailed morphotectonic analysis. Distinction of two stages of neotectonic uplift provides explanation of the regional discrepancy between intensive neotectonic activity and limited recent seismicity with Mw < 5. The first stage, in the Pliocene-Early Pleistocene, was characterized by isostatic uplift linked to delamination and/or convective removal of an over-thickened lithosphere. The second stage during the Late Quaternary involved more complex uplift, including the probable influence of episodic mantle flow induced by the load of the Scandinavian Ice Sheet on northern Europe. This resulted in a change in the extension and configuration of structural-neotectonic blocks, the movements of the Tatra block now measured by GNSS, and the interaction of neotectonic activity with effects of glacial – interglacial transitions.



中文翻译:

Podtatranská Kotlina 盆地的地貌构造构造及其与西喀尔巴阡山脉起源的关系

在构造活跃的地区,地形的许多方面都可以提供形态构造发展的线索。形态线条作为新构造运动的指标具有不同程度的可靠性。在这里,对位于西喀尔巴阡山脉最高地势的 Tatra 和 Low Tatra (Nízke Tatry) 山脉之间的 Podtatranská kotlina 盆地 (PtK) 的 11 条证据进行了评估和组合。这允许识别结构新构造块的配置并记录它们的行为。具体而言,我们 1) 评估断层映射结果的可靠性,2) 评估断层容纳的相对隆起和沉降,3) 评估断层运动的强度,以及 4) 探讨断层运动在块体倾斜中的作用。我们在 PtK 区域定义了 358 个结构新构造块,提供异常详细的形态构造分析。新构造隆升的两个阶段的区别解释了强烈的新构造活动与近期有限的地震活动与 M 之间的区域差异w  < 5. 上新世-早更新世的第一阶段的特征是与过度增厚的岩石圈的分层和/或对流去除相关的等静压抬升。晚第四纪的第二阶段涉及更复杂的隆升,包括斯堪的纳维亚冰盖对北欧的负荷引起的偶发地幔流的可能影响。这导致结构-新构造块体的延伸和配置发生了变化,塔特拉块体的运动现在由 GNSS 测量,以及新构造活动与冰期-间冰期过渡影响的相互作用。

更新日期:2021-09-21
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