Palaeoseismic structures in Quaternary sediments, related to an assumed fault zone north of the Permian Peissen-Gnutz salt structure (NW Germany) – Neotectonic activity and earthquakes from the Saalian to the Holocene

Grube, Alf

doi:10.1016/j.geomorph.2018.12.004

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…Deciphering the trigger mechanism and the driving force of this type of deformation in different sedimentary environments is an important issue in Quaternary geology, sedimentology and tectonics, especially in formerly‐glaciated intraplate stable continental core regions of the Northern Hemisphere (e.g. Van Vliet‐Lanoë et al ., 2004; Brandes & Winsemann, 2013; van Loon et al ., 2016; Brandes et al ., 2018; Brooks, 2018; Pisarska‐Jamroży et al ., 2018a, 2019a; Bertran et al ., 2019; Grube, 2019; Brooks & Adams, 2020; van Loon et al ., 2020, and references therein). Recently, research focused on distinguishing between seismic and non‐seismic triggers based on SSDS and their position within the sedimentary record (e.g.…”

Section: Introductionmentioning

confidence: 99%

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

et al. 2021

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Liquefaction can cause deformation of unconsolidated sediment, but specific processes involved and the trigger mechanisms often remain obscured. This study describes multiple deformed sediment layers in a succession of lacustrine sand, silt and clay deposited during the Marine Isotope Stage 5d in north-western Lithuania. The deformation structures (load casts, pseudonodules, ball-and-pillow structures, broken-up laminae and injections) are embedded in ten separate layers of fine-grained, laterally continuous sediments. Detailed mesoscale sedimentological analyses suggest that each deformation event consisted of numerous successive stages of sediment advection facilitated by liquefaction. Low-permeability fine-grained laminae contributed to localized pore-water pressure build-up and lowering of sediment strength. Erosional top surfaces that truncate layers with soft-sediment deformation structures suggest that at least seven deformation events were separated by successive periods of initial erosion and then uninterrupted deposition in the lake. The most likely trigger of the deformation was recurrent palaeoseismic activity possibly linked to a late glacial isostatic adjustment following the Scandinavian Ice Sheet melting after the Saalian glaciation. This study emphasizes the potential role of seismic processes in shaping the sedimentary record of the intraplate region of north-eastern Europe and contributes to constraining the depth of liquefaction, regardless of the actual trigger mechanism.

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Section: Introductionmentioning

confidence: 99%

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

et al. 2021

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“…70,71 Many ice-wedge pseudomorphs have been described in the loess, 44,59,72 whereas sand wedges or composite-wedge pseudomorphs dominate in the Sand Belt at the periphery of the FIS. 52,54,56,57 Further south, the lack of cropmarks in loess, particularly in France, indicates that the growth of large wedges did not affect the later phases of loess deposition. This is in agreement with stratigraphic observations and numerical ages obtained on ice-wedge pseudomorphs, which show that the majority developed between 31 and 24 ka, during the period referred to as Last Permafrost Maximum (LPM, 73,74 ).…”

Section: Discussionmentioning

confidence: 99%

Distribution and characteristics of Pleistocene ground thermal contraction polygons in Europe from satellite images

Bertrán

2022

Permafrost & Periglacial

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The study of Pleistocene polygons in Europe carried out using the collection of satellite images available in Google Earth™ provides new data on the distribution of ground cracking by thermal contraction during glacial periods and sheds light on some factors controlling their formation. The distribution map shows that thermal contraction cracking affected terrain between latitude 43.5 N and the southern limit of the Fennoscandian Ice Sheet at 15 ka, with a concentration of polygons north of latitude 51 N. A clear asymmetry exists in relation to longitude, with a greater southward extension of polygons in France (43.5 N) than in central Europe (47 N). Analysis of the characteristics of polygons at the European scale reveals an association with lithology, latitude, and the age of the sediments in which they formed. The morphological evolution over time reconstructed from observations of polygons of contrasting ages indicates that a stable mature phase, characterized by small (mean size 15 m), regular polygons with numerous Y-junctions, is reached after ca. 4 ka of thermal contraction cracking activity.

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“…Examples include the 80 km long Stuoragurra fault in northern Norway [16] and the 150 km long Pärvie fault in northern Sweden [17]. There is also evidence of such faults in Denmark [18], Germany, Poland, and the United Kingdom ( [19][20][21][22][23]). Thus, such faults are found in the center of former ice sheets, as well as at their margins and beyond [24,25].…”

Section: Of 15mentioning

confidence: 99%

Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea

2019

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Many of the Earth’s sedimentary basins are affected by glaciations. Repeated glaciations over millions of years may have had a significant effect on the physical conditions in sedimentary basins and on basin structuring. This paper presents some of the major effects that ice sheets might have on sedimentary basins, and includes examples of quantifications of their significance. Among the most important effects are movements of the solid Earth caused by glacial loading and unloading, and the related flexural stresses. The driving factor of these movements is isostasy. Most of the production licenses on the Norwegian Continental Shelf are located inside the margin of the former Last Glacial Maximum (LGM) ice sheet. Isostatic modeling shows that sedimentary basins near the former ice margin can be tilted as much as 3 m/km which might significantly alter pathways of hydrocarbon migration. In an example from the SW Barents Sea we show that flexural stresses related to the isostatic uplift after LGM deglaciation can produce stress changes large enough to result in increased fracture-related permeability in the sedimentary basin, and lead to potential spillage of hydrocarbons out of potential reservoirs. The results demonstrate that future basin modeling should consider including the loading effect of glaciations when dealing with petroleum potential in former glaciated areas.

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Palaeoseismic structures in Quaternary sediments, related to an assumed fault zone north of the Permian Peissen-Gnutz salt structure (NW Germany) – Neotectonic activity and earthquakes from the Saalian to the Holocene

Cited by 14 publications

References 34 publications

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

Distribution and characteristics of Pleistocene ground thermal contraction polygons in Europe from satellite images

Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea

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