Postglacial Fault Drilling in Northern Europe: Workshop in Skokloster, Sweden

Kukkonen, Ilmo; Ask, Maria; Olesen, Odleiv

doi:10.2204/iodp.sd.11.08.2011

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Further clarification is needed in the physics of post-glacial earthquakes. Here, in addition to modeling, proposed scientific drilling gives a unique possibility to explore the characteristics of post-glacial faults in northern Fennoscandia, including their structure and rock properties, present and past seismic activity and state of stress, as well as hydrogeology and associated deep biosphere (Kukkonen et al, , 2011.…”

Section: Discussionmentioning

confidence: 99%

Glacial isostatic adjustment in Fennoscandia—A review of data and modeling

Steffen

2011

Journal of Geodynamics

191

145

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Section: Discussionmentioning

confidence: 99%

Glacial isostatic adjustment in Fennoscandia—A review of data and modeling

Steffen

2011

Journal of Geodynamics

191

145

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“…We suggest two avenues for mitigating the general lack of early Holocene geological data, in particular reliable fault dates. First, continue targeted drilling into some of the major GLFP faults to improve fault parameters and dates (Kukkonen et al, 2011;Ask et al, in press), and second, to expand high-resolution profiling of faults in lakes and inland seas where young sediments might be cored, thus providing reliable deformation ages (e.g., Jakobsson et al, 2014;Gràcia et al, 2017;Olsen & Høgaas, 2020).…”

Section: Discussionmentioning

confidence: 99%

Potential secondary events caused by early Holocene paleoearthquakes in Fennoscandia – a climate-related review

Eldholm¹,

Bungum²

2021

NJG

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During the last deglaciation of Fennoscandia, large earthquakes may have induced secondary effects on the high-latitude coastal regions and continental margins primarily from surface rock avalanches, large and small submarine slides, local and regional flooding, and tsunamis. In this overview, we show that the climate-earthquake-slide-tsunami causal sequence is particularly important, as is structural inheritance and rejuvenation. However, there are potential earthquake-generating early Holocene faults also beyond the previously defined Lapland Fault Province. Thus, we introduce the term the Greater Lapland Fault Province. Earthquakes in the expanded fault province are candidates for triggering the 8.1 ka Storegga Megaslide and/or its predecessors and coeval tsunamis. The events might have released other submarine slides, gas hydrate expulsion leaving large pockmark fields, rock avalanches and submarine mass wasting in fjord and lake settings. Moreover, the seismic events may also have triggered local and regional flooding by breakup of ice and sediment barriers.

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“…The late-and post-glacial fragmentation of rocks and the deformation of glacial, lacustrine and alluvial sediments was presumably the cause of large earthquakes as described by researchers for different localities in the western part of the Fennoscandian crystalline shield (Kujansuu, 1964;Lundqvist & Lagerbäck, 1976;Bungum & Lindholm, 1997;Kuivamäki et al, 1998;Mörner, 1985Mörner, , 2003Mörner et al, 2003;Olesen et al, 1992;Sjöberg, 1994;Lagerbäck & Sundh, 2008;Kukkonen et al, 2011). Similar studies were carried out for the eastern Fennoscandia, which consists of Russian Karelia, the Kola Peninsula, and the Karelian Isthmus (Lukashov, 1995(Lukashov, , 2004Nikonov & Zykov, 1996;Zykov, 2001;Nikolaeva, 2006;Nikonov, 2008;2012;Nikonov et al, 2014;Nikonov & Shvarev, 2015;Nikolaeva et al, 2017;Shvarev & Rodkin, 2018).…”

Section: Introductionmentioning

confidence: 97%

The active tectonics of the Vuoksi Fault Zone in the Karelian Isthmus: parameters of paleoearthquakes estimated from bedrock and softsediment deformation features

Шварев¹,

Никонов²,

Родкин³

et al. 2018

Bull Geol Soc Finland

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The area under study is located in the southeastern periphery of the Fennoscandian crystalline shield. At present this is a tectonically quiet region without large seismic events. But it is well known that in post-glacial time the Fennoscandian shield was an arena of active postglacial tectonics and large earthquakes. The evidence for such events was found in various parts of Fennoscandia. The traces left by some paleoearthquakes show an undisputed character of large post-glacial faults some tens of kilometres long and of a few meters in displacement. However, some other features left by earthquakes are under discussion. Numerous deformations in bedrock and in soft sediments which can be considered as being due to earthquakes were found in the Russian Karelia. Interpretation of some of these deformation structures can lead to different conclusions about their origin, for example, weathering, cryogenic, glacial, and gravitational factors. One possible way to overcome these difficulties is an integrated study of different types of deformations at key sites, comparison of these with each other and with the tectonic features of the region, and the search for common structural and kinematic features. Another problem is the estimation of parameters of paleoearthquakes. This problem includes the determinations of their location, intensities, magnitudes, and age.

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Postglacial Fault Drilling in Northern Europe: Workshop in Skokloster, Sweden

Cited by 4 publications

References 9 publications

Glacial isostatic adjustment in Fennoscandia—A review of data and modeling

Glacial isostatic adjustment in Fennoscandia—A review of data and modeling

Potential secondary events caused by early Holocene paleoearthquakes in Fennoscandia – a climate-related review

The active tectonics of the Vuoksi Fault Zone in the Karelian Isthmus: parameters of paleoearthquakes estimated from bedrock and softsediment deformation features

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