Articles | Volume 13, issue 1
https://doi.org/10.5194/se-13-85-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-13-85-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Impact of Timanian thrust systems on the late Neoproterozoic–Phanerozoic tectonic evolution of the Barents Sea and Svalbard
Jean-Baptiste P. Koehl
CORRESPONDING AUTHOR
Centre for Earth Evolution and Dynamics (CEED), University of Oslo, P.O. Box 1028 Blindern, 0315 Oslo, Norway
Department of Geosciences, UiT The Arctic University of Norway in
Tromsø, 9037 Tromsø, Norway
Research Centre for Arctic Petroleum Exploration (ARCEx), UiT The
Arctic University of Norway in Tromsø, 9037 Tromsø, Norway
CAGE – Centre for Arctic Gas Hydrate, Environment and Climate, UiT
The Arctic University of Norway in Tromsø, 9037 Tromsø, Norway
Craig Magee
School of Earth Science and Environment, University of Leeds, Leeds,
LS2 9JT, UK
Ingrid M. Anell
Department of Geosciences, University of Oslo, P.O. Box 1047 Blindern,
0316 Oslo, Norway
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Jean-Baptiste P. Koehl, John E. A. Marshall, and Gilda Lopes
Solid Earth, 13, 1353–1370, https://doi.org/10.5194/se-13-1353-2022, https://doi.org/10.5194/se-13-1353-2022, 2022
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The paper reviews age constraints for a short-lived episode of deformation in Svalbard (Ellesmerian and Svalbardian orogenies) that is thought to have occurred ca. 380–360 million years ago. The review mostly discusses (but is not limited to) paleontological, palynological, and geochronological evidence. The review finds it most unlikely that the event discussed ever occurred in Svalbard.
Jean-Baptiste P. Koehl, Steffen G. Bergh, and Arthur G. Sylvester
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The San Andreas fault is a major active fault associated with ongoing earthquake sequences in southern California. The present study investigates the development of the Indio Hills area in the Coachella Valley along the main San Andreas fault and the Indio Hills fault. The Indio Hills area is located near an area with high ongoing earthquake activity (Brawley seismic zone), and, therefore, its recent tectonic evolution has implications for earthquake prediction.
Jean-Baptiste P. Koehl
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By using seismic data and fieldwork, this contribution shows that soft, coal-rich sedimentary rocks absorbed most of early Cenozoic, Eurekan, contractional deformation in central Spitsbergen, thus suggesting that no contractional deformation event is needed in the Late Devonian to explain the deformation differences among late Paleozoic sedimentary rocks. It also shows that the Billefjorden Fault Zone, a major crack in the Earth's crust in Svalbard, is probably segmented.
Jean-Baptiste P. Koehl
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Svalbard is thought to have been involved into a contractional event ca. 360 Ma, the Ellesmerian Orogeny. New field data and interpretation of seismic data instead suggest that Svalbard was affected by an episode of continuous extension in the Devonian–Carboniferous (ca. 420–300 Ma) with exhumation of basement ridges, followed by an episode of contraction in the early Cenozoic (ca. 65–45 Ma), the Eurekan tectonic event, and that the Ellesmerian Orogeny did not affect Svalbard.
Jean-Baptiste P. Koehl and Jhon M. Muñoz-Barrera
Solid Earth, 9, 1535–1558, https://doi.org/10.5194/se-9-1535-2018, https://doi.org/10.5194/se-9-1535-2018, 2018
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This research is dedicated to the study of poorly understood coal-bearing Mississippian (ca. 360–325 Ma) sedimentary rocks in central Spitsbergen. Our results suggest that these rocks were deposited during a period of widespread extension involving multiple fault trends, including faults striking subparallel to the extension direction, while overlying Pennsylvanian rocks (ca. 325–300 Ma) were deposited during extension localized along fewer, larger faults.
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We dated the formation of large faults in order to constrain the tectonic and exhumation history of the Barents Sea and northern Norway. Some of the dated faults formed apprx. 1 Ga and are much older than expected. However, most dated faults were active during two periods of extension: 375–325 and 315–265 Ma. The study of minerals along these cracks shows that exposed rocks in Finnmark were exhumed from deep (> 10 km) to shallow depth (< 3.5 km) during the two periods of extension.
Jean-Baptiste P. Koehl, Steffen G. Bergh, Tormod Henningsen, and Jan Inge Faleide
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The goal of this work is to study large cracks in the Earth's crust called faults near the coast of northern Norway in the SW Barents Sea. We interpreted seismic data (equivalent to X-ray diagram of the Earth) that showed the presence of a large fault near the coast of Norway, which contributed to building the mountain chain observed in Norway and later helped open the North Atlantic Ocean, separating Greenland from Norway.
Jean-Baptiste P. Koehl, John E. A. Marshall, and Gilda Lopes
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The paper reviews age constraints for a short-lived episode of deformation in Svalbard (Ellesmerian and Svalbardian orogenies) that is thought to have occurred ca. 380–360 million years ago. The review mostly discusses (but is not limited to) paleontological, palynological, and geochronological evidence. The review finds it most unlikely that the event discussed ever occurred in Svalbard.
Jean-Baptiste P. Koehl, Steffen G. Bergh, and Arthur G. Sylvester
Solid Earth, 13, 1169–1190, https://doi.org/10.5194/se-13-1169-2022, https://doi.org/10.5194/se-13-1169-2022, 2022
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The San Andreas fault is a major active fault associated with ongoing earthquake sequences in southern California. The present study investigates the development of the Indio Hills area in the Coachella Valley along the main San Andreas fault and the Indio Hills fault. The Indio Hills area is located near an area with high ongoing earthquake activity (Brawley seismic zone), and, therefore, its recent tectonic evolution has implications for earthquake prediction.
Jean-Baptiste P. Koehl
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By using seismic data and fieldwork, this contribution shows that soft, coal-rich sedimentary rocks absorbed most of early Cenozoic, Eurekan, contractional deformation in central Spitsbergen, thus suggesting that no contractional deformation event is needed in the Late Devonian to explain the deformation differences among late Paleozoic sedimentary rocks. It also shows that the Billefjorden Fault Zone, a major crack in the Earth's crust in Svalbard, is probably segmented.
Craig Magee and Christopher Aiden-Lee Jackson
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Injection of vertical sheets of magma (dyke swarms) controls tectonic and volcanic processes on Earth and other planets. Yet we know little of the 3D structure of dyke swarms. We use seismic reflection data, which provides ultrasound-like images of Earth's subsurface, to study a dyke swarm in 3D for the first time. We show that (1) dyke injection occurred in the Late Jurassic, (2) our data support previous models of dyke shape, and (3) seismic data provides a new way to view and study dykes.
Jean-Baptiste P. Koehl
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Revised manuscript not accepted
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Svalbard is thought to have been involved into a contractional event ca. 360 Ma, the Ellesmerian Orogeny. New field data and interpretation of seismic data instead suggest that Svalbard was affected by an episode of continuous extension in the Devonian–Carboniferous (ca. 420–300 Ma) with exhumation of basement ridges, followed by an episode of contraction in the early Cenozoic (ca. 65–45 Ma), the Eurekan tectonic event, and that the Ellesmerian Orogeny did not affect Svalbard.
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3-D seismic reflection data reveal that deepwater volcanoes have rugged basal contacts, which truncate underlying strata, and erupted lava flows that feed lobate lava fans. The lava flows (> 9 km long) account for 50–97 % of the total erupted volume. This indicates that deepwater volcanic edifices may thus form a minor component (~ 3–50 %) of the extrusive system and that accurate estimates of erupted volume require knowledge of the basal surface of genetically related lava flows.
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This research is dedicated to the study of poorly understood coal-bearing Mississippian (ca. 360–325 Ma) sedimentary rocks in central Spitsbergen. Our results suggest that these rocks were deposited during a period of widespread extension involving multiple fault trends, including faults striking subparallel to the extension direction, while overlying Pennsylvanian rocks (ca. 325–300 Ma) were deposited during extension localized along fewer, larger faults.
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We dated the formation of large faults in order to constrain the tectonic and exhumation history of the Barents Sea and northern Norway. Some of the dated faults formed apprx. 1 Ga and are much older than expected. However, most dated faults were active during two periods of extension: 375–325 and 315–265 Ma. The study of minerals along these cracks shows that exposed rocks in Finnmark were exhumed from deep (> 10 km) to shallow depth (< 3.5 km) during the two periods of extension.
Jean-Baptiste P. Koehl, Steffen G. Bergh, Tormod Henningsen, and Jan Inge Faleide
Solid Earth, 9, 341–372, https://doi.org/10.5194/se-9-341-2018, https://doi.org/10.5194/se-9-341-2018, 2018
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Short summary
The goal of this work is to study large cracks in the Earth's crust called faults near the coast of northern Norway in the SW Barents Sea. We interpreted seismic data (equivalent to X-ray diagram of the Earth) that showed the presence of a large fault near the coast of Norway, which contributed to building the mountain chain observed in Norway and later helped open the North Atlantic Ocean, separating Greenland from Norway.
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Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Seismics, seismology, paleoseismology, geoelectrics, and electromagnetics | Discipline: Geophysics
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Srishti Singh and Radheshyam Yadav
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Laura Petrescu, Silvia Pondrelli, Simone Salimbeni, Manuele Faccenda, and the AlpArray Working Group
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Sebastian Heimann, Hannes Vasyura-Bathke, Henriette Sudhaus, Marius Paul Isken, Marius Kriegerowski, Andreas Steinberg, and Torsten Dahm
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Simón Lissa, Nicolás D. Barbosa, J. Germán Rubino, and Beatriz Quintal
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We quantify the effects that 3-D fractures with realistic distributions of aperture have on seismic wave attenuation and velocity dispersion. Attenuation and dispersion are caused by fluid pressure diffusion between the fractures and the porous background. We show that (i) both an increase in the density of contact areas and a decrease in their correlation length reduce attenuation and (ii) a simple planar fracture can be used to emulate the seismic response of realistic fracture models.
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Plate-scale rifting is frequently expressed by the subsidence of structural basins along an axis, but postdating tectonic and magmatic activity mostly obscures them. A 3-D subsurface imaging and facies analysis down to 1 km reveals uniquely preserved Galilean basins subsiding along a failing rift front in two main stages. Rifting within a large releasing jog (20–9 Ma), followed by localized grabenization off the Dead Sea fault plate boundary (9–5 Ma), prevents them from dying out peacefully.
Dietrich Lange, Frederik Tilmann, Tim Henstock, Andreas Rietbrock, Danny Natawidjaja, and Heidrun Kopp
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Short summary
The present study shows evidence of fault systems (large cracks in the Earth's crust) hundreds to thousands of kilometers long and several kilometers thick extending from northwestern Russia to the northern Norwegian Barents Sea and the Svalbard Archipelago using seismic, magnetic, and gravimetric data. The study suggests that the crust in Svalbard and the Barents Sea was already attached to Norway and Russia at ca. 650–550 Ma, thus challenging existing models.
The present study shows evidence of fault systems (large cracks in the Earth's crust) hundreds...