Late Mesozoic-Cenozoic evolution of the south-western Barents Sea in a regional rift-shear tectonic setting

Faleide, Jan Inge; Vågnes, Erling; Guðlaugsson, Steinar Þór

doi:10.1016/0264-8172(93)90104-z

Cited by 309 publications

(374 citation statements)

References 32 publications

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“…The GFZ has been dominated by stresses formed at the transition between the normal spreading to the south and the oblique-shear spreading regime within the De Geer Zone to the north [cf. Lundin and Doré, 2002;Mosar et al, 2002b;Mosar and Opsal, 2002;Faleide et al, 1993]. This supports that the cross sectional asymmetric morphology of the EGR could be caused by recurrently changing stresses across the GFZ.…”

Section: The Greenland Fracture Zonementioning

confidence: 72%

“…Figure 1, inset map). The combined GreenlandSenja Fracture Zones (GSFZ) represent a first-order plate tectonic boundary in the Norwegian-Greenland Sea initiated at the transition between a regional rift-dominated setting to the south and a megashear setting within the De Geer Zone to the north [Faleide et al, 1993;Mosar et al, 2002b].…”

Section: Geological Settingmentioning

confidence: 99%

“…During the earliest Oligocene (Chron A13, 33.3 Ma), opening of the Norwegian-Greenland Sea changed from a NNW to a NW/WNW direction and continuous spreading initiated along the Knipovich Ridge (KnR) eventually connecting the Arctic and the North Atlantic Oceans through the Fram Strait [Lundin and Doré, 2002;Mosar et al, 2002b]. This coincided with the termination of seafloor spreading in the Labrador Sea [Chalmers and Pulvertaft, 2001] and caused termination of transtension and transpression within the De Geer Zone [Faleide et al, 1993;Steel et al, 1985]. Because of the discontinuous character of magnetic anomalies to the north of the GSFZ, considerable uncertainty remains regarding crustal compositions within the Boreas Basin [e.g., Talwani and Eldholm, 1977;Vogt, 1986;Mosar and Opsal, 2002;Lundin and Doré, 2002;Tsikalas et al, 2002;Engen et al, 2008].…”

Section: Boreas Basinmentioning

confidence: 99%

“…Furthermore, if our tentative correlation of the S1 and S2 seismic sequences across the EGR is valid (Figure 5b; cf. section 3), the S3(BB) sediments in the NE fault province are at least of C24B-C13 age, but the deepest sediments may be of Mesozoic age as indicated by the similarity to basins interpreted on the nearby NE Greenland Shelf [Hamann et al, 2005] and on the SW Barents Shelf [e.g., Faleide et al, 1993]. This indicates that strike-slip pullapart tectonics governed the sedimentation in the NE fault province prior to Chron 13 time.…”

Section: Sedimentation In the Ne Fault Province And Opening Of The Bomentioning

confidence: 99%

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East Greenland Ridge in the North Atlantic Ocean: An integrated geophysical study of a continental sliver in a boundary transform fault setting

et al. 2008

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The combined Greenland‐Senja Fracture Zones (GSFZ) represent a first‐order plate tectonic feature in the North Atlantic Ocean. The GSFZ defines an abrupt change in the character of magnetic anomalies with well‐defined seafloor spreading anomalies in the Greenland and Norwegian basins to the south but ambiguous and weak magnetic anomalies in the Boreas Basin to the north. Substantial uncertainty exists concerning the plate tectonic evolution of the latter area, including the role of the East Greenland Ridge, which is situated along the Greenland Fracture Zone. In 2002, a combined ocean‐bottom seismometer and multichannel seismic (MCS) survey acquired two intersecting wide‐angle reflection and coincident MCS profiles across and along the East Greenland Ridge. We present the results of integrated reflection seismic interpretation, first‐arrival tomography, 2D kinematic raytracing, full‐wave amplitude modeling, and gravity modeling of the intersecting profiles. The results show that (1) the Greenland Basin is characterized by a normal oceanic crustal velocity structure, (2) the velocity structure of the East Greenland Ridge is of overall continental type, and (3) a major faulted basin province above highly extended continental crust exists to the NE of the ridge. The results further suggest that a zone of extremely thin and faulted continental crust above partially serpentinized mantle peridotite defines the NW edge of the East Greenland Ridge and the transition to the NE Greenland margin.

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Section: The Greenland Fracture Zonementioning

confidence: 72%

Section: Geological Settingmentioning

confidence: 99%

Section: Boreas Basinmentioning

confidence: 99%

Section: Sedimentation In the Ne Fault Province And Opening Of The Bomentioning

confidence: 99%

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East Greenland Ridge in the North Atlantic Ocean: An integrated geophysical study of a continental sliver in a boundary transform fault setting

et al. 2008

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“…Intense rifting in mid Jurassic to early Cretaceous occurred in the southwestern Barents Sea (Faleide et al, 2008(Faleide et al, , 1993. Westward shift in extensional rifting increased the amount of megasequences with time towards the present day continental-ocean boundary in the southwestern Barents Sea (Klitzke et al, 2014).…”

Section: Tectonic Evolution Of the Southwestern Barents Seamentioning

confidence: 99%

Deep-seated faults and hydrocarbon leakage in the Snøhvit Gas Field, Hammerfest Basin, Southwestern Barents Sea

Mohammedyasin

Lippard

Omosanya

et al. 2016

Marine and Petroleum Geology

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High-quality 3D seismic data are used to analyze the history of fault growth and hydrocarbon leakage in the Snøhvit Field, southwestern Barents Sea. The aim of this work is to evaluate the role of tectonic fracturing as a mechanism driving fluid-flow in the study area. To achieve this aim, an integrated approach including seismic interpretation, multiple seismic attribute analysis, fault modeling and displacement analysis was used.The six major faults in the study area are dip-slip normal faults which are characterized by complex lateral and vertical segmentation. The three main episodes of fault reactivation interpreted were in late Jurassic (Kimmeridgian), early Cretaceous and Paleocene times. Fault reactivation in the study area is mainly through dip-linkage. Throw-distance plots of the representative faults also revealed along-strike linkage and multi-skewed C-type profiles. The throw profiles show that faults in the study area evolved through polycyclic activity involving both blind propagation, syn-sedimentary activity and that they have their maximum displacement at the reservoir zone. The expansion and growth indices provide evidence for coeval fault activity with sedimentation and interaction of the faults with a free surface during their evolution.

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Miocene uplift of the NE Greenland margin linked to plate tectonics: Seismic evidence from the Greenland Fracture Zone, NE Atlantic

et al. 2016

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Tectonic models predict that following breakup, rift margins undergo only decaying thermal subsidence during their postrift evolution. However, postbreakup stratigraphy beneath the NE Atlantic shelves shows evidence of regional-scale unconformities, commonly cited as outer margin responses to inner margin episodic uplift, including the formation of coastal mountains. The origin of these events remains enigmatic. We present a seismic reflection study from the Greenland Fracture Zone-East Greenland Ridge (GFZ-EGR) and the NE Greenland shelf. We document a regional intra-Miocene seismic unconformity (IMU), which marks the termination of synrift deposition in the deep-sea basins and onset of (i) thermomechanical coupling across the GFZ, (ii) basin compression, and (iii) contourite deposition, north of the EGR. The onset of coupling across the GFZ is constrained by results of 2-D flexural backstripping. We explain the thermomechanical coupling and the deposition of contourites by the formation of a continuous plate boundary along the Mohns and Knipovich ridges, leading to an accelerated widening of the Fram Strait. We demonstrate that the IMU event is linked to onset of uplift and massive shelf progradation on the NE Greenland margin. Given an estimated middle to late Miocene (~15-10 Ma) age of the IMU, we speculate that the event is synchronous with uplift of the east and west Greenland margins. The correlation between margin uplift and plate motion changes further indicates that the uplift was triggered by plate tectonic forces, induced perhaps by a change in the Iceland plume (a hot pulse) and/or by changes in intraplate stresses related to global tectonics.

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Late Mesozoic-Cenozoic evolution of the south-western Barents Sea in a regional rift-shear tectonic setting

Cited by 309 publications

References 32 publications

East Greenland Ridge in the North Atlantic Ocean: An integrated geophysical study of a continental sliver in a boundary transform fault setting

East Greenland Ridge in the North Atlantic Ocean: An integrated geophysical study of a continental sliver in a boundary transform fault setting

Deep-seated faults and hydrocarbon leakage in the Snøhvit Gas Field, Hammerfest Basin, Southwestern Barents Sea

Miocene uplift of the NE Greenland margin linked to plate tectonics: Seismic evidence from the Greenland Fracture Zone, NE Atlantic

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