Asymmetric geophysical signatures in the Greenland-Norwegian and Southern Labrador Seas and the Eurasia Basin

Vogt, Peter R.; Kovacs, L. C.; Bernero, C.; Srivastava, S. P.

doi:10.1016/0040-1951(82)90036-1

Cited by 57 publications

(35 citation statements)

References 33 publications

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“…for the termination of spreading, which agrees well with chrons C7-C8 on the CK95 timescale [Cande and Kent, 1995]. Vogt et al [1982] noted a systematic topographic/gravity asymmetry across the active Kolbeinsey, Mohns, and Knipovich Ridges, as well as across the extinct Aegir Ridge. Such a regional asymmetry is not observed along the central or southern Mid-Atlantic Ridge.…”

Section: Introductionsupporting

confidence: 78%

A gravity and magnetic anomaly study of the extinct Aegir Ridge, Norwegian Sea

Jung¹,

Vogt²

1997

J. Geophys. Res.

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Section: Introductionsupporting

confidence: 78%

A gravity and magnetic anomaly study of the extinct Aegir Ridge, Norwegian Sea

Jung¹,

Vogt²

1997

J. Geophys. Res.

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“…It has been divided into a southern, carbonate- Vogt et al [1982aVogt et al [ , 1982b, Sundvor and Austegard [1990], Trettin [1991], and Scott et al [1995]. Frame depicts location of map of Figure 2.…”

Section: Geological Situationmentioning

confidence: 99%

“…While the kinematic mode and amounts of displacements between Greenland and Ellesmere Island along the linear channel of the Nares Strait are still matters of debate [e.g., Dawes and Kerr, 1982;Johnson and Srivastava, 1982;Higgins and Soper, 1989;Okulitch et al, 1990], the present positions of Greenland and Barents Shelf are the result of seafloor spreading in the Arctic ocean (Eurasia Basin) and Norwegian-Greenland sea. Plate motions began at anomaly 24 time (Late PaleoceneEarly Eocene) and led to a dextral transcurrent transfer of Svalbard relative to north Greenland along the De Geer Fault [e.g., Harland, 1969;Kristoffersen and Talwani, 1977;Talwani and Eldholm, 1977;Vogt et al, 1982a;Srivastava, 1985;Srivastava and Tapscott, 1986;CASE Team, 2001]. Oblique separation of the Barents Shelf from north Greenland began at anomaly 13 time (Oligocene) [e.g., Talwani and Eldholm, 1977;Myhre et al, 1982;Sundvor and Austegard, 1990].…”

Section: Introductionmentioning

confidence: 99%

Eurekan transpressive deformation in the Wandel Hav Mobile Belt (northeast Greenland)

Gosen

Piepjohn²

2003

Tectonics

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Besides the ∼W‐E trending Kap Cannon Thrust Zone and Harder Fjord Fault Zone, the 300 km long and NW‐SE striking Wandel Hav Mobile Belt represents the third major fault zone in north Greenland. Structural analyses in several areas of this belt suggest that compressive deformation is characterized by transpressive dextral strike‐slip kinematics. This is demonstrated by a combination of folding around ∼W‐E axes, approximately north and south directed reverse faulting, and dextral strike‐slip displacements along NW‐SE trending fault lines. The initial formation of the long, linear faults is interpreted to be related to deformational events in Late Paleozoic, Triassic‐Jurassic, and Late Cretaceous times. Due to the lack of structural evidence, we assume that deformations led to the generation of extension faults which probably were reactivated during dextral strike‐slip tectonism. It is suggested that dextral transpressive deformation was coeval with ∼N‐S compression at the Harder Fjord Fault Zone and Cap Cannon Thrust Zone and took place during Eocene (Eurekan) times. Dextral strike‐slip tectonism in the Wandel Hav Mobile Belt was the result of ∼N‐S compression due to a general northward movement of the Greenland plate. As a zone of crustal weakness, the belt can be interpreted as the onshore equivalent of the main transcurrent fault zone (De Geer Fault) which caused the intracontinental dextral slip of Svalbard (Barents Shelf) relative to north Greenland during Early Tertiary (Eurekan) times and prior to their separation. In this configuration, it represents one part of the belt of Eurekan deformation which extends from the Canadian Arctic islands over north Greenland to the Barents Shelf where compressive deformation is recorded in the West Spitsbergen Fold‐and‐Thrust Belt.

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“…Although it remains unknown if this asymmetric spreading is accomplished by detachment faulting (e.g. Escartin et al, 2008), the generally smoother basement relief on the faster-spreading flanks (Vogt et al, 1982) appears consistent with this mechanism. However, this would extend detachment faulting to opening rates below the lower limit of 14 mm/a suggested on the basis of very limited data by Tucholke et al (2008).…”

Section: Geological Environment Of Treitel Ridgementioning

confidence: 64%

“…MJR and YP, Morris Jesup Rise and Yermak Plateau; MR, Mohns Ridge; JMFZ, Jan Mayen Fracture Zone; JMR, Jan Mayen Ridge; KR, Kolbeinsey Ridge; FFZ, Faeroes Fracture Zone; IFR, Iceland-Faeroes Ridge; CGFZ, Charlie Gibbs Fracture Zone. near its southwestern terminus, with generally higher topography and free-air gravity, but slower spreading, on the western flanks of the Aegir Ridge north of Iceland (Vogt et al, 1982) but south of 66°N (Jung and Vogt, 1997). Although it remains unknown if this asymmetric spreading is accomplished by detachment faulting (e.g.…”

Section: Geological Environment Of Treitel Ridgementioning

confidence: 96%