Seismic study of the transform‐rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform

Funck, Thomas; Jackson, H. R.; Louden, K. E.; Klingelhöfer, F.

doi:10.1029/2006jb004308

Cited by 70 publications

(154 citation statements)

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“…Keen et al (2012) showed that the Labrador Sea is exemplified by the presence of excess magmatism, SDRs, and volcanic plateau and thick igneous crust. This agrees with the classification of Funck et al (2007) and Gerlings et al (2009).…”

Section: Magmatism and Influence Of The Mantle Plumesupporting

confidence: 82%

“…............... 48 , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013. Serpentinite zone from Nafe-Drake polynomial curve was interpreted in Baffin Bay, , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013. Serpentinite zone from Nafe-Drake polynomial curve was interpreted in Baffin Densities were then calculated as a function of velocities using four different methods and in comparison with published data of , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013.…”

Section: List Of Figuresmentioning

confidence: 99%

“…New COT boundaries have been interpreted based on multidisciplinary data integration of seismic reflection, refraction interpretation, gravity, magnetic 2D modelling and backstripping thermal subsidence modelling. ............... 48 , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013. Serpentinite zone from Nafe-Drake polynomial curve was interpreted in Baffin Bay, , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013.…”

Section: List Of Figuresmentioning

confidence: 99%

“…Serpentinite zone from Nafe-Drake polynomial curve was interpreted in Baffin Bay, , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013. Serpentinite zone from Nafe-Drake polynomial curve was interpreted in Baffin Densities were then calculated as a function of velocities using four different methods and in comparison with published data of , Funck et al (2007Funck et al ( , 2012, and Suckro et al (2012Suckro et al ( , 2013. Serpentinite zone from Nafe-Drake polynomial curve was interpreted in Baffin Bay, Figure 6.1: Regional tectonic framework of the west Greenland area generated by data integration of 2D seismic data (GEUS), structural provinces after Knutsen et al, (2012), seafloor data from Müller 2008, Global Seafloor Fabric and Magnetic chrons from Roest and Srivastava 1989;and Chalmers and Laursen (1995 shear-simple shear model (Lister et al, 1986), have described how crustal attenuation, followed by thermal subsidence and isostatic compensation have played the key roles in lithospheric and mantle geodynamics.…”

Section: List Of Figuresmentioning

confidence: 99%

“…A 250 km long oceanic crust and c.6 to 9-km thick transition is estimated from a 450 km long seismic refraction . Other issues related to the geodynamic evolution of the Western Greenland margin include the presence of 20 km thick igneous crust underlain by 4 km thick layer of unknown affinity and the tectonic significance of the Ungava transform fault zone (Funck et al, 2007;Funck et al, 2012). On the northern Baffin Bay, the transition zone to oceanic crust is characterised by a high gravity anomaly and magnetic anomalies dated as Eocene at N27-25N and 24N-13N (Whittaker et al, 1997;Oakey and Chalmers, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Tectonic variation and structural evolution of the West Greenland continental margin

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Section: Magmatism and Influence Of The Mantle Plumesupporting

confidence: 82%

Section: List Of Figuresmentioning

confidence: 99%

Section: List Of Figuresmentioning

confidence: 99%

Section: List Of Figuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tectonic variation and structural evolution of the West Greenland continental margin

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A crustal model for northern Melville Bay, Baffin Bay

et al. 2014

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The interpretation of seismic refraction and gravity data acquired in 2010 gives new insights into the crustal structure of the West Greenland coast and the adjacent deep central Baffin Bay basin. Underneath Melville Bay, the depth of the Moho varies between 26 and 17 km. Stretched continental crust with a thickness of 25 to 14 km and deep sedimentary basins are present in this area. The deep Melville Bay Graben contains an up to~11 km thick infill of consolidated and unconsolidated sediments with velocities of 1.6 to 4.9 km/s. Seaward, at the~60 km wide transition between oceanic and stretched continental crust, a mount-shaped magmatic structure is observed, which most likely formed prior to the initial formation of oceanic crust. The up to 4 km high magmatic structure is underlain by a~2 km thick and~50 km wide high velocity lower crust. More to the west, in the oceanic part of the Baffin Bay basin, we identify a two-layered, 3.5 to 6 km thin igneous oceanic crust with increasing thickness toward the shelf. Beneath the oceanic crust, the depth of the Moho ranges between 11.5 and 13.5 km. In the western part of the profile, oceanic layer 3 is unusually thin (~1.5 km) A possible explanation for the thin crust is accretion due to slow spreading, although the basement is notably smooth compared to the basement of other regions formed by ultra-slow spreading. The oceanic crust is underlain by partly serpentinized upper mantle with velocities of 7.6 to 7.8 km/s.

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The oceanic crustal structure at the extinct, slow to ultraslow Labrador Sea spreading center

et al. 2015

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Two seismic refraction lines were acquired along and across the extinct Labrador Sea spreading center during the Seismic Investigations off Greenland, Newfoundland and Labrador 2009 cruise. We derived two P wave velocity models using both forward modeling (RAYINVR) and traveltime tomography inversion (Tomo2D) with good ray coverage down to the mantle. Slow-spreading Paleocene oceanic crust has a thickness of 5 km, while the Eocene crust created by ultraslow spreading is as thin as 3.5 km. The upper crustal velocity is affected by fracturation due to a dominant tectonic extension during the waning stage of spreading, with a velocity drop of 0.5 to 1 km/s when compared to Paleocene upper crustal velocities (5.2-6.0 km/s). The overall crustal structure is similar to active ultraslow-spreading centers like the Mohns Ridge or the South West Indian Ridge with lower crustal velocities of 6.0-7.0 km/s. An oceanic core complex is imaged on a 50 km long segment of the ridge perpendicular line with serpentinized peridotites (7.3-7.9 km/s) found 1.5 km below the basement. The second, ridge-parallel line also shows extremely thin crust in the extinct axial valley, where 8 km/s mantle velocity is imaged just 1.5 km below the basement. This thin crust is interpreted as crust formed by ultraslow spreading, which was thinned by tectonic extension.

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Seismic study of the transform‐rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform

Cited by 70 publications

References 47 publications

Tectonic variation and structural evolution of the West Greenland continental margin

Tectonic variation and structural evolution of the West Greenland continental margin

A crustal model for northern Melville Bay, Baffin Bay

The oceanic crustal structure at the extinct, slow to ultraslow Labrador Sea spreading center

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