Crustal structure of the NE Rockall Trough from wide‐angle seismic data modeling

Klingelhöfer, F.; Edwards, R. A.; Hobbs, R. W.; England, Richard

doi:10.1029/2005jb003763

Cited by 62 publications

(78 citation statements)

References 42 publications

(79 reference statements)

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“…SIGMA line 2 (Korenaga et al 2000) and AMP line E (Klingelhöfer et al 2005) form a conjugate transect just to the south of the Greenland-IcelandFaroe Ridge (Fig. 4a).…”

Section: Conjugate Transects South Of Icelandmentioning

confidence: 99%

“…The model of SIGMA line 2 is based on tomography, in which both the crust and any overlying volcanic rocks are modelled as one continuous layer (Korenaga et al 2000). In contrast, the model for AMP line E is divided into several layers (Klingelhöfer et al 2005), which distinguishes both a volcanic cover and up to four layers in the crystalline crust. However, both lines show a HVLC in the COT.…”

Section: Conjugate Transects South Of Icelandmentioning

confidence: 99%

“…On AMP line E (Fig. 3a) (Klingelhöfer et al 2005) in the northern Rockall Basin, the minimum crustal thickness is 12 km, twice as much as in the south. No mantle refractions are observed on AMP line E and there is no indication of mantle serpentinization on the cross-line (AMP line D) (Klingelhöfer et al 2005).…”

mentioning

confidence: 99%

“…At Lousy Bank, AMP line E (Fig. 3a) indicates that initial oceanic crustal thickness may be as great as 28 km (Klingelhöfer et al 2005), further south at Hatton Bank it is 17 km (iSIMM Hatton dip line in Fig. 3b) (White & Smith 2009) and at Edoras Bank it is about 14 km (Fig.…”

mentioning

confidence: 99%

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A review of the NE Atlantic conjugate margins based on seismic refraction data

Funck

Gaina

Geissler

et al. 2016

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The NE Atlantic region evolved through several rift episodes, leading to break-up in the Eocene that was associated with voluminous magmatism along the conjugate margins of East Greenland and NW Europe. Existing seismic refraction data provide good constraints on the overall tectonic development of the margins, despite data gaps at the NE Greenland shear margin and the southern Jan Mayen microcontinent. The maximum thickness of the initial oceanic crust is 40 km at the Greenland-Iceland-Faroe Ridge, but decreases with increasing distance to the Iceland plume. High-velocity lower crust interpreted as magmatic underplating or sill intrusions is observed along most margins but disappears north of the East Greenland Ridge and the Lofoten margin, with the exception of the Vestbakken Volcanic Province at the SW Barents Sea margin. South of the narrow Lofoten margin, the European side is characterized by wide margins. The opposite trend is seen in Greenland, with a wide margin in the NE and narrow margins elsewhere. The thin crust beneath the basins is generally underlain by rocks with velocities of .7 km s 21 interpreted as serpentinized mantle in the Porcupine and southern Rockall basins; while off Norway, alternative interpretations such as eclogite bodies and underplating are also discussed.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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“…SIGMA line 2 (Korenaga et al 2000) and AMP line E (Klingelhöfer et al 2005) form a conjugate transect just to the south of the Greenland-IcelandFaroe Ridge (Fig. 4a).…”

Section: Conjugate Transects South Of Icelandmentioning

confidence: 99%

Section: Conjugate Transects South Of Icelandmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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A review of the NE Atlantic conjugate margins based on seismic refraction data

Funck

Gaina

Geissler

et al. 2016

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“…Seismic refraction data from the northwest European and Greenland margin pair reveal evidence for lower crustal intrusions of magma in an area that was also of elevated mantle temperature influenced by the Icelandic plume [159]. Other margins have been studied with seismic and gravity data in the west of the British Isles [174], at Goban Spur [175], Edoras Bank [176], Rockall Trough [177], the Eastern Black Sea [178] and the Arctic [179]. Some margins were created by lateral movements of tectonic plates.…”

Section: (D) Passive Continental Margin Structurementioning

confidence: 99%

Aspects of marine geoscience: a review and thoughts on potential for observing active processes and progress through collaboration between the ocean sciences

Mitchell

2012

Phil. Trans. R. Soc. A.

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Much progress has been made in the UK in characterizing the internal structures of major physiographic features in the oceans and in developing understanding of the geological processes that have created or shaped them. UK researchers have authored articles of high impact in all areas described here. In contrast to terrestrial geoscience, however, there have been few instrumented observations made of active processes by UK scientists. This is an area that could be developed over the next decades in the UK. Research on active processes has the potential ability to engage the wider public: Some active processes present significant geo-hazards to populations and offshore infrastructure that require monitoring and there could be commercial applications of technological developments needed for science. Some of the suggestions could involve studies in shallow coastal waters where ship costs are much reduced, addressing tighter funding constraints over the near term. The possibilities of measuring aspects of volcanic eruptions, flowing lava, turbidity currents and mass movements (landslides) are discussed. A further area of potential development is in greater collaboration between the ocean sciences. For example, it is well known in terrestrial geomorphology that biological agents are important in modulating erosion and the transport of sediments, ultimately affecting the shape of the Earth's surface in various ways. The analogous effect of biology on large-scale geomorphology in the oceans is also known but remains poorly quantified. Physical oceanographic models are becoming increasingly accurate and could be used to study further the patterns of erosion, particle transport and deposition in the oceans. Marine geological and geophysical data could in turn be useful for further verification of such models. Adapting them to conditions of past oceans could address the shorter-period movements, such as due to internal waves and tides, which have been barely addressed in palaeoceanography.

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Deep crustal structure of the northeastern Gulf of Mexico: Implications for rift evolution and seafloor spreading

et al. 2014

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We image deep crustal structure using marine seismic refraction data recorded by a linear array of ocean-bottom seismometers in the Gulf of Mexico Basin Opening project (GUMBO Line 3) in order to provide new constraints on the nature of continental and oceanic crust in the northeastern Gulf of Mexico. GUMBO Line 3 extends~524 km from the continental shelf offshore Pensacola, Florida, across the De Soto Canyon and into the central Gulf basin. Travel times from long offset, wide angle reflections and refractions resolve compressional seismic velocities and layer boundaries for sediment, crystalline crust, and upper mantle. We compare our results with coincident multichannel seismic reflection data. Our velocity model recovers shallow seismic velocities (~2.0-4.5 km/s) that we interpret as evaporites and clastic sediments. A Cretaceous carbonate platform is interpreted beneath the De Soto Canyon with seismic velocities >5.0 km/s. Crystalline continental crust thins seaward along GUMBO Line 3 from 23-10 km across the De Soto Canyon. High seismic velocity lower crust (>7.2 km/s) is interpreted as extensive syn-rift magmatism and possibly mafic underplating, common features at volcanic rift margins with high mantle potential temperatures. In the central Gulf basin we interpret thick oceanic crust (>8 km) emplaced at a slow full-spreading rate (~24 mm/yr). We suggest a sustained thermal anomaly during slow seafloor-spreading conditions led to voluminous basalt flows from a spreading ridge that overprinted seafloor magnetic anomalies in the northeastern Gulf of Mexico.

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Crustal structure of the NE Rockall Trough from wide‐angle seismic data modeling

Cited by 62 publications

References 42 publications

A review of the NE Atlantic conjugate margins based on seismic refraction data

A review of the NE Atlantic conjugate margins based on seismic refraction data

Aspects of marine geoscience: a review and thoughts on potential for observing active processes and progress through collaboration between the ocean sciences

Deep crustal structure of the northeastern Gulf of Mexico: Implications for rift evolution and seafloor spreading

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