Potential mechanisms for the genesis of Cenozoic domal structures on the NE Atlantic margin: pros, cons and some new ideas

Doré, A. G.; Lundin, Erik; Kusznir, Nick; Pascal, Christophe

doi:10.1144/sp306.1

Cited by 98 publications

(113 citation statements)

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“…Doré & Lundin 1996;Japsen & Chalmers 2000;Lundin & Doré 2002;Ritchie et al 2003;Gomez & Verges 2005;Doré et al 2008;Stoker et al 2010;Tuitt et al 2010;Japsen et al 2012;Yamato et al 2013;Døss-ing et al 2016). Cenozoic compressional domes have been described on the Vøring, Faroe -Shetland and Hatton margins, in the Rockall Basin (for a short summary see Kimbell et al 2016), and in the NE Greenland margin (Price & Whitham 1997;Hamann et al 2005).…”

Section: Subduction In the Pacific And Mediterranean Realms And The mentioning

confidence: 99%

“…Doré et al 2008; and see the summary in Kimbell et al 2016). Previous studies have postulated a range of possible causes for post-break-up compression along the NE Atlantic margins, and they range from, for example, ridge-push and gravity potential forces, mantle convection (including small-scale convection along passive margins), far-field stresses, and differential compaction (for a comprehensive review see Doré et al 2008).…”

Section: Subduction In the Pacific And Mediterranean Realms And The mentioning

confidence: 99%

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Break-up and seafloor spreading domains in the NE Atlantic

Gaina

Nasuti

Kimbell

et al. 2017

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An updated magnetic anomaly grid of the NE Atlantic and an improved database of magnetic anomaly and fracture zone identifications allow the kinematic history of this region to be revisited. At break-up time, continental rupture occurred parallel to the Mesozoic rift axes in the south, but obliquely to the previous rifting trend in the north, probably due to the proximity of the Iceland plume at 57-54 Ma.The new oceanic lithosphere age grid is based on 30 isochrons (C) from C24n old (53.93 Ma) to C1n old (0.78 Ma), and documents ridge reorganizations in the SE Lofoten Basin, the Jan Mayen Fracture Zone region, in Iceland and offshore Faroe Islands. Updated continent -ocean boundaries, including the Jan Mayen microcontinent, and detailed kinematics of the EocenePresent Greenland-Eurasia relative motions are included in this model.Variations in the subduction regime in the NE Pacific could have caused the sudden northwards motion of Greenland and subsequent Eurekan deformation. These events caused seafloor spreading changes in the neighbouring Labrador Sea and a decrease in spreading rates in the NE Atlantic. Boundaries between major oceanic crustal domains were formed when the European Plate changed its absolute motion direction, probably caused by successive adjustments along its southern boundary.

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Section: Subduction In the Pacific And Mediterranean Realms And The mentioning

confidence: 99%

Section: Subduction In the Pacific And Mediterranean Realms And The mentioning

confidence: 99%

Break-up and seafloor spreading domains in the NE Atlantic

Gaina

Nasuti

Kimbell

et al. 2017

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“…As is well known, the World Stress Map (Heidbach et al 2008) shows that the current orientation of principal horizontal stress is less related to the direction of rifting than to the current direction of plate motion, giving present-day and presumably therefore palaeocompressive stresses at oblique angles to the margins. The relationship of such plate motion-induced stresses, or body-force stresses associated with plate boundaries, to observed strain phenomena is discussed in the paper by Doré et al (2008). Broad compression-related folds in the CretaceousCenozoic cover successions are observed over a wide area between the Mid-Norwegian shelf and the Rockall-Faroes area.…”

Section: Subtle Migration Pathsmentioning

confidence: 99%

Passive margins: overview

Levell

Argent

Doré³

et al. 2010

PGC

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Passive margins have been the reliable, accessible mainstay of exploration success worldwide for the last 25 years, and have hosted the spectacularly fast exploitation of deepwater resources (Angola, Nigeria, Brazil, Trinidad, USA Gulf of Mexico, Egypt, Australia and India). Despite, or perhaps because of this, there is still much to learn about the variety of hydrocarbon habitats they present.For example: (1) deep seismic observations and deep sea drilling have revealed more of the diversity of passive margins geodynamics. This liberates explorationists from simple geodynamic models, with consequences not only for new views of thermal history but also for the whole tectonic and stratigraphic evolution. For example, the time significance assigned to the geometries traditionally labelled 'pre-rift, syn-rift and sag' may be misleading. This has implications for correlations, the significance assigned to unconformities and sequence boundaries, heat flow and structural history. (2) New deep imaging of the sedimentary sections has revealed mistaken assumptions about the importance of 'mobile substrate' in major deltas and allowed the detailed unravelling of salt and shale movement and its implications for reservoir and trap. (3) Depositional models for deepwater reservoirs have increased in predictive capability and modern seismic imaging supports new models for shallow water sequences. (4) Discoveries of very large amounts of dry bacterial methane in stratigraphic traps have challenged old assumptions about prospectivity based on thermally matured source rocks. (5) New engineering and development technologies are opening up the commercialization of remote frontiers. As a consequence there is legitimate scope to re-visit old 'dogmas' and to propose that each passive margin segment is best regarded as unique, with analysis and interpretation rooted in observation rather than models (at least while the newly proposed models evolve to stability). Many of these themes were visited in the Passive Margins session of the Seventh Petroleum Geology Conference, held in London in 2009. This paper outlines some of these ideas, and considers how exploration along passive margins in the next decade can use new geoscience thinking.

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“…West of the Helland-Hansen Arch is the Mogdunn Arch (Fig. 1), and further south are the South Modgunn Arch, the Havsule Dome and the Isak Dome: all of these structures were active in the Miocene (Blystad et al 1995;Lundin & Doré 2002;Doré et al 2008). Doré et al (2008) identified a set of early 'tectonomagmatic' domes on the Norwegian margin, which are of Late Cretaceous -Paleocene age and related to break-up magmatism.…”

Section: Norwegian Marginmentioning

confidence: 99%

“…1) (e.g. Doré et al 2008;Ritchie et al 2008;Tuitt et al 2010), although there is also evidence of earlier compression Tuitt et al 2010;Lundin et al 2013). The aim of this paper is to use results from the NAG-TEC project to examine the relationship between the siting of the post-break-up compressional structures and the morphology and rheology of the margin established as a consequence of the preceding extensional history.…”

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confidence: 99%

Controls on the location of compressional deformation on the NW European margin

Kimbell

Stewart

Gradmann

et al. 2016

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The distribution of Cenozoic compressional structures along the NW European margin has been compared with maps of the thickness of the crystalline crust derived from a compilation of seismic refraction interpretations and gravity modelling, and with the distribution of high-velocity lower crust and/or partially serpentinized upper mantle detected by seismic experiments. Only a subset of the mapped compressional structures coincide with areas susceptible to lithospheric weakening as a result of crustal hyperextension and partial serpentinization of the upper mantle. Notably, partially serpentinized upper mantle is well documented beneath the central part of the southern Rockall Basin, but compressional features are sparse in that area. Where compressional structures have formed but the upper mantle is not serpentinized, simple rheological modelling suggests an alternative weakening mechanism involving ductile lower crust and lithospheric decoupling. The presence of pre-existing weak zones (associated with the properties of the gouge and overpressure in fault zones) and local stress magnitude and orientation are important contributing factors.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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Potential mechanisms for the genesis of Cenozoic domal structures on the NE Atlantic margin: pros, cons and some new ideas

Abstract: Abstract:The mild compressional structures of Cenozoic age on the passive margins bordering Norway, the UK, the Faroes and Ireland have been the subject of much discussion in the literature.

Cited by 98 publications

References 82 publications

Break-up and seafloor spreading domains in the NE Atlantic

Break-up and seafloor spreading domains in the NE Atlantic

Passive margins: overview

Controls on the location of compressional deformation on the NW European margin

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