The North Atlantic Igneous Province: A review of models for its formation

Meyer, R.; Wijk, Jolante van; Gernigon, Laurent

doi:10.1130/2007.2430(26)

Cited by 54 publications

(59 citation statements)

References 207 publications

(267 reference statements)

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“…Peate, Larsen & Lesher, 2003;Jerram et al 2009, this issue) and ignimbrites as well as plutonic or sheet intrusions (sills and/or dykes) (Table 1; Fig. 1 (Saunders et al 1997;Torsvik, Mosar & Eide, 2001;Jerram & Widdowson, 2005;Meyer, Van Wijk & Gernigon, 2007) (Table 1; Fig. 1).…”

Section: B Igneous Settingsmentioning

confidence: 95%

“…Maclennan & Jones, 2006;Meyer, Van Wijk & Gernigon, 2007;Saunders et al 2007). Published examples of some regional domal uplifts are listed in Table 2 (Fig.…”

Section: A Tectonic Settingsmentioning

confidence: 99%

“…Furthermore, it appears that a number of the uplifted regions and the parts of the NAIP with the most voluminous igneous production for this period, namely in the NW British Isles, the Faroe Islands, (central-east) CE Greenland and the Disko region in W Greenland (Upton, 1988;Saunders et al 1997;Meyer, Van Wijk & Gernigon, 2007), were emplaced in the vicinity of old orogenic sutures and/or fronts from the Palaeozoic Caledonian Orogen, at suture zones between Archaean-Proterozoic terranes at the conjugate East Greenland-NW European margins and at the suture zone between the Archaean NagssugtoqidianRinkian Orogen in the Disko-Baffin Island area (Figs 1, 2, 3).…”

Section: The Spatial Distribution Of Known and Inferred Magmatic Centmentioning

confidence: 99%

“…Meyer, Van Wijk & Gernigon, 2007 and references therein). Other mantle processes sometimes thought to result in voluminous magmatism in general include decompression melting in response to global-scale extension (Ziegler, 1992), and melting resulting from spontaneous upwellings of near-solidus buoyant mantle material (Raddick, Parmentier & Scheirer, 2002).…”

Section: A Competing Theories On the Naip Petrogenesismentioning

confidence: 99%

“…Other contemporaneous, smaller and more isolated parts of the NAIP are also shown in Figure 1. The CE Greenland-Faroe Islands Ridge and Iceland formed subsequent to the onset of seafloor spreading in the area (Meyer, Van Wijk & Gernigon, 2007). Exposed and submerged basaltic rocks of the NAIP extend roughly NE-SW for more than 2000 km along the conjugate East Greenland-NW European margins (Saunders et al 1997) (Fig.…”

Section: Introductionmentioning

confidence: 99%

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The onset of the North Atlantic Igneous Province in a rifting perspective

et al. 2009

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract -The processes that led to the onset and evolution of the North Atlantic Igneous Province (NAIP) have been a theme of debate in the past decades. A popular theory has been that the impingement on the lower lithosphere of a hot mantle plume (the 'Ancestral Iceland' plume) initiated the first voluminous outbursts of lava and initiated rifting in the North Atlantic area in Early Palaeogene times. Here we review previous studies in order to set the NAIP magmatism in a time-space context. We suggest that global plate reorganizations and lithospheric extension across old orogenic fronts and/or suture zones, aided by other processes in the mantle (e.g. local or regional scale upwellings prior to and during the final Early Eocene rifting), played a role in the generation of the igneous products recorded in the NAIP for this period. These events gave rise to the extensive Paleocene and Eocene igneous rocks in W Greenland, NW Britain and at the conjugate E Greenland-NW European margins. Many of the relatively large magmatic centres of the NAIP were associated with transient and geographically confined doming in Early Paleocene times prior to the final break-up of the North Atlantic area.

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Section: B Igneous Settingsmentioning

confidence: 95%

“…Maclennan & Jones, 2006;Meyer, Van Wijk & Gernigon, 2007;Saunders et al 2007). Published examples of some regional domal uplifts are listed in Table 2 (Fig.…”

Section: A Tectonic Settingsmentioning

confidence: 99%

Section: The Spatial Distribution Of Known and Inferred Magmatic Centmentioning

confidence: 99%

Section: A Competing Theories On the Naip Petrogenesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The onset of the North Atlantic Igneous Province in a rifting perspective

et al. 2009

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Conjugate volcanic rifted margins, seafloor spreading, and microcontinent: Insights from new high‐resolution aeromagnetic surveys in the Norway Basin

et al. 2015

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We have acquired and processed new aeromagnetic data that cover the entire oceanic Norway Basin located between the Møre volcanic rifted margin and the Jan Mayen microcontinent (JMMC). The new compilation allows us to revisit the structure of the conjugate volcanic (rifted) margins and the spreading evolution of the Norway Basin from the Early Eocene breakup time to the Late Oligocene when the Aegir Ridge became extinct. The volcanic margins (in a strict sense) that formed before the opening of the Norway Basin have been disconnected with the previous Jurassic-Mid-Cretaceous episode of crustal thinning. We also show evidence of relationships between the margin architecture, the breakup magmatism distribution along the continent-oceanic transition, and the subsequent oceanic segmentation. The Norway Basin shows a complex system of asymmetric oceanic segments locally affected by episodic ridge jumps. The new aeromagnetic compilation also confirms that a fan-shaped spreading evolution of the Norway Basin was clearly active before the cessation of seafloor spreading and extinction of the Aegir Ridge. An important Mid-Eocene kinematic event at around magnetic chron C21r can be recognized in the Norway Basin. This event coincides with the onset of diking and increasing rifting activity (and possible oceanic accretion?) between the proto-JMMC and the East Greenland margin. It led to a second phase of breakup and microcontinent formation in the Norwegian-Greenland Sea~26 Myrs later in the Oligocene.

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The T‐Reflection and the Deep Crustal Structure of the Vøring Margin, Offshore mid‐Norway

et al. 2017

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Seismic reflection data along volcanic passive margins frequently provide imaging of strong and laterally continuous reflections in the middle and lower crust. We have completed a detailed 2‐D seismic interpretation of the deep crustal structure of the Vøring Margin, offshore mid‐Norway, where high‐quality seismic data allow the identification of high‐amplitude reflections, locally referred to as the T‐Reflection. Using a dense seismic grid, we have mapped the geometry of the T‐Reflection in order to compare it with filtered Bouguer gravity anomalies and seismic refraction data. The T‐Reflection is identified between 7 and 10 s. Sometimes it consists of one single smooth reflection. However, it is frequently associated with a set of rough multiple reflections displaying discontinuous segments with varying geometries, amplitudes, and contact relationships. The T‐Reflection seems to be connected to deep sill networks and is locally identified at the continuation of basement high structures or terminates over fractures and faults. The T‐Reflection presents a low magnetic signal. The spatial correlation between the filtered positive Bouguer gravity anomalies and the deep dome‐shaped reflections indicates that the latter represent a high‐impedance boundary contrast associated with a high‐density and high‐velocity body. In ~50% of the outer Vøring Margin, the depth of the mapped T‐Reflection is found to correspond to the depth of the top of the Lower Crustal Body (LCB), which is characterized by high P wave velocities (>7 km/s). We present a tectonic scenario, where a large part of the deep crustal structure is composed of preserved upper continental crustal blocks and middle to lower crustal lenses of inherited high‐grade metamorphic rocks. Deep intrusions into the faulted crustal blocks are responsible for the rough character of the T‐Reflection, whereas intrusions into the ductile lower crust and detachment faults are likely responsible for its smoother character. Deep magma intrusions can be responsible for regional metamorphic processes leading to an increasing velocity of the lower crust to more than 7 km/s. The result is a heterogeneous LCB that likely represents a complex mixture of pre‐ to syn‐breakup mafic and ultramafic rocks (cumulates and sills) and old metamorphic rocks such as granulites and eclogites. An increasing degree of melting toward the breakup axis is responsible for an increasing proportion of cumulates and sill intrusions in the lower crust.

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The North Atlantic Igneous Province: A review of models for its formation

Cited by 54 publications

References 207 publications

The onset of the North Atlantic Igneous Province in a rifting perspective

The onset of the North Atlantic Igneous Province in a rifting perspective

Conjugate volcanic rifted margins, seafloor spreading, and microcontinent: Insights from new high‐resolution aeromagnetic surveys in the Norway Basin

The T‐Reflection and the Deep Crustal Structure of the Vøring Margin, Offshore mid‐Norway

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