Extended correlation of the Paleogene Faroe Islands and East Greenland plateau basalts

Søager, Nina; Holm, Paul Martin

doi:10.1016/j.lithos.2008.10.002

Cited by 22 publications

(40 citation statements)

References 41 publications

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“…The REE element data for the separate groups correspond well to the data from Søager & Holm (2009;2011) and therefore, their isotopic arguments for the separate mantle source components of the separate Enni Formation groups can reasonably be extended to the sub-group data in this study. This infers that although the High-Ti groups are very similar on the basis of many chemical criteria, that they also comprise distinct and coherent magmatic batches coming from depth and which erupted at the surface as distinct petrogenetic suites.…”

Section: Lava Group Subdivisionssupporting

confidence: 76%

“…The Malinstindur and Enni formations have been correlated, based on basalt geochemistry, with the Milne Land Formation (Larsen et al, 1999) and subsequently the Geikie Plateau and Rømer Fjord Formations (Søager & Holm, 2009) …”

Section: Discussionmentioning

confidence: 99%

“…Enni Formation is presented by (Rasmussen & Noe-Nygaard, 1969;Søager & Holm, 2009, 2011) with further spot sample analyses being published by Waagstein (1977) and Hald & Waagstein (1983).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…The low TiO 2 compositions, recognised as MORB-like by Waagstein (1988), are proposed to have been sourced from the incipient rift zone to the north of the Faroe Islands at the time. These groups were investigated in more detail by spot sampling across the islands where one low TiO 2 group (LowTi <1.5 wt %) and three high TiO 2 groups (High-Ti1, 2 & 3 all >1.5 wt %) were identified based on trace element and isotopic constraints (Søager & Holm, 2009). …”

Section: Accepted M Manuscriptmentioning

confidence: 99%

See 3 more Smart Citations

Geochemical stratigraphy and correlation within large igneous provinces: The final preserved stages of the Faroe Islands Basalt Group

Millett

Hole

Jolley

et al. 2017

Lithos

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Section: Lava Group Subdivisionssupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

See 2 more Smart Citations

Geochemical stratigraphy and correlation within large igneous provinces: The final preserved stages of the Faroe Islands Basalt Group

Millett

Hole

Jolley

et al. 2017

Lithos

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“…Subsequently, the Iceland plumerelated magmatic activity formed the GreenlandFaroe province (GIR and FIR in Fig. 1) from the Eocene onwards (Soager & Holm 2009). However, age-progressing seamount chains are absent from the NE Atlantic region.…”

Section: Soifs and Oceanic Crust Formationmentioning

confidence: 99%

Seamounts and oceanic igneous features in the NE Atlantic: a link between plate motions and mantle dynamics

Gaina

Blischke

Geissler

et al. 2016

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A new regional compilation of seamount-like oceanic igneous features (SOIFs) in the NE Atlantic points to three distinct oceanic areas of abundant seamount clusters. Seamounts on oceanic crust dated 54-50 Ma are formed on smooth oceanic basement, which resulted from high spreading rates and magmatic productivity enhanced by higher than usual mantle plume activity. Late Eocene-Early Miocene SOIF clusters are located close to newly formed tectonic features on rough oceanic crust in the Irminger, Iceland and Norway basins, reflecting an unstable tectonic regime prone to local readjustments of mid-ocean ridge and fracture zone segments accompanied by extra igneous activity. A SOIF population observed on Mid-Miocene-Present rough oceanic basement in the Greenland and Lofoten basins, and on conjugate Kolbeinsey Ridge flanks, coincides with an increase in spreading rate and magmatic productivity. We suggest that both tectonic/kinematic and magmatic triggers produced Mid-Miocene-Present SOIFs, but the Early Miocene westwards ridge relocation may have played a role in delaying SOIF formation south of the Jan Mayen Fracture Zone. We conclude that Iceland plume episodic activity combined with regional changes in relative plate motion led to local mid-ocean ridge readjustments, which enhanced the likelihood of seamount formation.

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Transient mantle cooling linked to regional volcanic shut-down and early rifting in the North Atlantic Igneous Province

et al. 2020

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The Paleocene to Early Eocene Faroe Islands Basalt Group (FIBG) comprises a c. 6.5-km-thick lava flow-dominated sequence located within the centre of the North Atlantic Igneous Province (NAIP). The currently defined pre-breakup and syn-breakup sequences of the FIBG are separated by a significant volcanic hiatus, during which time the coal-bearing Prestfjall Formation was deposited. This major volcanic hiatus is identified across large parts of the NAIP and was preceded on the Faroe Islands by a reduction in eruption rate evidenced by an increased number and thickness of inter-lava sedimentary beds between the simple lava flows of the pre-breakup Beinisvørd Formation. High tempo eruptions resumed after this hiatus with the development of the compound lava flow fields of the Malinstindur Formation which reveal limited evidence for inter-lava breaks. In order to investigate this key transition, flow by flow geochemical sampling of a composite c.1.1-km-thick lava flow sequence spanning this transition were collected and analysed. Three chemically distinct groups are defined based on rare earth elements (REEs) and incompatible trace element signatures. Two high-Ti groups (TiO 2 > 2 wt%), B2 and B3, dominate the sampled Beinisvørd Formation and display light REE-enriched signatures (La/Yb N c. 2.9-5.9) and evidence for garnet in the source melting region (Dy/Yb N c. 1.5-1.6). At the very top of the Beinisvørd Formation, a distinct group of lava flows, B1, displaying lower TiO 2 for a given MgO wt% (TiO 2 c. 1-2 wt%), weakly light REE-enriched profiles (La/Yb N c. 1.7-2.4) and a spinel-dominated mantle melting signature (Dy/Yb N c. 1.1-1.2) is identified. Sr, Nd and Pb isotopic signatures for the three groups overlap, revealing limited evidence of crustal contamination, and therefore supporting a mantle melting origin for inter-group variations, rather than source composition or contamination. The group B1 lava flows form a unique stratigraphic occurrence on the islands and provide clear evidence for both a reduction in the initial pressure of melting, alongside an increase in the overall degree of partial melting relative to groups B2 and B3. Increased partial melting is interpreted as evidence for the early onset of rifting and lithospheric thinning to the north of the Faroe Islands. The accompanying reduction in initial pressure of melting provides the first petrological evidence that a transient reduction in mantle temperature leads to the province-wide volcanic hiatus. Our study demonstrates an intimate linkage between rifting history and fluctuations in mantle temperature highlighting that any over-arching model for the evolution of the NAIP must take both into equal account.

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Extended correlation of the Paleogene Faroe Islands and East Greenland plateau basalts

Cited by 22 publications

References 41 publications

Geochemical stratigraphy and correlation within large igneous provinces: The final preserved stages of the Faroe Islands Basalt Group

Geochemical stratigraphy and correlation within large igneous provinces: The final preserved stages of the Faroe Islands Basalt Group

Seamounts and oceanic igneous features in the NE Atlantic: a link between plate motions and mantle dynamics

Transient mantle cooling linked to regional volcanic shut-down and early rifting in the North Atlantic Igneous Province

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