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Book Chapter

Regional distribution of volcanism within the North Atlantic Igneous Province

By
Jim Á Horni
Jim Á Horni
Jarðfeingi – Faroese Geological Survey, Jóannesar Paturssonargøta 32-34, Postbox 3059, FO-110 Tórshavn, Faroe Islands
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John R. Hopper
John R. Hopper
Geological Survey of Denmark and Greenland, Ø ster Voldgade 10, DK1350 Copenhagen K, Denmark
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Anett Blischke
Anett Blischke
Iceland GeoSurvey, Branch at Akureyri, Rangárvöllum, 602 Akureyri, Iceland
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Wolfram H. Geisler
Wolfram H. Geisler
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany
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Margaret Stewart
Margaret Stewart
British Geological Survey, Lyell Centre, Research Avenue South, Edinburgh EH14 4AP, UK
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Kenneth McDermott
Kenneth McDermott
University College Dublin, Stillorgan Rd, Belfield, Dublin 4, IrelandPresent address: ION, 31 Windsor Street, Chertsey, Surrey KT16 8AT, UK
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Maria Judge
Maria Judge
Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin D04 K7X4, Ireland
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Ögmundur Erlendsson
Ögmundur Erlendsson
Iceland GeoSurvey, Branch at Akureyri, Rangárvöllum, 602 Akureyri, Iceland
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Uni Árting
Uni Árting
Jarðfeingi – Faroese Geological Survey, Jóannesar Paturssonargøta 32-34, Postbox 3059, FO-110 Tórshavn, Faroe Islands
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Published:
January 01, 2017

Abstract:

An overview of the distribution of volcanic facies units was compiled over the North Atlantic region. The new maps establish the pattern of volcanism associated with breakup and the initiation of seafloor spreading over the main part of the North Atlantic Igneous Province (NAIP). The maps include new analysis of the Faroe–Shetlands region that allows for a consistent volcanic facies map to be constructed over the entire eastern margin of the North Atlantic for the first time. A key result is that the various conjugate margin segments show a number of asymmetric patterns that are interpreted to result in part from pre-existing crustal and lithospheric structures. The compilation further shows that while the lateral extent of volcanism extends equally far to the south of the Iceland hot spot as it does to the north, the volume of material emplaced to the south is nearly double of that to the north. This suggests that a possible southward deflection of the Iceland mantle plume is a long-lived phenomenon originating during or shortly after impact of the plume.

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Contents

Geological Society, London, Special Publications

The NE Atlantic Region. A Reappraisal of Crustal Structure, Tectonostratigraphy and Magmatic Evolution

G. Péron-Pinvidic
G. Péron-Pinvidic
Geological Survey of Norway, Norway
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J. R. Hopper
J. R. Hopper
Geological Survey of Denmark and Greenland, Denmark
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T. Funck
T. Funck
Geological Survey of Denmark and Greenland, Denmark
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M. S. Stoker
M. S. Stoker
British Geological Survey, UK
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C. Gaina
C. Gaina
University of Oslo, Norway
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J. C. Doornenbal
J. C. Doornenbal
Geological Survey of The Netherlands, The Netherlands
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U. E. Árting
U. E. Árting
Faroese Geological Survey, Faroe Islands
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The Geological Society of London
Volume
447
ISBN electronic:
978-1-78620-37-00
Publication date:
January 01, 2017

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