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SEAFLOOR STRUCTURE IN THE NORTH ATLANTIC BETWEEN THE KOLBEINSEI RIDGE AND THE JAN MAYEN MICROCONTINENT
1 Institute of Earthquake Prediction Theory and Mathematical Geophysics
2 Schmidt Institute of Physics of the Earth
3 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
4 Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences
2 Schmidt Institute of Physics of the Earth
3 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
4 Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences
Journal: Geophysical processes and biosphere
Tome: 17
Number: 4
Year: 2018
Pages: 59-75
UDK: 551.24
DOI: 10.21455/GPB2018.4-4
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Usenko S.V., Boyko A.N., Prokhorova T.V. SEAFLOOR STRUCTURE IN THE NORTH ATLANTIC BETWEEN THE KOLBEINSEI RIDGE AND THE JAN MAYEN MICROCONTINENT // . 2018. Т. 17. № 4. С. 59-75. DOI: 10.21455/GPB2018.4-4
@article{UsenkoSEAFLOOR2018,
author = "Usenko, S. V. and Boyko, A. N. and Prokhorova, T. V.",
title = "SEAFLOOR STRUCTURE IN THE NORTH ATLANTIC BETWEEN THE KOLBEINSEI RIDGE AND THE JAN MAYEN MICROCONTINENT",
journal = "Geophysical processes and biosphere",
year = 2018,
volume = "17",
number = "4",
pages = "59-75",
doi = "10.21455/GPB2018.4-4",
language = "English"
}
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Keywords: seismic surveys, Earth’s crust, rifting, heat flow, Iceland plume, magnetic anomalies
Аnnotation: Deep seismic sounding, continuous seismic profiling, and bathymetric data are used to discuss the structure of the Iceland Plateau and adjacent areas of the Norway-Greenland region. We tentatively suggest the existence of regional nearly North-South trending tectonic discontinuities; these are normal faults that make up the stepwise character of the Iceland plateau. The steps are successively descending westward. The fault zones contain magmatic features in the form of dikes that penetrate the sediment in several cases, thus providing evidence of their young age. A rift feature confined to magnetic anomaly C5b is tentatively identified in the central Iceland plateau based on some crustal peculiarities. The central Iceland plateau and the southern Jan Mayen basin show increased heat flow (92-217 mW/m2) whose lateral distribution suggests a boundary between the regions of increased and normal values. The boundary passes through the center of the Jan Mayen basin and trends nearly North-South. It seems to bound the zone of influence due to the Iceland mantle plume from the northeast at present.
