Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean
We study the basement configuration in the slow-spreading Eurasia Basin, Arctic Ocean. Two multichannel seismic (MCS) profiles, which we acquired during ice-free conditions with a 3600 m long streamer, image the transition from the North Barents Sea Margin into the southern Eurasia Basin. The seismi...
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ftawi:oai:epic.awi.de:46649 2024-09-15T17:51:23+00:00 Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean Lutz, Rüdiger Franke, Dieter Berglar, Kai Heyde, Ingo Schreckenberger, Bernd Klitzke, Peter Geissler, Wolfram 2018 https://epic.awi.de/id/eprint/46649/ https://www.sciencedirect.com/science/article/pii/S0264370717301618 https://hdl.handle.net/10013/epic.3ce1d54f-9222-4818-b14c-801c8018684c unknown Elsevier Lutz, R. , Franke, D. , Berglar, K. , Heyde, I. , Schreckenberger, B. , Klitzke, P. and Geissler, W. orcid:0000-0001-6807-555X (2018) Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean , Journal of Geodynamics, 118 , pp. 154-165 . doi:10.1016/j.jog.2018.01.014 <https://doi.org/10.1016/j.jog.2018.01.014> , hdl:10013/epic.3ce1d54f-9222-4818-b14c-801c8018684c EPIC3Journal of Geodynamics, Elsevier, 118, pp. 154-165, ISSN: 0264-3707 Article isiRev 2018 ftawi https://doi.org/10.1016/j.jog.2018.01.014 2024-06-24T04:19:47Z We study the basement configuration in the slow-spreading Eurasia Basin, Arctic Ocean. Two multichannel seismic (MCS) profiles, which we acquired during ice-free conditions with a 3600 m long streamer, image the transition from the North Barents Sea Margin into the southern Eurasia Basin. The seismic lines resolve the up to 5000 m thick sedimentary section, as well as the crustal architecture of the southern Eurasia Basin along 120 km and 170 km, respectively. The seismic data show large faulted and rotated basement blocks. Gravity modeling indicates a thin basement with a thickness of 1–3 km and a density of 2.8*103 kg/m3 between the base of the sediments and the top of the mantle, which indicates exhumed and serpentinized mantle. The Gakkel spreading ridge, located in northern prolongation of the seismic lines is characterized by an amagmatic or sparsely magmatic segment. From the structural similarity between the basement close to the ultra-slow spreading ridge and our study area, we conclude that the basement in the Eurasia Basin is predominantly formed by exhumed and serpentinized mantle, with magmatic additions. An initial strike-slip movement of the Lomonosov Ridge along the North Barents Sea Margin and subsequent near-orthogonal opening of the Nansen Basin is supposed to have brought mantle material to the surface, which was serpentinized during this process. Continuous spreading thinned the serpentinized mantle and subsequent normal faulting produced distinct basement blocks. We propose that mantle exhumation has likely been active since the opening of the Eurasia Basin. Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Lomonosov Ridge Nansen Basin Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geodynamics 118 154 165 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We study the basement configuration in the slow-spreading Eurasia Basin, Arctic Ocean. Two multichannel seismic (MCS) profiles, which we acquired during ice-free conditions with a 3600 m long streamer, image the transition from the North Barents Sea Margin into the southern Eurasia Basin. The seismic lines resolve the up to 5000 m thick sedimentary section, as well as the crustal architecture of the southern Eurasia Basin along 120 km and 170 km, respectively. The seismic data show large faulted and rotated basement blocks. Gravity modeling indicates a thin basement with a thickness of 1–3 km and a density of 2.8*103 kg/m3 between the base of the sediments and the top of the mantle, which indicates exhumed and serpentinized mantle. The Gakkel spreading ridge, located in northern prolongation of the seismic lines is characterized by an amagmatic or sparsely magmatic segment. From the structural similarity between the basement close to the ultra-slow spreading ridge and our study area, we conclude that the basement in the Eurasia Basin is predominantly formed by exhumed and serpentinized mantle, with magmatic additions. An initial strike-slip movement of the Lomonosov Ridge along the North Barents Sea Margin and subsequent near-orthogonal opening of the Nansen Basin is supposed to have brought mantle material to the surface, which was serpentinized during this process. Continuous spreading thinned the serpentinized mantle and subsequent normal faulting produced distinct basement blocks. We propose that mantle exhumation has likely been active since the opening of the Eurasia Basin. |
format |
Article in Journal/Newspaper |
author |
Lutz, Rüdiger Franke, Dieter Berglar, Kai Heyde, Ingo Schreckenberger, Bernd Klitzke, Peter Geissler, Wolfram |
spellingShingle |
Lutz, Rüdiger Franke, Dieter Berglar, Kai Heyde, Ingo Schreckenberger, Bernd Klitzke, Peter Geissler, Wolfram Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean |
author_facet |
Lutz, Rüdiger Franke, Dieter Berglar, Kai Heyde, Ingo Schreckenberger, Bernd Klitzke, Peter Geissler, Wolfram |
author_sort |
Lutz, Rüdiger |
title |
Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean |
title_short |
Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean |
title_full |
Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean |
title_fullStr |
Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean |
title_full_unstemmed |
Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean |
title_sort |
evidence for mantle exhumation since the early evolution of the slow-spreading gakkel ridge, arctic ocean |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/46649/ https://www.sciencedirect.com/science/article/pii/S0264370717301618 https://hdl.handle.net/10013/epic.3ce1d54f-9222-4818-b14c-801c8018684c |
genre |
Arctic Arctic Ocean Barents Sea Lomonosov Ridge Nansen Basin |
genre_facet |
Arctic Arctic Ocean Barents Sea Lomonosov Ridge Nansen Basin |
op_source |
EPIC3Journal of Geodynamics, Elsevier, 118, pp. 154-165, ISSN: 0264-3707 |
op_relation |
Lutz, R. , Franke, D. , Berglar, K. , Heyde, I. , Schreckenberger, B. , Klitzke, P. and Geissler, W. orcid:0000-0001-6807-555X (2018) Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean , Journal of Geodynamics, 118 , pp. 154-165 . doi:10.1016/j.jog.2018.01.014 <https://doi.org/10.1016/j.jog.2018.01.014> , hdl:10013/epic.3ce1d54f-9222-4818-b14c-801c8018684c |
op_doi |
https://doi.org/10.1016/j.jog.2018.01.014 |
container_title |
Journal of Geodynamics |
container_volume |
118 |
container_start_page |
154 |
op_container_end_page |
165 |
_version_ |
1810293268247740416 |