Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean
A high-resolution mapping and sampling study of the Gakkel ridge was accomplished during an international ice-breakerexpedition to the high Arctic and North Pole in summer 2001. For this slowest-spreading endmember of the global mid-ocean-ridgesystem, predictions were that magmatism should progressi...
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ftawi:oai:epic.awi.de:8602 2023-09-05T13:15:54+02:00 Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean Michael, P. J. Langmuir, C. H. Dick, H. J. B. Snow, J. E. Goldstein, S. L. Graham, D. W. Lehnert, K. Kurras, G. Jokat, Wilfried Mühe, R. Edmonds, H. N. 2003 https://epic.awi.de/id/eprint/8602/ https://doi.org/10.1038/nature01704 https://hdl.handle.net/10013/epic.19128 unknown Michael, P. J. , Langmuir, C. H. , Dick, H. J. B. , Snow, J. E. , Goldstein, S. L. , Graham, D. W. , Lehnert, K. , Kurras, G. , Jokat, W. orcid:0000-0002-7793-5854 , Mühe, R. and Edmonds, H. N. (2003) Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean , Nature, 423 (6943), pp. 956-961 . doi:10.1038/nature01704 <https://doi.org/10.1038/nature01704> , hdl:10013/epic.19128 EPIC3Nature, 423(6943), pp. 956-961 Article isiRev 2003 ftawi https://doi.org/10.1038/nature01704 2023-08-22T19:47:32Z A high-resolution mapping and sampling study of the Gakkel ridge was accomplished during an international ice-breakerexpedition to the high Arctic and North Pole in summer 2001. For this slowest-spreading endmember of the global mid-ocean-ridgesystem, predictions were that magmatism should progressively diminish as the spreading rate decreases along the ridge, and thathydrothermal activity should be rare. Instead, it was found that magmatic variations are irregular, and that hydrothermal activity isabundant. A 300-kilometre-long central amagmatic zone, where mantle peridotites are emplaced directly in the ridge axis, liesbetween abundant, continuous volcanism in the west, and large, widely spaced volcanic centres in the east. These observationsdemonstrate that the extent of mantle melting is not a simple function of spreading rate: mantle temperatures at depth or mantlechemistry (or both) must vary significantly along-axis. Highly punctuated volcanism in the absence of ridge offsets suggests thatfirst-order ridge segmentation is controlled by mantle processes of melting and melt segregation. The strong focusing of magmaticactivity coupled with faulting may account for the unexpectedly high levels of hydrothermal activity observed. Article in Journal/Newspaper Arctic Arctic Arctic Ocean North Pole Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) North Pole Nature 423 6943 956 961 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A high-resolution mapping and sampling study of the Gakkel ridge was accomplished during an international ice-breakerexpedition to the high Arctic and North Pole in summer 2001. For this slowest-spreading endmember of the global mid-ocean-ridgesystem, predictions were that magmatism should progressively diminish as the spreading rate decreases along the ridge, and thathydrothermal activity should be rare. Instead, it was found that magmatic variations are irregular, and that hydrothermal activity isabundant. A 300-kilometre-long central amagmatic zone, where mantle peridotites are emplaced directly in the ridge axis, liesbetween abundant, continuous volcanism in the west, and large, widely spaced volcanic centres in the east. These observationsdemonstrate that the extent of mantle melting is not a simple function of spreading rate: mantle temperatures at depth or mantlechemistry (or both) must vary significantly along-axis. Highly punctuated volcanism in the absence of ridge offsets suggests thatfirst-order ridge segmentation is controlled by mantle processes of melting and melt segregation. The strong focusing of magmaticactivity coupled with faulting may account for the unexpectedly high levels of hydrothermal activity observed. |
format |
Article in Journal/Newspaper |
author |
Michael, P. J. Langmuir, C. H. Dick, H. J. B. Snow, J. E. Goldstein, S. L. Graham, D. W. Lehnert, K. Kurras, G. Jokat, Wilfried Mühe, R. Edmonds, H. N. |
spellingShingle |
Michael, P. J. Langmuir, C. H. Dick, H. J. B. Snow, J. E. Goldstein, S. L. Graham, D. W. Lehnert, K. Kurras, G. Jokat, Wilfried Mühe, R. Edmonds, H. N. Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean |
author_facet |
Michael, P. J. Langmuir, C. H. Dick, H. J. B. Snow, J. E. Goldstein, S. L. Graham, D. W. Lehnert, K. Kurras, G. Jokat, Wilfried Mühe, R. Edmonds, H. N. |
author_sort |
Michael, P. J. |
title |
Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean |
title_short |
Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean |
title_full |
Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean |
title_fullStr |
Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean |
title_full_unstemmed |
Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean |
title_sort |
magmatic and amagmatic seafloor generation at the ultraslow-spreading gakkel ridge, arctic ocean |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/8602/ https://doi.org/10.1038/nature01704 https://hdl.handle.net/10013/epic.19128 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) |
geographic |
Arctic Arctic Ocean Gakkel Ridge North Pole |
geographic_facet |
Arctic Arctic Ocean Gakkel Ridge North Pole |
genre |
Arctic Arctic Arctic Ocean North Pole |
genre_facet |
Arctic Arctic Arctic Ocean North Pole |
op_source |
EPIC3Nature, 423(6943), pp. 956-961 |
op_relation |
Michael, P. J. , Langmuir, C. H. , Dick, H. J. B. , Snow, J. E. , Goldstein, S. L. , Graham, D. W. , Lehnert, K. , Kurras, G. , Jokat, W. orcid:0000-0002-7793-5854 , Mühe, R. and Edmonds, H. N. (2003) Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean , Nature, 423 (6943), pp. 956-961 . doi:10.1038/nature01704 <https://doi.org/10.1038/nature01704> , hdl:10013/epic.19128 |
op_doi |
https://doi.org/10.1038/nature01704 |
container_title |
Nature |
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423 |
container_issue |
6943 |
container_start_page |
956 |
op_container_end_page |
961 |
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1776197709058801664 |