Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge
Seafloor spreading is accommodated by volcanic and tectonic processes along the global mid-ocean ridge system. As spreading rate decreases, the influence of volcanism also decreases, and it is unknown whether significant volcanism occurs at all at ultraslow spreading rates (<1.5 cm yr -1). Here w...
Main Authors: | , , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Columbia University
2001
|
Subjects: | |
Online Access: | https://dx.doi.org/10.7916/d8-b9mw-3041 https://academiccommons.columbia.edu/doi/10.7916/d8-b9mw-3041 |
id |
ftdatacite:10.7916/d8-b9mw-3041 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.7916/d8-b9mw-3041 2023-05-15T14:29:13+02:00 Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge Edwards, Margo Kurras, Gregory Tolstoy, Maya Bohnenstiehl, Delwayne R. Coakley, Bernard J. Cochran, James R. 2001 https://dx.doi.org/10.7916/d8-b9mw-3041 https://academiccommons.columbia.edu/doi/10.7916/d8-b9mw-3041 unknown Columbia University https://dx.doi.org/10.1038/35057258 Geophysics FOS Earth and related environmental sciences Marine geophysics Mid-ocean ridges Sea-floor spreading Volcanism Text Articles article-journal ScholarlyArticle 2001 ftdatacite https://doi.org/10.7916/d8-b9mw-3041 https://doi.org/10.1038/35057258 2021-11-05T12:55:41Z Seafloor spreading is accommodated by volcanic and tectonic processes along the global mid-ocean ridge system. As spreading rate decreases, the influence of volcanism also decreases, and it is unknown whether significant volcanism occurs at all at ultraslow spreading rates (<1.5 cm yr -1). Here we present three-dimensional sonar maps of the Gakkel ridge, Earth's slowest spreading mid-ocean ridge, located in the Arctic basin under the Arctic Ocean ice canopy. We acquired this data using hull-mounted sonars attached to a nuclear-powered submarine, the USS Hawkbill. Sidescan data for the ultraslow-spreading (~1.0 cm yr- 1) eastern Gakkel ridge depict two young volcanoes covering approximately 720 km2 of an otherwise heavily sedimented axial valley. The western volcano coincides with the average location of epicentres for more than 250 teleseismic events detected in 1999, suggesting that an axial eruption was imaged shortly after its occurrence. These findings demonstrate that eruptions along the ultraslow-spreading Gakkel ridge are focused at discrete locations and appear to be more voluminous and occur more frequently than was previously thought. Text Arctic Basin Arctic Arctic Ocean DataCite Metadata Store (German National Library of Science and Technology) Arctic Arctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geophysics FOS Earth and related environmental sciences Marine geophysics Mid-ocean ridges Sea-floor spreading Volcanism |
spellingShingle |
Geophysics FOS Earth and related environmental sciences Marine geophysics Mid-ocean ridges Sea-floor spreading Volcanism Edwards, Margo Kurras, Gregory Tolstoy, Maya Bohnenstiehl, Delwayne R. Coakley, Bernard J. Cochran, James R. Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge |
topic_facet |
Geophysics FOS Earth and related environmental sciences Marine geophysics Mid-ocean ridges Sea-floor spreading Volcanism |
description |
Seafloor spreading is accommodated by volcanic and tectonic processes along the global mid-ocean ridge system. As spreading rate decreases, the influence of volcanism also decreases, and it is unknown whether significant volcanism occurs at all at ultraslow spreading rates (<1.5 cm yr -1). Here we present three-dimensional sonar maps of the Gakkel ridge, Earth's slowest spreading mid-ocean ridge, located in the Arctic basin under the Arctic Ocean ice canopy. We acquired this data using hull-mounted sonars attached to a nuclear-powered submarine, the USS Hawkbill. Sidescan data for the ultraslow-spreading (~1.0 cm yr- 1) eastern Gakkel ridge depict two young volcanoes covering approximately 720 km2 of an otherwise heavily sedimented axial valley. The western volcano coincides with the average location of epicentres for more than 250 teleseismic events detected in 1999, suggesting that an axial eruption was imaged shortly after its occurrence. These findings demonstrate that eruptions along the ultraslow-spreading Gakkel ridge are focused at discrete locations and appear to be more voluminous and occur more frequently than was previously thought. |
format |
Text |
author |
Edwards, Margo Kurras, Gregory Tolstoy, Maya Bohnenstiehl, Delwayne R. Coakley, Bernard J. Cochran, James R. |
author_facet |
Edwards, Margo Kurras, Gregory Tolstoy, Maya Bohnenstiehl, Delwayne R. Coakley, Bernard J. Cochran, James R. |
author_sort |
Edwards, Margo |
title |
Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge |
title_short |
Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge |
title_full |
Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge |
title_fullStr |
Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge |
title_full_unstemmed |
Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge |
title_sort |
evidence of recent volcanic activity on the ultraslow-spreading gakkel ridge |
publisher |
Columbia University |
publishDate |
2001 |
url |
https://dx.doi.org/10.7916/d8-b9mw-3041 https://academiccommons.columbia.edu/doi/10.7916/d8-b9mw-3041 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) |
geographic |
Arctic Arctic Ocean Gakkel Ridge |
geographic_facet |
Arctic Arctic Ocean Gakkel Ridge |
genre |
Arctic Basin Arctic Arctic Ocean |
genre_facet |
Arctic Basin Arctic Arctic Ocean |
op_relation |
https://dx.doi.org/10.1038/35057258 |
op_doi |
https://doi.org/10.7916/d8-b9mw-3041 https://doi.org/10.1038/35057258 |
_version_ |
1766303289775751168 |