Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean
Gakkel ridge is the slowest spreading mid-ocean ridge with full rates <10 mm/y. In 1999, a teleseismic earthquake swarm signalled the onset of an eruptive episode at the 85°E volcanic complex. The Arctic Mid-Ocean Ridge expedition in 2001 detected a hydrothermal event plume and explosive seismoac...
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ftawi:oai:epic.awi.de:20440 2023-05-15T14:25:01+02:00 Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean Schlindwein, Vera Riedel, Carsten 2009 https://epic.awi.de/id/eprint/20440/ https://hdl.handle.net/10013/epic.32563 unknown Schlindwein, V. orcid:0000-0001-5570-2753 and Riedel, C. (2009) Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean , 69th annual meeting of the German Geophysical Society, Kiel, Germany. . hdl:10013/epic.32563 EPIC369th annual meeting of the German Geophysical Society, Kiel, Germany. Conference notRev 2009 ftawi 2021-12-24T15:33:25Z Gakkel ridge is the slowest spreading mid-ocean ridge with full rates <10 mm/y. In 1999, a teleseismic earthquake swarm signalled the onset of an eruptive episode at the 85°E volcanic complex. The Arctic Mid-Ocean Ridge expedition in 2001 detected a hydrothermal event plume and explosive seismoacoustic signals and, in 2007, the Arctic Gakkel Vents Expedition found evidence for recent deep submarine explosive activity at this site. The new data allowed a reassessment of the seismoacoustic events recorded in 2001. We undertake 2D finite difference wavefield modelling to locate the source of the signals and investigate the source mechanism: The explosion sounds result from mild submarine Strombolian eruptions at the southern rift valley wall at about 4000 m water depth. We believe that the explosion sounds are produced by bursting gas bubbles rising from a deep magmatic reservoir along a major fault which was activated during the large seismic and volcanic event in 1999. While ash particles in sediment samples of mid-ocean ridges yield increasing evidence for a widespread explosive component to the predominantly effusive mid-ocean ridge volcanism, we present here the first in-situ observation of deep submarine Strombolian explosions. Conference Object Arctic Arctic Arctic Ocean 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) |
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 |
Gakkel ridge is the slowest spreading mid-ocean ridge with full rates <10 mm/y. In 1999, a teleseismic earthquake swarm signalled the onset of an eruptive episode at the 85°E volcanic complex. The Arctic Mid-Ocean Ridge expedition in 2001 detected a hydrothermal event plume and explosive seismoacoustic signals and, in 2007, the Arctic Gakkel Vents Expedition found evidence for recent deep submarine explosive activity at this site. The new data allowed a reassessment of the seismoacoustic events recorded in 2001. We undertake 2D finite difference wavefield modelling to locate the source of the signals and investigate the source mechanism: The explosion sounds result from mild submarine Strombolian eruptions at the southern rift valley wall at about 4000 m water depth. We believe that the explosion sounds are produced by bursting gas bubbles rising from a deep magmatic reservoir along a major fault which was activated during the large seismic and volcanic event in 1999. While ash particles in sediment samples of mid-ocean ridges yield increasing evidence for a widespread explosive component to the predominantly effusive mid-ocean ridge volcanism, we present here the first in-situ observation of deep submarine Strombolian explosions. |
format |
Conference Object |
author |
Schlindwein, Vera Riedel, Carsten |
spellingShingle |
Schlindwein, Vera Riedel, Carsten Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean |
author_facet |
Schlindwein, Vera Riedel, Carsten |
author_sort |
Schlindwein, Vera |
title |
Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean |
title_short |
Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean |
title_full |
Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean |
title_fullStr |
Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean |
title_full_unstemmed |
Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean |
title_sort |
deep submarine strombolian eruptions at eastern gakkel ridge, arctic ocean |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/20440/ https://hdl.handle.net/10013/epic.32563 |
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 Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Arctic Ocean |
op_source |
EPIC369th annual meeting of the German Geophysical Society, Kiel, Germany. |
op_relation |
Schlindwein, V. orcid:0000-0001-5570-2753 and Riedel, C. (2009) Deep submarine Strombolian eruptions at eastern Gakkel ridge, Arctic Ocean , 69th annual meeting of the German Geophysical Society, Kiel, Germany. . hdl:10013/epic.32563 |
_version_ |
1766297450188898304 |