Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments
The main representatives of ultraslow spreading ridges are the Arctic Ridge System (ARS) and the Southwest Indian Ridge (SWIR). As earthquakes indicate active crustal accretion, monitoring the seismicity provides information about the mechanical state of the lithosphere. The Lena Trough, part of the...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Universität Bremen
2012
|
Subjects: | |
Online Access: | https://media.suub.uni-bremen.de/handle/elib/269 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102487-10 |
id |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/269 |
---|---|
record_format |
openpolar |
spelling |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/269 2023-05-15T13:42:31+02:00 Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments Die Seismizität ultralangsam spreizender Mittelozeanischer Rücken über lokale, regionale und teleseismische Distanzen: Eine Fallstudie an kontrastierenden Segmenten Läderach, Christine Schlindwein, Vera Spiegel, Cornelia 2012-02-15 application/pdf https://media.suub.uni-bremen.de/handle/elib/269 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102487-10 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/269 urn:nbn:de:gbv:46-00102487-10 info:eu-repo/semantics/openAccess Alle Rechte vorbehalten ultraslow spreading mid-ocean ridge seismicity tectonics magmatic accretion earthquake swarm 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2012 ftsubbremen 2023-01-08T23:09:15Z The main representatives of ultraslow spreading ridges are the Arctic Ridge System (ARS) and the Southwest Indian Ridge (SWIR). As earthquakes indicate active crustal accretion, monitoring the seismicity provides information about the mechanical state of the lithosphere. The Lena Trough, part of the ARS, spreads obliquely and amagmatic. I relocalized the globally detected earthquakes to show the spatial distribution of the seismicity along the rift axis. During two surveys, our working group recorded the microseismicity of Lena Trough with seismic arrays deployed on ice floes. The second case study concerns the magmatic Orthogonal Supersegment of the SWIR. I accessed the regional dataset of the Neumayer seismic array in Antarctica lying in a distance of ~2100 km to the study area. The dataset contains 743 earthquakes and clearly shows four swarms occurring at an assumed volcanic centre. The new datasets allow a comprehensive evaluation lowering the detection threshold compared to the global station network. Active accretion episodes can be monitored in greater detail showing the spreading mechanisms at contrasting amagmatic and magmatic ridge segments. Doctoral or Postdoctoral Thesis Antarc* Antarctica Arctic Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Arctic Indian Neumayer |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
ultraslow spreading mid-ocean ridge seismicity tectonics magmatic accretion earthquake swarm 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
ultraslow spreading mid-ocean ridge seismicity tectonics magmatic accretion earthquake swarm 550 550 Earth sciences and geology ddc:550 Läderach, Christine Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments |
topic_facet |
ultraslow spreading mid-ocean ridge seismicity tectonics magmatic accretion earthquake swarm 550 550 Earth sciences and geology ddc:550 |
description |
The main representatives of ultraslow spreading ridges are the Arctic Ridge System (ARS) and the Southwest Indian Ridge (SWIR). As earthquakes indicate active crustal accretion, monitoring the seismicity provides information about the mechanical state of the lithosphere. The Lena Trough, part of the ARS, spreads obliquely and amagmatic. I relocalized the globally detected earthquakes to show the spatial distribution of the seismicity along the rift axis. During two surveys, our working group recorded the microseismicity of Lena Trough with seismic arrays deployed on ice floes. The second case study concerns the magmatic Orthogonal Supersegment of the SWIR. I accessed the regional dataset of the Neumayer seismic array in Antarctica lying in a distance of ~2100 km to the study area. The dataset contains 743 earthquakes and clearly shows four swarms occurring at an assumed volcanic centre. The new datasets allow a comprehensive evaluation lowering the detection threshold compared to the global station network. Active accretion episodes can be monitored in greater detail showing the spreading mechanisms at contrasting amagmatic and magmatic ridge segments. |
author2 |
Schlindwein, Vera Spiegel, Cornelia |
format |
Doctoral or Postdoctoral Thesis |
author |
Läderach, Christine |
author_facet |
Läderach, Christine |
author_sort |
Läderach, Christine |
title |
Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments |
title_short |
Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments |
title_full |
Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments |
title_fullStr |
Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments |
title_full_unstemmed |
Seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: A case study of contrasting segments |
title_sort |
seismicity of ultraslow spreading mid-ocean ridges at local, regional and teleseismic scales: a case study of contrasting segments |
publisher |
Universität Bremen |
publishDate |
2012 |
url |
https://media.suub.uni-bremen.de/handle/elib/269 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102487-10 |
geographic |
Arctic Indian Neumayer |
geographic_facet |
Arctic Indian Neumayer |
genre |
Antarc* Antarctica Arctic |
genre_facet |
Antarc* Antarctica Arctic |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/269 urn:nbn:de:gbv:46-00102487-10 |
op_rights |
info:eu-repo/semantics/openAccess Alle Rechte vorbehalten |
_version_ |
1766168808612954112 |