Please use this identifier to cite or link to this item: http://dlib.scu.ac.ir/handle/1956/4490
Title: Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center
subject: Knipovich Ridge;Ultra-slow spreading;Crustal structure;Refraction seismics;Ocean bottom seismometer;Multichannel seismic reflection;VDP::Mathematics and natural science: 400
Publisher: Springer
Description: A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. The youngest parts of the crust in the immediate vicinity of the ridge reveal fractured Oceanic Layer 2 and thermally expanded and possibly serpentinized Oceanic Layer 3. The mature part of the crust has normal thickness and seismic velocities with no significant crustal thickness and seismic velocity variations. Mature Oceanic Layer 2 is in addition broken into several rotated fault blocks. Comparison with a profile acquired *40 km north of the segment center reveals significant differences. Along this profile, reported earlier, periods of slower spreading led to generation of thin crust with a high P-wave velocity (Vp), composed of a mixture of gabbro and serpentinized mantle, while periods of faster spreading led to generation of more normal gabbroic crust. For the profile across the segment center no clear relation exists between spreading rate and crustal thickness and seismic velocity. In this study we have found that higher magmatism may lead to generation of oceanic crust with normal thickness even at ultra-slow spreading rates.
Journal Article
publishedVersion
URI: https://bora.uib.no/handle/1956/4490
More Information: Marine Geophysical Researches 31: 173–195
http://hdl.handle.net/1956/4490
10.1007/s11001-010-9095-8
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center
subject: Knipovich Ridge;Ultra-slow spreading;Crustal structure;Refraction seismics;Ocean bottom seismometer;Multichannel seismic reflection;VDP::Mathematics and natural science: 400
Publisher: Springer
Description: A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. The youngest parts of the crust in the immediate vicinity of the ridge reveal fractured Oceanic Layer 2 and thermally expanded and possibly serpentinized Oceanic Layer 3. The mature part of the crust has normal thickness and seismic velocities with no significant crustal thickness and seismic velocity variations. Mature Oceanic Layer 2 is in addition broken into several rotated fault blocks. Comparison with a profile acquired *40 km north of the segment center reveals significant differences. Along this profile, reported earlier, periods of slower spreading led to generation of thin crust with a high P-wave velocity (Vp), composed of a mixture of gabbro and serpentinized mantle, while periods of faster spreading led to generation of more normal gabbroic crust. For the profile across the segment center no clear relation exists between spreading rate and crustal thickness and seismic velocity. In this study we have found that higher magmatism may lead to generation of oceanic crust with normal thickness even at ultra-slow spreading rates.
Journal Article
publishedVersion
URI: https://bora.uib.no/handle/1956/4490
More Information: Marine Geophysical Researches 31: 173–195
http://hdl.handle.net/1956/4490
10.1007/s11001-010-9095-8
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center
subject: Knipovich Ridge;Ultra-slow spreading;Crustal structure;Refraction seismics;Ocean bottom seismometer;Multichannel seismic reflection;VDP::Mathematics and natural science: 400
Publisher: Springer
Description: A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. The youngest parts of the crust in the immediate vicinity of the ridge reveal fractured Oceanic Layer 2 and thermally expanded and possibly serpentinized Oceanic Layer 3. The mature part of the crust has normal thickness and seismic velocities with no significant crustal thickness and seismic velocity variations. Mature Oceanic Layer 2 is in addition broken into several rotated fault blocks. Comparison with a profile acquired *40 km north of the segment center reveals significant differences. Along this profile, reported earlier, periods of slower spreading led to generation of thin crust with a high P-wave velocity (Vp), composed of a mixture of gabbro and serpentinized mantle, while periods of faster spreading led to generation of more normal gabbroic crust. For the profile across the segment center no clear relation exists between spreading rate and crustal thickness and seismic velocity. In this study we have found that higher magmatism may lead to generation of oceanic crust with normal thickness even at ultra-slow spreading rates.
Journal Article
publishedVersion
URI: https://bora.uib.no/handle/1956/4490
More Information: Marine Geophysical Researches 31: 173–195
http://hdl.handle.net/1956/4490
10.1007/s11001-010-9095-8
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.