Marine geophysical measurements on the continental margins of the Labrador Sea
Seismic refraction and magnetic data from the continental margins of Labrador and south Greenland are interpreted in relation to knowledge of onshore geology.Two high-velocity seismic layers are measured on the inner part of the continental shelf off northeast Labrador. These are tentatively correla...
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Language: | English |
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Canadian Science Publishing
1970
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Online Access: | http://dx.doi.org/10.1139/e70-020 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-020 |
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crcansciencepubl:10.1139/e70-020 2023-12-17T10:30:53+01:00 Marine geophysical measurements on the continental margins of the Labrador Sea Mayhew, Michael A. Drake, Charles L. Nafe, John E. 1970 http://dx.doi.org/10.1139/e70-020 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-020 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 7, issue 2, page 199-214 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1970 crcansciencepubl https://doi.org/10.1139/e70-020 2023-11-19T13:39:34Z Seismic refraction and magnetic data from the continental margins of Labrador and south Greenland are interpreted in relation to knowledge of onshore geology.Two high-velocity seismic layers are measured on the inner part of the continental shelf off northeast Labrador. These are tentatively correlated with Precambrian crystalline rock onshore. There is no evidence that Paleozoic rock is present offshore. No obvious expression of the Grenville front is seen in the seismic results.Two sediment layers of variable thickness overlie the two high-velocity layers, and have accumulated to as much as 2 km total thickness in some localities.The crustal structure of the Labrador basin is interpreted to extend beneath the outer part of the Labrador shelf. No evidence is found from the seismic refraction measurements for fault-control of the marginal channels on the Labrador shelf. Where observed, they appear to be erosional in nature.Considerable relief is present in the high-velocity basement rock beneath the south Greenland slope. It appears to outcrop halfway down the slope. Article in Journal/Newspaper Greenland Labrador Sea Canadian Science Publishing (via Crossref) Greenland Labrador Shelf ENVELOPE(-58.000,-58.000,56.000,56.000) Canadian Journal of Earth Sciences 7 2 199 214 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Mayhew, Michael A. Drake, Charles L. Nafe, John E. Marine geophysical measurements on the continental margins of the Labrador Sea |
topic_facet |
General Earth and Planetary Sciences |
description |
Seismic refraction and magnetic data from the continental margins of Labrador and south Greenland are interpreted in relation to knowledge of onshore geology.Two high-velocity seismic layers are measured on the inner part of the continental shelf off northeast Labrador. These are tentatively correlated with Precambrian crystalline rock onshore. There is no evidence that Paleozoic rock is present offshore. No obvious expression of the Grenville front is seen in the seismic results.Two sediment layers of variable thickness overlie the two high-velocity layers, and have accumulated to as much as 2 km total thickness in some localities.The crustal structure of the Labrador basin is interpreted to extend beneath the outer part of the Labrador shelf. No evidence is found from the seismic refraction measurements for fault-control of the marginal channels on the Labrador shelf. Where observed, they appear to be erosional in nature.Considerable relief is present in the high-velocity basement rock beneath the south Greenland slope. It appears to outcrop halfway down the slope. |
format |
Article in Journal/Newspaper |
author |
Mayhew, Michael A. Drake, Charles L. Nafe, John E. |
author_facet |
Mayhew, Michael A. Drake, Charles L. Nafe, John E. |
author_sort |
Mayhew, Michael A. |
title |
Marine geophysical measurements on the continental margins of the Labrador Sea |
title_short |
Marine geophysical measurements on the continental margins of the Labrador Sea |
title_full |
Marine geophysical measurements on the continental margins of the Labrador Sea |
title_fullStr |
Marine geophysical measurements on the continental margins of the Labrador Sea |
title_full_unstemmed |
Marine geophysical measurements on the continental margins of the Labrador Sea |
title_sort |
marine geophysical measurements on the continental margins of the labrador sea |
publisher |
Canadian Science Publishing |
publishDate |
1970 |
url |
http://dx.doi.org/10.1139/e70-020 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-020 |
long_lat |
ENVELOPE(-58.000,-58.000,56.000,56.000) |
geographic |
Greenland Labrador Shelf |
geographic_facet |
Greenland Labrador Shelf |
genre |
Greenland Labrador Sea |
genre_facet |
Greenland Labrador Sea |
op_source |
Canadian Journal of Earth Sciences volume 7, issue 2, page 199-214 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e70-020 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
7 |
container_issue |
2 |
container_start_page |
199 |
op_container_end_page |
214 |
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1785583986747113472 |