Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading
The complex Ungava fault zone lies in the Davis Strait and separates failed spreading centres in the Labrador Sea and Baffin Bay. This study focuses on coastal exposures east of the fault-bound Sisimiut basin, where the onshore expressions of these fault systems and the influence of pre-existing bas...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.628.2720 2023-05-15T15:35:01+02:00 Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading Robert W. Wilson Knud Erik S. Klint Jeroen A. M. Van Gool Kenneth J. W. Mccaffrey Robert E. Holdsworth James A. Chalmers The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.628.2720 http://www.geus.dk/publications/bull/nr11/nr11_p185-204.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.628.2720 http://www.geus.dk/publications/bull/nr11/nr11_p185-204.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geus.dk/publications/bull/nr11/nr11_p185-204.pdf faults and fractures extensional tectonics wrench systems sedimentary basins basement reactivation West text ftciteseerx 2016-01-08T15:19:26Z The complex Ungava fault zone lies in the Davis Strait and separates failed spreading centres in the Labrador Sea and Baffin Bay. This study focuses on coastal exposures east of the fault-bound Sisimiut basin, where the onshore expressions of these fault systems and the influence of pre-existing basement are examined. Regional lineament studies identify five main systems: N–S, NNE–SSW, ENE–WSW, ESE–WNW and NNW–SSE. Field studies reveal that strike-slip movements predominate, and are consistent with a ~NNE–SSW-oriented sinistral wrench system. Extensional faults trending N–S and ENE–WSW (basement-parallel), and compressional faults trending E–W, were also identified. The relative ages of these fault systems have been interpreted using cross-cutting relationships and by correlation with previously identified structures. A two-phase model for fault development fits the development of both the onshore fault systems observed in this study and regional tectonic structures offshore. The conclusions from this study show that the fault patterns and sense of movement on faults onshore reflect the stress fields that govern the opening of the Labrador Sea – Davis Strait – Baffin Bay seaway, and that the wrench couple on the Ungava transform system played a dominant role in the development of the onshore fault patterns. Text Baffin Bay Baffin Bay Baffin Davis Strait Greenland Labrador Sea Sisimiut Unknown Baffin Bay Greenland Sisimiut ENVELOPE(-53.674,-53.674,66.939,66.939) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
topic |
faults and fractures extensional tectonics wrench systems sedimentary basins basement reactivation West |
spellingShingle |
faults and fractures extensional tectonics wrench systems sedimentary basins basement reactivation West Robert W. Wilson Knud Erik S. Klint Jeroen A. M. Van Gool Kenneth J. W. Mccaffrey Robert E. Holdsworth James A. Chalmers Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading |
topic_facet |
faults and fractures extensional tectonics wrench systems sedimentary basins basement reactivation West |
description |
The complex Ungava fault zone lies in the Davis Strait and separates failed spreading centres in the Labrador Sea and Baffin Bay. This study focuses on coastal exposures east of the fault-bound Sisimiut basin, where the onshore expressions of these fault systems and the influence of pre-existing basement are examined. Regional lineament studies identify five main systems: N–S, NNE–SSW, ENE–WSW, ESE–WNW and NNW–SSE. Field studies reveal that strike-slip movements predominate, and are consistent with a ~NNE–SSW-oriented sinistral wrench system. Extensional faults trending N–S and ENE–WSW (basement-parallel), and compressional faults trending E–W, were also identified. The relative ages of these fault systems have been interpreted using cross-cutting relationships and by correlation with previously identified structures. A two-phase model for fault development fits the development of both the onshore fault systems observed in this study and regional tectonic structures offshore. The conclusions from this study show that the fault patterns and sense of movement on faults onshore reflect the stress fields that govern the opening of the Labrador Sea – Davis Strait – Baffin Bay seaway, and that the wrench couple on the Ungava transform system played a dominant role in the development of the onshore fault patterns. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Robert W. Wilson Knud Erik S. Klint Jeroen A. M. Van Gool Kenneth J. W. Mccaffrey Robert E. Holdsworth James A. Chalmers |
author_facet |
Robert W. Wilson Knud Erik S. Klint Jeroen A. M. Van Gool Kenneth J. W. Mccaffrey Robert E. Holdsworth James A. Chalmers |
author_sort |
Robert W. Wilson |
title |
Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading |
title_short |
Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading |
title_full |
Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading |
title_fullStr |
Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading |
title_full_unstemmed |
Faults and fractures in central West Greenland: onshore expression of continental break-up and sea-floor spreading |
title_sort |
faults and fractures in central west greenland: onshore expression of continental break-up and sea-floor spreading |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.628.2720 http://www.geus.dk/publications/bull/nr11/nr11_p185-204.pdf |
long_lat |
ENVELOPE(-53.674,-53.674,66.939,66.939) |
geographic |
Baffin Bay Greenland Sisimiut |
geographic_facet |
Baffin Bay Greenland Sisimiut |
genre |
Baffin Bay Baffin Bay Baffin Davis Strait Greenland Labrador Sea Sisimiut |
genre_facet |
Baffin Bay Baffin Bay Baffin Davis Strait Greenland Labrador Sea Sisimiut |
op_source |
http://www.geus.dk/publications/bull/nr11/nr11_p185-204.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.628.2720 http://www.geus.dk/publications/bull/nr11/nr11_p185-204.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766365318308954112 |