Mesozoic-Cenozoic regional stress field evolution in Svalbard
Cooling fracture orientations in diabase sills associated with the Cretaceous High Arctic Large Igneous Province and syn‐sedimentary Triassic faults help constrain a model for Svalbard's (NE Barents Shelf) Mesozoic stress field evolution. Fracture data from Edgeøya and adjacent islands in SE Sv...
Published in: | Tectonics |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | http://hdl.handle.net/10852/83184 http://urn.nb.no/URN:NBN:no-85939 https://doi.org/10.1029/2018TC005461 |
id |
ftoslouniv:oai:www.duo.uio.no:10852/83184 |
---|---|
record_format |
openpolar |
spelling |
ftoslouniv:oai:www.duo.uio.no:10852/83184 2023-05-15T15:11:25+02:00 Mesozoic-Cenozoic regional stress field evolution in Svalbard Maher, Harmon Senger, Kim Braathen, Alvar Mulrooney, Mark Joseph Smyrak-Sikora, Aleksandra Osmundsen, Per Terje Ogata, Kei 2020-10-01T12:48:27Z http://hdl.handle.net/10852/83184 http://urn.nb.no/URN:NBN:no-85939 https://doi.org/10.1029/2018TC005461 EN eng NFR/295208 http://urn.nb.no/URN:NBN:no-85939 Maher, Harmon Senger, Kim Braathen, Alvar Mulrooney, Mark Joseph Smyrak-Sikora, Aleksandra Osmundsen, Per Terje Ogata, Kei . Mesozoic-Cenozoic regional stress field evolution in Svalbard. Tectonics. 2020, 39(4) http://hdl.handle.net/10852/83184 1836153 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonics&rft.volume=39&rft.spage=&rft.date=2020 Tectonics 39 4 28 https://doi.org/10.1029/2018TC005461 URN:NBN:no-85939 Fulltext https://www.duo.uio.no/bitstream/handle/10852/83184/5/2018TC005461.pdf 0278-7407 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.1029/2018TC005461 2021-02-17T23:30:58Z Cooling fracture orientations in diabase sills associated with the Cretaceous High Arctic Large Igneous Province and syn‐sedimentary Triassic faults help constrain a model for Svalbard's (NE Barents Shelf) Mesozoic stress field evolution. Fracture data from Edgeøya and adjacent islands in SE Svalbard, from S Spitsbergen, and from literature were used to model preferred orientations and temporal relationships. Orthogonal, roughly E‐W and N‐S, joints and veins in sills from SE Svalbard are interpreted as cooling fractures influenced by the ambient stress field. Aligned preferred orientations within the Triassic host strata are associated with a regional Cretaceous jointing episode driven by sill emplacement and/or erosional unloading. The regional maximum horizontal stress (likely σ1) is inferred to have been parallel to a dominant ≈E‐W set. Spitsbergen's more complex joint patterns are associated with proximity to the Cenozoic West Spitsbergen Fold‐and‐Thrust Belt, but ≈E‐W and ≈N‐S orientations occur and are typically the earlier set. Syn‐sedimentary, ≈NW‐SE striking, Triassic normal faults in SE Svalbard aligned with the maximum horizontal stress indicate a Triassic to Cretaceous counterclockwise stress field shift, with additional counterclockwise shifting during Cenozoic dextral transpression between Svalbard and Greenland. Localized joint preferred orientations consistent with both decoupled and coupled transpression occur. Changes in the regional maximum horizontal stress and deformation regime may reflect timing of which plate margin was crucial in influencing Svalbard's plate interior stress field, starting with Triassic Uralian activity to the E, then Cretaceous Amerasian Basin development to the NW, culminating with Cenozoic dextral transpression and transtension to the SW. Article in Journal/Newspaper Arctic Edgeøya Greenland Svalbard Spitsbergen Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Edgeøya ENVELOPE(22.500,22.500,77.750,77.750) Greenland Svalbard Tectonics 39 4 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Cooling fracture orientations in diabase sills associated with the Cretaceous High Arctic Large Igneous Province and syn‐sedimentary Triassic faults help constrain a model for Svalbard's (NE Barents Shelf) Mesozoic stress field evolution. Fracture data from Edgeøya and adjacent islands in SE Svalbard, from S Spitsbergen, and from literature were used to model preferred orientations and temporal relationships. Orthogonal, roughly E‐W and N‐S, joints and veins in sills from SE Svalbard are interpreted as cooling fractures influenced by the ambient stress field. Aligned preferred orientations within the Triassic host strata are associated with a regional Cretaceous jointing episode driven by sill emplacement and/or erosional unloading. The regional maximum horizontal stress (likely σ1) is inferred to have been parallel to a dominant ≈E‐W set. Spitsbergen's more complex joint patterns are associated with proximity to the Cenozoic West Spitsbergen Fold‐and‐Thrust Belt, but ≈E‐W and ≈N‐S orientations occur and are typically the earlier set. Syn‐sedimentary, ≈NW‐SE striking, Triassic normal faults in SE Svalbard aligned with the maximum horizontal stress indicate a Triassic to Cretaceous counterclockwise stress field shift, with additional counterclockwise shifting during Cenozoic dextral transpression between Svalbard and Greenland. Localized joint preferred orientations consistent with both decoupled and coupled transpression occur. Changes in the regional maximum horizontal stress and deformation regime may reflect timing of which plate margin was crucial in influencing Svalbard's plate interior stress field, starting with Triassic Uralian activity to the E, then Cretaceous Amerasian Basin development to the NW, culminating with Cenozoic dextral transpression and transtension to the SW. |
format |
Article in Journal/Newspaper |
author |
Maher, Harmon Senger, Kim Braathen, Alvar Mulrooney, Mark Joseph Smyrak-Sikora, Aleksandra Osmundsen, Per Terje Ogata, Kei |
spellingShingle |
Maher, Harmon Senger, Kim Braathen, Alvar Mulrooney, Mark Joseph Smyrak-Sikora, Aleksandra Osmundsen, Per Terje Ogata, Kei Mesozoic-Cenozoic regional stress field evolution in Svalbard |
author_facet |
Maher, Harmon Senger, Kim Braathen, Alvar Mulrooney, Mark Joseph Smyrak-Sikora, Aleksandra Osmundsen, Per Terje Ogata, Kei |
author_sort |
Maher, Harmon |
title |
Mesozoic-Cenozoic regional stress field evolution in Svalbard |
title_short |
Mesozoic-Cenozoic regional stress field evolution in Svalbard |
title_full |
Mesozoic-Cenozoic regional stress field evolution in Svalbard |
title_fullStr |
Mesozoic-Cenozoic regional stress field evolution in Svalbard |
title_full_unstemmed |
Mesozoic-Cenozoic regional stress field evolution in Svalbard |
title_sort |
mesozoic-cenozoic regional stress field evolution in svalbard |
publishDate |
2020 |
url |
http://hdl.handle.net/10852/83184 http://urn.nb.no/URN:NBN:no-85939 https://doi.org/10.1029/2018TC005461 |
long_lat |
ENVELOPE(22.500,22.500,77.750,77.750) |
geographic |
Arctic Edgeøya Greenland Svalbard |
geographic_facet |
Arctic Edgeøya Greenland Svalbard |
genre |
Arctic Edgeøya Greenland Svalbard Spitsbergen |
genre_facet |
Arctic Edgeøya Greenland Svalbard Spitsbergen |
op_source |
0278-7407 |
op_relation |
NFR/295208 http://urn.nb.no/URN:NBN:no-85939 Maher, Harmon Senger, Kim Braathen, Alvar Mulrooney, Mark Joseph Smyrak-Sikora, Aleksandra Osmundsen, Per Terje Ogata, Kei . Mesozoic-Cenozoic regional stress field evolution in Svalbard. Tectonics. 2020, 39(4) http://hdl.handle.net/10852/83184 1836153 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonics&rft.volume=39&rft.spage=&rft.date=2020 Tectonics 39 4 28 https://doi.org/10.1029/2018TC005461 URN:NBN:no-85939 Fulltext https://www.duo.uio.no/bitstream/handle/10852/83184/5/2018TC005461.pdf |
op_doi |
https://doi.org/10.1029/2018TC005461 |
container_title |
Tectonics |
container_volume |
39 |
container_issue |
4 |
_version_ |
1766342267537195008 |