Paleointensity study of late Miocene igneous rocks from British Columbia, Canada
Sixty-nine specimens representing 49 late Miocene (10–15 m.y. ago) basaltic lava flows and 4 associated gabbroic intrusive plugs were studied in an attempt to estimate the paleointensity of the earth's magnetic field in south-central British Columbia. The paleointensity determination was based...
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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/e70-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-013 |
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crcansciencepubl:10.1139/e70-013 2023-12-17T10:32:11+01:00 Paleointensity study of late Miocene igneous rocks from British Columbia, Canada Symons, D. T. A. Schwarz, E. J. 1970 http://dx.doi.org/10.1139/e70-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-013 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 7, issue 1, page 176-181 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1970 crcansciencepubl https://doi.org/10.1139/e70-013 2023-11-19T13:39:09Z Sixty-nine specimens representing 49 late Miocene (10–15 m.y. ago) basaltic lava flows and 4 associated gabbroic intrusive plugs were studied in an attempt to estimate the paleointensity of the earth's magnetic field in south-central British Columbia. The paleointensity determination was based on the comparison of the decay of natural remanent magnetism intensity with that of an artificial thermoremanent magnetism (H = 0.35 Oe) in progressively higher alternating demagnetizing fields (peak: 800 Oe). Only 22 of the 69 specimens were considered to yield reliable paleointensity determinations which give an estimated average equatorial intensity for the late Miocene earth's field of 0.18 Oe ± 0.11. This result agrees reasonably well with those from contemporaneous rocks from North America, Japan, and Iceland. Several low determinations with consistent, normal, or reversed remanence directions suggest that the intensity of the non-dipole components of the late Miocene earth's field must have been very small in the sampled area. Article in Journal/Newspaper Iceland Canadian Science Publishing (via Crossref) Canada British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Fields Peak ENVELOPE(-135.933,-135.933,-75.983,-75.983) Canadian Journal of Earth Sciences 7 1 176 181 |
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 Symons, D. T. A. Schwarz, E. J. Paleointensity study of late Miocene igneous rocks from British Columbia, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Sixty-nine specimens representing 49 late Miocene (10–15 m.y. ago) basaltic lava flows and 4 associated gabbroic intrusive plugs were studied in an attempt to estimate the paleointensity of the earth's magnetic field in south-central British Columbia. The paleointensity determination was based on the comparison of the decay of natural remanent magnetism intensity with that of an artificial thermoremanent magnetism (H = 0.35 Oe) in progressively higher alternating demagnetizing fields (peak: 800 Oe). Only 22 of the 69 specimens were considered to yield reliable paleointensity determinations which give an estimated average equatorial intensity for the late Miocene earth's field of 0.18 Oe ± 0.11. This result agrees reasonably well with those from contemporaneous rocks from North America, Japan, and Iceland. Several low determinations with consistent, normal, or reversed remanence directions suggest that the intensity of the non-dipole components of the late Miocene earth's field must have been very small in the sampled area. |
format |
Article in Journal/Newspaper |
author |
Symons, D. T. A. Schwarz, E. J. |
author_facet |
Symons, D. T. A. Schwarz, E. J. |
author_sort |
Symons, D. T. A. |
title |
Paleointensity study of late Miocene igneous rocks from British Columbia, Canada |
title_short |
Paleointensity study of late Miocene igneous rocks from British Columbia, Canada |
title_full |
Paleointensity study of late Miocene igneous rocks from British Columbia, Canada |
title_fullStr |
Paleointensity study of late Miocene igneous rocks from British Columbia, Canada |
title_full_unstemmed |
Paleointensity study of late Miocene igneous rocks from British Columbia, Canada |
title_sort |
paleointensity study of late miocene igneous rocks from british columbia, canada |
publisher |
Canadian Science Publishing |
publishDate |
1970 |
url |
http://dx.doi.org/10.1139/e70-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-013 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-135.933,-135.933,-75.983,-75.983) |
geographic |
Canada British Columbia Fields Peak |
geographic_facet |
Canada British Columbia Fields Peak |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Canadian Journal of Earth Sciences volume 7, issue 1, page 176-181 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e70-013 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
7 |
container_issue |
1 |
container_start_page |
176 |
op_container_end_page |
181 |
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1785585720571723776 |