Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna
Laurentia, the core of Paleo- to Mesoproterozoic supercontinent Nuna, has remained largely intact since assembly 2.0 to 1.8 billion years ago [Ga]. For earlier times, previous paleomagnetic data on poorly dated Paleoproterozoic mafic intrusions yielded ambiguous estimates of the amount of separation...
Published in: | American Journal of Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Journal of Science
2014
|
Subjects: | |
Online Access: | https://doi.org/10.2475/04.2014.03 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:p7d3b-cw870 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:p7d3b-cw870 2024-10-13T14:11:20+00:00 Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna Mitchell, Ross N. Bleeker, Wouter van Breemen, Otto Lecheminant, Tony N. Peng, Peng Nilsson, Mimmi K. M. Evans, David A. D. 2014-04 https://doi.org/10.2475/04.2014.03 unknown American Journal of Science https://doi.org/10.2475/04.2014.03 eprintid:53054 info:eu-repo/semantics/closedAccess Other American Journal of Science, 314(4), 878-894, (2014-04) Slave craton Superior craton Laurentia U-Pb geochronology paleomagnetism plate tectonics info:eu-repo/semantics/article 2014 ftcaltechauth https://doi.org/10.2475/04.2014.03 2024-09-25T18:46:41Z Laurentia, the core of Paleo- to Mesoproterozoic supercontinent Nuna, has remained largely intact since assembly 2.0 to 1.8 billion years ago [Ga]. For earlier times, previous paleomagnetic data on poorly dated Paleoproterozoic mafic intrusions yielded ambiguous estimates of the amount of separation between key cratons within Nuna such as the Slave and Superior. Recent developments in paleomagnetism and U-Pb baddeleyite geochronology, including new results reported herein, yield sufficiently precise data to generate partial apparent polar wander paths for both the Slave and Superior craton from 2.2 to 2.0 Ga. Our new apparent polar wander comparison confirms earlier speculations that processes similar to plate tectonics, with relative motion between the Slave and Superior cratons, were operative leading up to the final assembly of supercontinent Nuna. © 2014 American Journal of Science. This research was supported by the Geological Survey of Canada and a NSF Graduate Research Fellowship granted to Mitchell. Ken Buchan assisted with collection of paleomagnetic samples around Yellowknife. The paper benefited from reviews by Paul Hoffman, Ted Irving, and Rob van der Voo, informal reviews by Richard Hanson and Lauri Pesonen, and discussions with Richard Ernst, Paul Hoffman, Taylor Kilian, and Luke Ootes. Article in Journal/Newspaper Yellowknife Caltech Authors (California Institute of Technology) Yellowknife Canada Luke ENVELOPE(-94.855,-94.855,56.296,56.296) Buchan ENVELOPE(-44.700,-44.700,-60.766,-60.766) Lauri ENVELOPE(24.087,24.087,65.951,65.951) American Journal of Science 314 4 878 894 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
Slave craton Superior craton Laurentia U-Pb geochronology paleomagnetism plate tectonics |
spellingShingle |
Slave craton Superior craton Laurentia U-Pb geochronology paleomagnetism plate tectonics Mitchell, Ross N. Bleeker, Wouter van Breemen, Otto Lecheminant, Tony N. Peng, Peng Nilsson, Mimmi K. M. Evans, David A. D. Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna |
topic_facet |
Slave craton Superior craton Laurentia U-Pb geochronology paleomagnetism plate tectonics |
description |
Laurentia, the core of Paleo- to Mesoproterozoic supercontinent Nuna, has remained largely intact since assembly 2.0 to 1.8 billion years ago [Ga]. For earlier times, previous paleomagnetic data on poorly dated Paleoproterozoic mafic intrusions yielded ambiguous estimates of the amount of separation between key cratons within Nuna such as the Slave and Superior. Recent developments in paleomagnetism and U-Pb baddeleyite geochronology, including new results reported herein, yield sufficiently precise data to generate partial apparent polar wander paths for both the Slave and Superior craton from 2.2 to 2.0 Ga. Our new apparent polar wander comparison confirms earlier speculations that processes similar to plate tectonics, with relative motion between the Slave and Superior cratons, were operative leading up to the final assembly of supercontinent Nuna. © 2014 American Journal of Science. This research was supported by the Geological Survey of Canada and a NSF Graduate Research Fellowship granted to Mitchell. Ken Buchan assisted with collection of paleomagnetic samples around Yellowknife. The paper benefited from reviews by Paul Hoffman, Ted Irving, and Rob van der Voo, informal reviews by Richard Hanson and Lauri Pesonen, and discussions with Richard Ernst, Paul Hoffman, Taylor Kilian, and Luke Ootes. |
format |
Article in Journal/Newspaper |
author |
Mitchell, Ross N. Bleeker, Wouter van Breemen, Otto Lecheminant, Tony N. Peng, Peng Nilsson, Mimmi K. M. Evans, David A. D. |
author_facet |
Mitchell, Ross N. Bleeker, Wouter van Breemen, Otto Lecheminant, Tony N. Peng, Peng Nilsson, Mimmi K. M. Evans, David A. D. |
author_sort |
Mitchell, Ross N. |
title |
Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna |
title_short |
Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna |
title_full |
Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna |
title_fullStr |
Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna |
title_full_unstemmed |
Plate tectonics before 2.0 Ga: Evidence from paleomagnetism of cratons within supercontinent Nuna |
title_sort |
plate tectonics before 2.0 ga: evidence from paleomagnetism of cratons within supercontinent nuna |
publisher |
American Journal of Science |
publishDate |
2014 |
url |
https://doi.org/10.2475/04.2014.03 |
long_lat |
ENVELOPE(-94.855,-94.855,56.296,56.296) ENVELOPE(-44.700,-44.700,-60.766,-60.766) ENVELOPE(24.087,24.087,65.951,65.951) |
geographic |
Yellowknife Canada Luke Buchan Lauri |
geographic_facet |
Yellowknife Canada Luke Buchan Lauri |
genre |
Yellowknife |
genre_facet |
Yellowknife |
op_source |
American Journal of Science, 314(4), 878-894, (2014-04) |
op_relation |
https://doi.org/10.2475/04.2014.03 eprintid:53054 |
op_rights |
info:eu-repo/semantics/closedAccess Other |
op_doi |
https://doi.org/10.2475/04.2014.03 |
container_title |
American Journal of Science |
container_volume |
314 |
container_issue |
4 |
container_start_page |
878 |
op_container_end_page |
894 |
_version_ |
1812819022534672384 |