Archean geodynamics: Ephemeral supercontinents or long-lived supercratons
Many Archean cratons exhibit Paleoproterozoic rifted margins, implying they were pieces of some ancestral landmass(es). The idea that such an ancient continental assembly represents an Archean supercontinent has been proposed but remains to be justified. Starkly contrasting geological records betwee...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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GEOLOGICAL SOC AMER, INC
2021
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| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/90596 |
| _version_ | 1848765397968355328 |
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| author | Liu, Yebo Mitchell, Ross N. Li, Zheng-Xiang Kirscher, Uwe Pisarevsky, Sergei A. Wang, Chong |
| author_facet | Liu, Yebo Mitchell, Ross N. Li, Zheng-Xiang Kirscher, Uwe Pisarevsky, Sergei A. Wang, Chong |
| author_sort | Liu, Yebo |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Many Archean cratons exhibit Paleoproterozoic rifted margins, implying they were pieces of some ancestral landmass(es). The idea that such an ancient continental assembly represents an Archean supercontinent has been proposed but remains to be justified. Starkly contrasting geological records between different clans of cratons have inspired an alternative hypothesis where cratons were clustered in multiple, separate “supercratons.” A new ca. 2.62 Ga paleomagnetic pole from the Yilgarn craton of Australia is compatible with either two successive but ephemeral supercontinents or two long-lived supercratons across the Archean-Proterozoic transition. Neither interpretation supports the existence of a single, long-lived supercontinent, suggesting that Archean geodynamics were fundamentally different from subsequent times (Proterozoic to present), which were influenced largely by supercontinent cycles. |
| first_indexed | 2025-11-14T11:34:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-90596 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:34:37Z |
| publishDate | 2021 |
| publisher | GEOLOGICAL SOC AMER, INC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-905962023-03-27T01:21:26Z Archean geodynamics: Ephemeral supercontinents or long-lived supercratons Liu, Yebo Mitchell, Ross N. Li, Zheng-Xiang Kirscher, Uwe Pisarevsky, Sergei A. Wang, Chong Science & Technology Physical Sciences Geology 2 NEOARCHEAN SUPERCONTINENTS LOW-LATITUDE GLACIATION TRUE POLAR WANDER WESTERN-AUSTRALIA DYKE SWARMS PLATE-TECTONICS PALEOMAGNETISM GA EVOLUTION LAURENTIA Many Archean cratons exhibit Paleoproterozoic rifted margins, implying they were pieces of some ancestral landmass(es). The idea that such an ancient continental assembly represents an Archean supercontinent has been proposed but remains to be justified. Starkly contrasting geological records between different clans of cratons have inspired an alternative hypothesis where cratons were clustered in multiple, separate “supercratons.” A new ca. 2.62 Ga paleomagnetic pole from the Yilgarn craton of Australia is compatible with either two successive but ephemeral supercontinents or two long-lived supercratons across the Archean-Proterozoic transition. Neither interpretation supports the existence of a single, long-lived supercontinent, suggesting that Archean geodynamics were fundamentally different from subsequent times (Proterozoic to present), which were influenced largely by supercontinent cycles. 2021 Journal Article http://hdl.handle.net/20.500.11937/90596 10.1130/G48575.1 English http://purl.org/au-research/grants/arc/FL150100133 http://creativecommons.org/licenses/by/4.0/ GEOLOGICAL SOC AMER, INC fulltext |
| spellingShingle | Science & Technology Physical Sciences Geology 2 NEOARCHEAN SUPERCONTINENTS LOW-LATITUDE GLACIATION TRUE POLAR WANDER WESTERN-AUSTRALIA DYKE SWARMS PLATE-TECTONICS PALEOMAGNETISM GA EVOLUTION LAURENTIA Liu, Yebo Mitchell, Ross N. Li, Zheng-Xiang Kirscher, Uwe Pisarevsky, Sergei A. Wang, Chong Archean geodynamics: Ephemeral supercontinents or long-lived supercratons |
| title | Archean geodynamics: Ephemeral supercontinents or long-lived supercratons |
| title_full | Archean geodynamics: Ephemeral supercontinents or long-lived supercratons |
| title_fullStr | Archean geodynamics: Ephemeral supercontinents or long-lived supercratons |
| title_full_unstemmed | Archean geodynamics: Ephemeral supercontinents or long-lived supercratons |
| title_short | Archean geodynamics: Ephemeral supercontinents or long-lived supercratons |
| title_sort | archean geodynamics: ephemeral supercontinents or long-lived supercratons |
| topic | Science & Technology Physical Sciences Geology 2 NEOARCHEAN SUPERCONTINENTS LOW-LATITUDE GLACIATION TRUE POLAR WANDER WESTERN-AUSTRALIA DYKE SWARMS PLATE-TECTONICS PALEOMAGNETISM GA EVOLUTION LAURENTIA |
| url | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/90596 |