The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia
The Rodinia supercontinent broke apart during the Neoproterozoic. Rodinia breakup is associated with widespread intraplate magmatism on many cratons, including the ca. 720-719 Ma Franklin large igneous province (LIP) of Laurentia. Coeval magmatism has also been identified recently in Siberia and Sou...
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Geological Society Of London Publications
2023
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| Online Access: | https://cris.library.msu.ac.zw//handle/11408/5560 https://doi.org/10.1144/SP537-2022-206 |
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| author | Antony Mamuse Ashley P. Gumsley Michiel de Kock Richard Ernst Anna Gumsley Richard Hanson Sandra Kamo Michael Knoper Marek Lewandowski Bartłomiej Luks Ulf Söderlund |
| author2 | Faculty of Engineering and Geosciences, Midlands State University, Zvishavane, 9005, Zimbabwe |
| author_facet | Faculty of Engineering and Geosciences, Midlands State University, Zvishavane, 9005, Zimbabwe Antony Mamuse Ashley P. Gumsley Michiel de Kock Richard Ernst Anna Gumsley Richard Hanson Sandra Kamo Michael Knoper Marek Lewandowski Bartłomiej Luks Ulf Söderlund |
| author_sort | Antony Mamuse |
| collection | DSpace |
| description | The Rodinia supercontinent broke apart during the Neoproterozoic. Rodinia breakup is associated with widespread intraplate magmatism on many cratons, including the ca. 720-719 Ma Franklin large igneous province (LIP) of Laurentia. Coeval magmatism has also been identified recently in Siberia and South China. This extensive magmatism terminates ⁓1 Myr before the onset of the Sturtian Snowball Earth. However, LIP-scale magmatism and global glaciation are likely related. U-Pb ID-TIMS baddeleyite dating herein identifies remnants of a new ca. 724-712 Ma LIP on the eastern Kalahari Craton in southern Africa and East Antarctica: the combined Mutare-Fingeren Dyke Swarm. This dyke swarm occurs in north-eastern Zimbabwe (Mutare Dyke Swarm) and western Dronning Maud Land (Fingeren Dyke Swarm). It has EMORB-like geochemistry, suggesting an asthenosphere mantle source for the LIP. The Mutare-Fingeren LIP likely formed during rifting. This rifting would have occurred almost ⁓100 Myrs earlier than previous estimates in eastern Kalahari. The placement of Kalahari against south-eastern Laurentia in Rodinia is also questioned. Proposed alternatives, invoking linking terranes between Kalahari and south-western Laurentia or close to north-western Laurentia, as alternative scenarios, also present challenges with no discernible resolution. Nevertheless, LIP-scale magmatism being responsible for the Sturtian Snowball Earth significantly increases. |
| format | research article |
| id | ir-11408-5560 |
| institution | My University |
| language | English |
| publishDate | 2023 |
| publisher | Geological Society Of London Publications |
| record_format | dspace |
| spelling | ir-11408-55602023-04-27T13:08:51Z The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia Antony Mamuse Ashley P. Gumsley Michiel de Kock Richard Ernst Anna Gumsley Richard Hanson Sandra Kamo Michael Knoper Marek Lewandowski Bartłomiej Luks Ulf Söderlund Faculty of Engineering and Geosciences, Midlands State University, Zvishavane, 9005, Zimbabwe Institute of Earth Sciences, University of Silesia in Katowice, 41-205, Sosnowiec, Poland Department of Geology, University of Johannesburg, Johannesburg, 2006, South Africa Department of Earth Sciences, Carleton University, Ottawa, ON K1S 5B6, Canada Institute of Geological Sciences, Polish Academy of Sciences, Krakow, 31-002, Poland Department of Geological Sciences, Texas Christian University, Fort Worth, 76109, USA Department of Earth Sciences, University of Toronto, Toronto, ON M5S 3B1, Canada Department of Geology, University of Johannesburg, Johannesburg, 2006, South Africa Institute of Geophysics. Polish Academy of Sciences, Warsaw, 01-452, Poland Institute of Geophysics, Polish Academy of Sciences, Warsaw, 01-452, Poland Department of Geology, Lund University, Lund, 223 62, Sweden Fingeren Dyke Swarm enigma supercontinent Rodinia Mutare The Rodinia supercontinent broke apart during the Neoproterozoic. Rodinia breakup is associated with widespread intraplate magmatism on many cratons, including the ca. 720-719 Ma Franklin large igneous province (LIP) of Laurentia. Coeval magmatism has also been identified recently in Siberia and South China. This extensive magmatism terminates ⁓1 Myr before the onset of the Sturtian Snowball Earth. However, LIP-scale magmatism and global glaciation are likely related. U-Pb ID-TIMS baddeleyite dating herein identifies remnants of a new ca. 724-712 Ma LIP on the eastern Kalahari Craton in southern Africa and East Antarctica: the combined Mutare-Fingeren Dyke Swarm. This dyke swarm occurs in north-eastern Zimbabwe (Mutare Dyke Swarm) and western Dronning Maud Land (Fingeren Dyke Swarm). It has EMORB-like geochemistry, suggesting an asthenosphere mantle source for the LIP. The Mutare-Fingeren LIP likely formed during rifting. This rifting would have occurred almost ⁓100 Myrs earlier than previous estimates in eastern Kalahari. The placement of Kalahari against south-eastern Laurentia in Rodinia is also questioned. Proposed alternatives, invoking linking terranes between Kalahari and south-western Laurentia or close to north-western Laurentia, as alternative scenarios, also present challenges with no discernible resolution. Nevertheless, LIP-scale magmatism being responsible for the Sturtian Snowball Earth significantly increases. 537 1 60 2023-04-27T13:08:51Z 2023-04-27T13:08:51Z 2023-02-10 research article https://cris.library.msu.ac.zw//handle/11408/5560 https://doi.org/10.1144/SP537-2022-206 en #PLACEHOLDER_PARENT_METADATA_VALUE# (SONATINA 3 grant no. UMO- 2019/32/C/ST10/00238). Geological Society 0016-7649 #PLACEHOLDER_PARENT_METADATA_VALUE# open Geological Society Of London Publications |
| spellingShingle | Fingeren Dyke Swarm enigma supercontinent Rodinia Mutare Antony Mamuse Ashley P. Gumsley Michiel de Kock Richard Ernst Anna Gumsley Richard Hanson Sandra Kamo Michael Knoper Marek Lewandowski Bartłomiej Luks Ulf Söderlund The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia |
| title | The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia |
| title_full | The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia |
| title_fullStr | The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia |
| title_full_unstemmed | The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia |
| title_short | The Mutare-Fingeren Dyke Swarm: the enigma of the Kalahari Craton's exit from supercontinent Rodinia |
| title_sort | mutare-fingeren dyke swarm: the enigma of the kalahari craton's exit from supercontinent rodinia |
| topic | Fingeren Dyke Swarm enigma supercontinent Rodinia Mutare |
| url | https://cris.library.msu.ac.zw//handle/11408/5560 https://doi.org/10.1144/SP537-2022-206 |
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