The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration
Coupled paleomagnetic and geochronologic data derived from mafic dykes provide valuable records of continental movement. To reconstruct the Proterozoic paleogeographic history of Peninsular India, we report paleomagnetic directions and U-Pb zircon ages from twenty-nine mafic dykes in the Eastern Dha...
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ftdoajarticles:oai:doaj.org/article:056d6ebb5d9e46408fc6677915d56d73 2023-07-02T03:32:18+02:00 The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration Scott R. Miller Joseph G. Meert Anthony F. Pivarunas Anup K. Sinha Manoj K. Pandit Paul A. Mueller George D. Kamenov 2023-07-01T00:00:00Z https://doi.org/10.1016/j.gsf.2023.101581 https://doaj.org/article/056d6ebb5d9e46408fc6677915d56d73 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S1674987123000488 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2023.101581 https://doaj.org/article/056d6ebb5d9e46408fc6677915d56d73 Geoscience Frontiers, Vol 14, Iss 4, Pp 101581- (2023) Dharwar India Rodinia U-Pb Paleogeography Grenville Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.1016/j.gsf.2023.101581 2023-06-11T00:36:05Z Coupled paleomagnetic and geochronologic data derived from mafic dykes provide valuable records of continental movement. To reconstruct the Proterozoic paleogeographic history of Peninsular India, we report paleomagnetic directions and U-Pb zircon ages from twenty-nine mafic dykes in the Eastern Dharwar Craton near Hyderabad. Paleomagnetic analysis yielded clusters of directional data that correspond to dyke swarms at 2.37 Ga, 2.22 Ga, 2.08 Ga, 1.89–1.86 Ga, 1.79 Ga, and a previously undated dual polarity magnetization. We report new positive baked contact tests for the 2.08 Ga swarm and the 1.89–1.86 Ga swarm(s), and a new inverse baked contact test for the 2.08 Ga swarm. Our results promote the 2.08 Ga Dharwar Craton paleomagnetic pole (43.1° N, 184.5° E; A95 = 4.3°) to a reliability score of R = 7 and suggest a position for the Dharwar Craton at 1.79 Ga based on a virtual geomagnetic pole (VGP) at 33.0° N, 347.5° E (a95 = 16.9°, k = 221, N = 2). The new VGP for the Dharwar Craton provides support for the union of the Dharwar, Singhbhum, and Bastar Cratons in the Southern India Block by at least 1.79 Ga. Combined new and published northeast-southwest moderate-steep dual polarity directions from Dharwar Craton dykes define a new paleomagnetic pole at 20.6° N, 233.1° E (A95 = 9.2°, N = 18; R = 5). Two dykes from this group yielded 1.05–1.01 Ga 207Pb/206Pb zircon ages and this range is taken as the age of the new paleomagnetic pole. A comparison of the previously published poles with our new 1.05–1.01 Ga pole shows India shifting from equatorial to higher (southerly) latitudes from 1.08 Ga to 1.01 Ga as a component of Rodinia. Article in Journal/Newspaper Geomagnetic Pole Directory of Open Access Journals: DOAJ Articles Geoscience Frontiers 14 4 101581 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Dharwar India Rodinia U-Pb Paleogeography Grenville Geology QE1-996.5 |
spellingShingle |
Dharwar India Rodinia U-Pb Paleogeography Grenville Geology QE1-996.5 Scott R. Miller Joseph G. Meert Anthony F. Pivarunas Anup K. Sinha Manoj K. Pandit Paul A. Mueller George D. Kamenov The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration |
topic_facet |
Dharwar India Rodinia U-Pb Paleogeography Grenville Geology QE1-996.5 |
description |
Coupled paleomagnetic and geochronologic data derived from mafic dykes provide valuable records of continental movement. To reconstruct the Proterozoic paleogeographic history of Peninsular India, we report paleomagnetic directions and U-Pb zircon ages from twenty-nine mafic dykes in the Eastern Dharwar Craton near Hyderabad. Paleomagnetic analysis yielded clusters of directional data that correspond to dyke swarms at 2.37 Ga, 2.22 Ga, 2.08 Ga, 1.89–1.86 Ga, 1.79 Ga, and a previously undated dual polarity magnetization. We report new positive baked contact tests for the 2.08 Ga swarm and the 1.89–1.86 Ga swarm(s), and a new inverse baked contact test for the 2.08 Ga swarm. Our results promote the 2.08 Ga Dharwar Craton paleomagnetic pole (43.1° N, 184.5° E; A95 = 4.3°) to a reliability score of R = 7 and suggest a position for the Dharwar Craton at 1.79 Ga based on a virtual geomagnetic pole (VGP) at 33.0° N, 347.5° E (a95 = 16.9°, k = 221, N = 2). The new VGP for the Dharwar Craton provides support for the union of the Dharwar, Singhbhum, and Bastar Cratons in the Southern India Block by at least 1.79 Ga. Combined new and published northeast-southwest moderate-steep dual polarity directions from Dharwar Craton dykes define a new paleomagnetic pole at 20.6° N, 233.1° E (A95 = 9.2°, N = 18; R = 5). Two dykes from this group yielded 1.05–1.01 Ga 207Pb/206Pb zircon ages and this range is taken as the age of the new paleomagnetic pole. A comparison of the previously published poles with our new 1.05–1.01 Ga pole shows India shifting from equatorial to higher (southerly) latitudes from 1.08 Ga to 1.01 Ga as a component of Rodinia. |
format |
Article in Journal/Newspaper |
author |
Scott R. Miller Joseph G. Meert Anthony F. Pivarunas Anup K. Sinha Manoj K. Pandit Paul A. Mueller George D. Kamenov |
author_facet |
Scott R. Miller Joseph G. Meert Anthony F. Pivarunas Anup K. Sinha Manoj K. Pandit Paul A. Mueller George D. Kamenov |
author_sort |
Scott R. Miller |
title |
The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration |
title_short |
The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration |
title_full |
The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration |
title_fullStr |
The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration |
title_full_unstemmed |
The drift history of the Dharwar Craton and India from 2.37 Ga to 1.01 Ga with refinements for an initial Rodinia configuration |
title_sort |
drift history of the dharwar craton and india from 2.37 ga to 1.01 ga with refinements for an initial rodinia configuration |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.gsf.2023.101581 https://doaj.org/article/056d6ebb5d9e46408fc6677915d56d73 |
genre |
Geomagnetic Pole |
genre_facet |
Geomagnetic Pole |
op_source |
Geoscience Frontiers, Vol 14, Iss 4, Pp 101581- (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674987123000488 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2023.101581 https://doaj.org/article/056d6ebb5d9e46408fc6677915d56d73 |
op_doi |
https://doi.org/10.1016/j.gsf.2023.101581 |
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Geoscience Frontiers |
container_volume |
14 |
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4 |
container_start_page |
101581 |
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1770271842116829184 |