Paleomagnetism and geochronology of the Gwalior Sills, Bundelkhand craton, Northern India Block: New constraints on Greater India assembly

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dc.contributor.author Meert, Joseph G.
dc.contributor.author Miller, Scott.R.
dc.contributor.author Pivarunas, Anthony
dc.contributor.author Pandit, Manoj K.
dc.contributor.author Mueller, Paul
dc.contributor.author Sinha, Anup K.
dc.contributor.author Kamenov, George
dc.contributor.author Kwafo, Samuel
dc.contributor.author Singha, Ananya
dc.date.accessioned 2024-04-12T06:52:46Z
dc.date.available 2024-04-12T06:52:46Z
dc.date.issued 2024-01
dc.identifier.citation Gondwana Research, Volume 125, Page 29-48, DOI : 10.1016/j.gr.2023.08.004 en_US
dc.identifier.uri http://library.iigm.res.in:8080/xmlui/handle/123456789/1777
dc.description.abstract Wepresent an updated paleomagnetic pole from the Gwalior Sills in the Bundelkhand craton within the Northern India Block (NIB). Geochronological results from baddeleyite grains from one of the sills yielded an age of 1719 ± 7Mawhich together with a previously published age indicates the emplacement of sills between 1712 and 1756 Ma ( 1730 Ma). The paleomagnetic pole calculated from additional sites in this study, combined with previous studies, falls at 13.5N, 173.7E (A95 = 3.6, K = 98) indicating near equatorial latitudes for northern India. Limestone sampled a few meters above the contact with the sill exhibits similar directions consistent with having been baked by the sill. The pole does not resemble any younger poles from Peninsular India and receives a reliability score of R = 5. Dykes in the Singhbhum craton are slightly older (1765 Ma) and indicate low paleolatitudes for the Southern Indian Block (SIB). Although the Gwalior and Singhbhum poles data indicate low latitudes for both the NIB and SIB, they are statistically different and indicate that a rotation of at least 65 is required to bring the poles into accord. We propose that the NIB and SIB were in proximity but were separated by an ocean basin. We propose the name Gotosindhu (‘Ancient Sea’) for the body of water separating the NIB and SIB. We also review previous models for the assembly of the Columbia supercontinent during this time and critically examine the position of the NIB/SIB in those reconstructions. en_US
dc.language.iso en en_US
dc.subject Northern India Block en_US
dc.subject Paleomagnetism en_US
dc.subject Geochronology en_US
dc.subject Columbia en_US
dc.subject Gotosindhu en_US
dc.title Paleomagnetism and geochronology of the Gwalior Sills, Bundelkhand craton, Northern India Block: New constraints on Greater India assembly en_US
dc.type Article en_US


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