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https://hdl.handle.net/2440/124804
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Type: | Journal article |
Title: | Isotopic systematics of zircon indicate an African affinity for the rocks of southernmost India |
Author: | Clark, C. Collins, A.S. Taylor, R.J.M. Hand, M. |
Citation: | Scientific Reports, 2020; 10(1):5421-5421 |
Publisher: | Nature Publishing Group |
Issue Date: | 2020 |
ISSN: | 2045-2322 2045-2322 |
Statement of Responsibility: | Chris Clark, Alan S. Collins, Richard J. M. Taylor and Martin Hand |
Abstract: | Southern India lies in an area of Gondwana where multiple blocks are juxtaposed along Moho-penetrating structures, the significance of which are not well understood. Adequate geochronological data that can be used to differentiate the various blocks are also lacking. We present a newly acquired SIMS U-Pb, Lu-Hf, O isotopic and trace element geochemical dataset from zircon and garnet from the protoliths of the Nagercoil Block at the very tip of southern India. The data indicate that the magmatic protoliths of the rocks in this block formed at c. 2040 Ma with Lu-Hf, O-isotope and trace element data consistent with formation in a magmatic arc environment. The zircon data from Nagercoil Block are isotopically and temporally distinct from those in all the other blocks in southern India, but remarkably correspond to rocks in East Africa that are exposed on the southern margin of the Tanzania-Bangweulu Block. The new data suggest that the tip of southern India has an African affinity and a major suture zone must lie along its northern margin. All of these blocks were finally brought together during the Ediacaran-Cambrian amalgamation of Gondwana where they underwent high to ultrahigh temperature metamorphism. |
Rights: | © Te Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
DOI: | 10.1038/s41598-020-62075-y |
Grant ID: | http://purl.org/au-research/grants/arc/DE1201030 http://purl.org/au-research/grants/arc/DP150102773 http://purl.org/au-research/grants/arc/FT120100340 |
Published version: | http://dx.doi.org/10.1038/s41598-020-62075-y |
Appears in Collections: | Aurora harvest 8 Geology & Geophysics publications |
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