Palaeoproterozoic U-PbSHRIMP zircon age from basement rocks in Bangladesh: A possible remnant of the Columbia supercontinent
We present new U-Pb SHRIMP zircon geochronological data for basement rocks in Bangladesh, and discuss the relationship with the formation of the Columbia supercontinent. Euhedral zircons from a diorite sample yield a concordia age of 1730 +/- 11 Ma, which is interpreted as the crystallization age. T...
Published in: | Comptes Rendus Geoscience |
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Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Journal/Newspaper |
Language: | English |
Published: |
2007
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Subjects: | |
Online Access: | https://hdl.handle.net/20.500.11897/250705 https://doi.org/10.1016/j.crte.2007.09.014 |
Summary: | We present new U-Pb SHRIMP zircon geochronological data for basement rocks in Bangladesh, and discuss the relationship with the formation of the Columbia supercontinent. Euhedral zircons from a diorite sample yield a concordia age of 1730 +/- 11 Ma, which is interpreted as the crystallization age. The Palaeoproterozoic age of the examined basement rock and the common occurrences of similar similar to 1.7-Ga geologic units in the Central Indian Tectonic Zone and Meghalaya-Shillong Plateau in Indian Shield suggest their apparent continuation. This, together with the occurrence of similar similar to 1.7-Ga geologic units in the Albany-Fraser belt in Australia and East Antarctica, are used to suggest that the basement rocks in Bangladesh formed towards the final stages of the assembly of the Columbia supercontinent. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000251997800004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Geosciences, Multidisciplinary SCI(E) 10 ARTICLE 16 979-986 339 |
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