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...

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Bibliographic Details
Published in:Comptes Rendus Geoscience
Main Authors: Hossain, Ismail, Tsunogae, Toshiaki, Rajesh, Hariharan M., Chen, Bin, Arakawa, Yoji
Other Authors: Hossain, I (reprint author), Univ Tsukuba, Grad Sch Life & Environm Sci Earth Evolut Sci, Tsukuba, Ibaraki 3058572, Japan., Univ Tsukuba, Grad Sch Life & Environm Sci Earth Evolut Sci, Tsukuba, Ibaraki 3058572, Japan., Rajshahi Univ, Dept Geol & Min, Rajshahi 6205, Bangladesh., Univ Johannesburg, Dept Geol, ZA-2006 Johannesburg, South Africa., Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
Format: Journal/Newspaper
Language:English
Published: 2007
Subjects:
U-PbSHRIMP age
basement rock
Palaeoproterozoic
Bangladesh
Columbia supercontinent
INDIAN TECTONIC ZONE
NORTH CHINA CRATON
MESOPROTEROZOIC SUPERCONTINENT
ISOTOPIC EVIDENCE
SOUTH-AUSTRALIA
OROGENIC BELT
PB
GEOCHRONOLOGY
GRANULITES
ANTARCTICA
East Antarctica
Indian
Antarc*
Antarctica
Online Access:https://hdl.handle.net/20.500.11897/250705
https://doi.org/10.1016/j.crte.2007.09.014
Description
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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