TY - JOUR
T1 - Palaeoproterozoic U-Pb SHRIMP zircon age from basement rocks in Bangladesh
T2 - A possible remnant of the Columbia supercontinent
AU - Hossain, Ismail
AU - Tsunogae, Toshiaki
AU - Rajesh, Hariharan M.
AU - Chen, Bin
AU - Arakawa, Yoji
PY - 2007/12
Y1 - 2007/12
N2 - 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 ∼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 ∼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.
AB - 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 ∼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 ∼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.
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U2 - 10.1016/j.crte.2007.09.014
DO - 10.1016/j.crte.2007.09.014
M3 - Article
AN - SCOPUS:36849018428
SN - 1631-0713
VL - 339
SP - 979
EP - 986
JO - Comptes Rendus - Geoscience
JF - Comptes Rendus - Geoscience
IS - 16
ER -