Palaeoproterozoic U-Pb SHRIMP zircon age from basement rocks in Bangladesh: A possible remnant of the Columbia supercontinent

Ismail Hossain, Toshiaki Tsunogae, Hariharan M. Rajesh, Bin Chen, Yoji Arakawa

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)979-986
Number of pages8
JournalComptes Rendus - Geoscience
Volume339
Issue number16
DOIs
Publication statusPublished - Dec 1 2007

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)
  • Global and Planetary Change

Cite this