Tectonic significance of Late Neoproterozoic granites from the Tibesti massif in southern Libya inferred from Sr and Nd isotopes and UPb zircon data uri icon

abstract

  • The Neoproterozoic crust of the Tibesti massif was stabilized by magmatism that included subduction-generated batholithic suites and post-orogenic granite plutons. All of the magmatism occurred in a period of about 20 million years centered around 550 Ma, and nearly all of the granites have initial 87Sr/86Sr ratios of about 0.706. The Wadi Yebigue pluton has U-Pb zircon ages of 563 Ma and 558 Ma on two different phases and Nd at 550 Ma from -0.5 to -2.2. These isotopic data and the geologic history of the massif suggest that granites in the Tibesti massif developed during and shortly after closure of a short-lived ocean basin that developed by fragmentation of pre-existing continental crust of the Saharan region. 2005 Elsevier Ltd. All rights reserved.

published proceedings

  • Journal of African Earth Sciences

altmetric score

  • 3

author list (cited authors)

  • Suayah, I. B., Miller, J. S., Miller, B. V., Bayer, T. M., & Rogers, J.

citation count

  • 27

complete list of authors

  • Suayah, Ismail B||Miller, Jonathan S||Miller, Brent V||Bayer, Tovah M||Rogers, John JW

publication date

  • January 2006