| | |
Summary: Cretaceous deformation, Chegitun River area, Chukotka
Peninsula, Russia: Implications for the tectonic evolution of the
Bering Strait region
Jaime Toro
Department of Geology and Geography, West Virginia University, Morgantown, West Virginia, USA
Jeffrey M. Amato
Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico, USA
Boris Natal'in
Istanbul Technical University, Istanbul, Turkey
Received 9 October 2001; revised 1 August 2002; accepted 19 September 2002; published 30 May 2003.
[1] The Koolen metamorphic dome of Chukotka
Peninsula has been interpreted as a mid-Cretaceous
extensional core complex. On the NW flank of the
dome, three lithotectonic units are exposed: (1) High-
Grade unit, composed of sillimanite-grade rocks; (2)
Tanatap unit, composed of polydeformed greenschist-
grade phyllites and marbles; (3) Chegitun unit
composed of unmetamorphosed early Paleozoic
limestones. Four Early Cretaceous to Tertiary
deformational events are documented. D1 is attributed
|
