出版社：geodynamics Research International Bulletin Online
摘要：The Sistan suture zone (Eastern Iran) belongs to the Tethian suture, which was formed during the Early Cretaceous to Paleogene. This suture zone is divided into two tectono-sedimentary provinces (Gazik and Sahlabad) that reflect different paleo-geographic domains. The zone was created as a marginal basin, which opened prior to the Early Aptian between the Lut block and Afghan margin as a consequence of northeastward subduction of the Neo-Tethys Ocean. The active margin accretionary facies accumulated in the eastern region of this suture (Gazik Province) during the Late Cretaceous (pre-Maastrichtian), whereas passive margin facies and deep basin facies were deposited in western region (Sahlabad Province) at this time. This narrow oceanic domain was closed in three steps with an east to west progradation, in the Maastrichtian to Late Eocene. This interpretation results from new microbio-stratigraphic data from the accretionary facies and Ophiolitic mélanges emplaced in this narrow mobile belt.
