DETRITAL-ZIRCON U-PB PALEODRAINAGE RECONSTRUCTION AND GEOCHRONOLOGY OF THE CAMPANIAN BLACKHAWK-CASTLEGATE SUCCESSION, WASATCH PLATEAU AND BOOK CLIFFS, UTAH, USA

摘要

The Campanian Blackhawk Formation and Castlegate Sandstone are widely exposed along the Wasatch Plateau and Book Cliffs in east-central Utah, USA, and represent alluvial-deltaic and shoreline deposits in the Sevier foreland basin along the western margins of the Western Interior Seaway. This study presents detrital-zircon U-Pb ages (DZ U-Pb) from 31 samples in the Blackhawk-Castlegate succession so as to examine paleodrainage areas and sediment routing, the influence of autogenic processes on the stratigraphic record, and the timing of deposition.