U.Pb-40Ar/39r Coupling Approach for the Reconstruction of Paleo-River Systems: A Case Study of the Siluro-Devonian Old Red Sandstone

Lead PI: Prof. Nicholas Christie-Blick

Unit Affiliation: Seismology, Geology and Tectonophysics, Lamont-Doherty Earth Observatory (LDEO)

July 2015 - August 2018
Project Type: Research

DESCRIPTION: Research under way in the Silurian- to Devonian-aged Old Red Sandstone of Scotland and potential source terranes in the Caledonide orogen (mountain belt) of Scotland, Norway and Greenland aims to test the idea that the sediments may have been derived from far afield, and transported to their present outcrop locations via major river systems akin to the Indus and Ganges of the modern day Himalayan orogen. Our strategy involves a combination of detrital zircon U/Pb and white mica 40Ar/39Ar geochronology, and geochemical analysis of rutile, garnet and mica aimed at elucidating the P-T-t (pressure-temperature-time) evolution of the source terranes.