First Data on LA-ICP-MS U/Pb Zircon Geochronology of Upper Riphean Sandstones of the Bashkir Anticlinorium (South Urals)

摘要

With respect to their petrography and petro-geochemistry, Riphean sedimentary rocks of the stra-totype locality (Bashkir Anticlinorium, western South Urals) are well studied [7]. At the same time, no systemic geochronological investigations of their detrital zircons (dZr) have been carried out, although they offer the opportunity (in availability of the statistically significant selection) to derive substantiated inferences on the age of eroded rock, the relationships between local and remote sediment sources, the evolution of provenances during deposition, and other aspects. In this communication, we present the first such data on zircons from the Lemeza Subformation of the Karatavian Zil'merdak Formation, which represents a standard Upper Riphean unit of northern Eurasia.