On the identification of pebble material sources of paleo-rivers

The chemical composition of chromespinelides in the Permian sandy-gravel deposits of the western slope of the Urals was investigated by microprobe analysis. The correlation of minals is used for identification of source rocks for these sediments. They were originated by the river of the Permian age, which had the north-western flow direction and were eroded of chromite-bearing massive in the South Urals. Some details of chromites chemical composition pointed to the influence of another source rocks (for instance, Saranovskiy Massive in the Middle Urals).