Evidence of the Early Precambrian Age of Metamorphic Rocks from the Ufaley Block (Middle Urals): Results of U–Th–Pb (LA-ICP-MS) Dating of Detrital Zircon from the Quaternary Deposits
摘要
Abstract
U–Th–Pb (LA-ICP-MS) geochronological studies of detrital zircon from the Quaternary deposits of the western part of the Ufaley block (Middle Urals) were performed. The studied area was a tectonic fragment composed of an amphibolite–gneiss complex containing bodies of Precambrian clinopyroxenites. The pronounced age maximum corresponds to the age interval of 2100–2000 Ma, and several small peaks correspond to the interval of 3200–2500 Ma. All this gives us a good reason to believe that Early Precambrian rocks, which have not been identified before, are present within the Ufaley block.