The Ordovician Urvantsev Evaporite Basin in the Northern Part of the Kara Sea

摘要

The presence of Ordovician evaporites in the North Kara sedimentary basin, like the Severnaya Zemplya archipelago and the Timan-Pechora basin, was predicted [8j. In the northwest part of the North Kara basin, specialists of OAO Sevmorneftegeofizika and other organizations have distinguished the evaporite trough containing salt diapirs [2]. Based on the seismic profiling data, we also analyzed the evaporite part of the basin (the so-called Urvantsev trough; see Fig. 1) [41. In the present communication, we characterize this trough, substantiate the age of salts and give a concept about the Early Paleozoic Paleogeography of the North Kara region.