ON THE UPPER PROTEROZOIC STRATIGRAPHY IN THE KOLA-PENINSULA COAST (THE BARENTS SEA REGION)

The results of joint fieldwork with geologists from the Geological Sur vey of Norway refine the Upper Proterozoic correlation scheme for the Barents Sea region and substantiate recognition of three structural-fa cial zones: Terskii (a continental area), Tana-Kil'din (a stable conti nental margin), and Barents Sea-Rybachii tan active transitional area to a continental slope). There were three extensive stages of the Late Proterozoic sedimentation: (1) the Late Riphean accumulation of undif ferentiated deposits at the edge of an active continental slope (the K ongsfjord Formation, the Eina and Bargoutnyi groups); (2) deposition o f transgressive differentiated sediments, including carbonates, in the terminal Late Riphean (the uppermost beds of the Barents Sea Group, t he Vadso and Tana groups, Kil'din Group, and a parr of the Volokovaya Group); and (3) the Late Riphean-Vendian sedimentation marked by accum ulation of tillite horizons in the Norwegian territory (the Lokvikfjel let and Vestertana groups and, probably, a part of the Volokovaya Grou p). The large lineament separating the Tana-Kil'din and Barents Sea-Ry bachii zones is named ''The Sokolov line'' in honor of B.S. Sokolov, w ho was first to recognize this structural element as the northern bord er of the Russian platform in the Late Precambrian time.