N. G. Vashchenkova and I. B. Tsoy
Ilyichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia
e-mail: vashenkova@poi.dvo.ru; tsoy@poi.dvo.ru
Received July 19, 2011; in final form, April 15, 2013
Abstract—The petrographic and micropaleontological studies of the rocks in the sedimentary cover of the Pri-
morye continental slope in the area of Vladimir Bay in the Sea of Japan made it possible to establish that the
sedimentary cover is represented in this area by two different facial complexes of Late Miocene rocks. The first
facial complex consists of terrigenous rocks (siltstones, sandstones, and conglomerates) that were accumulated
under relatively shallow-water conditions of the shelf and the uppermost part of the continental slope. The sec-
ond one is formed by diatomaceous–clayey rocks under more deep-water conditions, mainly in the upper part
of the continental slope. The carbonate nodules that are widely distributed among the deposits of the first complex
but are also recorded in the second one were formed as a result of diagenetic processes in the terrigenous or silicious–
terrigenous sediments that had been formed. With respect to their age, the Late Miocene deposits are characterized
by a full succession of diatomaceous zones over 10.0–5.5 mln yr. The sediments of the first facial complex accumu-
lated during the first third of the Late Miocene (10.0–8.5 mln yr), while those of the second began to accumulate
somewhat later, but their accumulation continued until the late Miocene (9.2–5.5 mln yr).
10.1134/S000143701403014X
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