Khronostratigrafiya verkhnechetvertichnykh osadkov severo-zapadnoy Patsifiki i Beringova morya, izmeneniye sredy i bioproduktivnosti  [Chronostratigraphy of upper Quaternary sediments in the Northwest Pacific and Bering Sea, change of environment and bioproductivity]

Alternate Title(s): Chronostratigraphy of upper Quaternary sediments in the Northwest Pacific and Bering Sea, change of environment and bioproductivity
Author(s): Gorbarenko, S. A.; Artemova, A. V.
Author Affiliation(s): Primary:
Rossiyskaya Akademiya Nauk, Dal'nevostochnoye Otdeleniye, Tikhookeanskiy Okeanologicheskiy Institut, Vladivostok, Russian Federation
Volume Title: Tikhookeanskaya Geologiya
Source: Tikhookeanskaya Geologiya, 22(5), p.23-38. Publisher: Nauka, Moscow, Russian Federation. ISSN: 0207-4028
Note: In Russian with English summary. 49 refs.; illus., incl. table, sketch maps
Summary: The isotope chronostratigraphy of the upper Quaternary sediments of two cores from the NW Pacific and two cores from the Bering Sea is established by the oxygen isotope records in planktonic and benthic foraminifers. The main regularities of temporal changes in the calcium carbonate, organic carbon, and opal content and magnetic susceptibility in sediments of the study region with regard to the climatic changes and productivity are established by means of isotopic-geochemical and lithophysical analyses of these cores and the ODP sites 882 and 883. The correlation of the volcanogenic interbeds in the sediments of the studied cores is carried out, and their stratigraphy and age are preliminary ascertained. The schemes of the average sedimentation rate in the NW Pacific and Bering Sea for the period of MIS 1 and MIS 2 (1-12.5 and 12.5-24 kyr BP, respectively) are plotted on the basis of the obtained results and correlation of the diatom horizons and lithological units in the early studied cores with the oxygen isotope stages. Closure of the Bering Strait and the aeration of the northeastern shelf of the Bering Sea during the MIS 2 induced the growth of sedimentation rate in the Bering Sea, as compared with MIS 1 and the suspended material transfer from the Bering Sea through Kamchatka Strait into NW Pacific and its accumulation in the southeastern direction.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 06 Petrology, Sedimentary; 24 Surficial Geology, Quaternary Geology; Algae; Benthic taxa; Bering Sea; Cenozoic; Chemostratigraphy; Chronostratigraphy; Climate change; Detroit Seamount; Diatoms; Emperor Seamounts; Foraminifera; Invertebrata; Isotope ratios; Isotopes; Leg 145; Marine sediments; Microfossils; North Pacific; Northwest Pacific; O-18/O-16; ODP Site 882; ODP Site 883; Ocean Drilling Program; Oxygen; Pacific Ocean; Paleoecology; Paleoenvironment; Planktonic taxa; Plantae; Protista; Quaternary; Sediments; Stable isotopes; Upper Quaternary; West Pacific
Coordinates: N511155 N511155 E1674607 E1674607
N502148 N502148 E1673600 E1673600
Record ID: 2014076694
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by ICSTI, Moscow, Russian Federation