Physical properties, mineral and chemical compositions, and accumulation rates of Holocene and Upper Pleistocene bottom sediments from the Sea of Okhotsk


Mineral and chemical compositions and physical properties of diatomaceous clayey-siliceous sediments from the Sea of Okhotsk are studied. Accumulation rates of silica are determined. Their compositional model based on silica content is similar to that of Late Jurassic and Olenekian-Middle Anisian cherts from the Sikhote Alin region. Thickness of Holocene siliceous unit and accumulation rates of siliceous deposits depended on bioproductivity in the upper water layer and seafloor topography. Accumulation rates of amorphous SiO2 (0.05-5.7 g/cm2/ka) and free SiO2 (0.5-11.6 g/cm2/ka) are minimal on seamounts and maximal in depressions near foothills. These values match accumulation rates of free SiO2 in Triassic and Late Jurassic basins of the Sikhote Alin region (0.33-3 g/cm**2/ka). Comparison of composition and accumulation rates of silica shows that Triassic and Late Jurassic siliceous sequences of Sikhote Alin could accumulate in a marginal marine basin near a continent.

Supplement to: Volokhin, Yu G; Astakhov, Anatolii S; Vashchenkova, N G (2004): Holocene Siliceous Sediments in the Sea of Okhotsk. Lithology and Mineral Resources, 39(3), 259-280

Related Identifier
Metadata Access
Creator Volokhin, Yu G; Astakhov, Anatolii S; Vashchenkova, N G
Publisher PANGAEA
Publication Year 2004
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 5 datasets
Discipline Earth System Research
Spatial Coverage (144.732W, 46.973S, 153.623E, 58.583N); Sea of Okhotsk