Open AccessMINERAL COMPOSITION OF THE SEDIMENTS AS AN INDICATOR OF SUPPLY SOURCES AND SPECIFIC FEATURES OF CLASTIC MATERIAL DISTRIBUTION IN THE OKHOTSK SEA
Author(s) -
Н. А. Николаева,
A. N. Derkachev,
I. V. Utkin
Publication year - 2021
Publication title -
tihookeanskaâ geologiâ
Language(s) - English
Resource type - Journals
ISSN - 0207-4028
DOI - 10.30911/0207-4028-2021-40-1-87-98
Subject(s) - clastic rock , geology , bay , sedimentation , heavy mineral , mineral , geochemistry , sediment , oceanography , provenance , mineralogy , sedimentary rock , geomorphology , ecology , biology
The mineral composition of the heavy subfraction from surface sediments of the Okhotsk Sea was studied using both two detailed profiles (Magadan-Kuril Islands and Shantar Islands-Central Basin) and data from the Sakhalin Bay. The obtained data were analyzed using the methods of multivariate statistics, which allowed to identify the main associations of heavy minerals and to show regional differences in mineral complexes of marine sediments. A significant effect of solid Amur River discharge on sedimentation processes is traced. The main processes responsible for the formation of the mineral appearance of studied sediments are determined. Two large regional sources of clastic material – the Amur-Sakhalin and Kuril-Kamchatka supplying provinces – had a major influence on the formation of mineral composition of the sediments.