Morpholithogenetic characteristic of Peter the Great Bay (Japanese Sea)
Abstract
Results of the geological and geomorphological researches of a bottom and coastal zone of Peter the Great Bay executed in 2012-2013 are given in the article. By the results of works the bottom relief and the structure of coasts are characterized, the ground rainfall is studied. Four types of coasts are distinguished: abrasion, abrasion accumulative, accumulative and lagoon coasts. The bottom of the gulf represents rather equal, inclined surface within which the erosive valleys promoting carrying out of fine material to the external shelf are established. The granulometric composition and mineralogical structure of bottom sediments is analyzed. Distribution of types of bottom sediments has a complex pattern that is caused by hydrodynamic and lithodynamic processes and the existence of two large gulfs shooting out into the land. In general the atypical distribution of rainfall is noted: from the coast towards a shelf edge there is a change of bottom sediments: clay - silt - sand. Lithological types of bottom deposits and the main associations of heavy minerals are allocated. Results of statistical processing of the contents of light and heavy minerals are presented. The received materials are displayed on five maps of Peter the Great Bay.
About the Authors
V. V. Motychko
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
A. Yu. Opekunov
Saint-Petersburg State University
Russian Federation
Russian Federation
S. R. Kotov
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
G. N. Sokolov
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
V. A. Scherbakov
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
A. O. Kartashov
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
V. M. Konstantinov
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
V. I. Slinchenkov
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
Yu. G. Samoilovich
All-Russian Research Institute of Geology and Mineral Resources of the World Ocean
Russian Federation
Russian Federation
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Review
For citations:
Motychko V.V., Opekunov A.Yu., Kotov S.R., Sokolov G.N., Scherbakov V.A., Kartashov A.O., Konstantinov V.M., Slinchenkov V.I., Samoilovich Yu.G. Morpholithogenetic characteristic of Peter the Great Bay (Japanese Sea). Proceedings of the Russian Geographical Society. 2015;147(1):21-37. (In Russ.)
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