scholarly journals Interaction of fresh and submarine saline groundwater in the coastal zone of the Sea of Okhotsk and the Sea of Japan

2021 ◽  
Vol 895 (1) ◽  
pp. 012018
Author(s):  
V V Kulakov
Keyword(s):  
Coastal Zone ◽  
Sea Of Japan ◽  
Sea Of Okhotsk ◽  
The Sea Of Japan ◽  
Western Coast ◽  
Fresh Groundwater ◽  
Saline Groundwater ◽  
The Sea Of Okhotsk ◽  
Intrusive Rocks ◽  
Aquifer Complex

Abstract The multidirectional interaction of fresh groundwater of land with a mineralization of 0.1 - 0.2 g/dm3 and submarine saline groundwater in the coastal zone of the western coast of the Sea of Okhotsk and the Sea of Japan has been characterized. The main hydrochemical background in the coastal zone of the seas is created by ultra-fresh and fresh hydrocarbonate groundwater of land in the free gravity runoff zone. The main types of submarine groundwater are silt sediment waters, pore-stratal and fissure-stratal waters of sedimentary rocks, fissure and fissure-vein waters of effusive, metamorphic and intrusive rocks. With the salinity of the modern sea waters within the range of 30-34.4 g/dm3, a decrease is traced from 27-30 g/dm3 in the sediments of the Upper Miocene-Holocene aquifer complex to 14-20 g/dm3 in the sediments of the Oligocene-Lower Miocene complex. Fresh groundwater of volcanogenic hydrogeological basins, the deposits of which have been explored in basalts, are distinguished by special advantages. These waters do not have environmental restrictions for drinking, they belong to the highest class and their resources may well be involved for a worthy use within the region and beyond.

scholarly journals Trace element composition of the Southwestern Sakhalin Chum Salmon

2021 ◽  
Vol 937 (2) ◽  
pp. 022074
Author(s):  
A Litvinenko ◽  
N Khristoforova ◽  
V Tsygankov ◽  
M Kovalchuk
Keyword(s):  
Sea Of Japan ◽  
Sea Of Okhotsk ◽  
Chum Salmon ◽  
Trace Element Composition ◽  
Oncorhynchus Keta ◽  
The Sea Of Japan ◽  
The Sea Of Okhotsk ◽  
Lead And Cadmium ◽  
The Difference ◽  
The Impact

Abstract The study is devoted to the microelement composition of organs and tissues of chum salmon (Oncorhynchus keta), which came for spawning in September 2018 in the r. Lovetskaya on the southwestern coast of Sakhalin. Samples of organs and tissues of fish, prepared in Sakhalin, were frozen and delivered to Vladivostok for chemical analysis. Trace elements were determined from acid mineralizates by atomic absorption on a Shimadzu AA 6800. It was found that the content of microelements indicating anthropogenic impact on the environment (Zn, Cu and Ni) in the Sea of Japan chum was significantly higher than the content of those in the Okhotsk Sea fish. So, for example, the amount of zinc in the muscles of the Sea of Japan chum salmon was 2.5 times higher than in those of the Sea of Okhotsk fish. In the liver, the effect was even greater - the difference between the content of this element in the Sea of Japan and the Sea of Okhotsk reached 19 times. At the same time, in the organs and tissues of the Okhotsk chum salmon, which crossed the impact geochemical zone in the Kuril-Kamchatka region at least twice during its life cycle, the content of lead and cadmium, witnesses of underwater and surface volcanism in the Kuril straits, prevailed. The content of lead in the muscles of chum salmon from r. Raidovaya was 4 times more than in the muscles of chum salmon from the river. Lovetskaya; in the liver, the difference was 5 times.

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