The periphery of in pyrites have been not observed in the other hydrothermal deposits inside the ocean rift zones [36]. the active hydrothermal field, have been composed of the poorly crystallized orange-yellow The oxidized facies, that were broadly created in the periphery with the active hydrothermal oxyhydroxides of Fe, and black Mn minerals (rhombic birnessite) depleted in trace elefield, were composed in the poorly crystallized orange-yellow oxyhydroxides of Fe, and ments, these minerals had been characteristic for most on the low-temperature hydrothermal black Mn minerals (rhombic birnessite) depleted in trace elements, these minerals had been deposits [31]. characteristic for many from the low-temperature hydrothermal deposits [31]. two.two. Components 2.2. Supplies For this study, thethe field material was sampled on the underwater active Piip Volcano For this study, field material was sampled on the underwater active Piip Volcano (555 25 1670 20 in the course of the the 82nd cruiseRV RV Akademik M.A. Lavrentyev, performed (55 N, N, 167 E) E) for the duration of 82nd cruise of of Akademik M.A. Lavrentyev, carried out by by the A.V. Zhirmunsky National Scientific Centre of Marine Nitrocefin Anti-infection Biology (June uly 2018) the A.V. Zhirmunsky National Scientific Centre of Marine Biology (June uly 2018) (Figure 1). 1). (Figure(a)(b)Figure 1. Location in the the submarine Piip Volcano thethe thethe rear thethe Aleutian Islands’ arc, the Figure 1. Location of submarine Piip Volcano in in in in rear of of Aleutian Islands’ arc, the south-eastern Bering SeaSea (a), and bathymetryits northern and southern tops (b). The redred patches south-eastern Bering (a), and bathymetry of of its northern and southern tops (b). The patches indicate places covered with bacterial mats marking thethe diffuse seepage. indicate areas covered with bacterial mats marking diffuse seepage.The location of hydrothermal manifestations of thethe Piip Volcano was investigated throughout The region of hydrothermal manifestations of Piip Volcano was investigated throughout 4 dives of ROV Comanche-18 [30]. As well as a handful of active hydrothermal structures, four dives of thethe ROV Comanche-18 [30]. Together with a couple of active hydrothermal structures, thethe big areas diffuse seepage were recorded (Figure two).two). significant places of of diffuse seepage were recorded (Figure In the northern top, these outflows are located under fragmented dacitic lavas, while around the southern top, they may be mainly related with cracks in the carbonate deposits [30]. These two web sites differ in such