S on the contemporary hydrothermal activity have been detected by the abnormally high values of heat flow. In seawater, an acoustic anomaly caused by the gas bubbles, too because the low Eh values and high concentrations of CH4 , H2 S, Mn2 . In bottom sediments, the ash layers had been located to date back to around 7000 years ago (time of your last eruption [34]. The Piip Volcano is composed of three fused edifices, northern, central, and southern, among which the FAUC 365 supplier northern and southern ones are greater; these tops resemble a submeridional chain. The northern best with a minimum depth of 360 m was formed by andesite and dacite. There, hydrothermal manifestation happens at depths of much less than 650 m, exactly where shimmering water and bacterial mats were observed. A local discharge of hydrothermal fluids occurred by means of the anhydrite edifices (up to 1.5 m high) emitting milky-white fluid in the leading. The seafloor about these edifices was covered with white-coloured hydrothermal deposits composed of crystallized gypsum with an admixture of anhydrite. At a distance in the vent edifices, the seafloor is covered using the nonconsolidated ochre-coloured deposits composed of opal and pyrite. On the southern prime, situated deeper than 460 m and 3.86 km southwards the northern a single, the second variety of hydrothermal manifestation was revealed [34]. The southern best and slopes are composed of dacite pumice, although in its centre, a large hydrothermal structure, 3-Chloro-5-hydroxybenzoic acid medchemexpress shaped like a long hill to ten m height, is presented by largely barite and Ca carbonate. On the southern prime, the local vents are connected with small (up to 40 cm) conical carbonate structures [27]. In the Piip Volcano’s tops, both the decreased and also the oxidized facies of hydrothermal sediments had been revealed. The decreased facies were represented by anhydrite, gypsum, barite, and carbonate (aragonite) with sulfidic (pyrite) particles; the latter have been dispersed in opal, anhydrite, barite, calcite, and aragonite. The anhydrite deposits are formed at a rather wide array of temperature, 180 to 360 C, while a hydrothermal option is mixed with bottom ocean water which contains sulphate-ion SO4 2- [35]. A a lot more correct temperature interval for anhydrite precipitation was estimated as 25060 C [33]. Taking into account a phase separation of your initial hydrothermal option during circulation, the non-oreMinerals 2021, 11,in opal, anhydrite, barite, calcite, and aragonite. The anhydrite deposits are formed at a rather wide selection of temperature, 180 to 360 , whilst a hydrothermal resolution is mixed with bottom ocean water which contains sulphate-ion SO42- [35]. A additional precise temper4 of ature interval for anhydrite precipitation was estimated as 25060 [33]. Taking into 26 account a phase separation from the initial hydrothermal answer during circulation, the non-ore minerals have been assumed to become deposited inside the middle-temperature circumstances [36]. In line with the micro-SEM-X-ray analysis, in pyrites, the abnormally high minerals had been assumed to be deposited inside the middle-temperature conditions [36]. contents of As, Sb, Hg, and Ag (0.ten to four.ten ) had been detected [32]. Such high contents of In accordance with the micro-SEM-X-ray analysis, in pyrites, the abnormally higher contents of As, these components in pyrites had been not observed inside the other hydrothermal deposits inside the Sb, Hg, and Ag (0.ten to four.10 ) have been detected [32]. Such higher contents of these elements ocean rift zones [36]. The oxidized facies, that have been widely developed at.