Thermal Fluid Geochemistry in Caldera Academy Nauk (Kamchatka, Russia)

Abstract

In lake Karymskoe (Russia, Kamchatka) in 1996 has taken place underwater eruption therefore the structure of water of lake and his (its) physical and chemical parameters has essentially changed, and on his (its) coast has taken place reorganization gasgeothermal outputs (exits). The basic purpose of the works spent since 1996 on present time - studying and an estimation of consequences of underwater eruption on water object and an environment. At once after eruption outputs (exits) highly mineralized sources which part has gradually disappeared were observed, and in some there was a gradual decrease (reduction) of a mineralization. By change of the maintenance (contents) of chlorine and a pine forest having obviously deep origin, took place saturation superficial waters. And, alongside with simple saturation atmospheric waters occured and adulteration lixiviate from the fresh cast out breeds (and also ashes from be in eruption Karymsky volcano) easily mobile components, first of all sulfur, calcium, sodium, magnesium. The wide range of fluctuations of physical and chemical conditions of solutions in a modern output (exit) gasgeotherm clearly correlates with change of a chemical compound. Deep sodium chloride solutions of sources of the Academy of sciences gravitate to a field of alkaline regenerative conditions, while for solutions with the greater share of a sulfate - ion (it is obvious, formed at mixture with superficial waters) less alkaline conditions are characteristic at same variations Eh. Occurrence of a significant amount of a hydrocarbonate typically for subalkaline oxidizing conditions.
Displays endogenous fluid system in caldera Academies of sciences are characterized by the raised(increased) maintenance(contents) in waters of thermal sources of such elements, as B, Li, Sr, As, Mo, V, Ni, Ga, Ge, Zr, Cu, Zn, Br. By much sulphatic structure of water and sour lakes Karymskoe up to pH-3.2 as a result of eruption of 1996, in structure deep flying prevailed SO2 and H2S, that it is more typical for andesite magmas. In the volcanic centre now with the big dynamism processes of formation of new structures, volcanogenic and sedimentary formations(educations), a chemical compound of reservoirs proceed.
Now observation proceed as regime.