Инд. авторы:	Bortnikov N.S., Simonov V.A., Amplieva E.E., Stavrova O.O., Fouquet Y.
Заглавие:	The physicochemical conditions of hydrothermal ore-forming systems of 'black smokers' associated with mantle ultrabasites in the Central Atlantic region
Библ. ссылка:	Bortnikov N.S., Simonov V.A., Amplieva E.E., Stavrova O.O., Fouquet Y. The physicochemical conditions of hydrothermal ore-forming systems of 'black smokers' associated with mantle ultrabasites in the Central Atlantic region // Russian Geology and Geophysics. - 2011. - Vol.52. - Iss. 11. - P.1412-1420. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2011.10.010; SCOPUS: 2-s2.0-80455149735;
Реферат:	eng: Study of fluid inclusions in minerals from sulfide ores sampled in the Ashadze and Logatchev hydrothermal fields during the Serpentine cruise of the R/V Pourquoi Pas? in 2007 gave an insight into the physicochemical conditions of ore-forming systems of 'black smokers' associated with mantle ultrabasites in the Central Atlantic region. It was established that the studied hydrothermal systems differ in mineral formation temperatures, fluid salinity, and hydrothermal processes running within basaltic complexes in both low-spreading (Mid-Atlantic Ridge) and high-spreading (East Pacific Rise) mid-ocean ridges. It was shown for the Ashadze and Logatchev hydrothermal fields that the temperatures and salinity of inclusion solutions in the minerals vary over a wider range of values than those of fluids flowing out from the ridge vents onto the ocean floor. Study of fluid inclusions showed that the Ashadze and Logatchev sulfide structures resulted from the action of both high-temperature (up to 355 °C) and low-temperature (no lower than 170 °C) solutions. The salinity of fluid in the inclusions (mainly 8 wt.%) is more than twice as high as the salinity of seawater. The data obtained substantiate the phase separation of fluid in the deepest-water submarine hydrothermal Ashadze system and give an idea of the chemical composition and temperature of fluids forming sulfide deposits in the Ashadze and Logatchev hydrothermal fields in the Central Atlantic region. © 2011.
Ключевые слова:	Mid-Atlantic Ridge; East Pacific Rise; Atlantic Ocean (Central); Atlantic Ocean; temperature effect; salinity; physicochemical property; ore-forming fluid; ore deposit; mantle; hydrothermal system; hydrothermal activity; fluid inclusion; chemical composition; black smoker; Physicochemical conditions; Mid-Atlantic Ridge; Hydrothermal fields; Fluid inclusions; Pacific Ocean; Black smokers;
Издано:	2011
Физ. характеристика:	с.1412-1420