Инд. авторы:	Laptev Y.V.
Заглавие:	Computer reconstruction of the physicochemical conditions of sulfide formation for the Krasnov and Ashadze hydrothermal systems (Mid-Atlantic Ridge)
Библ. ссылка:	Laptev Y.V. Computer reconstruction of the physicochemical conditions of sulfide formation for the Krasnov and Ashadze hydrothermal systems (Mid-Atlantic Ridge) // Russian Geology and Geophysics. - 2015. - Vol.56. - Iss. 6. - P.893-902. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2015.05.006; РИНЦ: 24043739; SCOPUS: 2-s2.0-84930590310; WoS: 000355922000006;
Реферат:	eng: Computer-based reconstruction of the physicochemical conditions of formation of the Krasnov (16 degrees N) and Ashadze (13 degrees N) submarine systems in the Mid-Atlantic Ridge (MAR) has been performed using the equilibrium-thermodynamic approach to study samples from these sites. In the first case, a sphalerite-pyrite-barite association was considered, and in the second case, a sphalerite-pyrite association. In the modeling conducted, the composition of the sphalerite solid solution corresponding to the nonideal mixing of ZnS and FeS was used as a correlation parameter with the total composition of the Fe-Zn-Ba-S-H2O-NaCl-HCl hydrothermal system depending on temperature (200-300 degrees C) and a given pressure of 100 bar. The calculation results predict that at an iron content of 0.17-0.36 wt.% in sphalerite, the minimum formation temperatures of the equilibrium sphalerite-pyrite-barite association should correspond to the interval of 280-300 degrees C (Krasnov site). As the iron content in sphalerite increases to 4.15-13.28 wt.%, the occurrence of barite in the systems studied becomes impossible and the formation temperatures of the sphalerite-pyrite association become equal to or higher than 300 degrees C (Ashadze site). (C) 2015, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
Ключевые слова:	TRANSPORT; hydrothermal systems; sulfide formation; nonideal solid solution; sphalerite;
Издано:	2015
Физ. характеристика:	с.893-902