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M. V. Krivitskaya
M. V. Krivitskaya
post-graduate student
Saint Petersburg State Mining Institute (Technical University)
post-graduate student
Saint Petersburg State Mining Institute (Technical University)

Articles

Geology and geophsics
  • Date submitted
    2010-07-13
  • Date accepted
    2010-09-25
  • Date published
    2011-01-01

Hydrogeological typisation of the north part of the Mid-Atlantic ridge

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The deep basite-hyperbasite rocks wich are special features for the north part of the Mid-Atlantic Ridge (MAR) are observed. The hydrogeological structures of the MAR are distinguished.

How to cite: Krivitskaya M.V. Hydrogeological typisation of the north part of the Mid-Atlantic ridge // Journal of Mining Institute. 2011. Vol. 189. p. 42-45.
Geology and geophsics
  • Date submitted
    2010-07-20
  • Date accepted
    2010-09-04
  • Date published
    2011-01-01

Forming of the composition of hydrotermal solutions in hydrogeological massifs of ultrabasic rockes of the Mid-Atlantic ridge

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Difference in structural position and influence of ores from different types of sediments on the geochemical characteristic of ores are observed. Results of end member composition correlation analysis show negative link of H 2 S with CH 4 и Н 2 .

How to cite: Sudarikov S.M., Krivitskaya M.V. Forming of the composition of hydrotermal solutions in hydrogeological massifs of ultrabasic rockes of the Mid-Atlantic ridge // Journal of Mining Institute. 2011. Vol. 189. p. 68-71.
Problems of shelf development: geology and ocean engineering
  • Date submitted
    2007-09-10
  • Date accepted
    2007-11-23
  • Date published
    2008-03-01

Geochemistry of submarine ore-forming hydrotherms of the North Atlantic according to the data of remote observations and sampling from underwater manned vehicles

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Fluid and plume geochemical characteristics of Mid-Atlantic Ridge (MAR) hydrothermal fields have been compared. Similar geological traits of Logatchev and Rainbow fields are location of their discharge zones in ultramafic environments. High H 2 and СH 4 concentrations reflect the influence of serpentinization processes on forming of a fluid composition. The concentration of H2S is noticeably less in comparison with fluids of other Atlantic hydrothermal fields. Regression analysis shows that all the sulfur found out in samples from fluids and plumes of both fields is represented in the form of sulphate-ion. This lead to supposition of negative correlation of H 2 S and СH 4 . Sampling of fluids during dives on DSRV ALVIN and plumes from board of RV ATLANTIS let me to calculate the end member composition. It testifies to sharp distinctions in solution composition of Rainbow and Logatchev fields. In case of the Rainbow highly mineralized fluids are characteristic. On the Irina-2 vent of the Logatchev area solutions with distinctly less macrocomponent (first of all Na and Cl) concentrations were sampled as compared to ocean water. Quite noticeable are differences in concentrations of Fe and Mn. For Rainbow fluids the highest contents of Fe (> 1300 mg/l) and Mn (up to 123 mg/l) observed in MAR hydrothermal fields are characteristic. Concentrations of these elements in Irina-2 vent fluids decrease for the order of magnitude.

How to cite: Andreeva S.M., Krivitskaya M.V., Kaminskiy D.V. Geochemistry of submarine ore-forming hydrotherms of the North Atlantic according to the data of remote observations and sampling from underwater manned vehicles // Journal of Mining Institute. 2008. Vol. 176. p. 26-30.