Transformation of the mineral composition of ferromanganese crusts under the influence of hydrogen sulfide |
| |
| Authors: | G N Baturin V T Dubinchuk I O Krylov |
| |
| Institution: | 1.Shirshov Institute of Oceanology,Russian Academy of Sciences,Moscow,Russia;2.Fedorovskii All-Russia Research Institute of Mineral Resources,Moscow,Russia |
| |
| Abstract: | Experiments devoted to interaction between the material of ferromanganese crusts (FMC) of Pacific seamounts and hydrogen sulfide
at temperatures ranging from 100 to 600°C unraveled the formation of pyrite microcrystals at 100°C. Upon heating, the pyrite
acquires more perfect crystalline form at 200°C and breaks down at 600°C. The formation and breakdown of magnetite take place
according to the same similar scenario. At 200°C, one can see the formation of lumpy aggregates of the slightly crystallized
alabandine transformed at 600°C into lamellar crystals, which accumulate the whole Mn and part of Fe hosted in rock. At maximal
temperature, platinum and gold are crystallized selectively as lamellar particles and native sulfur is accumulated. The composition
of these newly formed minerals is incomparable with the mineralogy of natural FMCs. This is inconsistent with the assumption
about the possible influence of hypothetic hydrosulfuric emanations on the formation of minerals mentioned above. However,
experimental results demonstrate an extremely high sorption capacity of FMCs relative to hydrogen sulfide, suggesting great
prospects of the practical application of FMCs for the industrial and ecological purposes. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
