『Abstract
The giant Mn ore deposits of the Paratethys are located on the
slopes and/or margins of deep basins. The Eocene ocean and associated
basins were strongly influenced by large-scale submarine hydrothermal
activity which supplied prodigious amounts of Ca, CO2,
SiO2, Mn, and other components to the oceans.
This caused a substantial shift in seawater composition and resulted
in the deposition of carbonates as well huge amounts of Mn. The
giant Mn ore deposits of the Eastern Paratethys were formed as
a consequence of the Early Oligocene global transgression in shelf
environments of marginal and epicontinental seas, frequently with
anoxic regime of the bottom water.
Keywords: Mn ore giant deposits; Eastern Paratethys; Ocean hydrothermal
activity; Black shale basins; Early Oligocene, Global transgression;
Recycling; Diagenesis』
1. Introduction (formulation of the problem)
2. Materials and methods
3. Manganese ore basins
4. Paleostructure-paleogeographic features of the Mn ore basins
5. Geochemical features of the World Ocean at the Eocene/Oligocene
boundary
6. The role of submarine hydrothermal activity in the geochemistry
of sedimentation in the World Ocean
7. Geochemical effects of submarine hydrothermal activity as exemplified
by Ca, CO2, and Mn
8. Features of sedimentation, climate changes, and eustatic oscillations
of the World Ocean level at the Eocene/Oligocene boundary
9. Mn ore formation in the basins of the Eastern Paratethys
10. Conclusions
Acknowledgements
References