MINERALOGICAL COMPOSITION AND TYPOMORPHISM AS ORIGIN INDICATORS OF FERROMANGANESE ORE FORMATIONS OF THE INDIAN OCEAN
Journal Title: Geologia i poleznye iskopaemye mirovogo okeana - Year 2018, Vol 14, Issue 4
Abstract
Major part of publications, which are dedicated to ferromanganese formations, consider ferromanganese nodules as well. Though, the spectrum of ocean ferromanganese ore genesis is much wider. It includes nodules, buried nodules, microconcretions, crusts, crustslike formations. This article is dedicated to the studies of all forms of ocean ferromanganese ore genesis by the example of the Indian Ocean. Detailed data about mineralogical and chemical composition, as well as morphology and inner structure was obtained from the samples, collected during surveys in the Indian Ocean, which were carried out by Odesa National I.I.Mechnikov University. Xray diffraction method was used. The chemical composition was determined by atomic absorption and Xray fluorescent spectral analysis. The data about distribution, morphology, chemical and mineralogical composition of ferromanganese formations, as well as crystalchemical features of manganese minerals, which constitute these formations is presented in this article. Analysis of the mineralogical composition of formations of different origin allowed to allocate their mineralogical types. The allocation of these types is based on mineralogical associations and crystalchemical features of the minerals, which constitute them. Sedimentological (hydrogenous) formations (concretions and crusts) are made of iron and manganese hydrous oxides with irregular pseudo layered structure. Sedimentological and diagenetic ore formations (concretions) are made of hydrous oxides of manganese with layered type of crystal structure and mobile interlayer space, e.g. buzerit, mixedbedded asbolanbuzerit. Diagenetic ore formations (concretions and micro concretions) are made of hydrous oxides of manganese with layered type of crystal structure and mobile interlayer space (buzerit, mixedlayered asbolanbuzerit), as well as of ordered hydrous oxides with layered structure — bernessit. Hydrothermalsedimentological ore formations are characterized by the presence of ordered, layered, hydrous oxides (bernessit) as well as manganese minerals with tunnel type of crystal structure (todorokit, pirolyusit). Reconsideration of existing data about mineralogical composition of ocean ferromanganese formations allowed estimating manganese ore genesis in its all aspects as a characteristic feature of oceanic sedimentogenesis, from a new angle.
Authors and Affiliations
І. O. Suchkov
Keywords
Related Articles
- EP ID EP545983
- DOI 10.15407/gpimo2018.04.063
- Views 57
- Downloads 0
AZOV-ADRIATIC MEGALINEAMENT AS TRANSREGIONAL ZONE OF CONJUGATED DEEP FAULTS OF SOUTHERN EUROPE
From the analysis of interpreted space imagery and other geological materials we specified the location of Azov-Adriatic lineament, which is one of the largest linear geomorphological structures (fault zones) of the Sout...
Representation validity check by velocity models of Bransfield strait earth's crust structure
For the first time combined bottom bathymetry schemes and gravity field anomalies in the free air of the Bransfield Strait (Western Antarctica), constructed by the authors according to international online surveys, are p...
HEAVY METALS IN THE GEOLOGICAL-ECOLOGICAL SYSTEM OF THE BOTTOM SEDIMENTS OF THE CONTINENTAL SLOPE OF THE BLACK SEA
The results of research on the distribution of some heavy metals in the geological-ecological system of the Black Sea sediments are presented. It was found that the average concentrations of trace elements in the geologi...
ACCOUNTING THE PECULIARITIES OF THE WORLD OCEAN FLOOR STRUCTURE WHEN SELECTING THE ZONE OF GAS HYDRATE FORMATION
Gas hydrate deposits in the World Ocean are considered as an additional non-traditional source of hydrocarbons. The dependence of the gas hydrates deposits spread in different types of host rock from the structures of th...
Prospects for implementation of investment projects for development of hydrocarbon resources of the ukrainian sector of the North-Western Black Sea shelf
Some geological, technological, economic and regulatory aspects of the realization of investment projects for exploration and production of gas in the Ukrainian sector of the Black Sea are investigated. The geological-ec...