Description of the fossil manganese nodules found in the Oligocene clay deposits of Moravia, Brno area, Czech Republic
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| Format: | Dataset Open Access |
| Language: | en |
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1885
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| _version_ | 1867170990056800256 |
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| author | Rzehak, A |
| author_facet | Rzehak, A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In the green Oligocene clay of Krizanovice (former Krzyzanowicz) the author found numerous black nodules. In the 3-4 centimeter thick black crust of a particular specimen the concentration in MnO2 is evaluated at 46.6% MnO2. The determination was done using the Volhard's method (precipitation of Fe by ZnO and titration with KMnO4). Only the dissoleved part in HCL was analysed. The non soluble residue was essentially a silica precipitate in the form of many gray flakes. The specific gravity of the crust was evaluated at 3.8. In the internal yellow core the amount of manganese is about 2.39% MnO2. Due to the light color it is judged to probably be in the form of Mn2O3. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_858742 |
| institution | PANGAEA |
| language | en |
| publishDate | 1885 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Description of the fossil manganese nodules found in the Oligocene clay deposits of Moravia, Brno area, Czech Republic Rzehak, A Comment; Deposit type; DEPTH, sediment/rock; Description; Geologic age name; Identification; Krizanovice_R; Krizanovice, Czech Republic; Manganese; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; PROFILE; Profile sampling; Quantity of deposit; Sediment type; Size; Substrate type; Visual description; Wet chemistry In the green Oligocene clay of Krizanovice (former Krzyzanowicz) the author found numerous black nodules. In the 3-4 centimeter thick black crust of a particular specimen the concentration in MnO2 is evaluated at 46.6% MnO2. The determination was done using the Volhard's method (precipitation of Fe by ZnO and titration with KMnO4). Only the dissoleved part in HCL was analysed. The non soluble residue was essentially a silica precipitate in the form of many gray flakes. The specific gravity of the crust was evaluated at 3.8. In the internal yellow core the amount of manganese is about 2.39% MnO2. Due to the light color it is judged to probably be in the form of Mn2O3. |
| title | Description of the fossil manganese nodules found in the Oligocene clay deposits of Moravia, Brno area, Czech Republic |
| topic | Comment; Deposit type; DEPTH, sediment/rock; Description; Geologic age name; Identification; Krizanovice_R; Krizanovice, Czech Republic; Manganese; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; PROFILE; Profile sampling; Quantity of deposit; Sediment type; Size; Substrate type; Visual description; Wet chemistry |
| url | https://doi.org/10.1594/PANGAEA.858742 |