Psax
Joined: 20 Feb 2015
Posts: 28
Location: Pribram
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Posted: Feb 20, 2015 06:10 Post subject: Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic |
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gps: 49.675897, 14.056016
The area where the stones were found is near mineshaft n.16, Haje, Pribram, which is part of Central-Bohemian Pluton.
Ore vein filling contains almost 90 minerals, mainly calcite, along with quartz, uranium, uranium-anthraxolite, galena, sphalerite, et al.
Majoriarian mineral of this whole area is coarse-grained biotite-granite with amphibole, and granodiorite. And also greywacke, siltstone and slate.
Mineshaft n.16 was in use in years 1957-1991 and was denoted as the deepest mineshaft in Europe. It's depth in 1975 was 1838,5 m. (part of shaft was also this long ladder..)
Drifts length is 45km.
The spoil bank, which I visited, is partially processed in nearby concentrator "1.May" (the name is remembrance of communist history today), so minerals are quite still moving and giving a little chance to mineralogists: Location is remarkable for secondary uranium minerals, sulfides, calcite crystals and so on.
Collection Options: Favourable
But collecting ore minerals (there are not so many to be found) need luck. Collection of uranium minerals, including secondary uranium minerals, without the necessary equipment has almost no possibility of success.
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Description: |
Partially processed spoil bank. |
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Viewed: |
10377 Time(s) |
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Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Description: |
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Viewed: |
10496 Time(s) |
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Mineral: | Calcite |
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Dimensions: | 8 x 12 cm |
Description: |
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10396 Time(s) |
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Mineral: | Calcite |
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Dimensions: | 4 x 6 cm |
Description: |
Another calcite, one of most frequently observed minerals |
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10450 Time(s) |
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Mineral: | Stibarsen |
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Dimensions: | 4 x 5 cm |
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... or is it Uranitite instead? |
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10448 Time(s) |
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Mineral: | Unknown |
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Dimensions: | 16 x 26 cm |
Description: |
Please, feel free to identify. |
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10441 Time(s) |
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Mineral: | Calcite and amphibole |
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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Dimensions: | 15 x 30 cm |
Description: |
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Viewed: |
10452 Time(s) |
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_________________ respectfully
Pavel Smejkal
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Pribram, uranium district, Czech republic |
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Psax
Joined: 20 Feb 2015
Posts: 28
Location: Pribram
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Posted: Feb 25, 2015 12:08 Post subject: Re: Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic |
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Well... my father kindly tested stone which I named stibarsen (look up to gallery) with IT-65 Czechoslovak army Geiger counter, which measure out 6 mR/h. Stibarsen appears to be uraninite, I think.
What is your opinion?
Locality: | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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10199 Time(s) |
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_________________ respectfully
Pavel Smejkal
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Pribram, uranium district, Czech republic |
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Adrian Pripoae
Joined: 30 May 2014
Posts: 38
Location: Calgary
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Posted: Feb 25, 2015 13:36 Post subject: Re: Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic |
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Hello Pavel
Back in the eighties I worked for a 5 years, as a geologist in uranium mining and exploration. The paragenisis from Pribram is somehow different of the ones I am accustomed but i think that if that black colloidal deposit would be pure uraninite the radiation count would be much higher. The high radioactive count would suggest that you have some (more or less) radioactive content in the sample but the value sugges that this material is somehow disseminated. What about the density of the specimen - uraninite has a density between 7-11 g/cmc. Best way to find out is to get it analysed. Any way for your own good I hope that you are aware that this specimen is dangerous and you have taken all measures to protect yourself and the environment.
Best of luck in your endeavors.
Adrian Pripoae
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