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Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic
  
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Psax




Joined: 20 Feb 2015
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PostPosted: Feb 20, 2015 06:10    Post subject: Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic  

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.



IMG_9949.jpg
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Description:
Partially processed spoil bank.
 Viewed:  10314 Time(s)

IMG_9949.jpg



IMG_0004.jpg
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Description:
Mineshaft n.16 headframe
 Viewed:  10433 Time(s)

IMG_0004.jpg



IMG_9965.jpg
 Mineral: Calcite
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Dimensions: 8 x 12 cm
 Description:
Calcite with Manganese
 Viewed:  10335 Time(s)

IMG_9965.jpg



IMG_0073.jpg
 Mineral: Calcite
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Dimensions: 4 x 6 cm
 Description:
Another calcite, one of most frequently observed minerals
 Viewed:  10388 Time(s)

IMG_0073.jpg



IMG_0234.jpg
 Mineral: Stibarsen
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Dimensions: 4 x 5 cm
 Description:
... or is it Uranitite instead?
 Viewed:  10387 Time(s)

IMG_0234.jpg



IMG_9961.jpg
 Mineral: Unknown
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Dimensions: 16 x 26 cm
 Description:
Please, feel free to identify.
 Viewed:  10381 Time(s)

IMG_9961.jpg



IMG_9979.jpg
 Mineral: Calcite and amphibole
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Dimensions: 15 x 30 cm
 Description:
 Viewed:  10391 Time(s)

IMG_9979.jpg



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Pavel Smejkal
________________________
Pribram, uranium district, Czech republic
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Psax




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Location: Pribram


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PostPosted: Feb 25, 2015 12:08    Post subject: Re: Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic  

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?



measurement.jpg
 Locality:
Příbram, Central Bohemia Region, Bohemia, Czech Republic
 Description:
 Viewed:  10136 Time(s)

measurement.jpg



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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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PostPosted: Feb 25, 2015 13:36    Post subject: Re: Spoil bank of former uranium mine, Mineshaft n.16, Haje, Pribram, Czech Republic  

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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