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Pulacayo Mine (Huanchaca mine), Huanchaca, Antonio Quijarro Province, Potosí Department, Bolivia

Sometimes called Huanchaca Mine, although strictly speaking Huanchaca was the neighboring settlement where the ore beneficiation plant was located. Located 20km ENE of town of Uyuni. Most veins, including the Veta San Tomas, Veta Corpus, Veta Pacamayo, Veta Animas, are emplaced in propylitized, sericitized, silicified and pyritized portions of a 4km wide dacitic stock. The Veta Tajo cuts the silicified and pyritized red clay country rock. Discovered in 1833. Workings reached 1,100m below the surface, and became increasingly difficult due to the eruption of copious underground hot springs with 60 degree C water and large quantities of carbon dioxide gas. By the 1990s most of the underground workings had been abandoned and only a small amount of gypsum was being produced, and some reworking of the vast old dump material.



References:
- Dana 7:I: 380, 435
- Rocks & Min.: 17:129
- Min.Rec.: 32:477.
- Econ Geol (1993) 88:697-700
- Sillitoe, R.H., Steele, G.B., Thompson, J.F.H., and Lang, J.R. (1998): Advanced argillic lithocaps in the Bolivian tin-silver belt. Mineralium Deposita 33, 539-546.





Map Reference: 20°23'21"S , 66°41'53"W

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Mineral List:
Alunite
Andorite
Anhydrite
Aragonite
Arsenolite
Arsenopyrite
Augite
Baryte
Biotite
Boulangerite
Bournonite
Calcite
'Chalcedony'
Chalcopyrite
Chalcostibite
'Chlorite Group'
Copper
Diaphorite
Enargite
Freibergite
Galena
Geocronite
Gypsum
Jamesonite
Jarosite
Kaolinite
Lammerite
Magnetite
Marcasite
Metastibnite
Miargyrite
Pyrargyrite
Pyrite
Pyrophyllite
Quartz
var: Amethyst
Semseyite
'Sericite'
Silver
Sphalerite
Stephanite
Stibnite
Tennantite
Tetrahedrite
Wavellite
Wurtzite
Zinkenite


47 entries listed. 41 valid minerals.

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