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Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province (Bustillos Province), Potosí Department, Bolivia

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Latitude & Longitude (WGS84): 18° 25' 0'' South , 66° 37' 60'' West
Latitude & Longitude (decimal): -18.4166666667, -66.6333333333


The name "Siglo Veinte", often also written "Siglo XX", means "Twentieth Century" and was given because serious mining of the tin ores began at the beginning of the century in 1901.
The mine is easily reached from Llallagua, a few minutes walk southwest from the city center.

Mineral List

'Albite-Anorthite Series'

Allophane

Alunite

'Andorite'

Anglesite

Antlerite

Arsenic

Arsenopyrite

Augelite

Azurite

Baryte

'Biotite'

Bismite

Bismoclite

Bismuth

Bismuthinite

Bismutite ?

Bornite

Boulangerite

Bournonite

Brochantite ?

Caledonite

Cassiterite

var: Wood Tin ?

Cervantite

Chalcanthite

Chalcocite

Chalcopyrite

Chalcosiderite

Childrenite

Chlorapatite

Chrysocolla

Cookeite

Copper

Cordierite

Covellite

Crandallite

Creedite

Cronstedtite

Cuprite

Cylindrite

Diadochite

Dravite

Epsomite

Evansite

Faustite

Ferberite

Ferrivauxite (TL)

Florencite-(Ce)

Fluorapatite

Franckeite

var: Potosíite ?

Galena

Goethite

Goyazite

Greenockite

Gypsum

Hagendorfite

Halite ?

Halotrichite

Hematite

Hinsdalite

Hisingerite

'Hornblende'

Hübnerite

Jamesonite

Jarosite

Jeanbandyite (TL)

Kaolinite

Linarite

Malachite

Marcasite

Melanterite

Mélonjosephite

Metavauxite (TL)

Miargyrite ?

'Monazite'

Monazite-(Ce)

Monazite-(La)

Muscovite

var: Sericite

Nacrite

Natanite

Opal

Orpiment

Orthoclase

Paravauxite (TL)

Phosphophyllite

Pickeringite

Plumbogummite

Pyrargyrite

Pyrite

Pyromorphite

Pyrrhotite

Quartz

'Quartz-beta'

Realgar

'Rhabdophane'

Rhodochrosite

Rockbridgeite

Römerite

Rutile

Scheelite

Siderite

Sigloite (TL)

'Silesite'

Silver

Sphalerite

var: Gumucionite

Stannite

Stibnite

Sulphur

Tenorite

Tetradymite ?

Tetrahedrite

Thorite ?

'Tourmaline'

Troilite

Tungstite

Variscite

Vauxite (TL)

Vivianite

Wavellite

Wickmanite

Wurtzite

Xenotime-(Y)

Zinkenite ?

Zircon


111 valid minerals. 6 (TL) - type locality of valid minerals. 4 erroneous literature entries.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

American Mineralogist (1922): 7: 107-108.

Samoyloff, V. (1934): The Llallagua-Uncia tin deposit [Bolivia]
Economic Geology. 29:481-499

Gordon, S.G. (1939): Thorium-free monazite from Llallagua, Bolivia. Academy of Natural Science, Philadelphia. 96: 279-359

Gordon, S.G. (1939):Greenockite from Llallagua, Bolivia, Notulae Naturae of Academy of Natural Science, Philadelphia No 1, 5 pages

Samuel G. Gordon (1944): The Mineralogy of the Tin Mines of Cerro de Llallagua, Bolivia. Proceedings of the Academy of Natural Sciences of Philadelphia. Vol. 96, pp. 279-359

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 938, 963, 972, 973, 975.

F. G. Smith, S. K. DasGupta and V. G. Hill (1957): Manganoan ferroan wurtzite from Llallagua, Bolivia (I). Canadian Mineralogist, v. 6 no. 1 p. 128-135

Hurlbut C S, Honea R (1962) Sigloite, a new mineral from Llallagua, Bolivia, American Mineralogist, 47, 1-8

Kampf, A. R. (1982): Jeanbandyite a new member of the stottite group from Llallagua, Bolivia. Mineralogical Record 13 (4), 235-239.

Mining Annual Review (1985): 337.

K. A. Rodgers, H. W. Kobe, C. W. Childs (1993): Characterization of vivianite from Catavi, Llallagua Bolivia, Mineralogy and Petrology Volume 47, Issue 2, pp 193-208

Petrov, A. & Sith B & C. (2001): A guide to Mineral Localities in Bolivia. Mineralogical Record. 32, 457-482 (p. 474).

Hyrsl, J. & A. Petrov (2006): Famous Mineral Localities: Llallagua, Bolivia. Mineralogical Record 37, 117-162.

Rakovan, J., and Reeder, R.J. (1994) Differential incorporation of trace elements and dissymmetrization in apatite: The role of surface structure during growth. American Mineralogist, 79, 892-903.

Rakovan, J., and Reeder, R.J. (1996) Intracrystalline Rare Earth Element distributions in apatite: Surface structural influences on zoning during Growth. Geochim. Cosmochim. Acta, 60, 4435-4445.

Rakovan, J., McDaniel, D.K., and Reeder R.J. (1997) Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal Sm-Nd age. Earth and Planetary Science Letters,146, 329-336.

Rakovan, J., M. Newville and S. Sutton (2001) Evidence of heterovalent europium in zoned Llallagua apatite using wavelength dispersive. American Mineralogist, 86, 697-700.

Rakovan, J. (2003) Exceptional Apatites from the Siglo XX mine, Llallagua Bolivia. Tucson Mineralogical Symposium. Mineralogical Record 34, 117-118.

Raade, G., Grice, J.D., Rowe, R. (2016): Ferrivauxite, a new phosphate mineral from Llallagua, Bolivia. Mineralogical Magazine, 80, 311-324

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