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El Quemado District, Nevados de Palermo, Salta, Argentina
Bederite
El Peñón pegmatite, El Quemado District, Nevados de Palermo, Salta, Argentina
Photo: 2008, JGW
El Peñón pegmatite, El Quemado District, Nevados de Palermo, Salta, Argentina
Photo: 2008, JGW
Latitude: 24°47'4"S
Longitude: 66°21'43"W
Longitude: 66°21'43"W
History and mineralization:
Complex granitic pegmatites as tabular bodies up to several hundred meters long and 30m thick. Hosted in schists of the La Playa Formation, related to a trondheimite intrusion.
"El Quemado", Salta mining district:
In pegmatites of the mining district "El Quemado", with the following mines: "El Peñón", "La Elvirita", "Santa Elena" and "El Quemado". These pegmatites main minerals are quartz, plagioclase, microcline, to which is added Spodumene, Muscovite, Biotite, Beryl, Lepidolite, Tourmaline, Sphalerite, Molybdenite, Uraninite, Niobite, Tantalite, Native Bismuth, Bismuthinite, Ferrotapiolite, Manganotantalite, Microlite, Uranomicrolite, Bismuthmicrolite, Hafniferous Zircon, Triplite, Montebrasite and other phosphates and uranium oxide minerals.
Minerals of the columbite group have varying compositions: from Ferrocolumbite to Manganocolumbite and the less evolved pegmatites and Shales to Manganotantalite in "Santa Elena", "El Quemado" and "El Peñon". In these cases, Microlite, Uranomicrolite, and occasionally Bismuth-Microlite often accompany the most advanced members. Ferrocolumbite was determined by chemistry and x-ray diffraction.
The crystals are centimetric to millimetric, tabular, sub to euhedrales, with development of forms {010}, {100}, {110}, {130}, {011}, {111} in different combinations. Found in the intermediate areas, including in plagioclase, microcline or primary phosphates. Alluvial crystals are prismatic or tabular thicknesses and often have vertical striations. They are black, fragile and have metallic sheen to submetallic.
Mineral List
Mineral list contains entries from the region specified including sub-localities113 entries listed. 61 valid minerals. 1 type locality (valid mineral).
Localities in this Region
Argentina
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References
Galliski, M. A. (1983). Distrito minero El Quemado, Deptos. La Poma y Cachi, provincia de Salta. II. Geología de sus pegmatitas. Rev. Asoc. Geol. Argentina, 38, 340-380.
M. F. Marquez-Zavalía, M. A. Galliski, P. Černý, P.,R. Chapman (2010): A bismuth-rich, tellurium-bearing mineral assemblage from El Quemado granitic pegmatite, Nevados de Palermo, Salta, Argentina. Canadian Mineralogist, 48, (in press).
Márquez-Zavalía, M. F., Galliski, M. Á., Černý, P., & Chapman, R. (2012). An Assemblage Of Bismuth-Rich, Tellurium-Bearing Minerals In The El Quemado Granitic Pegmatite, Nevados De Palermo, Salta, Argentina. The Canadian Mineralogist, 50(6), 1489-1498.
M. A. Galliski y I. L. de Upton (1992). Composición y propiedades de minerales de niobio y tantalio de las pegmatitas graníticas de El Quemado, provincia de Salta. Revista de la Asociación Geológica Argentina, 47(3): 323-331.
M. A. Galliski (1983). Distrito minero El Quemado, dptos. La Poma y Cachi, provincia de Salta. II. Geología de sus pegmatitas. Revista de la Asociación Geológica Argentina, 38(3-4), 340-380.
M. A. Galliski (1999). Distrito pegmatítico El Quemado, Salta. En: Recursos Minerales de la República Argentina (Ed. E.O. Zappettini). Instituto de Geología y Recursos Minerales SEGEMAR, Anales 35: 347-350.
M. A. Galliski, M. F. Márquez-Zavalía, M. A. Cooper, P. Černý y F. C. Hawthorne (2001). Bismutotantalite from northwestern Argentina: description and crystal structure. The Canadian Mineralogist, 39: 103-110.
M. F. Marquez-Zavalía, M. A. Galliski, P. Černý, P.,R. Chapman (2010): A bismuth-rich, tellurium-bearing mineral assemblage from El Quemado granitic pegmatite, Nevados de Palermo, Salta, Argentina. Canadian Mineralogist, 48, (in press).
Márquez-Zavalía, M. F., Galliski, M. Á., Černý, P., & Chapman, R. (2012). An Assemblage Of Bismuth-Rich, Tellurium-Bearing Minerals In The El Quemado Granitic Pegmatite, Nevados De Palermo, Salta, Argentina. The Canadian Mineralogist, 50(6), 1489-1498.
M. A. Galliski y I. L. de Upton (1992). Composición y propiedades de minerales de niobio y tantalio de las pegmatitas graníticas de El Quemado, provincia de Salta. Revista de la Asociación Geológica Argentina, 47(3): 323-331.
M. A. Galliski (1983). Distrito minero El Quemado, dptos. La Poma y Cachi, provincia de Salta. II. Geología de sus pegmatitas. Revista de la Asociación Geológica Argentina, 38(3-4), 340-380.
M. A. Galliski (1999). Distrito pegmatítico El Quemado, Salta. En: Recursos Minerales de la República Argentina (Ed. E.O. Zappettini). Instituto de Geología y Recursos Minerales SEGEMAR, Anales 35: 347-350.
M. A. Galliski, M. F. Márquez-Zavalía, M. A. Cooper, P. Černý y F. C. Hawthorne (2001). Bismutotantalite from northwestern Argentina: description and crystal structure. The Canadian Mineralogist, 39: 103-110.
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