El Quemado Pegmatite, El Quemado District, Nevados de Palermo, Salta, Argentina

• Display
  • Standard
  • Detailed
  • By Strunz Category
  • By Dana Category
• Photos
  • Add Photo
• Search
  • Mineral Search
  • Search Google

Pegmatita El Quemado, Distrito de El Quemado, Nevados de Palermo, Salta, Argentina

This pegmatite 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 "El Quemado". In this case, 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

Amblygonite 'Apatite' Beryl Bismite Bismuth Bismuthinite

Bismutite Emplectite Fluornatromicrolite Hodrušite Ingodite 'Joséite-A'

'Joséite-B' Microlite Group Muscovite Pyrite Quartz Spodumene

Tetradymite Triphylite Zircon

21 entries listed. 18 valid minerals.

References