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Título del libro: Mineral Resources In A Sustainable World, Vols 1-5 Título del capítulo: Mineralogical Characterization of Sn Deposits from the Santa Fe District, Bolivia
Autores UNAM: CARLOS CANET MIQUEL;
Autores externos: Idioma: Año de publicación: 2015Palabras clave:
Tin; sulfosalts; stannite; indium; Bolivia
Resumen:
The Sn-Zn-Pb-Ag Japo-Santa Fe-Morococala ore deposit is located in the
Central Andean Belt province. The ore mineralization is hosted in a
Paleozoic metasedimentary sequence and porphyritic Oligocene-Miocene
igneous rocks. Ore minerals occur in veins and disseminations. Two types
of ore mineralization are distinghished: (1) An early Sn mineralization
and (2) a late Sn and Zn-Pb-Ag mineralization. Mineral association
consists mainly of quartz, pyrite, cassiterite, other sulfides and
sulfosalts. Cassiterite, up to 0.25 wt% In, constitutes the earliest
mineralization. Galena and sphalerite are the main sulphide minerals.
Sphalerite shows up 0.24 wt% In. Stannite group is represented by
stannoidite, kesterite, and sulfides of the Sn-Cu-Zn-Fe-S system.
Sulfosalts include sakuraiite, potosiite, franckeite, freibergite,
tetrahedrite, myargyrite, boulangerite, jamesonite, zinckenite,
cylindrite and andorite. In this deposit, after an epigenetic magmatic
stage, a long greisen-hydrothermal event took place with several
episodes of metal deposition.
