Record details

Title
    Sangu garnet deposit, Eastern Province, Zambia
Statement of responsibility
    Antonín V. Seifert, Stanislav Vrána
Author
    Seifert, Antonín V.
    Vrána, Stanislav
Language
    anglicky
Source title - serial
    Bulletin of geosciences
Vol./nr.
    Vol. 78, no. 1
Pages
    p. 3-8
Year
    2003
Notes
    1 obr., 4 fot., 4 tab., 20 bibl.
    il.
    Zkr. název ser.: Bull. Geosci.
Subject group
    almandin
    drahokamy
    gemologie
    kontrola geochemická
    kontrola litologická
    ložisko granátů
    produkce
    pyrop
    těžba
Geographical name
    Sangu (Zambie)
    Zambie
Keyword
    Deposit
    Eastern
    Garnet
    Province
    Sangu
    Zambia
Abstract (in english)
   Gem-quality garnet at the Sangu deposit occurs in plagioclase segregation veins confined to mafic granulite, as nodular crystals up to 10 cm in diameter. The colour is commonly red to brownish red in transmitted light, with a moderate brown hue. Faceted stones up to two-carats size have a pleasant strong red colour in incident light, but larger pieces show typically dark tone. Sangu garnet is pyrope-almandine with 46-47 mol per cent Prp, 39-40 mol per cent Alm, 9-10 mol per cent Grs, 2-3 mol per cent Adr, and 0.10 wt per cent TiO2. Indices of refraction are 1.7597-1.7632 and specific gravity ranges from 3.87 to 3.94. This garnet is characterized by the presence of abundant acicular rutile crystals. Mine production primarily consists of fractured pieces 1-3 cm in size, 0.5-2 grams in weight
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    27. 9. 2007
Import date
    8. 8. 2012