Podrobnosti záznamu

Název
    Intrusion-related gold deposits associated with tungsten-tin provinces
Údaj o odpovědnosti
    J.F.H. Thompson, R. H. Sillitoe, T. Baker, J.R. Lang, J. K. Mortensen
Autor
    Baker, T.
    Lang, J. R.
    Mortensen, J. K.
    Sillitoe, R. H.
    Thompson, J. F. H.
Jazyk
    anglicky
Zdrojový dokument - seriál
    Mineralium Deposita
Svazek/č.
    Vol. 34, no. 4
Strany
    p. 323-334
Rok
    1999
Poznámky
    6 obr., 1 tab., 3 s.bibl.
    Zkr. název ser.: Mineralium Depos. (Berlin).
Předmětová skupina
    granitoidy
    hloubka vzniku ložiska
    inkluze fluidní
    metalogeneze
    provincie metalogenetická
    rudy Au
    rudy Sn
    rudy W
    středočeský pluton
    žíla rudní
Geografické jméno
    Austrálie
    Bolívie
    ČR-Čechy
    Kazachstán
    Mokrsko (Příbram)
    Španělsko
    USA-Alaska
Klíčové slovo
    Associated
    Deposits
    Gold
    Intrusion-related
    Provinces
    Tungsten-tin
Abstrakt (anglicky)
   An under-recognized and economically important class of intrusion-related gold deposits, which occur within magmatic provinces best known for tungsten and/or tin mineralization, is described with reference to seven major deposits (Fort Knox, Mokrsko, Salave, Vasilkovskoe, Timbarra, Kidston and Kori Kollo). These gold deposits contain a metal suite that includes some combination of bismuth, tungstein, arsenic, tin, molybdenum, telluriium and antimony, and contrasts with that found in the more widely-developed gold-rich porphyry copper and related deposits. The gold deposits associated with tungsten and/or tin provinces are located in cratonic margins, in a landward or back-arc position relative to continental margin ares (where recognized), or within continental collision settings. The deposits are related genetically to felsic domes. stocks or plutons of intermediate oxidation state, both magnetite- and ilmenite-series magmas are represented.
   The intrusion-hosted gold deposits are most commonly of sheeted vein/veinlet type, although greisen-like, disseminated and breccia deposits are also described. Gold may also be concentrated more distally (1-3km) with respect to the intrusions, where deposits may be of skarn, disseminated replacement or vein types. K-feldspar, albite and/or sericitic alteration assemblages, commonly including carbonate, accompany the gold mineralization. In sheeted vein deposits, alteration is normally restricted to narrow envelopes around veins, whereas more pervasive alteration occurs in greisen-like, disseminated and shallow (<3 km) deposits. The gold mineralization is commonly present with low total sulphide contents (< 3 perc.) mainly pyrite and lesser arsenopyrite. In several deposits, bismuth minerals are closely associated with gold, and bismuth-gold and tellurium-gold correlations exist.
   Most deposits contain tungsten, tin, molybdenum and antimony, although generally these do not correlate with gold; tungsten and molybdenum concentrations may increase with depth or may occur in separate
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    14. 2. 2008
Datum importu
    8. 8. 2012