Podrobnosti záznamu

Název
    Gold and associated tellurides from the Gold hawk Mine Val d Or area, Quebec
Údaj o odpovědnosti
    Jaroslav Hak, David H. Watkinson, Peter C. Jones
Autor
    Hak, Jaroslav
    Jones, Peter C.
    Watkinson, David H.
Jazyk
    anglicky
Zdrojový dokument - seriál
    Acta Universitatis Carolinae. Geologica
Svazek/č.
    Vol. 41, no. 1
Strany
    p. 101-111
Rok
    1997
Poznámky
    3 obr., 7 fot., 4 tab., 7 bibl.
    Zkr. název ser.: Acta Univ. Carol., Geol.
Předmětová skupina
    ložisko hydrotermální
    prekambrium
    prvky ryzí
    rudy Au
    sulfidy
    telluridy
    zlato
    žíla rudní
Geografické jméno
    Kanada-Quebec
Klíčové slovo
    Area
    Associated
    Gold
    Hawk
    Mine
    Quebec
    Tellurides
    Val
Abstrakt (anglicky)
   The grain size of gold is large (1 mm to almost 2 mm); it is found free and as inclusions in almost every mineral in the ore unit. The silver content is relatively consistent (6 wt.%). Some gold occurs as tellurides, but most native. The very strong spatial relationship of gold to various teluride minerals may be helpful in locating high-grade ore zones. The minarelogy of the ore appears to be simple macroscopically, but microscopically, it is quite complex. The abundance and variety of nickel-bearing minerals attests to the interationc of the ore fluids with ultramafic rocks. From the samples examined, however, it appears that most included and partly assimilated rock fragment are basaltic; the controlling factor is the occurrence of units that may fracture in a brittle, rather than deform in a ductile manner, thus providing a locus for Au precipitation.
   The Gold Hawk deposit belongs to numerous hydrothermal low temperature vein deposits in which the appearance of tellurides after intitial deposition of sulfides reflects and increase in tellurium/sulfur fugacity ratio, perhaps due to input of H2Te from a magmatic source. Most tellurides in veins are believed to have been deposited at temperatures less than 350°C
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    21. 3. 2008
Datum importu
    8. 8. 2012