The impetus to the town's growth came in the 1920s when mineral deposits, such as gold, copper, and molybdenite, were found in the area.
en.wikipedia.org Before it was a national park the land was mined for molybdenite, arsenic, tungsten, copper, gold and tin.
en.wikipedia.org It occurs associated with cassiterite, arsenopyrite, molybdenite, tourmaline, topaz, rhodochrosite and fluorite.
en.wikipedia.org Minerals found in association with powellite include molybdenite, ferrimolybdite, stilbite, laumontite and apophyllite.
en.wikipedia.org Molybdenite concentrates are roasted to form molybdic oxide, which can be converted into ferromolybdenum, molybdenum chemicals, or molybdenum metal.
en.wikipedia.org