Nevada was home to a lot of mining activity from the very beginning. Archeologists have found Indian artifacts made from mined minerals dating back ten thousand years, or more. Between the fourth and sixth centuries, the Anasazi mined turquoise and salt in what is now Clark County. In 1849, Mormons travelling west discovered gold near Carson River, and in 1856, other Mormons found lead deposits near Old Las Vegas.
1861 to 1889 were especially productive years, with lead, zinc, copper, tungsten, and iron being mined along with gold and silver.
The 20th century had several active and passive periods, but is distinguished by the beginning of petroleum production. The general trend was to develop mines that would serve Nevada’s growing population, so, the focus was more on industrial minerals than gold and silver.
Information from http://www.nbmg.unr.edu/dox/nl/nl20.htm. Images from Google.