add to table of contents mineral id labpage 26 miningpage 27
TRANSCRIPT
Ores - mineral deposits in the earth’s crust that contain a desired material. 1. Metals or nonmetals. 2. Must be present in high enough quantities to make its removal profitable. 3. Ore refining= removing these wanted products from the ore.
Mining began in Nevada on the heels of the California gold rush in 1849 before Nevada was even a state. The major discovery of silver, known as the Comstock Lode, happened a decade later in 1859 and brought great changes to the area as miners rushed into the region and boom towns including Virginia City, Aurora, Unionville and Austin were born. Over the next 20 years, almost $1 billion of gold and silver were produced by Nevada mines. The wealth of Nevada mines, the population surge they created and the ongoing American Civil War prompted Abraham Lincoln to declare Nevada the 36th state in the Union on Oct. 31, 1864.
• USA is the #2 goldProducer in the world
• Nevada produces85% of the gold fromNorth America.
But, the most common mining product in the USA is gravel.
• Barite-paints,• plastic• Silica- sand, glass• Limestone-Cement• Diatomite- insect• killer• Mercury-makes
Thimerosal in
tattoo ink and mascara
Gypsum1. Blue Diamond Mine-> 2. Dig it out of the ground-> 3. Taken to building to be powdered(refined)-> 4. truck to Pabco plant at Lake Mead to be made into drywall and stucco.