Before it was a national park the land was mined for molybdenite, arsenic, tungsten, copper, gold and tin.
12.
It is a silvery black solid that occurs as the mineral molybdenite, the principal ore for molybdenum . is relatively unreactive.
13.
In 1913, Frank E . Elmore developed a froth flotation process to recover molybdenite from ores; flotation remains the primary isolation process.
14.
More sensitive molybdenite receiver cells, which also had greater sensitivity to infra-red radiation, replaced the older selenium cells in 1917.
15.
A molybdenite porphyry, which includes gold at 0.04 ounces per ton, and silver at 7.07 ounces per ton.
16.
The objective was to extract wolfram, molybdenite and bismuth from the lowest grade mixed-metal ore using a specially designed treatment plant.
17.
Metallic minerals identified at Pebble include pyrite, chalcopyrite, molybdenite, and bornite, along with minor covellite, chalcocite, digenite and magnetite.
18.
Rheniite has also been reported in the Pagoni Rachi Mo Cu Te Ag Au deposit in northeastern Greece where it occurs with molybdenite in quartz porphyry.
19.
The principal uranium mineral in volcanic deposits is pitchblende, which is usually associated with molybdenite and minor amounts of lead, tin and tungsten mineralization.
20.
The ore is treated by froth flotation to obtain molybdenite concentrate, which is shipped to a plant in Fort Madison, Iowa for further processing.
