Phoenix is a skarn-hosted polymetallic massive sulfide replacement deposit.

Au-Cu-Ag-Pb-Zn skarn mineralization at Phoenix is centered about the Eocene Copper Canyon granodiorite porphyry stock. Paleozoic sedimentary rocks within two miles of the stock have undergone strong thermal metamorphism (hornfels) and metasomatism (skarn). Metal zonation is manifest by a CuMo core close to the stock grading outward into proximal Cu-Au-Ag, Au-Ag and distal Pb-Zn-Ag mineralization.

The Lone Tree gold deposit, Nevada is hosted in Paleozoic calcareous sedimentary rocks. Mineralization is dominantly controlled by high-angle normal faults and fracture sets, as is alteration. Mineralization occurs in the form of disseminations, micro and macro veins, and as a matrix to angular breccia clasts. The paragenesis of minerals indicate four stages of mineralization. The first stage is identified by brecciated quartz and minor pyrite. The second stage is the main gold stage of mineralization comprising quartz veins, kaolinite, pyrite, marcasite, arsenopyrite, gold, sphalerite, and chalcopyrite.This is overprinted by a third stage economic gold mineralization along with barite and pyrite. Free gold grains in stage 2 occur in a quartz and clay mineral assemblage in association with pyrite. The last stage is supergene mineralization producing covellite, chalcocite, native copper, hematite, and goethite.

Main alteration types are decarbonatization, silicification by multiple generations of silica, and argillization due to the development of kaolinite, illite/smectite, and alunite.

Gold mineralization at the Lone Tree deposit is primarily confined to fault zones and fracture sets, where sedimentary host rocks experienced decarbonatization, silicification (by repeated introduction of hydrothermal silica), and argillization (by development of clay minerals especially hypogene kaolinite).

Phoenix is an open pit operation, located approximately 10 miles south of Battle Mountain, Nevada and can be accessed by paved highway to a Newmont maintained dirt road. The Phoenix surface mine’s available mining fleet consists of three shovels and twenty 240 ton haul trucks.

Lone Tree is an open pit operation, located approximately 20 miles northwest of Battle Mountain, Nevada and can be accessed by paved highway. Lone Tree’s available mining fleet consists of two haul trucks, which range from 150 tons to 190 tons, to rehandle leach material for residual leaching operations.

The Phoenix Mine is located in Lander County, Nevada approximately 12 miles to the southwest of the community of Battle Mountain via Interstate Highway 80 and Nevada State Highway 306. It includes the Phoenix, Midas, Reona, and Iron Canyon open pits and excavation of the existing Northeast Extension, Tomboy, Midas, and Fortitude gold ore stockpiles.

The Phoenix Mill, constructed in 2005, is designed for the beneficiation of 35,000 tons per day of run-of-mine grade ores from the mining operations. Gold, silver, and copper are recovered by:
(1) coarse gold recovery by gravity separation;
(2) two-stage flotation to produce a copper sulfide concentrate for offsite processing;
(3) further processing of the flotation tailings using a carbon-in-pulp leach (CIP) circuit for additional gold and silver recovery.

Gravity concentrates are diverted to an intensive cyanidation unit (ICU) for gold recovery. Cyanide and lime are added to the CIP leach tanks for pre ........