The Garfield district is 10 miles northwest of Mina and 25 miles southeast of Hawthorne, just north of a line connecting Hawthorne and Mina.
Silver-gold ore was discovered here in 1882, and in the early days several millions of dollars worth of ore was produced from the principal mine, the Garfield. In later years, the Mabel mine has been an important producer.
Early production of the district is estimated at several million dollars in combined metals (Vanderburg, 1937b, p. 33). Production of gold from 1903 through 1957 was 4,933 ounces. Total gold production of the district through 1959 was probably between 10,000 and 50,000 ounces.
The ore deposits are in quartz veins (?) in volcanic rocks of the Excelsior Formation of Triassic and possible Permian ages and limestone of the Luning Formation of Triassic age (Ross, 1961, p. 82).
GOLD RANGE DISTRICT
The Gold Range (Silver Star, Camp Douglas) district is in the Excelsior Mountains in southern Mineral County, about 7 miles northeast of Mina.
In 1893 veins containing gold and silver were discovered and about $500,000 was produced in the first 10 years (Vanderburg, 1937b, p. 71). Small-scale production continued to 1934, when the increased price of gold caused a noticeable spurt in activity. In 1910 tungsten was discovered in the district.
Total gold production for the district through 1959 was about 97,000 ounces. No activity was reported from the district from 1948 through 1959.
The deposits of the Gold Range district are in veins that branch out from two major faults with a horst between them (Ferguson and others, 1954). Veins on the north fault produced only gold and a little scheelite; veins of the south fault, the Silver Dyke system, were rich in silver and carried only small amounts of gold, and scheelite was encountered at depth. The veins are probably of Pliocene age. Most of the veins are in the Excelsior Formation (Triassic) and the Dunlap Formation (Jurassic) ; a few cut some Tertiary rhyolite, The major constituents of the auriferous veins are free gold and pyrite with comb quartz and some adularia.
The Hawthorne district, near the town of Hawthorne at the south end of Walker Lake, is predominantly a silver district, but it has produced considerable gold as a byproduct.
Mining began at least as early as the 1880's at the Pamlico and LaPanta mines, which are 10 miles east-southeast of the town of Hawthorne but are included in the Hawthorne district. Hill (1915, p. 157) reported an estimated $200,000 worth of production from the LaPanta and about $500,000 from the Pamlico. The amount of gold represented in his production was not given. Vanderburg (1937b, p. 38) reported $300,000 production, mostly in gold, from the LaPanta. In 1906 the Lucky Boy mine was discovered and became the chief producer for a few years, but production from the entire district decreased in recent years.
Vanderburg (1937b, p. 36) listed yearly production from 1904 through 1935â€”a total of 155 ounces of placer gold and 4,700 ounces of byproduct gold was produced. From 1936 through 1959, a total of 5,067 ounces of gold was mined in the district.
Hill (1915, p. 151-155) described the geology in the vicinity of the Lucky Boy mine. Cherty limestones, shales, and sandstones of probable Mesozoic age were faulted and intruded by a granodiorite mass which was later cut by aplitic and basic dikes. Near the intrusion the limestones were metamorphosed, producing a skarn of garnet, tremolite, diopside, quartz, and calcite. The vein at the Lucky Boy is in a fracture that cuts the limestone and granodiorite. The average width of the vein is 2 to 31/2 feet. Ore consists of fine-grained galena and tetrahedrite and a little pyrite. High-grade ore carries 2,000 to 3,000 ounces of silver per ton, and medium-grade ore carries 50 to 400 ounces of silver to the ton.
Page 3 of 4