Juniper Mine, Antelope Springs Mining District, Pershing County, Nevada, USAi

Regional Level Types
Juniper Mine	Mine
Antelope Springs Mining District	Mining District
Pershing County	County
Nevada	State
USA	Country

Sec. 32, T27N, R34E, MDM.

The Juniper (aka Nevada Quicksilver) mine was one of the larger producers in the constellation of cinnabar occurrences scattered around the periphery of the large silver – gold producing area at Nenzel hill in Rochester. Cinnabar, along with scattered concentrations of stibnite, was localized by fracture breccias in limestone. The orebodies are closely overlain by a black shale.

The mine was worked through a 45 degree inclined shaft. Bailey and Phoenix (1944) reported that there were 2 stopes and a mile of drifts and crosscuts on several levels down to 330 feet.
Structure: Relief Fault (Thrust), N40w Trend ; Reg.Trends: N 40 W

Tectonics: Basin And Range

Deposit: The deposit is in beds of upper triassic limestone conglomerate and shale. Cinnabar occurs in limestone As very rich bunches and pods, and also formed disseminated crystals in white calcite veinlets cutting the limestone. Some of ore from upper parts of the mine contained stibnite and in the lower levels scattered pods of ore contained a higher percentage of stibnite. Both the ore bodies lay in the limestone conglomerate close beneath the contact, in places coming in direct contact with the shale. The largest ore body is localized between two intersecting steep faults. Mineralization occurs in limestone beneath shale and adjacent to a fault. The deposits are folded and faulted into n W trending ridges. South part of area is fanglomerate, north part has basalts. Discovered in 1923 by e.m. Benedict. Bought in 1927 by l.a. Friedman (nevada quicksilver company) and mine became one of the leading producers in the country during 1928-1929. Mine was leased twice between 1931 and 1942. No eort made to develop mine after 1943. The workings are in beds of upper triassic limestone conglomerate and overlying shale. A prominent easterly trending fault which offset the limestone shale contact was important in localizing the major ore body. Deposition of cinnabar occurred in other diverging steep faults. ; info.src : 1 pub lit

Deposit type: Hot-spring Hg

Development: Bought in 1927 by l.a. Friedman (nevada quicilver company) and mine became one of the leading producers in the country during 1928-29. Mine was leased twice between 1931 and 1942. No effort was made to develop mine after 1943.

Geology: Cinnabar occurred in limestone As very rich bunches and pods and also formed disseminated crystals in white calcite veinlets cutting the limestone. Some of ore from upper parts of the mine contained stibnite and in the lower levels scattered pods of ore contained a higher percentage of stibnite. Both the ore bodies lay in the limestone conglomerate close beneath the contact, in places coming in direct contact with the shale. The largest ore body is localized between two intersecting steep faults. Mineralization occurs in limestone beneath shale and adjacent to a fault the deposits are folded and faulted into n W trending ridges. South part of area is fanglomerate, north part has basalts. ; major.units: upper tri and lower jur sedimentary rocks

Rock formation(s): Diabase Dikes
Dun Glen Formation-Limestone


Ore(s): Normal Contact With Overlying Shale, Some What Faulted

Other Databases

Link to USGS MRDS:	10040306

Other Regions, Features and Areas containing this locality

References