Stockwell Mine, Slate summit, Slate Range Mining District (Arondo Mining District), Slate Range, Inyo County, California, USAi

Regional Level Types
Stockwell Mine	Mine
Slate summit	- not defined -
Slate Range Mining District (Arondo Mining District)	Mining District
Slate Range	Mountain Range
Inyo County	County
California	State
USA	Country

A former Au-Ag-Pb-Cu mine located in secs. 17 & 18, T24S, R44E, MDM, 11.0 km (6.9 miles) SSE of Slate summit, and 7.1 km (4.4 miles) ENE of Valley Wells (Searles Valley) (7.5 miles NE of Pioneer Point). Discovered in 1897. Property consists of 7 unpatented claims in the mine area, and 40 acres of patented land. MRDS database stated accuracy for this location is 1,000 meters. UTM accurate. Land unsurveyed, location projected.

NOTE: USGS MRDS database file #10036096 references MRDS file #10159524 as a second relevent file. That file presents T&R data of sec. 34, T23S, R44E, MDM. File #10036096 presents T&R data of secs. 17 & 18, T24S, R44E, MDM. The topo map reflects the Stockwell Mine by name in sec. 17, T24S, R44E, MDM. The T&R data present in file #10159524 is considered to be in error.

Mineralization is a vein deposit with veins 3 to 30 feet thick, hosted in granite and monzonite. The ore body forms pockets, strikes N20W and dips 60NE at a thickness of 9.14 meters. The maximum thickness of the ore is 12 feet. Vein filling is comprised of talc, crushed quartz and altered wall rock. Controls for ore emplacement included a shear zone. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include a crosscut E 136 feet to the vein; a drift N 240 feet to a 200 foot vertical shaft, from surface which it interesects at the 50 foot level. On the 200 foot level of the shaft, a 32 foot crosscut was driven to the footwall of the vein. A drift S 574 feet from the cross cut was driven on the tunnel level. At 510 feet from the crosscut, the drift intersects an inclined shaft from surface. This shaft is sunk on a 60 degree inclination for 260 feet. The tunnel level is 120 feet below surface. An ore shoot begins some 50 feet S of this shaft and appears to extend N some 170 feet, varying in width from 3 to 12 feet, on the tunnel level. It was approximately 200 feet N from this shoot to another similar one reported to be 200 feet long. On the 170 foot level of the inclined shaft, a drift was driven N about 60 feet to a hole raise from the 210 level. On the 210 foot level, a drift was driven N about 280 feet, and S 30 feet. The N drift picked up the S shoot showing some sulfides. On the 260 foot level, a drift was driven N 90 feet. At 127 feet S of the crosscut, a winze was sunk to a vertical depth of 100 feet, developing 6 feet of ore. About 1000 feet N of these workings, and in the next canyon, a vertical shaft was sunk 150 feet. It was reported that on the 150 level, a drift was driven NW 140 feet and a crosscut from the face NE, with a drift from the crosscut SE, a total of 400 feet on this level. Several short tunnels and open cuts have been made in this canyon. These woprkings show a vein on each side of a monzonite dike which is about 10 feet wide. Some 750 feet W of this canyon several tunnels have been driven, one of which is about 700 feet long. This work was done on a vein with a strike of N70W, which appears to form a junction with the veins previously mentioned. A millsite was established in the canyon.

Production data are found in: Norman, L.A. & Richard M. Stewart (1951); and in Tucker, W. Burling & Reid J. Sampson (1938).

Production statistics (Au ore): Year: 1937: ^$25/ton Au (period values) plus 2% Cu (figures estimated).

No other production record was found.

Other Databases

Link to USGS MRDS:	10036096

Other Regions, Features and Areas containing this locality

References