Carisa Mine (Carissa Mine; Clarissa Mine), Mammoth, Tintic Mining District, Juab County, Utah, USAi

Regional Level Types
Carisa Mine (Carissa Mine; Clarissa Mine)	Mine (Abandoned)
Mammoth	Town (Historical)
Tintic Mining District	Mining District
Juab County	County
Utah	State
USA	Country

Location and Description

The Carisa Mine is located on the southeastern slopes of Mammoth peak. The mine is at an altitude of 7,530 feet and is opened by an 800 foot deep shaft with 9 levels, with the bottom of the shaft having knee deep water. On the 700 foot level a long tunnel known as the Sioux Ajax tunnel, connects to the Northern Spy mine just to the north of the Carisa mine. Both the Carisa and Northern Spy mines were operated and owned by the Carisa (Mining?) Company. Their dividends amounted to $60,000 (period values). Both properties yielded Pb, Ag, Au, and Cu. Although both the Carisa and Northern Spy mines were right next to each other, they are in separate counties, the boundary line cuts between them right through the middle, resulting with the Carisa mine being in Juab county, and the Northern Spy being in Utah county.

Workings and Ore

Shallow copper ore workings were opened up on the north end of the property near the Northern Spy boundary line. The main ore body was mined down to level 7, and follows a fissure that trends north 20° east. The ore shoot is vertical at the surface then on level 9 (800 foot level), it pitches 45°-60° south, where it crossed the Boss Tweed and Victor boundaries. Above the 250 foot level, the ore shoot was only 3 feet wide, but south of the shaft where the two fissures meet, it widened to 30 feet. The ore shoot had a length of 500 feet , and was at most, 50 feet wide.

Oxidation of the ore body was complete down to a depth of 100 feet. The ore was silacious, with gold, silver, and copper valued at $60 a ton. It also contained areas of unoxidized enargite. Some of the richer ore contained 3-4 ounces of gold, and 25 ounces of silver a ton, with it being about 10% copper. The ore also contained a little argentiferous galena, although the copper ores largely predominated. The outside walls of the ore shoot was rich in copper ore, but the inside 20 feet was nearly pure baryte.

Geology

The workings are contained in the Bluebell dolomite, and possibly the Gardner dolomite, with the rock being partially marbleized. A few hundered feet east of the shaft. An irregular mass of monzonite is contained in the Bluebell dolomite , which is strongly and irregularly marbleized along the contact. The monzonite had no special effect on the mineralization near or along the contact. The monzonite contains finely distributed pyrite, and along the contact on level 4, there is some mineralization of oxidized minerals of iron and manganese, in a considerable quantity. This same material assays to a maximum of 2 ounces of silver, and 40 cents in gold per ton.

Other Regions, Features and Areas containing this locality

References