Latitude & Longitude (WGS84):
35° 23' 26'' North , 114° 11' 6'' West
Latitude & Longitude (decimal):
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Long-form identifier:
mindat:1:2:41567:6
Other/historical names associated with this locality:
Mohave-Midnight Mine
A former Cu-Ag-Au-Pb-Mo-Zn-Pyrite occurrence/mine located in the NE¼SE¼SE¼ sec. 10, and in the SW¼ sec. 11, T23N, R18W, G&SRM, 1.5 miles S of Chloride and about 2.7 miles WSW of Cherum Peak, on private land within a Bureau of Land Management administered area. The property is comprised of 7 patented claims. Discovered before 1866. Previous owners and operators include Heimrods, McDuffee and Gilleland, Darius Brown, Robert Gibson, James Boyd, John St. Charles, Keene St. Charles, Ande Brown, Holmes, and the Midnight Mohave Mining Company. Owned by W. C. Babcock, Arizona (1946). Operated by Jim Bock (1981-). Operated 1901 through 1948. The USGS MRDS database stated accuracy for this locality is 500 meters.
MIDNIGHT MINE.
The claim of the Midnight mine practically joins that of the Pinkham mine on the northwest, as shown in Plate III, and, like the Pinkham, is situated on open, gently sloping ground. (See PL VI, B.) The mine was discovered prior to 1866. The original owner was a pioneer named Carpenter, who in early times hauled some of the ore to the Mineral Park mill. Later the mine was owned by
Heimrods, McDuffee & Gilleland, and still later by the partners Darius Brown, Kobert Gibson, James Boyd, and John St. Charles. Finally, about 1898, John St. Charles and his brother Keene became the Sole owners. They alone have done most of the development, and have shipped ore from the deeper levels.
The mine is developed principally by inclined shafts, drifts, and crosscuts, and is equipped with a gasoline hoist. The main shaft is 200 feet deep, and the drifts, crosscuts, and stopes aggregate several hundred feet of workings.
The same country rocks prevail as in the Pinkham vein, being principally pressed and crushed microcline-biotite granite, and this is also intruded by the same classes of diabase and granitic dikes in or near the mine, the diabase apparently being the later of the intrusives (fig. 11). The vein or lode is less well defined than the vein in the Pinkham mine. As shown in figure 10, it strikes in general about N. 65° W. and on the southeast seems to join the Pinkham vein. It has a width of 50 to 75 feet and contains much low-grade ore. As seen in the mine, it contains two main veins or ore bodies, of which the principal or south one strikes about northwest and dips irregularly southwest at angles of 35° or more. The second vein strikes about N. 80° W. and dips steeply to the north.
A large amount of good ore is shown in the mine, but it contains much, zinc, and considerable disturbance, including lateral faulting, has taken place, by reason of which further development is needed before the structure can be worked out. The ore contains silver, copper, gold, zinc, and iron. The silver occurs mostly in chalcopyrite, the rule being the more chalcopyrite the more silver. Some bornite is present. The gold is found principally in the pyrite. The zinc blende, though more or less mixed with the ore, occurs also in a relatively pure 3-inch shoot on the hanging wall in the northeastern part of the mine.
For some years past the mine has been shipping copper ore in a small way. This ore was rich and averaged about $1,500 a ton, but some of it contained 5 or 6 per cent more of zinc than the 10 per cent allowed by the smelters and was accordingly penalized. It seems probable that by the use of a suitable magnetic separator the zinc could be extracted and profitably marketed as zinc ore. In certain parts of the mine the ore contains 30 to 40 per cent of zinc, and is so low in other values that it will be shipped as zinc ore. A recent carload shipment of the ore averaged 66 ounces in silver and $2.50 in gold to the ton and 4.5 per cent of copper. Under the present management
the mine has produced about 300 tons of ore, with a total value of about $7,000. The ore is reported to mill about 5 to 1.
Mineralization is an ore deposit hosted in Ithaca Peak granite. The ore body strikes N65W and dips NE at a width of 22.86 meters. Local structures includes granite and diabase dikes with a NW-trending joint system. Associated rocks include Neoproterozoic granite. Local rocks include Quaternary surficial deposits, undivided.
Workings include underground openings with a length of 213.36 meters and an overall depth of 91.44 meters and comprised of a 300 foot shaft with crosscuts at 200 and 300 feet, now caved.
Production statistics: Year: 1948 (period = 1901-1948): Ag at ^66 ounces (1,864 grams)/metric ton; Cu at ^4.5 weight percent.
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7 valid minerals.
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References
Schrader, F.C. (1908), The mineral deposits of the Cerbat Range, Black Mountains, and Grand Wash Cliffs, Mohave County, Arizona, in Hayes, C.W., and W. Lindgren, Contributions to Economic Geology 1907, USGS Bulletin 340: 64-65. 
