Page 161 - The Geology and Ore Deposits of Sierra County, New Mexico - Bulletin 10

MINING IPISTI1I("FS 159
3 to 12 inches averaging $45 in value as hand sorted. The mine was opened through a shaft 900 feet deep, from which drifts in both directions along the vein and 25 to 200 feet in length have been driven at 100-foot intervals.
PETALUMA GROUP
This group of four claims is owned by E. P. Baumann of
Hillsboro. It is situated on the north side of Grayback Gulch in the northwest corner of Sec. 36. A dike parallel to and west of the Chance lead crosses the gulch at this point, and an open cut 50 feet long has been made in it. This cut has been widened to 40 feet to crosscut the full width of the dike and its bordering zones of alteration. The dike in the cut is fractured and bleached, and it and the adjacent rocks show much iron staining of brick- red color along fracture planes.
NORTH PERCHA MINING CO. PROPERTY
This property consists of two patented claims, Cincinnati No. 1 and No. 2. They are located northeast of the Chance mine at the old camp of Grayback in Grayback Gulch. A shaft 400 feet deep has been sunk in andesite breccia, but the workings are not extensive. A mill having a daily capacity of 25 to 30 tons was erected on the site, but according to report it was operated intermittently on custom ores from the district and did not handle more than 7 to 10 tons per day. The plant was finally dismantled and the machinery moved away.
SWEETWATER CLAIM
The Sweetwater claim, also known as the Mogul or South Percha, lies on the east slope of Animas Peak. The strike of the vein is N. 75° E. and the dip 65' NW. It is developed by a shaft 115 feet deep, in which 60 feet of water is standing. Several small stopes are reported, and surface dumps are said to assay $9 in gold per ton. About 80 feet northeast of the old shaft a new one has been started following the vein, and at the time the property was visited it was down 16 feet.
FULLERTON AND LITTLE JEWESS PROPERTIES
These properties are owned by Fred Hiltscher of Fullerton, Calif., and are located on the southern and western slopes of Animas Peak. The Fullerton property, on which the Lewellyn tunnel has been driven, is on the south slope of Animas Peak, about one-third of the way up from Grayback Gulch. The country rock is andesite breccia, which has been fractured in a N. 75° E. direction. The Lewellyn tunnel, with a course of N. 40° W. crosscuts this fracture system. If extended about 500 feet it would intersect a vein in Animas Peak which is said to strike N. 60°-70° E. and to originate near the monzonite porphyry mass of
Copper Flat. The tunnel is 1180 feet long.
The Little Jewess property is high up on the west slope of