374 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
another vein of this system. It is similar in character to the others and holds 
kaolin, manganese, and soft, muddy fluorite in the seams. A fourth parallel vein, 
with manganese and much kaolin in the seams, occurs 120 feet west of the shaft, 
on the third or 320-foot level. 
North of the shaft, on level 2, the Fluorite vein carried ore, the values occurring 
principally in the seams as rusty gold. The vein is stoped at this place 3 to 4 feet 
feet wide, 40 feet long, and 40 feet high. 
A small amount of ore was taken from the Manganese vein directly west of 
the shaft, on level 2. On level 3 this vein is good ore, but has not yet been much 
developed. 
Where the Fluorite and Manganese veins unite on level 2 a good body of ore 
has been formed. The rock is oxidized and considerably shattered and the values 
occur in the seams. The rock is reported to average $14 as mined, and the screen¬ 
ings are of better grade. A stope 60 feet long and averaging 10 feet wide had been 
carried up 40 to 50 feet at the time of visit. The ore is said to continue to the 
surface. This is the main ore body of the mine, and it is the intention of the leasing 
company to erect a cyanide mill to treat it. The breast of the drift on the Fluorite 
vein on level 3 was about 130 feet south of the shaft, and good values were just 
beginning, probably indicating the proximity of the Manganese vein. These two 
veins have been cut on level 4, but have not 3 ^et been developed. 
The vein east of the shaft on level 2 is crossed just north of the crosscut by 
a narrow vertical seam, which is not observed elsewhere. At the intersection a 
couple of carloads of ore were taken out. 
LAST DOLLAR MINE. 
PRODUCTION AND DEVELOPMENT. 
The Last Dollar Gold Mining Company owns the Last Dollar and Combination 
claims, covering an area of IS acres. The mine is working on veins which lie in 
the general southward continuation of the Orpha May and Rubie vein system, and 
which, south of the Last Dollar, appear in the Modoc mine. The total production 
from April, 1896, when the property was acquired by the present company, up to 
March 1 , 1906, is $2,090,396. Early in 1904 the mine was hoisting 100 tons per 
day and shipping 30 tons of ore per day. 
The developments consist of a main vertical shaft 1,268 feet deep (in 1904), 
the elevation of the collar being 10,278 feet. Twelve levels are turned, the lowest 
1,218 feet below the collar. The total length of drifts and crosscuts is probably 
10,000 feet. South of the main shaft are three inclines called A, B, and C. B is 
the deepest, reaching down to level 6. The developments are almost entirely 
confined to the Last Dollar claim. The mine had some water a few years ago, 
but in 1904 the bottom level was dry. 
GEOLOGICAL FEATURES. 
The country rock in which the Last Dollar vein occurs is chiefly a syenite, at 
many points going over into latite-phonolite by gradual transition. Phonolite 
dikes are not uncommon, especially on level 12. Breccia occurs on levels 4 and 5 
on the west side of the Modoc vein. 
