274 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
The pay shoot on the main vein, from which the largest part of the production 
has been derived,.has a maximum horizontal length of 300 feet and from the vicinity 
of the shaft pitches steeply north on the plane of the vein. The width of ore is 
very variable, ranging on level 8, for instance, from 1 to 28 feet. The ore is reported 
to continue down to the deepest (ninth) level. The pay shoot on the vein follow¬ 
ing the basic dike is situated about 400 feet north of the main shaft; it seems to 
pitch steeply northward, but, as stated, proved productive only down to level 5. 
MOLLIE KATHLEEN MINE. 
The Mollie Kathleen mine is situated on the south spur of Tenderfoot Ilill, just 
north of the El Paso Gold King mine. It is owned by Hr. M. C. Gortner, of Cripple 
Creek, and is at present being operated under lease by the Creston Big Eight Mining 
Company. The total production is estimated at $200,000. The underground 
developments consist of a shaft 700 feet deep, with stations cut at 100-foot intervals 
and levels at 200 and 700 feet. 
The main shaft and the greater portion of the workings are in a dense breccia, 
considerably pyritized and in places partially oxidized. On the 700-foot level, 
however, the workings to the northwest, beginning at a point about 75 feet from 
the shaft, are in a pyritized massive rock which proves to be a syenite. The con¬ 
tact could not be located exactly, but rock is probably of intrusive character. On 
the 200-foot level a phonolite dike 10 feet wide, striking about N. 25° E. and approx¬ 
imately vertical, occurs 50 feet northeast of the shaft. It was not observed on the 
lower level, but a dike of phonolite apparently vertical and about parallel with the 
drift to the northwest occurs near the shaft on the 700-foot level. 
The Gold King basalt dike, striking on the average about N. 35° E. and dipping 
75° NW., is cut on the 200-foot level about 150 feet northwest of the shaft. On 
the 700-foot level the dip has carried it about 250 feet from the shaft. The dike 
is somewhat irregular in dip and strike, and varies in width from 3 to 5 feet. About 
150 feet northwest of the shaft, on the 200-foot level, the dike is faulted about 1 
foot by a fissure running N. 40° W. and dipping about 65° SW. Neither the fault 
nor any well-defined fissure which might represent it was observed on the 700-foot 
level. On the upper level the dike is considerably decomposed, but shows the 
characteristic longitudinal parting or jointing and the narrow seams of carbonates 
as distinctly as on the level below. 
A number of more or less persistent veins have been found belonging to two 
systems, one of them with a northeasterly, the other with a northwesterly strike. 
The main vein of the Gold King, striking about N. 10° E., has not been encountered 
in this mine. The most important vein apparently follows the basic dike of the 
Gold King, which has been cut and drifted on at both levels. 
On the 200-foot level a zone of Assuring is encountered about 150 feet north¬ 
west of the shaft. It strikes N. 60° E. and dips 75° to 80° NW. The lode ranges 
from 4 to 7 feet in width and consists of very many narrow fissures or cracks approx¬ 
imately parallel, but of little persistence. The breccia immediately about the 
fissures is oxidized. The lode carries values, but in most places the}’ are too low 
to permit of profitable working. Tellurides are said to occur both in the seams 
and, more sparingly, in the rock between them. 
