MINES OF BELL HILL. 
375 
LODE SYSTEMS. 
The Last Dollar and the Modoc veins form on this claim a practically con¬ 
tinuous system of linked veins, striking N. 10° to 25° W.; they are either vertical 
or dip very steeply westward. A number of short cross veins intersect the Last 
Dollar veins on both sides of the main shaft; their trend is N. 50° to 60° E., and 
their dip very steep, say 75° NW. Actual intersections were not seen, but Mr. 
Charles Walden, the manager, states that the Last Dollar veins cut across the 
sulphide veins, and would thus appear to be the later of the two. 
ORES. 
The principal gangue minerals are a slightly greenish dolomitic mineral, with 
some fluorite and quartz. Above level 8 the ore is entirely oxidized, but below it 
calaverite is probably the most important ore mineral. Tetrahedrite, rich in silver, 
occurs on the Modoc veins and on the short northeast veins crossing the Last 
Dollar veins. Pyrite, zinc blende, and mol} r bdenite, with a little galena, also 
occur on these cross veins, while they are practically absent from the Last Dollar 
veins. 
Some of the stopes are 20 feet wide; a width of 4 or 5 feet is, however, more 
common. The structure of the veins is that of sheeted zones, in which, within a 
space of a few feet, there are up to 20 or more narrow, parallel carbonate and 
fluorite seams on which the calaverite occurs. The ore extracted in the mine is 
screened and washed, the coarse part being rejected as waste, while the screenings 
are of high grade. The cross veins have a similar structure in which a central 
seam, with vugs and pseudomorphic quartz is often prominent. Sometimes the 
central fissure will be filled by fluorite, several inches wide. The Modoc veins 
contain little fluorite. 
PAY SHOOTS. 
* 0 
The most important ore shoot follows the intersection of the cross vein with 
the Last Dollar veins at the shaft, and thus dips 75° N. on the plane of the latter. 
The most productive part thus far exploited occurred in this shoot, between levels 
4 and 8, but the shoot has proved rich as far down as the present developments 
have been carried—that is, to level 12. The greatest horizontal length of this 
shoot is 250 feet. Rich bodies of ore also occurred at the intersection with the 
main vein of several other cross veins located farther south, near shaft C (fig. 43). 
On the cross veins sulphides and tetrahedrite prevail, but it is believed that in these, 
too, the principal value lies in the calaverite. Pay ore extends on these cross veins 
up to a distance of 40 feet from the Last Dollar veins. 
On the Modoc veins a shoot was stoped from the surface down to level 6, and 
recently good ore has been found on the same vein system on level 10. Explora¬ 
tions in the northern part of the claim have discovered some bunchy ore, but no 
regular shoots. 
DETAILS OF THE LAST DOLLAR VEIN SYSTEM. 
The Last Dollar vein really consists of three branches, which appear to unite 
300 feet north of the shaft. There are practically no developments north of the 
shaft above level 4. The easterly branch, 75 feet east of the shaft, stands practically 
