MINES OF GOLD HILL. 
311 
yet been certainly identified on the levels below the adit. The Virginia M. should 
intersect the Anaconda lode near the northwest corner of the Mary McKinney 
ground, but the present developments in this vicinity fail to show the exact relation 
of the two lodes. 
The Black or Work lode is cut in the adit about 800 feet from the portal and 
has been drifted on for over 700 feet on level 10. It strikes N. 30° W. and dips 
steeply southwest. 
Between the junction of the Anaconda and Excelsior lodes and the Kittie M. 
lode the adit level passes for nearly 2,000 feet through breccia showing no lodes of 
any importance. The Kittie M. or Matoa lode strikes about N. 23° E., and on 
the whole is vertical. Near the surface and in the Half Moon and Anchoria-Leland 
mines the Matoa lode is in breccia. On the adit level of the Anaconda, however, 
it is chiefly in schist and is less distinct than in tjie breccia. 
j 
CHARACTER OF ORE. 
The ore taken from the Anaconda and Excelsior lodes from 1892 to 1897 was 
all partly oxidized, containing free gold and some calaverite or sylvanite. Some 
of it is said to have carried 16 ounces of gold per ton, in carload lots. None of 
this ore could be seen in 1904. The ore of the Virginia M. lode is also partly oxidized 
and similar in general character to that from the Anaconda lode. A little tetra- 
hedrite, said to contain considerable gold and silver, occurs in a small fissure with 
quartz and kaolin in the breccia north of the Excelsior lode on th adit level. The 
same level near the Half Moon shaft cuts through a vein containing galena, sphaler¬ 
ite, and pyrite. These occurrences, however, have not proved of economic impor¬ 
tance, the valuable mineral of the ore of the Anaconda mine being essentially a 
telluride of gold, or free gold derived from the telluride by oxidation of the tellurium. 
PAY SHOOTS AND LODE STRUCTURE. 
The Anaconda lode is a typical sheeted zone, for the most part in breccia, but 
cutting also through latite-phonolite. Where comparatively unoxidized, as on 
level 10, the fissures of the lode are filled with small vuggy veinlets of fluorite, carry¬ 
ing as a rule little or no ore. The lode has no well-defined walls and the width of 
the sheeting varies greatly. As stope maps are not available and the old levels are 
abandoned, the Anaconda pay shoot can not be described in detail. It extended 
from the surface to within 100 to 200 feet of the adit level and probably had a 
maximum stope length of 700 to 800 feet. The ore appears to have occurred wholly 
within the zones of complete and partial oxidation. 
An isolated body of ore was stoped from the southern part of the Anaconda 
lode on the adit level and is said to have yielded $78,000. The ore, however, was a 
mere bunch and came to an end 10 feet below the level. Another little body of 
ore was taken from a short branch or spur from the Anaconda lode on level 10, and 
yielded $11,000. These occurrences show that while the original Anaconda pay 
shoot has a definite lower limit above the adit level, yet a certain amount of good 
ore may occur as bunches in the lode at any depth within the range of the present 
workings. 
