MINES OF RAVEN AND GUYOT HILLS. 
327 
PAY SHOOTS AND LODE STRUCTURE. 
The principal pay shoot is in the Mary McKinney lode, a regular sheeted zone 
in phonolite. This shoot has been stoped from the surface to level 5 and for a 
length of nearly 2,000 feet. Although portions of the lode have proved to be of too 
low grade for stoping, yet the sheeted zone constitutes an essentially continuous 
ore body from a point 700 or 800 feet south of the shaft north to the contact of the 
phonolite. In other words, where the fissuring is regular and distinct it usually 
carries ore. Some bodies of ore occur in the Mary McKinney sheeted zone in the 
breccia, but these can hardly be considered as belonging to the main pay shoot. 
The lode on the whole is rather narrow, stupes over 5 feet in width being apparently 
exceptional. At the time of visit, however, the Mary McKinney lode had been 
nearly worked out down to level 5 and there were few opportunities of studying 
the occurrence of the ore. There is usually a main fissure up to 4 or 5 inches in 
width, carrying quartz and dark, compact fluorite and showing vuggy cavities in 
its medial plane. Where such vugs occur, and particularly where roscoelite is 
associated with fluorite, the ore is usually good and crystals of calaverite may be 
seen in the vugs and embedded in the quartz and fluorite. This relation, however, 
does not hold everywhere, for certain vuggy portions of the lode, containing much 
roscoelite, are too poor to pay. Associated with the main fissures are others of less 
persistency. Some of these are parallel with the main fissure, while others are of 
irregular character. These subsidiary fissures usually contain quartz and fluorite 
and some of them carry calaverite and tetrahedrite. According to Superintendent 
Buckles there is a definite relation between the tenor of the ore and the character 
of the jointing on the hanging-wall side of the lode. Where the joints dip gener¬ 
ally east or into the lode the ore is good. Where they dip west or away from the 
lode the ore is poor. 
The Le Clair lode is similar to the Mary McKinney in structure and mineralog- 
ical character, but the pay shoot is much shorter. It nowhere extends for more 
than 500 feet from the intersection with the Mary McKinney lode, and as a rule 
ends within a much shorter distance. 
The northern part of the mine contains a number of short pay shoots, some in 
the nearly vertical lodes, some in the flat veins, and some at points of intersection 
of two or more zones of fissuring. 
The No. 2 lode is a sheeted zone of the usual type, in which the ore occurs 
rather erratically to a maximum width of about 12 feet. At the north end of 
level 4 the fissures of the sheeted zone are abundant and narrow, the calaverite 
occurring in them and in the more irregular joints of the breccia, associated with 
thin films of fluorite much as in the Captain stopes of the Portland mine. Short 
pay shoots occur also in the No. 1 lode and in the No. 4 cross lode. These are min¬ 
eralized sheeted zones of the usual type, the ore consisting of calaverite in the 
narrow fissures cutting either breccia or phonolite. The No. 1 lode is not a regular 
sheeted zone, but is composed of a number of such zones of slight individual 
persistency which intersect at small angles. It thus shows frequent variation in 
strike and dip and the ore occurs in isolated bunches. Some of the flat veins, 
particularly the No. 3, have proved individually productive. The No. 3 flat vein 
