84 GOLD AND TIN DEPOSITS OF SOUTHERN APPALACHIANS. 
impregnated with pyrite along a zone 2 or 3 feet wide. Narrow bands of molybdenite 
carrying free gold occur with the pyrite. This ore is said to run $12 to $15. Not far from 
the hanging wall is another similar streak. 
The foot wall, exposed for practically the full width of the new pit, has a smooth, distinct 
surface with large horizontal waves or undulations. It is approximately parallel to the 
foliation of the rocks. Several crosscuts into the foot wall have demonstrated the absence 
of pay values beyond this surface. The line of demarcation between ore and waste is there- 
fore rather sharp. Much of the hanging-wall rock has necessarily been broken to prevent 
its caving in. The nature of the transition from ore to waste is therefore not so well exposed 
as on the foot-wall side of the deposit. Crosscuts from the ore into the hanging wall give 
some idea of this boundary of the ore body, and while the change from ore to unprofitable 
rock appears to be less abrupt than on the foot wall, nevertheless the values decrease rap- 
idly away from the present stopes. These facts mean that no matter how much the processes 
of winning the gold are cheapened in the future, the limits of this ore body are already set, 
so far as lateral extent is concerned. Similar conditions exist in the Bumalo and Beguelin 
bodies. Less satisfactory evidence leads to the same conclusion regarding the longitudinal 
extension of future pay values. In depth, too, it is plain that the various ore bodies are 
not indefinite. In the Haile body some very good ore, running as high as $40 per ton, has 
been found at the 200-foot level, a little below the present bottom of the Haile pit. Some 
stoping has been done between the 200-foot and 270-foot levels on the Haile ore body, 
and more ore from pillars and from the lower-grade periphery can probably be taken out 
profitably when the open cut reaches that depth. But below the 270-foot level the values 
are low, and unless relatively rich pockets or lenses are discovered the time must be expected 
when the ore will become so lean that with the increasing cost as depth is attained it will be 
impossible to mine with profit. A drift on the 350-foot level runs under the continuation of 
this ore body and encounters material carrying values that are appreciable, but too low to 
pay for mining. It appears, therefore, that the ore body has a greater extent downward than 
horizontally, but it seems likely that the limit of workable ore includes much less ground. 
In the Bumalo ore body the principal differences from the Haile are those of dimensions. 
The main portion of the cut, about 250 feet long, is lagged over at a depth of about 100 feet, 
and thus separated from stopes which continue downward almost 200 feet farther. This 
ore body, striking about northeast and dipping to the northwest at a little lower angle 
than the Haile body, has a decided pitch north-northeast in the plane of foliation. It is 
narrower than the Haile deposit, averaging perhaps 40 feet perpendicular to the walls. A 
large quartz lens near the surface is inclosed in the ore body. It is practically barren, 
although the miners believe that the ore near it is a little richer than at a distance. At a 
depth of 45 feet a northeasterly drift was run from the end of the Bumalo cut. Low-grade 
ore was encountered as far as the 192-foot dike. The drift was continued through the dike, 
but no ore was found on the east side. A small diabase dike with northerly strike occurs 
just east of the main workings. It is much decomposed and does not carry values. A 
big stope on the 200-foot level is now inaccessible. On the 270-foot level uneven distribution 
of the values has resulted in irregular stopes, both steep and flat, separated by large and 
small pillars of lower-grade rock. Pay ore was found to stop about 25 feet below the 270- 
foot level. The pitch of the deposit has carried it to the 192-foot dike on this level. The 
350-foot level explores the continuation of this ore body. Appreciable values are encoun- 
tered where the ore would be expected, but nothing of workable grade has been found. 
Just west of the 192-foot dike a 130-foot winze has been sunk, inclined northward at 75°, 
in the hope of striking a new pay shoot, but only low-grade values were found. The 350-foot 
level continues on through the 192-foot diabase dike, but fails to reach ore. The position 
of the narrow dia"base dike on the east side of the 192-foot dike shows that little or no faulting 
has taken place along the latter. 
In view of the recumbent position of this ore body, necessitating the removal of much 
waste from the hanging wall, the extraction of the material remaining below the 200-foot 
