MINES OF POVERTY GULCH. 
277 
conspicuous in the Abe Lincoln mine than elsewhere. This gneiss is cut by irregular 
dikes of reddish granite, such as may be seen in the cut at the Short Line station 
in Cripple Creek, and by dikes of phonolite. So far as known these dikes have 
exerted no particular influence on ore deposition. The schist encountered in the 
mine is a fibrolitic schist similar to that exposed in the Short Line cut near the 
Poverty Gulch trestle, containing large scales of muscovite. It is often intimately 
mingled with the gneiss, and like the latter is cut by dikes of red granite. The 
long east crosscut on level 2, after passing through breccia, continues for about 
250 feet in shattered schist, which contains much pvrite in veinlets and in dissemi¬ 
nated crystals. This schist is part of the same mass that is exposed at the surface 
near Fairview and that is reached also by the Chicago and Anaconda adits. 
In nearly all the breccia seen in the Abe Lincoln mine granitic or gneissic 
fragments predominate over those of other rocks. In a few places, however, 
fragments of schist are the most abundant. Recognizable fragments of phonolite 
or andesite are extremely rare. The breccia usually contains much pyrite as finely 
disseminated crystals and in irregular bunches and veinlets. 
There are at least two important basic dikes in the Abe Lincoln mine. One 
of these, called the Gold King dike, is supposed to be the dike known in the Gold 
King mine in Poverty Gulch and exposed beside the Short Line track just south¬ 
west of that mine. It has been followed for 500 feet in the Chicago tunnel, for 
about 70 feet on level 1 of the Abe Lincoln, and for 600 feet on level 2, where it lies 
about 1,000 feet east of the Abe Lincoln shaft. Its general course is N. 10° E. and 
it dips west at from 60° to 75°. This dike is crossed by a second basic dike which 
strikes generally N. 75° W. and dips southwest at varying angles, ranging from 
about 60° to 75°. This second dike has been followed for about 700 feet on level 1 
of the Abe Lincoln, in a drift which is under and has nearly the same course as the 
initial portion of the Chicago tunnel. Both dikes appear to have been intruded at 
the same time and there is no appreciable faulting at the junction. The second 
dike, known as the Gold Pass dike, is supposed to be identical with the basic dike 
which has been drifted on for over 1,300 feet in the Chicago tunnel near the Gold 
Pass shaft. The general strike of the dike, as shown bj^ this Gold Pass drift, is 
northwest. But as its course is very irregular and as it frequently branches and 
pinches out it may be that the two dikes, or rather dike zones, are really continuous. 
LODE SYSTEMS. 
Most of the ore in the Abe Lincoln mine occurs in a network of narrow and not 
verc persistent lodes in gneiss, southwest of the main shaft. The most prominent 
of these lodes strike northwest or notheast, but they are intimately associated 
with other fissure zones running more nearly north and south. Few of the individual 
fissure zones have been followed for more than 400 feet. The most persistent 
productive lode is the Lillie, which strikes N. 20° E. and has been stoped for a 
length of 300 feet on level 1. On level 2, however, the Lillie fissure zone has not 
been found. The Abe Lincoln lode is a sheeted zone of rather indefinite width, 
striking N. 50° or 60° W. and dipping southwest. The name is used to designate 
one or more fissures of a general zone of approximately parallel fissures. The total 
width of this zone is probably 150 or 200 feet. The portion known as the Abe 
