42 ALASKAN MINEEAL EESOUECES IN 1905. 
erosion along the quartz-filled fissure. At about 1,400 feet elevation a tunnel over 500 feet 
in length has been driven along the vein, which varies from 1 to 3 feet in thickness, with an 
average of about 18 inches, and strikes N. 55° W., with a steep northeasterly dip. Its walls 
are five and often lined with mineralized gouge, and show slipping striae which pitch at low 
angles to the northwest. The vein lies largely in the hanging-wall side of a diabase dike 
which is frequently decomposed and resembles the "paint rock" of iron-ore miners. The 
dike has invaded the granite and fills one of the several large fracture or joint fissures. 
Along the same plane of weakness the mineral-bearing solutions have also deposited their 
content of quartz with free gold, pyrite, chalcopyrite, and galena. The term granite has 
been used as a held name, the actual rock being more basic in composition and varying from 
a medium- to line-grained diorite to gabbro in which considerable secondary epidote and 
hornblende appear. A second tunnel, about L60 feet beneath the upper one, has been driven* 
50 feet along a narrow quartz vein 6 inches in width which may he the continuation of the 
main lead. Above these workings a second set of veins has been discovered crossing the 
first and si riking N.15°-20° \Y. They are also yoUnger than the diabase dikes and crosscut 
instead of following them The character of mineralization of the cross veins is not unlike 
i hat <>|' i he lirst set. Values, however, are reported to be lower and irregularly distributed. 
The remaining claims on Granite Mountain, the Copper group, Cutter, Bendigo, and (he 
Buckhorn group, also several claims on the north foot of the mountain near Salmon Lake, 
air so similar in character that the above general description applies to the entire group. 
The details of each claim will he taken up later in the full report. 
In the vicinity of Mollis several favorable prospects have been located and a notable 
amount of development work accomplished in past years. During the last two seasons, 
however, mining enthusiasm has been at a low ebb and exploration confined to the Cracker- 
jack, Puyallup, Flora and Nellie, and Dew Drop properties. The first two of these are 
located on gold-hearing quartz veins in a black slate-argillite complex which strikes aboui 
northwesl and exhibits extensive and complicated folding with some faulting. 
The Crackerjack vein has been traced bysurface exposures for a mile, and is a well-marked, 
strong fissure filling, occurring on the hanging wall of a porphyry dike which invades the 
argillite parallel to its bedding planes. The values occur in shoots, the discovery of which 
has encouraged the driving of several long drift tunnels. The important minerals are galena, 
zinc blende, tet rahedrite (gray copper), and pyrite. Of late exploitation has been confined 
to assessmenl work alone. 
At the Puyallup mine the Crackerjack argillite belt dips to the northeast in corisequence 
of a large anticlinal fold, instead of to the southwest, as at the Crackerjack mine. The ore] 
bodies of both mines are free-milling gold quartz, and have been treated up to the present 
time in a 5-stamp mill erected on the Puyallup property and connected with Hollis by a 
tram. Although considerable ore. was mined during the past year, developments were 
not extensive. A new lead, however, has recently been discovered which lies to the south! 
west and below the original one and may bear some relation to it. A short prospect tunnel, 
80 feet iong. has been driven along this vein and samples have been taken at several points. 
In the mine drifts porphyry dikes were observed parallel to the formation and in apparent 
close relationship to the quartz veins. Faulting in the formation occurs frequently and is a 
source of t rouble in the mine. 
The Flora and Nellie group and the adjacent Dew Drop and Rose claims are reached from 
Mollis by a good trail 8 miles in length. The vein occurs in an altercd-porphyry dike and 
varies from D inches to 1 feet in width. It has been followed underground by two tunnels 
for aboui 500 feet and shows favorable indications at several points. 
The Dew Drop and Rose claims are located on the top of the mountain above the Mora 
and .Nellie and, together with the Commander and other claims, have been worked on a small 
scale during the last year. Before economic mining operations can be carried on satisl'ac- 
