48 ALASKAN MINERAL RESOURCES IN 1905. 
chalcopyrite-magnetite type. They contain low gold values and have been exposed by twoi 
tunnels and a short shaft, besides several open cuts and surface strippings. The main body 
averages nearly 6 feet in widt h and pitches apparently 45° N. It has been cut off by an cast- 
west fault plane dipping 80° N. Above the lower tunnel an open cut and shaft follow a 
similar mass, which is probably part of the same lens. Associated with the chalcopyrite 
ore are pyrite, garnet, epidote, chlorite, and calcite, and these are noteworthy because on 
their probable origin in a contact aureole of limestone and eruptive rocks. The eruptive: 
rocks show int imate connection with the ore bodies and consist of altered diorite and dike! 
of felsite and diabase. As a rule the chalcopyrite occurs sporadically with the result that 
the average met al content is low and requires skillful treatment to obtain satisfactory results. 
The Copper Queen mine lies to the east of Kasaan and includes seven patented claims] 
The ore bodies occur ordinarily in a garnet-epidote limestone rock and have been exploited 
by several tunnels and test pits. Dikes of porphyry were frequently observed near the ore 
body, and along their contact slipping has taken place. Bands of greenstone were also noted] 
intercalated in the beds of limestone. The chalcopyrite ore is accompanied by pyrite, m;ig- 
n:t it e. chlorite, garnet, calcite, and epidote. The ore bodies are irregular in shape and give 
low assay returns in copper and gold. Of late years litigation has suspended development 
work on the property. 
The Poor Man's group of two claims is situated about I2 miles from Kasaan and is 
reached from tide water by a tram one-half mile in length. The ore bodies are of the usual 
Kasaan magnet it e-chalcopyrite type and have been exploited by a shaft 84 feet deep and 
several tunnels. Although the magnetite body itself is extensive the copper-pyrite masses 
occur only in isolated pockets, and are not disseminated throughout the magnetite suffil 
cientlv to make pay ore of the whole. Faulting is not uncommon and has caused minor 
displacements in the ore body. 
KASAAN HAY. 
The Sunny Day group of three claims is located on the south side of Kasaan Bay, opposite 
Kasaan village. The vein follows the hanging wall of a wide porphyry dike striking X. (>5° 
E., wit h vertical dip, and carries chalcopyrite with low gold and silver values. It has been 
traced for some distance by means of surface exposures and open trenches and found to 
vary not only in width but also in mineralization. The porphyry dike invades a com pie J 
of highly metamorphosed greenstones with occasional marble bands and bosses of diorite. 
A tunnel situated several hundred paces from the shore has been driven 135 feet to undercut 
the vein and should reach ore within the next 10 to 20 feet. 
The Roman and Rosalie claims are situated at about 1,000 feet elevation above tide on 
the east side of Twelvemile Arm, near a small hay '2\ miles from Hollis. The ore consist 
essentially, of pyrite and chalcopyrite with low values in gold and silver and is confined to a 
6-foot band of marble, which forms part of an actinolite and chlorite-schist complex with 
some greenstone and indurated slate. A seam of soft gouge marks (he foot wall and indi- 
cates movement along the bedding plane. Developments consist chiefly of a drift 40 feet 
long and a winze 25 feet deep. 
KARTA BAY. 
Mining operations have been carried on at two points in the vicinity of Karta Bay during 
the last summer — namely, the Rush & Brown property and the Mammoth group. The ore 
bodies at both places are of the Kasaan type, and are to all intents magnetite masses enriched 
by chalcopyrite blebs and patches more or less irregularly disseminated throughout the 
whole. Their average content is so low that at present only the richer portions are mined. 
A magnetic survey of the Rush & Brown property has been made and the magnetite bell 
traced for a considerable distance. The mine workings are located in that portion of the 
belt which shows the maximum magnetic attraction and have given promising results. 
Since the copper-bearing bodies on Kasaan Peninsula ordinarily consist largely of magnet ilc. 
the advisability of locating and prospecting for them by means of the magnetic dip neeulr 
and dial compass or transit is apparent and to be recommended. 
