LODE MINING IN SOUTHEASTERN ALASKA. 41 
in the past , have discontinued operations owing to lack of ore. Developments, however, on 
some of the recent finds have exposed promising ore bodies. 
At Taku Harbor and Limestone Inlet, 30 miles south of Juneau, prospecting has been 
done, and at the latter locality discoveries of gold-bearing quartz veins in a granite country 
rock are reported. 
There are two promising prospects in Port Snettisham— the Bach group, located on a 
2-foot quartz vein in the granite country rock, on the north side of Speel Arm, and the Cook 
group, located on a galena deposit in the schist belt 4 miles east of South Arm and near an 
inland lake. 
Opposite Sumdum, on the north side of Endicott Arm, the Portland group is located on a 
wide belt of mineralized schist carrying both gold and silver values. On tins group no 
developments beyond the annual assessment work are reported for 1905. A crosscut tunnel 
180 feet in length penetrates the mineral-bearing schist. 
The Holkham Bay group of claims is situated on the south side of Endicott Arm at 1,800 
feet elevation, 1 mile from the shore. Its ore body is a mineralized quartz lode in the schist 
belt carrying gold, silver, and copper values. Nearly 300 feet of development work has been 
accomplished and a large tonnage of ore is exposed. 
At Windham Bay, 65 miles southeast of Juneau, the many mining corporations which 
were operating in 1902-3 have either discontinued or abandoned their properties, and al I he 
time of visit, in August, 1905, only the Helvetia Gold Mining Company was operating in this 
section. The properties of this company include claims in the second basin of Spruce Creek 
and at the head of the creek. On the lower group a hell of mineralized rock, varying from 
talc schist to quartz schist and intersected by quartz stringers, is being exploited by three 
crosscut tunnels having a total length of 300 feet. At the upper group and on the slopes 
at the head of Spruce Creek lodes apparently of little extent were being prospected. 
At Hobart Bay and Port Houghton but little prospecting lias been done and no important 
ore bodies have been reported. 
KETCHIKAN DISTRICT. 
In view of the detailed report on the Ketchikan district already published by A. H. 
Brooks,« and the more complete reports on the Wrangell and Ketchikan districts in prep- 
aration, only a brief mention will be made of the recent mining developments within these 
regions. 
Gold-bearing deposits have been located at so many different points in this district that 
only the most promising prospects can be considered here. Although a number of the ore 
bodies often exhibit beautiful specimens of free gold, their average content is low and they 
require very economical mining methods to pay at all. Gold tellurides occur sparsely on 
several claims, but do not form an important ore. From present indications several of the 
prospects will soon be producing on a dividend-paying basis. 
KASAAN BAY. 
In the vicinity of Kasaan Bay the principal gold-bearing veins are located on Granite 
Mountain near Karta Bay and at Hollis in Twelvemile Arm. (See map, PI. XI.) Granite 
Mountain consists of a huge boss of granite 3,500 feet high, intrusive into the surrounding 
schists and cut off from the black slates on the south by a great fault. Joint cracks and 
fracture planes in the granite have been filled with gold-bearing quartz veins which are 
well exposed on the mountain top and can be traced along their trend N. 55°-o5° W. for 
over a mile. The crustified appearance of the quartz indicates its fissure-vein character and 
argues well for its continuance in depth. The gold is largely free milling and the values are 
Sufficiently high to warrant further development. 
The Treasure group of claims, located on the east slope of Granite Mountain, is reached 
by trail from Karta Bay. The ore body is exposed in a gulch which has resulted from 
a The Ketchikan mining district, Alaska: Prof. Paper U. S. Geol. Survey No. 1, 1902. 
