40 ALASKAN MINERAL RESOURCES IN 1905. 
present, but do not appear to be any richer in auriferous sulphides. A second and widei 
though lower-grade ore belt parallels the above a few hundred feet to the east, but no de- 
velopments have been made on it in depth. Careful investigations were made of theJ 
auriferous schists dining the past summer to determine their gold contents and milling: 
properties and the results attained have encouraged further developments. 
A similar mineralized band and a possible continuation of the Red Diamond lode is being: 
investigated on the Mammoth group of claims, situated one-fourth mile below the divide 
on Nevada Creek. Two crosscut tunnels have been driven at 1,200 and 1,250 fret elevation 
and in these two mineralized schist bands corresponding to those described above are 
exposed. 
During the last two years little development work has l>ccn done on the property of the' 
Alaska Treasure Consolidated Mines Company, which is located below the Mammoth group,. 
and t he extent and value of the mineral deposits is still undetermined. A belt of niineralized'l 
schisl is exposed forovera thousand feet in width up Nevada Creek and some narrow seamaa 
of rich ore have been exposed. The belt as a whole carries low values and future mining will 
probably be confined to bands of ore similar to those exposed on the Red Diamond andl 
Mammoth groups. Subsequent to the time of visit a large crew of men were employed by\ 
this company and systematic developments begun. 
Other piopci! ies on the island are those of the Alaska Atlin Company, the Yakima Min- 
ing Company, and the Alaska Consolidated Mining Company. None of these properties are 
considered of much importance :it the present time and no improvements have been madei 
during the last two years. 
ADMIRALT3 [SLAND. 
A mineral belt onAdmiralty [sland, "extending from Funtcr Bay to the north end of Sey- 
mour Canal, has been explored at t wo localit ies this last year, namely, the Mammoth group 
of claims, I miles south of Young Bay, and the Portage group, 2 miles from the head of Fun- 
tei Bay. At the first-mentioned locality investigations were made on surface exposures 
consisting of a wide belt of mineralized schist traversed by occasional stringers of quartz 
carrying pyrite, galena, and sphalerite. The final results obtained from numerous samples! 
are reported to have been unfavorable and developments were discontinued. 
At the Portage group assessment work was accomplished on the lower claims located at 
100 feet elevation; above them several new locations were made on a belt of mineralized 
schisl , outcropping at 700 feet elevation, 2 miles from the head of the bay. This schist belt, 
which is exposed across a width of 30 feet, resembles that of the Mammoth group already 
described. The st rike of the mineralized schist at this point isN. 10° W. and the dip 65° NE.,1 
the foot wall being defined by an unmineralized and massive greenstone, the hanging wall by 
a gradual decrease in mineralization. 
On Punter Mountain many claims were located during the first part of the year, but no 
development work was performed during the summer. 
Southwest of tins mineral belt is the President group of claims, located on the west sidej 
of Admiralty Island, 1 mile east of Fishery Point, at an elevation of 250 feet. Three ore 
bodies composed of quartz and mineralized schist have been discovered here, which are 
reported to average 30 feet in width and are separated from one another by two narrow 
belts of barren schist. The ore bodies follow the trend of the country rock, striking north- 
west and dipping southwest. The sulphides contained are principally pyrrhotite, pyrite, 
and chaicopyrite, accompanied by small amounts of galena and sphalerite. Several cuts 
expose the lodes on the surface and a shaft has been started to investigate them in depth. 
MIXES SOUTH OF TAKU INLET. 
None of the mines along the mainland south of Taku Inlet, namely, at Port Snettisham, 
Sumdum Bay, and Windham Bay, added to the metal production of the Juneau district 
during 1905. The two mines at Snettisham and Sumdum, which have been gold producers 
oWr<ght,C. W., a reconnaissance of Admiralty Island: Bull. U.S. Geol. Survey No. 287, L906 (in press! 
