gradational contacts) by metabasalt. Contains probably less than 10%
magnetite in grains as much as % in in diameter. Ilmenite intergrown
with magnetite; as much as 3.91% (Knopf) or 2.3% (Robertson) Ti02-
Some apatite present. Pyroxenite may be magmatic segregation deposit
(Wright) or recrystallized basaltic rocks (Eakin). Resource estimated
at several billion tons containing less than 10% magnetite. Only ex-
ploration was 100-ft tunnel driven in about 1906.

Hayes Copper, Iron
Juneau district, Skagway (23.4, 1.0)
MF-424, loc. 9 59°02'N, 135°24'W

Prospect on a cliff at the head of a talus slope that contains float of
magnetite in marble and chalcopyrite and hematite in schistose marble
partially altered to skarn.

Inspiration Point Mining Co. Copper, Gold, Lead, Silver, Zinc
Juneau district Skagway (25.4, 11.3)
MF-424, loc. 22 59°37'N, 135°08'W

Quartz diorite contains small lenses and masses of argentiferous galena
and probably other- sulfides. Gold also reported. A few tons of ore
containing values in silver, lead, zinc, and copper is said to have
been produced.

Klehini R. Gold
Juneau district Skagway (14.7-15.9, 7.6-8.0)
MF-424, loc. 27 (in part) 59°925'=59°27'N, 136°13'-136°21'W

Placer gold near mouths of Jarvis and Porcupine Creeks and probably at
many other places. Very little mining, but much testing to determine
if deposits of river flats were amenable to dredging (mainly in early
1930's).

(Klukwan) Copper, Iron, Platinum, Titanium,
Vanadium

Juneau district Skagway (18.55-19.35, 7.3-8.0)

MF-424, locs. 15, 16 59°24'~59°26'N, 135°50'-135°55'W

Titaniferous magnetite in pyroxenite; magmatic segregation with magnet—
ite interstitial to pyroxene and idiomorphic against hornblende. Pyrox-
enite surrounded by diorite. According to Robertson, several tabular
zones contain an average of about 20% magnetic iron; about 500 million
tons of rock; several billion tons of rock contain about 13% magnetic
iron. Accoring to Taylor and Noble, the titaniferous magnetite is
fairly uniformly distributed through the pyroxenite and makes up 15-20
percent of the rock. Other constituents are small amounts of chalco-
pyrite, hematite, pyrite, pyrrhotite, spinel, and leucoxene. By analy-
sis it was determined that samples contained 0.01%-0.29% (average 0.2%)
vanadium and as much as 0.11% P, 0.03% S, 0.03% Ni. Scandium identified
spectrographically. Fan at foot of mountain slope contains an estimated

A4


Chalcopyrite(?) disseminated in hornfels.

Unnamed occurrence Molybdenum
Juneau district Skagway (17.4, 3.9)
MF-424, loc. 10 59°12'N, 136°04'W

Molybdenite disseminated in biotite granodiorite(?).

Ag


contained $2.48 in gold per ton (gold at $20.67).

(Minnesota Ridge) Copper, Gold
Juneau district Skagway (15.6, 0.4)
MF-424, loc. 5 59°01'N, 136°16'W

Pyrite, chalcopyrite, and secondary minerals along joints in grano-
diorite or quartz diorite. Small outcrop in extensive snowfield.
Samples contained as much as 0.10 ppm Au.

(Mt. Barnard nunatak) Copper

Juneau district Skagway (9.45, 1.65)
59°05'N, 136954'W

Small sulfide pods in altered volcanic rocks and limestone contain
traces of chalcopyrite.

(Mt. Brack) Copper, Gold, Lead, Silver, Zinc
Juneau district Skagway (15.45, 2.1)
MF-424, loc. 6 59°07'N, 136917'W

Veins in graywacke, limestone, hornfels, siltstone, and mafic rocks are
6-8 in thick and carry sphalerite, galena, chalcopyrite, probably a
sulfosalt, and as much as 70 ppm Ag and 30 ppm Au. Includes reference
to (Mt. Brock).

(Mt. Ripinski) Iron

Juneau district Skagway (22.25, 5.0)
59°16'N, 135°31'W

Titaniferous magnetite associated with mafic and ultramafic rocks.

(Nugget Cr.) Gold, Silver
Juneau district Skagway (16.3-16.35, 5.3-5.55)
MF-424, loc. 30 59°18'N, 136°11'W

Bedrock slate. Placer gold discovered 1899; sporadic mining, 1902 to
1911 or 1912 and possibly in 1929. Total production was probably about
300 fine oz. One concentrate sample contained 266.60 oz gold and 68.32
oz silver per ton. All mining on claims near mouth.

(Porcupine Cr.), (R.) Copper, Gold, Lead, Zinc
Juneau district Skagway (15.6-15.85, 7.0-7.5)
MF-424, loc. 26 59°24'-59925'N, 136914'-136°15'W

Placer gold discovered, 1898; mined intermittently to as recently as
1968. Porcupine Cr. and its tributaries McKinley and Cahoon Creeks
accounted for most of the estimated 60,000 oz of gold from the area.
Bedrock mainly slate and limestone; dioritic rocks at head. Slate con-
tains calcite and quartz veins and disseminated sulfides. Sample from
apparently barren quartz veins assayed $5.28 a ton in gold(at $20.67).

A6


500 million tons of broken similar material with average magnetite con-
tent of 10%. Deposits long known, but no great interest shown until
after World War Il. A few tons was taken from the fan for metallurgi-
cal testing, but there has been no commercial production. Of 10 samples
of pyroxenite, 7 contained platinum (average 0.046 ppm) and 7 contained
palladium (average 0.040 ppm).

(Marble Cr.) Gold(?)

Juneau district Skagway (15.6, 7.0) approx.
59°24'N, 136°14'W approx.

Claims staked in about 1900. A little gold may have been mined in 1929.

Margerie Copper, Gold, Molybdenum, Silver,

Tungsten, Zinc
Juneau district Skagway (8.3, 0.35)
MF-424, loc. 1 59°01'N, 137°05'W

Quartz veins, mineralized shear zones, pyrrhotite-rich massive sulfide
bodies, and sulfides disseminated in Tertiary and/or Cretaceous grano-
diorite and (to a lesser extent) in a complex section of Permian(?)
clastic, volcanic, and carbonate rocks altered to hornfels near intrus-
ive contacts. Metallic minerals include chalcopyrite, pyrite, arseno-
pyrite, sphalerite, pyrrhotite, and molybdenite accompanied by powell-
ite-scheelite, gold, and silver. Inferred identified resource is es-
timated at 160 million tons containing 0.02%Cu,0.008 oz gold and 0.13
oz silver per ton, and 0.01% W; some higher grade parts of the deposit.
Includes references to (Margerie Glacier).

(McBride Glacier) Copper, Gold, Silver
Juneau district Skagway (17.4, 1.9)
MF-424, loc. 7 59°06'N, 136°04'W

Ankeritic zones virtually conformable with bedding near facies change
between marble and phyllite are less than 2 ft thick and 100 ft long
and contain arsenopyrite, chalcopyrite, pyrrhotite, and small amounts
of gold and silver. Five-ft-wide andesite dike also contains chalco-
pyrite and pyrite. Samples contained as much as 0.087 oz gold per ton
and 15 ppm Ag.

(McKinley Cr.) Gold
Juneau district Skagway (15.7-15.8, 6.7-7.1)
MF-424, loc. 26 59°23'-59924'N, 136914'-136°15'W

Tributary of Porcupine Cr. Gold discovered in 1899. Both creek and
bench placers mined. Creek placers mined for 2,000 ft downstream from
mouth of Cahoon Cr. Bench placer was an old channel 200 ft above
present stream. Mining was hampered by large boulders; flume needed

to carry water around part of creek being mined. Mining probably
ceased in about 1916. Bedrock is slate with many calcite veins, some
cross-cutting quartz veins; much pyrite. A sample of mineralized slate

AS


altered rhyolite(?) contains as much as 0.22% eU. No sulfides; a few
specks of purple fluorite. Very little of the radioactive material is
present.

Stampede Gold(?)
Juneau district Skagway

NWXNWZNWZSE% quad.

Exploration of gold lode claims, 1929. Large company dropped option.
Work may have been in Canada. This may be the prospect shown on
several maps (e.g., Pl. 1, B 699) as beingin Canada just north of
Jarvis Glacier.

(Summit Cr.) Copper, Gold, Lead, Silver
Juneau district Skagway (17.1, 6.25)
MF-424, loc. 13 59920'N, 136°05'W

Small silver-lead veins have a maximum metal content of about $3 a ton
in gold (at $20.67), about 60 oz silver a ton, and about 35% lead. One
sample contained nearly 3% copper. Only slight development. Eakin
considered the veins to be too small for profitable exploitation. Pros—
pect could not be found in about 1970.

(Takhin R.) Gold
Juneau district Skagway (16.7, 4.95) approx.
MF-424, loc. 31 59°16'N, 136°08'W approx.

Gold-bearing gravels have been found.

(Tarr Inlet) Copper, Gold, Silver, Zinc
Juneau district Skagway (8.75-9.0, 0.15-0.3)
MF-424, loc. 2 (in part) 59°900'-59901'N, 137°00'-137902'W

Fault and shear zones in a body of Cretaceous quartz monzodiorite with
large xenoliths of hornfelsed shale and volcanic rocks and 2 small
plugs(?) of porphyritic granite contain pyrite, chalcopyrite, sphaler-
ite, and arsenopyrite. Samples of richer parts of mineralized zones
contained as much as 3,300 ppm Cu, 5,000 ppm Zn, 3,100 ppm Pb, 50 ppm
Ag, and 0.15 ppm Au.

Unnamed occurrence Copper
Juneau district Skagway (21.0, 6.0) approx.
MF-424, loc. 17 59°20'N, 135°40'W approx.

Bornite and hematite reported from prospects on ridge between Chilkoot
and Chilkat valleys about 10 mi NW of Haines. The quartz veins with
bornite usually also carry hematite.
Unnamed occurrence Copper(?)
Juneau district Skagway (19.2, 4.15)

59°13'N, 135952'W

Ag


UNITED STATES DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY

SUMMARIES OF DATA ON AND LISTS OF REFERENCES TO
METALLIC AND SELECTED NONMETALLIC MINERAL OCCURRENCES
IN THE SKAGWAY QUADRANGLE, ALASKA,
SUPPLEMENT TO OPEN-FILE REPORT 78-316

PART A -- SUMMARIES OF DATA TO JANUARY 1, 1980

By
Edward H. Cobb

Open-file Report 81-82A
1981

This report is preliminary and has
not been reviewed for conformity
with U.S. Geological Survey editorial
standards.


Synonyms, Owners, Operators, and Claim Names

Alaska Corp. -- see (Porcupine Cr.)

Alaska Iron (& Steel) Corp. -- see (Haines), (Klukwan)
Alaska Iron Mines, Inc. -- see (Klukwan)

Alaska Juneau Gold Mining Co. -- see Stampede
Alaska-Sunshine Mining Co. -- see (Porcupine Cr.)
Anway -- see (Cottonwood Cr.), (Nugget Cr.)
Barkdull and associates -- see (Klukwan)

Brown and associates -- see (Haines), (Klukwan)
Cahoon Creek Gold Mining Co. -- see (Cahoon Cr.), (McKinley Cr.)
Cahoon Creek Placer Mining Co. -- see (Cahoon Cr.)
(Calhoun Cr.) -- see (Cahoon Cr.)

Chisel & Chisel -- see (Haines)

Chisholm (& Clark) -- see (McKinley Cr.)
Combination -- see (Clifton)

Cranston -— see (Porcupine Cr.)

Delta -- see (Porcupine Cr.)

Finley -- see (Porcupine Cr.)

Franklin and others -- see (Haines)

Gold Nugget Mining Co. -- see (Porcupine Cr.)
Guyot & Cartwright -- see (Clifton)

Ibach -- see (Rendu Glacier)

(Kelsall R.) -- see (Bear Cr.)

Kenney Presbyterian Home -—- see (Tarr Inlet)
Klukwan Iron Corp. -- see (Klukwan)

Le Fevre -- see (Klukwan)

Legal Tender -- see (Porcupine Cr.)

(Margerie Glacier) -- see Margerie

McKinley Creek Mining Co. -- see (McKinley Cr.)
Mix -- see (Porcupine Cr.)

Moneta~Porcupine Co. -—- see Margerie

(Mt. Brock) -- see (Mt. Brack)

(Nunatak) -- see (Saksaia Glacier)

(Orange Point) -- see (Tarr Inlet)

Palmer, Morlanand associates -- see (Glacier Cr.), (Saksaia Glacier)
Porcupine (Gold) Mining Co. -- see (Porcupine Cr.)

Quebec Metallurgical Industries, Ltd. -- see (Klukwan)
(Sakasia Glacier) -- see (Saksaia Glacier)

Ship -- see (Rendu Glacier)

(Solomon R.) -- see (Salmon R.)

Takahashi, Upton and associates -- see (Klukwan)

(Takshanuk Mts.) -- see (Klukwan), (Mt. Ripinski)
(Tsirku R.) -- see (Salmon R.)

United Gold Mining Co. -- see (McKinley Cr.)
Woodin -- see (McKinley Cr.)

(Yokeak Cr.) -- see (Big Boulder Cr.)

Alo


Gold in creek gravels from mouth upstream to McKinley Cr., in low
benches along thecreek, and in old channels high above present stream.
Mining of creek gravels was greatly complicated by many large boulders
and by need to divert creek into large flumes; floods several times
destroyed workings. Concentrates contained gold, galena, magnetite,
chalcopyrite, much pyrite, and some arsenopyrite; float sample of
quartz vein contained sphalerite. Includes references tp Porcupine
(Gold) Mining Co.

(Rendu Glacier) Copper, Gold, Silver, Tungsten, Zinc
Juneau district Skagway (10.65-11.0, 0.5-0.85)
MF-424, loc. 3 (in part) 59°02'-59°03'N, 136°47'-136°49'W

Discontinuous carbonate lenses in Devonian or Silurian clastic rocks
contact metamorphosed by Cretaceous or possibly Tertiary granitic rocks.
Skarn deposits of unknown extent in contact zone contain chalcopyrite,
pyrrhotite, scheelite, sphalerite, silver, and gold. Very rough
country; most of deposits are inaccessible. One deposit (the "massive
chalcopyrite deposit"), reached by using mountaineering techniques,

was sampled and estimated to contain an inferred resource of 4,300 tons
containing 0.5% W, 5.0% Cu, and 7 oz Ag and 0.25 oz Au per ton. Other
deposits in area could not be investigated sufficiently to estimate
resources.

(Saksaia Glacier) Copper, Lead, Silver, Zinc, Barite
Juneau distric6 Skagway (14.2, 6.6)
MF-424, loc. 11 59°22'N, 136°25'W

Northwest-striking, probably fault-controlled, lode about 20 ft thick
in metavolcanic rocks exposed in a nunatak. Mineral assemblage similar
to that in barite lode near Glacier Cr. Includes reference to (Sakasia
Glacier). See also (Glacier Cr.).

(Salmon R.), (Cr.) Gold, Lead, Zinc
Juneau district Skagway (13.9-16.3, 5.2-5.7) .
MF-424, locs. 23, 29 59917'-59°19'N, 136911'-136927'W

Gold in bench gravels on north side between Nugget and Cottonwood
Creeks about 20-40 ft above river. Bench has average width of 1,500
ft. River bars in same general area carry colors of gold. Gold dis-
covered in 1899; a little mining in 1904-05 was reported. A float
sample of a quartz vein near head of river contained galena and sphal-
erite. Includes references to: (Solomon R.), (Tsirku R.).

(Skagway) Uranium
Juneau district Skagway (24.25, 8.85)
MF-424, loc. 20 59°29'N, 135°17'W

Faulted quartz diorite intruded by fine-grained andesitic dikes and a
small rhyolite(?) body. Globules of clay in fracture in rhyolite(?)
contain as much as 0.72% eU (1.2% U). Mineralized iron-stained,

A7


(Clifton) Molybdenum

Juneau district Skagway (24.7, 9.7)
MF-424, loc. 21 59°31'N, 135°13'W

About 1% molybdenite disseminated in light-colored granitic rock; lo-
cally concentrated along joints. Sometime between 1915 and 1917 a
15-ft shaft was sunk and a 30-ft tunnel driven. No production. In-
cludes references to Combination and to molybdenite prospect north of
Skagway.

(Cottonwood Cr.) Gold

Juneau district Skagway (16.15, 5.2)
MF-424, loc. 29 59°17'N, 136°12'W

Placer gold discovered in 1899. No development until 1902, and no data
on how much then.

(Gable Mtn.) Copper, Silver

Juneau district Skagway (13.2, 1.2)
59°04'N, 136°32'W
Joint coatings in coarse-grained dioritic rock contain malachite and

chrysocolla. Composite grab sample contained 0.1% (1,000 ppm) Cu and
small amounts of Ag and Mo (molybdenum mineral not identified).

(Glacier Cr.) Copper, Gold, Lead, Silver, Zinc;
Barite

Juneau district Skagway (14.4-15.15, 7.1-7.5)

MF-424, locs. 12, 24, 25 59°24'-59925'N, 136°18'-136°923'W

Placer gold discovered in 1899 or 1900. Evidence for 2 glacial advances
with stream entrenchment after each; gold in base of gravels formed dur-
ing each entrenchment. Gold-bearing gravels 40-50 ft deep. Mining ham-
pered by floods and large quantities of ground water. Probably never
was much production. Lode deposits near southern boundary of a fault
zone in chloritic schist that in places is several hundred feet wide
consist of barite-rich lodes as much as 30 ft wide that also contain
sphalerite, galena, chalcopyrite, silver (probably in argentiferous
galena), probably sulfosalts, a little gold, and secondary minerals.

(Grizzly Cr.) Gold(?)

Juneau district Skagway (15.6, 7.0) approx.
59924'N, 136°14'W approx.

Claims were staked in about 1900. No report of any other activity.

(Haines) Iron, Titanium
Juneau district Skagway (22.55, 4.65)
MF-424, loc. 18 59°15'N, 135°29'wW

Pyroxenite surrounds epidote granite and in turn is surrounded (with

A3


(Bear Cr.)

Juneau district
MF-424, locs. 14, 28

Copper, Gold, Zinc

Skagway (16.5-16.9, 9.7-9.95) approx.
59933'N, 139°06'-139°09'w

Specimen of a quartz vein a few inches thick from ridge west of creek

at 59°33'N, 136°09'W (16.5, 9.95)
pyrite, and sphalerite.

called Kelsall R.

(Big Boulder Cr.)

Juneau district

contained pyrite, pyrrhotite, chalco-

Auriferous stream gravels discovered in 1900
did not prove to be workable and claims were abandoned.

Stream now

Gold

Skagway (16.0, 8.0) approx.
59°26'N, 136°12'W approx.

Lean or small placer gold deposits.

(Cahoon Cr.)

Juneau district
MF-424, loc. 26

Placer mining near mouth and then
to about 1913.
successful.

Gold

Skagway (15.65-15.8, 6.8-6.95)
59°23'N, 136°14'-136°15'W

down McKinley Cr. for 2,000 ft, 1908

Mining near head of creek in early 1900's was not very
Sample of pyritiferous slate contained 0.02 ppm Au.

In-

cludes references to (Calhoun Cr.).

(Casement Glacier)

Juneau district
MF-424, loc. 8

Molybdenite and copper carbonates

(Casement Glaciér near Red Mtn.)

Juneau district

Skarn boulders on moraine contain

(Chilkat Peninsula)

Juneau district
MF-424, loc. 19

Copper, Molybdenum

Skagway (18.5, 1.2)
59°03 'N, 135°57'W

in float on lateral moraines.

Copper

Skagway (18.35, 0.3)
59°900'N, 135°58'W

about 5% chalcopyrite.

Copper

Skagway (23.75, 4.05)
59912'N, 135922'W

Chalcopyrite in greenstone/amphibolite(?)

(Clear Cr.)

Juneau district
MF-424, loc. 28

Gold may have been found in 1900;
much.

Gold(?)

Skagway (16.9, 9.7) approx.
59°33'N, 136°06'W approx.

if so, there could not have been

A2


Introduction

This report was prepared as a supplement to a 1978 report, part
of which summarized data on mineral occurrences in the Skagway quad-
rangle, Alaska (Cobb, E. H., 1978, Summary of references to mineral
occurrences (other than mineral fuels and construction materials) in
the Mt. Fairweather and Skagway quadrangles, Alaska: U.S. Geological
Survey Open-file Report 78-316, 128 p.). As a result of suggestions
from users of the series of which the 1978 report is a part, this sup-
plement is released in two parts; Part A, which presents summaries of
data to January 1, 1980, and Part B, which consists of reference lists
for each occurrence.

In Part A data from reports released between the cut-off date
(November 1, 1977) for the original report and January 1, 1980 have
been incorporated in rewritten or new summaries where appropriate; if
there are no new data on a deposit the original summary is repeated.
For each deposit the name, list of mineral commodities, and location
data are in the same format as is the 1978 report. Also included is an
updated list of synonyms, owner, operator, and claim names.

In Part B citations are in standard bibliographic format with the
exception that references to reports and maps in numbered publication
series also show, in parentheses, an abbreviation for the report or map
series and the number of the report or map. Abbreviations used are:

AOF Alaska Division of Geological and Geophysical Surveys

Open-file Report

B U.S. Geological Survey Bulletin

c U.S. Geological Survey Circular

Gc Alaska Division of Geological and Geophysical Surveys
and predecessor agencies Geochemical Report

Ic U.S. Bureau of Mines Information Circular

OF U.S. Geological Survey Open-file Report

MF U.S. Geological Survey Miscellaneous Field Studies Map

P U.S. Geological Survey Professional Paper

RI U.S. Bureau of Mines Report of Investigations

Citations to the principal references used in preparing the summaries
in Part A are preceeded by an asterisk.

Because the form of citation used in the reference list for each
deposit constitutes sufficient identification of each numbered report
or map to allow it to be found easily in most libraries, the general
reference list in this report consists only of reports without formal
identifying numbers. Numbers given to Geological Survey Open-file Re-
ports listed with complete titles are informal and are used mainly in
the Branch of Alaskan Gedlogy of the Gedlogical Survey.

Al