> L

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NNV 4> IN -

NA I

IN ANN

AN tt, U#4AS 4

<NA *

Nj -, 4

A 4<> N>

NV 4 AN AN

<N

NAN NI

AN j4

INK

N -

4 4 XFQRA QF CAPE NTAIN

5WARD N NAN

NNNThA

N *«. 4N

AN

IA

>ANN N<IN

NN >NNN INN

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<A
R . I . 3978,

December 1946. *...

REOiT OF IStXIN

LTIM'#ATIg DEPRM OP T tliSIOR. ; WMf~

^. ,grold :E. Heidot-2/ Wilford;H Wrig;,

; -; ? 4 . obert S. Sarxford ; 0-

A knowledgmnents ............. 2 , ., ., 

Iocation and acesblt,3'

Ore deposits ...... , -- ,;

Geology of Bartejrci;,p >.t,-;; 8

Occurrence of deposits' (Lost'Rive 9

; ': '994t; tSM e 'Wta '~gPhkieqw* g t 99s ,1{;;s ,

Work, done~.. $e o ,WenQ 34 iPesis. w1 :v, ......................... 

F < 5 g Trean* :t*:**twI*.. .....................-**'-*..-.u;i8}'..............;-:

DarifiS tollowl

1. -Indexm-Map :of~fWi.,..;.*.*a~~t*sfr 4** ;2

2 ap:e ourlain.; ndei; tSi dfepostzf~2eafJ<lR+ -L2

3. location of trenches and,adt ,eI ti petin,

deposits, Seward Peninsula, Alaska .................. 4 , 

4. -Plan-and'seotlon:1-livia, BartelKLtaaia, Wti

Penihouldi -Alasi .... ;;;..> ,>. .. 4 ,***-t4 I *,,

5. Location and arlalyses of samples in Bartell mine, Nort44",

adit~~~~~~~...,,.........,+t,, 10 .. ,,* .

7, Lovresf uditt;.,"Barta3:l Min-e...-,*t,;>0B<ie84;^i 3'

8. Tr ench -:tjzM4 6 t ' a $t~@i.g '..;W£t;;s.: ; . 04* 04+tt0,0 ,>'D lt,

|~~~~~~~~~~~~~~I , .

;!/ Bi~tba= of*teW*llwolcomb re'taW *ae prov-ided*. .

f allbwitig f oathi'to-4.dtaowledgmezlt- is uied;K 41eqriA*64£o;¢Brw f

Report of' Investigations 3978.It .

2S M~ini g Zaineer, Juneaua, Alaska

ji/ Acting chief, Alaska Divigion, Aining Branch, Juneaut Alasika,.

1253
R.I. 3978.

Ihe Uni'b$4States tlo n of tin has alwpys -1een negligible, and

domestic requirements have been met almost entirelTyby iMOrtaa, t eadvent

of 4wi' iu4zt. 1.- 939brougt a threat to O r. QF.eign source of supply.

and steps werQ taken by Congress to forestall. hrt8ged-Sof tin ani-t4H~Ao

metals. By auth rity of the Mtneral5 Ct, 9ratogio passed by Congress in

1939, the Bureau of Mines a*id-Geologt.caI'Survey conducted inveqtigations of

domestic tin deposits.

An examination of Alaska deposits Was under,**ee in 1940 and 1941 by

J. B. Mertie, Jr., and Robert R. Coats of the Giological Survey.

H. E. Heide couducted a preliminaty examination of lode and placer-tin

deposits at Cape Vounteui. Jl942t which was followed in 1943 and 1944 by a

program of exploratiou.)t . ndrii t1{R area llacer an trenching

and sampling the ;Q4e.4go"

Placer tin, fotiW at the hea& o. Goo-dvin Guljp, Cape Creek, First Chance

Creek, and Boulder , ndpa'e t t1ae ;mine al was deriVed from the

vicinity of lode O"Acstortse-occurreices bn Cape 8$mtain. Placer tin led to

the discovery of atIeastt one -a48itiite' vein byte Qeological Survey and

the Dareau of Mie , *.

In its progrqrof ep -oration: of 'mineral deposit*. the Bureau of Mines

has as its prima) ,Ab* ete the more effective utilizatlon of our mineral

resources to the .qd tha they make'e gre tion to

national securitAq:1i ecort It is the policy of the Bureau to publish

the facts develdt4,9 each t? ttpct 84 :oon as practical after

its conclusion. The Mining Bijr; L4clh Msp*-hef, i; conducts preliminary examinationu, :prfonn the M A -'prory rk,- and prepares the

final report. The Mc 11ig:W1'i~; .,- iG$ 'KiclerboCeC,?ehief, analyzes

samples and performs beneficiation- tests.. Both these branches are under the

supervision of Dr. R. S. Dean, a.is~tAnt -director.

' e Alaska Division, Mining Branch, is undqr the direction of ,. an

ford, acting div ih bcb3e. wh -hvmf wal4A"e&es id in: thls report

were perform6 1at olla, 140., injAer-ths- direction of C. rvIsm Ander pn, chief

metallurgist, 2o!3 Divisiont Metallirgical Branch. -

Ac.QA Aent-is mdbe I6 the Federal Geological Survey for IZo use of

geolofic tpS'if t1i4 -Cape Ia01nteiu tin area end rcports of tin. sits on

Seward P=Wizui a ,)U.V .*. . *. V ..

; feaiackoijledlidnt isjpadeto P. L. Killeen, assistant geolgiSt

ot. the Geolf 6iVcad-'t~e$,whoss detailed stu4 of the area influenco6A the

Bure " 6 O trench oation; to Carl M. Welte, director and

--priacL4>alystUk older <, the >mpire Tii iiig.Go, for contributing historical

inf''¢atien; nd Leo X4:. '0ad 2ke P'0 1ro¢ject foremen 1nl 9 .3

and~ 1944, rcesfotivelytjfrog gheevn sfteu4 ntee a bh data, this report wadobtained1253 . . .
he A /62a /7+ /50 /

~'PENINSUL10-

tA!?1~4

FIG.I1.- INDEX MAP OF ALASKA.aa 4% n~~~~~~~~~
*~~~~~~~~~~~~~~~~~~~~~~

F~~o.,, ,S, _ = f \=t \°00 I400- 00~~~~~~~~

0~~~~~~ b PEGMA^TITE \ | SI| z 0

STRONC MINERALIZEs .1 ; -

/- rSSURE IN CR A NIT PORPHYRY ACIDIC D8

-; 0°° -; NOR }NE~. B SIALT \ -.,ou rcRoPs Or QUARTZ - ELSPAR

65NOA S ADIT - J q.'Z' CONTACT MIKET ALS

LU 3:KY -TR K4,K7' OUA ATZ AND CONTACT MINERA LS

/T ,;, I ,R BSALT DIKE AND SILL

\0 o o -. OUARTZ AND CONTACT MINERALS

LEGE ND

F-" GRANITE

G3 LIMESTONE

BASALT

M MINERALIZED MATERIAL * TIN CITY 0

eM MARBLE 6v T 

0 5000 4000 4

SCALE IN rEET

APRIL 30, 1046 IS S0O

FIG. 2.- CAPE MOUNTAIN LODE-TIN DEPOSIT, SEWARD PENINSULA.
R. I. 3978

; : i -.S~~OCATI0N~AT AgD;S:I-ILITY -; :' :

The Cap' Mountain lode-tin zoze is -located at the extrene end of the

North lineriLcdn Continent, only 3 nilels fzri Bering Strait,:i at 65° 351 IT.

latitu&e and 1670 59' W. longitutd.b It is 107 miles by eZrlite northwest

of Nome, th6 distributing center-for the Seward Peninsula. V tn interali tion

outcrops 6ni the .eat flak o6f :pe oUia4i, inthe arwvat the heAdwatoVZ

of- fouri. croeks, am'ety,'Cae, First Chance, Boulder, and Goodwin. 7igi ros

1- and. 2 show the'gen-eral location of :thedeposit. . - -~; . I . -,..: ..\. ,.:.

Tin City, ow'the shore of the Bering& Se,,' is.noat.deserted-, but it would

provide a suitable base for starting operatic's in the district.': Wales, the

nearest inhabited village, has a post office, a emall trading post, a radio

stationj and e popUlation of about 50 Eskino.-'.The area i's i-solated, and

the common means of crmmunication are lacking. An airplane landing field

suitable for small planes has been constructed just east of Tin City. A

larter airtield!was buit by the"Civil'Aetonauttcs Authority at Wales soon

after the field-wok -for this project'was" completed, Weather conditions make

flying ,in uncertain meanstof transportition,-

A coastwise steamer makes two or three trips between Sbattle and Kotzebue

during the season when the Bering Sea is open to navigation. The first ship

leaves Seattle about May 20 and the last boat leaves late in August or ear.ly

* Septembprz'_: All ship-s are scheduled t&"depart fromithe Arctic Ocean and Bering

Strait before October 6, as the ocean may freeze and,close navig'ation'shortly

after that date. There is no harbor at Tin City or Wales, and vessels must

anchor of;: shoare. All freight has to be lightered from ship. to shore. A

tug and, lighter must be chrtered and cace frpm Teller- to-handle beavy freight.

Eskimos with 1umiaks, or skin boats, can be hired to lighter small articles

weighing less than 1,000 pounds at about $10.00 a ton.

The average freight rate from Seattle to Nome is $30.00 a ton, plus a

16-percent surcharge that is sptill,,in effect (April .i946). Lighterage rates

..at Nome are 55 percent of the freight., rate,

A small motorship carries mail and.light cargo froi. St. Michaels to

Kotzebue every 2 weeks during the open season. This shi.p will also tow a

barge on request. Stops are made at None, Teller, Wales, and other wayside

ports. Freight rates fromn.IXore- to Tin City are about,$30.00 a ton shoro-toshore.

In June 1945 the Alaqka qteanmhig q. a nQn d its postwar plans to

enlarge its shipping faciJ4.tieq into theje wateVrs,.- IfA ~iine were developed

and a large organization, could gmuranee return ,reight to .Seattle, a reduction in freight rates could pbab.Lybe secu edG,,. ,

Equipment and supplies can be traneportedfrqom.Tin:City to the mine on

Cape Mountain by tractor and trailer or truck. A roa&diuitable for truck

haulage follows up Cape Crek1tq ,4qeqd; Qargo- qq4 1,be transported the

remaining half mile by .ttrqti:'. * ,. . .. * 4.

1253 -

* * s.. .. . .. ...
R.I. 3978

PHYSICAL FWRES AIM CLIMATE

Cape Mountain is a dome-shaped peak rising abruptly from the Bering Strait

to an altitude of 2,250 feet,.;SThe ,seacoast on the west side of the cape is

steep and has no sheltered harbors. At 1,000 feet above sea level the mountain

is flanked bV.a narrow -terrace; dibovo this elevatln..:slo;pes are very stoop-. South and east of the mn~n-tnii. the..country i8 chtrterzed by, -1ow. ;el ef ayd

offers an easy' approach to wit thn bne-half ilde .of tho old tBrtall in. he

north side of the nountaein slo]p.s. evenly to Lopp Lagoon>whic.qh receives 'the

greater part of the Cape MountaiT.d inageC The north. slopeq 4re drtined by Boulder, Granite, and Goodwin Oree9,. al'l' enafl etreanm flowing northw'r=4.into

Lopp Lagoon, thence to the Arcttd- Orean,¢ nd-by- iVlag¢eGreek-, flowip Znortb,

west into the Boring Strait. Cape Creek, flowing into Bering Strait, affords

the principal drainage on the south o r -

V6- trees are found tn 'this arai .Ab vegetation is..of. :he, usuaRl tundr

variety.:

The cliltate ti the-'region is arctic' High-velQocity ~-w5,ndq blo-w almojt

continuallyt and rain-axre.prevalent during the short im.-ers. ThroughoutS

the-year, except for a few weeks in July- and August,- freezing tempezrturjes

occur at some hour of the das. The winters are severe, with temperatures

frequently reaching minus 50 F,

Muck and gravel underlying tundra are frozen the year around. In some

cases tundraecovered surfaces are undierlain by 40 feet or more of i:ce, with

only a few feet of earth.

Winter freezing condition'£fron:October to May stopiall flqw in streas

of the'area. Boring Sea i6 froten frdn )rovember to June, when the ice padc6

drift north through the sitaits. ' '

LABOR'AIMD LIVING CONDITIONS '

All experienced labor must' be'Inported,; TM1 Eskimos provide adequate

unskilled labor and are inteiigent-enough to be'trained for skilled and semiskilled work. The natives are fairly industtrious" and, with guidance by a

skeleton crew of miners and mechanics, would supply ample labor for an operation of moderate size;''

Standard hourly basic wage rAtes'arbas follows: -

Bulldozer operator................... .,, $1.70

Tractor operator1......,...... ...* 1.60

Dragline operator. . .......... * .'. . 2.00

Crane operator....:,..........:.... 1 86"

TruMk driver', heavyduty.- .... J......-, 1.40

Truck driver, light eqtuipment ...... ,. 1.10- and 1.20

Truck driver, extra-heavy..,...,,... 1,55 (10 whl.diesel)

Welder, Plumber,...,,;, 4 ,.. Electrician -. ,*. , Gerie`r.5 -helper 165

1adyma~n, O.**?*?**4*v*-t 131:51'

Carpenter ,..4..*..*,1*t O 0 1 075 .. 1.015

1253
PERQCY C&N PERCO ADI

ROGERS '

/ ~~~~~ ~~ IC " ~~TREN \ ROAD _ ............. ..

E, END CENTER POST NORTH STAR CLAIM ~~bINCHR ~ ~ IA.< ~ ~ ~ ~ i1;AND

TRENCH HZ ~~~~~~~~~~~~WEND CENTER POST NORTH STAR FRACTION

N'' AOR TN S TAR CHAMPION

END EN /A'DO C. END CENTER POST NORTH STAR FRACTION

CETER POST NORTH STAR CLAIM ETE ANDN OTCAPINCAM .

IC. CLAIM END CENTER POST TREMONT C C~~~~~~' W. NDC;NTR OSTCAADOITAI

CETR W..EN PS RNENND CENTERRPOSTTRERONT CLA "'"'LV S T REC -II- TRENCH----0

0 100 0

TRENCH -~~~~~~TENH Hi 

\- TRENHEK

TRENCH IC4 

0

~~~~~TRENH 912

TRECH lIF

0

~ MP ~ OTRECANSUVE

-ID, MODIFIED~~~~~~~~~~~~~~~4

FIG a LOCATIO~~~~~~N OF TRNHSADAISAKAEMONANLD-I EOIS7SWR EISLAAIA
R. I. 3978

There. are no houdintfa'ciliti-ea et Cape Mountain. *,Nome, with a pppulation of 1,200; is the 'nedrest' goutCe 4tC nay GWPp . * ti : .iet

and supplies are not stoced by. i m e r w hb-e. bfoukht

from Seaittle" -,

H:STOXY,- 9PRODUQO, o VAL and 0 F 

Tin W~s discovered on tape Mountai in 1903 by a p~o'8eo. tP Satek

who took spocion's;-of the cassiterite to New Ye6k c0ity where su eedd:dInk

interostin macy ;people eMining in .his..disovdry. The Bartele Tin qo, was

forredt, fin which Bartels .i a rortUd to have held "5s pe)r-eot .of tlhe. liOck.

Buildings wore ozected, a nill wasbuilt, nachinery vag fttbl ad dev - rent of the Cape Moimt±in'deposis ws gte. In 1905 comp aw pro.ed ;

10 short tons ofeconcentrate earrytig 64 percent tin and shipped it1 o

It is rteprted Sthai the shipnent was lost in transit, and the conpany did not

receive pement for the d6ncentrat. .-

In: 1909, after e .survey of the property had been made bj Pay, a mining W engineer, the directors.forneda new compaby called the Rire Tin Mining Oo. Very littie' woricwao, o n .the pkett' 4ter that tie,4althogh the pire Tin Mining Co. at one time 'npaged hbther rining engine vied' MX Clelle

to make an extonsive 6e=1wition of tbh -depo bit. ::

The only known .asuivivIng ao iio~ders of the old company are Heny G. - Xrakaur of New. York City: and C0,rl KT. 16ete, 34 Zast Town Street, Norwichtown,

% O2Du:f. ' Jt;., ... Conn.:

In 1909: the Bartels N.n MIning. Co. patented 2W+ iode cda1±n :- mil-ite,

as uhown on Sugrvey 336, A and B, as follows: Rogers,. Incky quen, Tremont,

North Star, Champion, Bronx, `Daeg, Birthd,-, Venus, )"s Jupiter, Saturn,

h]xcelsior, Aurora, .Elg-bn, Washington, Adams, Jefferboh, Madison, )onOne, Planet, Rusty, Tiein Quartz; ITQbpe, Miuickel, irroticsu, Nortiutar Martha, and Yourth

of July lodo claims and the ill-site clai, Thetorhwetern same C

peatetitee. 7 lode claiims And 1.miIl-.s-te, as shown on OStrey 337, A and B, as * follows: Aspen, Sun Drum, Canoe, Comstoc1;, Sunrise, Fairvtew, and Arctic lode

claims and Bnrtelg mill-4site caim, Tlhe toax area of these 37: claim is

456.81 acres.

The principal mine workings are on North Star and Lucky queen claims, (see fig. 3).

It has been reported that Pred D. Grade, '545 West 111th Street, New York 25, IT. Y,, aiid a6sociates are negotiating with the frpre Tin ing Co to

purcha ee the CBrtell. property. ,

TIhe TU. -6. Ala:ska Tin.. 'ining! Go0. palte& the f Alo ug Isimi; Dieter No, 1,. .Dieter No..2, and .ieter 3o, 3 ibis andi the; - . mill uite,

Patent SUrvey 409; A and -;lq: qs ard dot6e , 1.908 the tO;ei-a

is 33.95 acresPlacer oporations weO- carried, pn! in the:' all cre*:e.a n City asx

late as 1940, but nore recent)4' the .ony paer;'mIning h- been by hand metbds,.

12S3 - 5*
R.I. 3978

MIl1T W0BKINGS

Ako* ~~qqns4Pa levb aA l1eval. Te , , ~~~~. # e. .. 1 ,

ge~cti. .tetX i onfgor. 3 Te I W~ ~een Nert >he

Star,= and Lowest Oftur edits at 1atns 8 fret c 0

tively. A raise near the linestoze4.granite contact connects the Lowest t

with a sublevel at 819 1 r*wtoi h a dit can be reached by

an inclined raise. The genera trei. oo torth ttar and lowest adits is N.

54. E,~*o~eoot~e .y Quoeen. e t b!z , 73 0

.through ;.section V .A-plcW an. 

athste fti-w. t* sbo.w on i wo,- 4M . - .

:A 8 ::^t ¢i fo t te :bear we LiN1* :o. a'

~ti~e grf 6Z fe~b, thene ~ O~~5fe.Te = OQ$CW -19 ~endAn t 

20e of it . v4to tO.ft.w .fte T t ot

2recQ to on 0a br- oo o a$t s ibeae s rt a .itnc o

Sa~bl eel workings aonsist of 66 feet 4d dftiga3;Q9s fet of cr:r

cutting. The crosscut parallels the Lowest adit crosscut, and t.e drift has

a bem0ii9 of X4 17t- V,,

f .y-£>five loot~ t* >MbQ?1 Tortzal- 1 i-s a Vtwie jofio th e.

Star- a; b* 4 pnt Wfes t port a diifV,ears ;. 45

W. for 28 feet, and at 116 feet wm - o1 aioter .drif4t fbfers north.

25 feet; these two drifts are Ioined at their extremities by a '12-fobt crosscut,. AJwewl m.o at lw ae ore., wt .o 8i004. drift.,

At a,-point 60Ofeet farther isida drift ber S . 10° C. for 38 feet'

along a system of fractures. A F-inch stringer containing high-grade tin' W

OMr- W . A O..- f e- , drift. .

5DI entire, wor4-t t N Tot*th .Sta a %:.; :o t fe; th- t .

the .Low"t a4it . 0r feet. ,

A~~Clqr queen pn4 fet porAO t

.j-Fucky +:on pAi,4 13 S . long, .feet' 2; fr tho

short orosscuts ^e;tend l0 feet ;to the on. e;ach side of the drif,

teZ..a .11W cIns troz'. 1 pfi.ud with ice,'

and no attempt Ras made to gain access.

h 5r f the area is s aistd b b the thmtain Geological

Survey as foflows: -

A1W 1aa~ge grai5it inruume-Qonstitutes the core of the mountain.

JIokr-daring'it on e'the nrth M~s are jlim~b: bed no~ic h

which once coverea the, grit, stil remain Tekgani'Ve is oi1se*y

associated with grani tica veins. Both the limestone and thVeganttO

* ~~f. Stet dw~iw& and Cathoart, s p4 the7* a ~Tlan sitO e

:Alaska: Geol, Su1rvey Bu1. 7-

3 3w 1 22, pp. 9 0i'.

1253 6
0 "w

LgGEND _ __ _y_ ___ f_

GRANITE

FRACTURE SYSTEM

OVERBURDEN

VERTICAL SECTION SHOWING MINE WORKINGS PROJECTED ONTO PLANE A-A'

/ < \ ~~~~NORTH STAR CLAIM 1f \

\ ~~~~PLAN '

FIG. 4.-PLAN AND SECTIONAL VIEW, BARTELL MINE, CAPE MOUNTAIN, SEWARD PENINSULA, ALASKA.
R.I. 3978

show-contact metam9 phic phases. .-f to'mgt rock of the area is an

intrvusion of bll^ackoliviri po p*, whe form o dikes cuts

both limestQne a na granite * -

The visibleportiiA jof the granit tintrusion is. a fdmi-h}aped

mass about- 3 miles it,diameter and over 2,OOQ f et high. 7le contact

surface with the .limiiioi& 'appears to -be ne a ir ical on the east

but dips more gently to the north. It is irregular, the granite having

welled upward into the limestone along vertical planes and also between

the limestone beds. Occasionally limestone blocks are found'which

foundered into te.gr anite.. A4,0l4der of g'ahi tP on the dump of the

United Staje Alaska-Tin Mintng o tunneX contAins0a block of limestone

about 6 inches in 'diameter. Be twee a (caled Boulder Creek on

later maps) and Village Creeklr an' tea of 'ever4lhvAdred acres is underlain by limestone partly submerged in the &ranite while it was still in

a molten condition,. the granite 0:top of the mount4n is covered by

several feet of limestone overlain by about. WO foee of fine-grained

quartz-biotite schi'sts.***

!6ie limestone at Cape dimtain is composed chiefly of calcite.,

wih .some admixture of qu'rtz. InsoloT it is generzlly white to bluish

gray. .#ds.of quartz sand, now changed to. qyartzite, averaging about 5

inches in thickness, oaccur at intervals of about 15 to 20 feeVt**'.

. !ast ..of;;the~ , ~aYt.5 t the limpst~o e beds dip toward the

grantte at..:. g:Ig~e o~ e:oou0 Sl~. 3etween Lagoon and Urlukl Creeks

they-dip t. 1North Qf the granite int-utn e dp n4orth .away from

.,the granite., It does nQUt zpar that the intrmsio. of the granite has

produced the present attiltd f the limes e beds..

reS ^ anges which ' 1the hao. stoe uffered becauue of the

intrudion of the granite fall into two classes - those which involve.

the introduction of materials and those, which do not. Ihe changes * i hihid do not involve.t ie 1trdut1on ofat -~ls are as follows:

Na Tearthe oontcm the m to e has been a dato ense white

quartAite by the recrystl -tionx of the quar grainas.. Wqllastonite

has commonly formed by a reaction between the ceacite and:the quartz grainsa and locally the qwart:zbeds have, been changed completely into

;- wo16stonite' t calcite an Ifrom quart to yollastonite

involves the lo of: a . dse from ecit k a. the combination

of 'the. lim as

Close to the coate. the-limestone v^s locally invaled. by hot

tin-bearing solution 4 which converted- itt.iato-a heavy medium to coarse-

-grained rockW The altee zones appear to havea maximum width of only

:--a few *peet- and re fbn& -I d±atel adjacnt'to the granite and along

fissures that cat the, 1 toe. in the vicinity of the granitet**s

The pracipal mTherals green 6othis rock. are green pyroxene Pnd green

: toimaline. Mitor c its are pyrite pyrFotitea fluorite,

scapolite, accessory sphalerlte, qidiattz, and cassiterite**s. The

cassiterite is yellowish brovn, fine-grained, and irregularly distributed through the rock***.

1253 -. 7-
' a:2 tin-bearing aolutins, t-that,.aterel, the 1imest*&,i aloig 9thO

greni *be 'oitac: . e' also .affcted -ke bowa r~.qn ote granite

itself. On the dumps of the Empire Tin e's' 'o.forkinr~g*.8s oft.

granite were found showing a local fracitring along which minute seams

of das'66r*kte and tourmalinelhad :been i;trd 4 g. yormod a

cemont 'ld, also irepl'.ce':thie:feldsparts.:. ,tyrite -in mi.nule-scattered

graini, Ac646fiied teece&±tthits an4 to li,., : * : ~~~~.;; . . I .. , .. *rr.s. - t i -... ;- * 

Geolor Q; 'grtil Xire ; .

aineposit6i at: the Bartell'mine-.,cur in proeimity to th-.gr;anite- ;lini~estoneo cnt''c~,i andi in both: grenitin4; 1iUe .tO , ; cons eatUre

are l1¶2mers lge'stonr pepdUQe .n... iie rttte Mg 1n ; few p),aces

occu.r as acompai&tvi-Vay 1arg blbks mf l4to1e. .. ..

;: ii d~epositibn ha~occurre~d vAi~ng. weak; ofrth.-sou, ' ensi-on or shear

fracture§-:i~n the granito .fid in 'the, litat~onq. .:; . , -.- ;

Both rock fracturing and mineral deposition have been weak. Zradtures

in the granite4.appeat to be lit-tlq.Q fe. minor-shaar.planes. In most

scdeS there is8 very little indieat$pn of mineralization or ateri.tion of

the wall rock. No large fissurea w oberved in the granite. tin 4eposition along the shear planes is weak and highly lrregular.

Fractures in the limestone are generally na-row, eltbo..locally

they may be extended by brecciation a4 e ent. .ew of txem appear

to be over 100 feet long. lI1nezatilat.i4i8 usually mors ponunoed in or

adjacent to the limestone than .F thq gran te; and qi:artz; -dticnolite',

tourmaline, limonite, and. eppsejrWufu des 4.more commont. .

At several placds,,uzdeogwouz4,,4q Vt.rtngqrs and fractures in the

granite were observe& to ter6i16te ab tlyiat & limesto contact.

In th.,varteli. mine, mineral solution, t at-bhae rp t asc6&ded locally

through fractures in the granite. WhereV 4 favora4li chaniels, encounter

limestone ,:-the solutions.have followedi theiie lar cobtact, occasionally

breaking cnpse, *acturein the limest&.0-

The *:: torfl~ex b small nt of in lnt~vi both dop4!lt

.r -extent 4f iii.pL.5 ,d~ps appeas

granite and- limestone, It: appears thbt .dojogs,'.in_ 'ime I i t ,t

Bartell mine, will be shallow, a8 at this location ,.4 lmeezig consists

of small blocks or roof pendants in granite. Thel'ti. a pssbility that

tin may occur east of; Bar,.tell.mine npar. the head~of Goodwir Gulch, where

the limestone ispparentI of consi.d 4at1 , .

7 AS, minera X.. *.'..o As mine~ral expoquree .in the Wilte.: onW Aoited, Zooic inferences. -re. waprant ed, .So_-orge economic as i have beeA' bb~erved iA the

granite: If .in-bearibng. s to. have zsasqi a 6 g fkta'ibie 'Chllan ivls

in the fgrani'te somne depppo tinozu~.ay o.c c¶xr4 et- depth;. 'btt tihbere is `no

evidence to,.uaggest th;t..t*e id1t .pe 047, rgo nto f obs utures.

.... t. . .*. ,'7i'.- *@...- . . z 24 , . . . - . ' :

1253 - 8 , J .!.. C- 0 4A. , ' .,
R.I. 3978

Sur'face data,, in regard to "float" and placer deposits, do not indicate

the pre;e'eof any rLe>tin outcrops if the pwe*$.;r pro .- it is

conclud4 d from- the dit:Kts'ition and charatter of saface float that a few

outcro-, other than those 'now exposed, do-ex±Cst, but from th0 ,*evi ence

theso axebo'ught to bo small.

Tin placer mining has been carried on almg CAee and Pirst Chance

Creeks and also along Goodwin Gulch. During Bureau of Mines ivQjtigation

of placer-tin deposits in the region, several small areas of virgin gravel

were found near the old workings of the s.euton ei.$.hree.eod .above. A.

small deposit of placer tin was found in toulder Creek valey. The graeils

of Granite tod Vi~lage Creeks were.fQund to containct.lly troes of tin.lJ

Bocause an examination of mzuch of the r su face is Qbed by debris and only a few mineralized, points can be obaerve4-widerground, it

should not be definitely stated'that undiscorhred.Aeposite do.qr do not

exist. .Howvever, as stated 6bove, there idinothing to suggest .that.intensive

nminoralization has takediplace enywhare,

There ig evidence'iIi old prospect 'pita near the head, of Goodwin Gulch,

as well as in trenches KlA and E5 excavated by the Bureau, that several

granitic dikes striking north to northwest exist in the tin-bearing area.

Those may be genetically associated with tin deposition.-

A limited similarit* in geolbgiaal'structure exa-sts between Cape Mountain and Lost, River tin depositt,, where the BRweau of'Mineg has excavated

over 5,700 feet of trenches, completed 22 core-drill, holes totaling 8,693

feet,. and collected 1,685 samples.. , xcerpts from Report of Invystigations

3902, Lost River Tin Mine (in prse) a.re quoted'herein to indicate possible

subsurface conditions at Cape Mountain.

Occurrence of Dfositi (at Lost :Rivey)

Thres principal types of d-o0itsuoccur, namely in acidlc dikes,

in the contact metamorphic zone, and in the granite. Deposits in the

acidic dikes have been descrtbe4,in:'hanr- Gaological Survey publications: and by engineers in jnivate practice; but. previous to exploration by the Bureau of Mines no ore reserves ere known to exist in the granite

and contact zone.***

Contact Me tai Zne (&it lost & ver)

Surfaie'oxposure and di amond-drill cores 4how, the zone to be

composed o. complex group of roeks and minera)s.g Originally limostone, the "country rock has been brecciated, ,pybably both by faulting

and oxploa.ver forces' from th-4 granite magma. ,c4dic and basic dikes

of all sizes-have intruded tIe limestone an&N i; manyr instances, PorM

a matrix around limestone fragments. Nearly the entire zone appqArs

5/ Bureau of Mt'nes, War Mineral' -ept. 164,E Cape Muntain Placer. Tin Deposit:

May 1943, rewritten by Wash~ijgton staff as report of investigations.

1253 9
o ,,ave ; b ,t b es s4, i . o . t M -. have ty~~~~~~fl S*''he ; W /' 4 s ' *t

a .d;e*eplaO *d tite e?4 rer.s tin f

been fluorine, and locally the rock 6 6o 41y -o' for ..

Slickensidle and abraded brenciab fragments were `6b ieirrved'iiaVt.

Plces' in the driU ,-s ndiea'vw tlhe presence of mAeroUs

Dv-si in i . s ii- ) * . ' -~ ~~ ~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

, ^

:ite -idwt ittop1the'ost er m it=t v

en oIntered in Bureau of Mings drill holes hndhas been dhown to be

tin*~bbaitng, Ne?2 it8" aota~t vi *th w iwzestone we groite iS

higilr dtir~i and is senty kiWn it lesse flu8ritpas,

oin-I wmlIl qaantitiee otf in. g senor a t h gti, ,s iogrevsive y less altered wi th dtac $ j hout o . 8

holes disclose that the stroagest tin mineralizatibn i6 not at the

Obact, in-a- Ute, g=anie . at' a Ra-: 4stance

of 40 afeet so the conta.; . " 

+ Iri-Otion o Ore.0 *6-i. -. -

:lgr mall ove bodies are U te&b i-eau : i in thel

~o.~-calle4 "ig Le4~a' ~neshown di. sid. ihpa;e r t is. Ov±p"ed Iin only the

tt ta lt-te- it- is re'r0 byt BU:h -2Bu e 39, 40', 41

4Cea 439.44, 415 4-';6-4;', (See ig4 . .), -s theoe p n>o tn obin

-n ore bO4Yd.#o finiteo width or l.e . . -,.

Another alleged ore body is indicated in "Broolyn" 6rosscut on FxTorth

Star adit. A length of about 30 feet i,.s r sente tby-peo ries 51,

89, 90, and 91. This same shoot Gas--sampled in theIieiaze. ana on the sub-

.leveol. Saples repIe t sboot a-s sho ft figres 5 and 6,

Sa-Mles 10 and 19 may ia e &W. ht-in ha 1th Str adit,

bu; the stictwure is very weak,' SaPle analyses shoiw ifigu 7 idi cate

no corresponding values in the towest adi t. -- 

The surface vein discovered by combined exqploration of'the e Bureau of

Mines and Geological Survey is thsemo16stig pvt 4Hpostgfound on the

Bartels property. This iS a quart*-mica-cassiteritO vein 9ocu±nriflg principally in 1imestone, with some tin- wocrring in te aeacelt granite.

It is approzimatelt 150 feet in 'l.engthranges fr fV nh to about

66 inches iruh ewidth ad ha average d of 17 .aitrit .

occurs as coar'e graiins -end large naTggeth bot w.d mica. Theen 

~.;.rage of 18- samples ooiedte ad aniye by tie th eau is 734 percent

61 Heide, Harold :4w KoteT n ard P'enzsujla', Alasd4a: Rept.

IneAst Saof ti0 3902.' n Y 'ess. , -';

1253 - -lO
13~~~~~7-

NO.WIDTH I ~SAM 

PERC EN 

E 

T 

ANLY

NO. WIDTH P NT \\

__IN. SN NO03 I N. S N W O q3 \

10 II e.2a C0.0 5 36 10 I0.05

11A 2 8 < .05 3 7 7 < .OS 30 89C

I 11 41t < .05 38 27 < .05 \ 9

IIC 64 .06 39 50 2.15 <0.05 89 \

12 14 < ,OS 40 48 1.21 < ,05 29 89A 8 mm I a

13 12 .< .05 41 53 < .05 282/\\ 90c 5I A 3

14 la < .05 42 3 < ,OS 25 \ 49n9 B\\

Is 5 < .05 4 3 3 10,90 < .05 \4\ 0\ i-20

86 Is <.05 44 40 1<'.° 27O 19\j2

.171 12 < ° |0 5 45J 40 <.05 39? las~ la 6 .07 46 40 .26 C .\S 19 8 6.05 .05 47 40 <.05 4

207 60 .8 < .0S 89 I 8 < .29 .0

28 39 ,27 < .05 89e 31 .57 < .05

29 9 < .05 89C S0 < .05

30 63 .22 .05 S 90A 59 .06 24 12 < .05 518 145 8 < .05 40_ 0 1

325 28 < ,05 90C to <.91 < .0555CALE Of FEET 27 < .05 53 234 <OS <iO

34 I39 ,205 < 98 301 2.09 < .05 MAY 8, 1948

35 4 < .05 9 4_C F

FIG.5.-LOCATION AND ANALYSES OF SAMPLES IN BARTELL MINE -NORTH STAR ADIT
X ~~LEGEND|

mL I MESTO NE

G< RAN ITE

SAMPLE ANALYSES 2BSL 0~~~~N.WIDTH S : Li. M I NERAL IZED

8 5 1 7 <0O .0 5

88 10 < .05

87 <0 00 ,0580

8 8 12 92 10 << .05~~~~ST-L .0 5 SCALE OF FEEET METOY

92 < 10 ,05 ~~~~~MAY 9, 1946.

93 30 < .05

F1G,6.- SUBLEVEL, BAR TELL MINE, SEWARD PENINSULA.
7678A 80 SAMPLE ANALYSES

7D t77 NO. WIDTH PERCENT 7o8A> 788e f I N. SN

4. - 78C 54 12 <0.05

79A 5 5 13 < .05

79C 5 6 5 <.05

ale t/$1 57 5 < .05

81 A 7 58 25 <.05

C' 7172 *~~~~~~*~~~70 ~~~~~~~~59 10 <.05

70 25 < .0S

61 13 < .05

7 67A 62 24 <.05

683 < .05

A ~ 64 17 <.05

158 ~~~ ~~~~~65 6 < .05 0 6 _~~~~~~~~~~~~~~~~~~3 ___<0

6 7 e 2 4 < .0 S \

67C 24 < .05

68A 60 < .05

a88 14 < .05

69 1 3 < .05 8

70 IS (<.05 62

7 1 20 <.0 5 61

72 20 < .05 60

73 35 <(.05

74 1 2 <.0 5

75 20 <.05

76A < .05 7

76e < .05 LEGEND3

76C (.0 5

76 D < 05 LIMESTONE 83 A

77 23 < .05 RANITE

78A 45 <( .O GRNT \ 

78B 40 < .05 BASALT 84

TSC I < .05 E.: MINERALIZED

79A 57 < .05 MATERIAL

79B 24 < .05

79C 24 < .05

80 <.05

81A < .05

Vo1 SIB < .os wo 5 ~~~~~~~~~~~0 40 mowr so

82 31 < .0 5 SCALE OF FEET

83A so < .05 MAY 10, 1946 8 38e 40 <.0 5

FIG.7- LOWEST ADIT, BARTELL MINE, SEWARD PENINSULA.
0081 1 4 2wW96 9A

99 3\ : 32 / g,

105 mu/

107

SAMPLE ANALYSES

NO WIDTH PERCENT SN

97 12 4.14

98 12" 14.44

99 12 1.99

100 12" . .05

101 62 3.05 '/

102 1 .12

103 12" 1.12

104 12" 1.47

F05 12 3.58

106 12 32.93

0 0 tO 5 107 12 3.28

SCL OF FEET! 108 88 5.12

SCALE FEET OF 109 12" 3,73

MAY 13, 1948 110 3 3" .2

III 22" .12

96 10 14.57

113 24" 14.86

114 124" 25.02

0 ~FIG,8- TRENCH SAMPLES, CAPE MOUNTAINI, SEWARD PENIN.
^ - ~~~~~~~~~~~~~~~.Z. 3 9 v-.

The lo~cation.and analyses of these samples are shown.on figuare,8.7

The vein w~vs f t"8expos0edby two,.bt.ldozer trenchegs KE 'a4 gZ e2cavratq4

above quaxtz-cassiterite float on .the south side of the head of Goodwin

Gulch. ,renches Xl and K2 were.excavated in 1943, and the following

descriptio~n was written at,that time. These trenches, as shown on figure

3, are In the area immediate-,..; orth of k.cky Quseniwqrkings. Teneh..l

is 140 feet,.lozg and trends $X,,7.° W.; K2, the more westerly, is 135 feet

lonu and tren.da N. 180 W. , 1e old. Lucky Queen tunnel trends S. 780 W.

and its poxtal is. approxima tely .90 feet from the south end of trench B1.

Irench K1 is in limestone,.excqpt at the sou ten4, 'wher~e. diintagrated gianitaewas exposed. beneath the ' imegtone. Bedrock surface in this area

-w& t o 1 feet*bVelow.ground surface' Trench K2 is entirely in soft,

disintegratd .ranitt,, although there. is evidence that limestone occurs

immedia 4>ih-south of :tho .tiroh, s. ,..'

... Iha,,we~.'..t1w~l of. C yielded, nuggets of cassi~terite at points roughly

.4, 27, 29t~, -36, 4.42,50, and 50,'fest from the south end of the trench; similtar~ tin ore wap -uMd, on: the qsat. wall 24, 42, 67, and 82 feet from

the south endS'; Th vein pinches and",swells and trends N. 500 W.; the dip varios fromz&6Q° 1- v:tical. , te,;tte. W8 eqqppi . the Aorthwout

end., of +the J~o.dl . .tqi. .. ch quVaar veins separated by a 6-pinch limestone

bani; the 'casi'ter4te, wa.zonfined .to. a 1-inch border adjacent to the

limestone.. v.pe_ e.ouatheast *.to on the west wall of trench K1 was

5 'inches t wide and p'~ns's.t'edofvein quartz and 3 inches of cassiterite.

Farther southe st izA thp flopr of the.-main -cut, .i-.t n.rrows to.l.inoh of

massive veins atori'Oil. lbr' everi4l.f et in l'ength, and, sttill farther southeast, c~ogst'ste:of iqhlte m'ilk 'quartz with considerable cassiterite. A

4-pound Ocaaiterite niiggbt waOs. found in place in the west wall of the trench

Jtst at bedio-e suikace. "

Trcnch K2 at a point 35.. et f ro. I tse soueth_ xreml ty,, exposed tin

ore dis'seitingti& inigdt, disit.erated g'aniteq :lhe tein exposed i . trench K1 evidently does not exteig''Into-the ngraniie-cuteF 'uzless it is''

represented by a narrow q~uartz-tourmaline vein. 198 feQt north of the

south end of K2. Hand renching siigested that the' course of the vein was

somewhat curved and, tended to strike more northerly at the northwest.end..

Bulldozer trenching during 1944, along the strike of the vein, revealed

a 0o09whMt dayeringo-cioa,-e. 'Xli etp sed th+"veen -1a. for'SO `0feet northwest and 66 southeastof tho 32Wfoot statibn ntl, whicih, for4he'purpo'e of this report, is designated station 0. Oourses northwest and southeast

,.of ,etationO .tdesl ri'bib a~filows: -'b .

Course Bearing Length . . I~escriotio '

o - 1l. N. 46W W. 15 ft. First 9 feet consists of 2 bands of

,, :-,, -,,;,, ::5}: ' : . -:: :V quRT z.tz sepsartx d -by';itfrgetbts of,

'' ;-'' "''' 'line~tie. ;' bartz':bnds co'ntaini fai-i' 7

'' *...'. ;'' ' amoi; ' of oa08i terile! Remaining'- 6 f eet

'veragesr as 'iches izi Zdt and nsfts

-of aidcaeous Avein tatenial fith high

.... " - .: * '' ''''";' '''a6ss'i~terte'oo ;; :-." fAip'is nt.@. vertical.<

1 f w b 2 : f *, U

12583 - wr:.- - l' -'
R. .I3978

Gooi, L Meth -lesoriion

1T. ;4XPZSP We 4 ft.4 in. 1-4i aceots materl comtain n6dules or

aggregtes of castiteitoo sistently

:- : - -; to btstation 25 whervein pdtnches to a

narrow seam of micaceoiis roo.

2N. -- N. ,3N. .2e0 l-. 15 ft. 8 Ii Veini- represented by w $0n (1

:to 2 inches wide) of'alt~red rock,

- : * E namely, chlorite, containge fineFgrained toairm~ine and scattered nodules

of cassiterite.

4. },;T 4 -Di200 W. 15 ft. Vein contnu 'ams as- 0-33Y. -Dip 2N. to

*:: ; : ' - -4N. I's ap0roxba. . Sta. N.' s

: : ; mo'st'northwegte&ly point at which vein

cai be pbsitivey16 identified,

0 - 1. X. 40° W. 12 ft. Vein, ,2.J6' unches wide,, tonsiste largely

of milky quartz contaiing some cassite-

- . ' rite anid m~'laceous iih*'ia1 containing

cassiterite nodulei. Some barren# frao- S

: -" . - menii;B of | limes tbieA are pr'esent in theW - ' ' + ^ * D - 0 ' ' me; e ap si;'vYerticpi.L

IS, - 2p: N. 8O W. 21 f t', 6 in. Width of vein avea-ges 12 inehes. viin -9 maiittr- is almoest '6tire:4rIiy icaceous'

rokc with noduiles o*assiterite nd'

o ; bare , rien fa ent6 bf wallJ roc.

2S. - 5S. N. 480 W, 2t2 f't. ,6 in, ' '">Vein' materidl i's simi1ar tb *thatwbetween

-taS1iioi1 S and 2S .'bu't' iics to '

- '.'" ';'. ' . inchn Iwidth. Vin pQtei4 ',fin~ -rained daassiterite thiere.. Jst ,een 66 feet

from station 0.'

A nfmbot' of piecrt of botb.,*llk rock anO.-cass8iterite nodugl. show

sliokensidos along tIe wtiie'vein 0poSurW.

W.K fO ONTE rY M., BU U _v .NIIs - * .

Trening

-:Tweutv ereqeavatved,. witI, a a' ombin&. length of:3,690

feet, and 6;10: cjic yards of eart endook were moved.

Trench 11 was 106 feet long, 9 fwt- ie, i.and. 8 'fee--deep whei excavaiO

tion was stopped presumably about 4. feet above bedrock. Frozen ground

was oncounter .att a; depth of 5 feet. .: : * .

Trex0ch- w"a...119, f et long, 9g ; fet wide, and 6 feet deep. At a

de- feet,.,beorek %ofr-6 ,As epos,9 by bulldozing in the north end of the

.trpnch. Hear thesgnth ,end, it wqjneeessary to excavate for 1 foot or

m.ore. o depth. t. .reach. b-.droc*c. 4. -trench 1 foot wide and 2 feet deep was

dug.76 feet 1. ng,. *At this iept4 .the bedrock was blocky, but no attempt

was. made to reach saqld rqk*; As menallic minerals were seen. A small

fRult separates a reddish and a dark gray limestone near the north end of the trench, The reddish lmestone encloses milky white quartz veins, oMwiof

1253 -12
R.I. 3978

which is 5 inches thick. The others are much thinner, and all contai~n a

green mineral resembling serpentine or chlorite. The average strikoe-.1

these stringers is N. 450 W., approximately that of the vein in;AK trench.

Trench 8 i1 '1t-ed- at a point on the hill where overXbur'dS-i is

e~dr'sive. 'ow ncountered at a depth of 9 feet, %(i tI1ech

ii 21 Bfeet long; 10 feet vide, and 13 feeb deer.

Ttench l is 140 feet ,ong 9 feet wide and 2 feet deeP. A goad -. ade

of casiteri-te float was totid befotre bedrock was reaoad, Davi hand-tronching

revealed a cassiterite-bearing quartz vein with a northwesterly trend.

Trench E2, roughly paraileling trench l',. is 135 ieet, lon, 9 feet

wido, and' 4 feet deep. ;te bedrock, a softt,'disintegrated) lrotntained

granite, was found bea eto brren'

Trench K9, 60 feet 0southeast of K, was attempted'by hand in:October

1943, but i.t was found ne rly impossible to 'b'eae through the crust.

Excavatiron to a depthof 5 feet, a length of lPQ feet,., and e.width of 10

feet was completed the oollowing summer.

Treach. 3., started in October 1943 anid completed the following

summer ,wae dug in an attempt to find the source of cassiterite float on

the slope south of the North Star adit. The trenich is 3 feet deep, 10

feet wide, and 150 feet loig.

Treneh 3 exposed. blropk at an average depth of 32. feet, and. over ts

,.entire length.of 1,057 feet Excavation was. easy at the north end. b.t

was hampered by large b at the south end. Test pits osunk to 5 feet

in depth showed no change 'in the cqmposit io o.f the bedrorck meterlalq.

As.de, froam one piecer of cassiterite-bearinggranite andd some mlionite afew feet from the north granite-limestone co-ntdct, no metallic minerals

were seen.'

'Trench 1O, situated 'adjacent to and 'at the northwest end of ElA,

.. a~ppantly r'e~ve~al's a spur off the main veins,in.ElA, This trench is 13

feet long by 6 feet wide and 3. feet deep.

,Farther attempts to discover lode cassiteri te by trenching met little

success., The.following tr s were excavated:

Trench. feet Length. feet Width. fieet Deuth. feet

* .,, .. 8 . a. . .95 10 ' 3.0. XB __,95 10 3.5

*6 . :131 10 6 0

K4 300 10 3.0

K7 200 10 3.0

,12. 100 . _0 2.0

K13 30 10 0.5

K14 80 10 2.5

- 15 60 10 1.2

E16 50 10 1.0

1253 - 13-
R .I. 3978 - ' .:-

Drifting *

Before .gamlaffip in the Bartell mfie it was neceseary to remove snow,

ice, muck, .and&froben gob from the North Star and Lowes:t ditd'. SPMbhad

drifted into the North Star edit for SO feet from the portal'and filled the

adit to a depth of 3 feet. At the entrance of the fixisk winze room a mass

of ice had Sformed, Completely blodci'ng the drift xcxe~t :fOfta 2.. by 2-foot

hole. A wedge of ice, 5 feet high;'t" thies point 'a;& tpent to the drift

fJgor .in 40 feet, had to be picked 6uit Xt(6hw1 moi,?t by means:*f

a wheelbarrowd

The drift walls were heavily coitk with a luxuriantt-growthUof ice

crystals, which extended about 300 feet elong the drii't. At a point 100

feet from the portal crystals in the form of thin hexagonal plates and

hexagonal prisms growing perpendlciulaW Uo -the walls had attained diameters

up to 6 inches.; The crystals were brittle aed easily removed by scraping

with a sbovel.' Un~erneath;, however, was a fenaciou opaque film, of ice X

1 to 2 inches thick, which was removed from the walls by picking. Eight 0

hundred cubic feet of ice was removed from this adit,

In the sublevel it was necessary. to remove snow and ice ih a similar

manner. During the summer working season snow and ice crystals continued

to re-form on the walls.

The portal of the Lowest adit was caved. After drifted snow was

shoveled away, the adit was still blocked by muck and rocks, which were

rempved by using shovels and wheelbarrows. Behind this, for a distance

unknown at the time, lay frozen, caved slide rock. As it was necessary to

support the roof in some manner, 2- by 12-inch planks were used in forepoling through the sl.id6 rock. Progress was slow because of the frozen

muck and large bouldere. A hydraulic Jack placed ainst the cap of an

old set was used to advance the planks into the muck The cave;-in extended

two sets, and behind it solid ice blocked the drift completely. An advance

of .l feest ias made through the ice before a# opening was found between

the drif-t roof.and the i"ce. This permitted. air to circulate through the

mine. The thickness of the ice.diminished gradually from this point, but

was still 2 feet thick 160 feet from the portal., Throughout the remainder

Of .the.mine-the thicknesd-of ice averaged 1 foot.

Mine rails were found on the drift floor ready for use. A mine car

and 100 feet of mine rail were brought up from Goodwin Gulch and used in

transportingilce from the mine.

Two shift.s of two met each were employed in removing ice from the

mine. On some, days the advance would be 15 feet through ice 3 or 4 feet

thick; an others, when the.workmen were digging in a tough, rocky mass

formed by fallen mud from.the roof, the progress, in terms of measured

feet, was negligible.

After ice had been removed the drift walls were cleaned in preparation

for sampling4

1253 . -
R.l. 3978

Sapling of the Bartell mine workings was started September 1, 1943,

S~~~t o~~ r Y .;_Aai i lin,40 g

was to bc done, and the sample ceatt b *e foreman. In sampling mine worldngs, c s were cut 1 inch deep and 3 or

°. . oi44ge, Oe h~dfi sj ior~e dIeed, t , e location and analyses of which are shown ou ; 1 > 6, ; 7..

- Thre. trench 1 wprb e-.leA ~ 4~i ~943. ejidA19 >in .th siMmer.of

1944. These were cut as channels 6 or 12 inches wide by 1 in.qk4, p. Location and analyses for all except three are shown on figure 8. Samples 94' and,, 95 were 1 tZom ;co 3+ ~fee ¢ t *- re tirely, from the south end. Both-a p, g t-li^eston

contact, and each contained less than 0;0b Percent tin. Sample 115 was

cut 40 feet north f the south en- ot,-.# $c1 t tin. u n l

Bigteen sa m e verm wp ed for at

than 0, p~, - t Wo 0o

T helfowing .ta~ble ~ ,theanlgi '5b0a1 an :~ 0 o< a. gXib

of Cape iountain saes: .. .

Analysis. Percent

SM-e No _ Qa2 CaC3

27 0.43 0,17

28 .43 .08

30 .53 .63

39 .49 L .05

40 .46 .17

43 .33 L .05

46 ,46 .59

513 1.86 .40

85 .20 10.20

86 .30 .21

89A .30 $.56

89:B 26 .93

90C .20 .13

91A L .05 3.20

91B ,3 3 .05

96 .36 8.72

1253 -15-
R.I. 3978

e~ Ja *~~.Ci;ia M n os-^teof the York 1Reg A~t~hd ioo- Geol.

.; .u.rveY.,- t0 i 4a 604# U r 0 '.:i C; 

_ -Red4vt -eool glirvw iBull*

25R, 195, pp. 2a427- -r'

WX =,WD. Tfii Migih i eo etl'2~ 95 p

*. n PP wj.-- V

HhBRINGT0N,, GSIO3O Lj, :Th Kiniig <in"'Swara. Pehi-isa1al tlas. Geol.

- -Sey~ D;ul. 692, l.l9 pp,.; 3f53. 2 .6.

t=SS, L. The Yo,'rk Tiiinogiob, Alaska.t' eo.L ftr'ioy du1l. 284, 1905,

pp. 145-157.

. AiH. -e ra "Dep sitof ;he t ve, a ,d s iountain

Region, Alaska. Geol. 'Srvey Bull. 3, 1iO8q, pp. -262l. t

0, ,0 W " M *iA1WT L. G g O. ofTo xyOi* 'in Deposi ts,

Alaska. Geol. Survey Bull. 733, 1922, 130 pp.

1253~~~~~~~~~ -16- ij,; 9;0