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Report on the Geochemical Survey of

Mineral Claims Hob0 172-1 75, Becord #

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List of Diagrams -

1 ) Soil samples Histogram of Cu values, Hobo 172-175, Ruby-Cracker

Creeks. 7 \ .

2) .Soil samples Histogram of Pb values, Hobo 172-1 75, Ruby -Cracker

Creeks.

3 ) Soil s~mples Histogram of Zn values , Hobo 172-175, Ruby-Cracker Creeks,

4) Soil samples Eistogram:: of Mo values, Hobo 172-175, Ruby-Cracker -

Creeks.

5) Soil samples Histogram:: of Ni vlaues, nobo 172-175, Ruby-Cracker

Creeks.

0 List of Maps

Z) Geochemical soil sample ~u(ppm) Hobo 172-175, ~tlin 14.D. , B.C.

2) Geochemical soil sample ~b(ppm) Bobo 172-175, Atlin M.D., B.C. * * ' 3 ) Geochemical soil sample Zn (ppm) Hobo 172-175, ~tlin, M.D. B.C.

4) Geochemical soil sample Mo (ppm) Hobo 172-1 75, btlin, M.D., l3.C

1 5) Geochemical soil sample Ni (ppm) Bobo 172-1 75, Atlin M.D., B.C.

0 L,

. .

T h e Hobo 172-175 claims ar$ f r e e of snow from JUG t o -

'I-

September. Snow f a l l i s approximately 1-3 f e e t and winter

temperatures range from +loOl? t o - 6 0 ° ~ . Strong winds duringF t h e

f a l l and sp r ing months a r e not uncommon. Summer temperatures

average 40'- 50' P and r a i n showers a r e frequent i n Ju ly and

August. - , *

The Hobo 172-175 claim group is located e n t i r e l y above

t r e e l i n e . Alpine g rass , genera l ly q u i t e short and sparse i n

p laces , as well as buckbrush and occass ional small willow grow

wi th in t h e claim group.

History_

During 1967 and 1968 a l a r g e block of claims were s taked *

i n t h e Ruby Creek a r e a by Canadian Johns-Manville Co. Ltdy and

Adanac Mining and Exploration Ltd. The c l a i m were s taked t o

cover and p ro tec t severa lmolybdeni te showings on t h a t creek and

surrounding mountains. he Hobo 172-1 75 mineral claims were

s taked as poss ib le unmineralized ground t h a t would support a

mine t a i l i n g s dump should t h e a r e a ever be developed. The

Geochemical Survey covered by - t h i s r e p o r t is p a r t of a program

t o check t h e uhderlying bedrock f o r poss ib le minera l iza t ion .

Previous t o 1967 t h e Ruby Creek molybdenite showings had

been repeatedly staked by ind iv idua l prospectors and allowed t o

l apse .

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Other activity in the Ruby Creek valley was in 1950-52

when Transcontinental Resources Ltd. partial^ developed a " .

Wolframite vein between Boulder and Ruby Creeks. The Ruby

Creek valley has also been of interest to placer miners as- ,

auriferous gravels occur in the creek up to 2 miles north of

Surprise Lake. The search for placer gold has. also been carried

out on Cracker Creek.

Geology

Geological information on the area is based largely on 1 Aitkens (1959) report "Atlin Map Area, British Columbia,

Geological Survey of Canada, Ediemoir 307". De-tailed geological

studies within the Ruby Creek vallpy have alsa been made by the

writer as well as geologists employed by Adamac Hining and

Exploration Ltd.

?he Hobo 172-175 claim group for the nost part is under-

lain by glacial gravels and felsenmeer areas composed mostly of

ultramafic rocks. As the mountains imediat~Ly to the North

and South are composed of Permianperidotitesand dwlites associated

with Cache Creek meta-sediments, it is reasorable to assume that

bedrock belbw the glacial till is also composed of these rocks.

To the South, the ultramafic rocks are actually a roof pendant

overlying Cretaceous-Tertiary Alaskites of the Surprise Lake

batholith.

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GEOCHEMISTRY ' .

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Geochemical Environment

The geoch6mical envirbnrnent of the Hobo 172-175 claims .

involve several factors which will be briefly discussed below.

1) As the whole area is cove..*ed by snow up to 9 months

of the yeear,'physical erosion rather than chernical erosion is

considered to be the most important type of weathering.

Physical erosion here would involve freeze-thaw action, frost

heaving, nivation and debris and snow slides. -

2) As bedrock below the glacial till is assumed to be

dunite and peridotite,and as the adjacent mowltains consist of

8 these rocks, elements such as nickel would be expected to be

concentrated in the soils hers as opposed to rnolybdenite.

3) As all the soils collected consisted of glacial till

anomalous samples could have been transported from elsewhere.

Procedure followed in collecting Geochem samples

A 2600' baseline was initially surveyed in using a 200'

chain and Brunton compass, The baseline was laid out along the

Hobo 172-175 claim location line, bearing 4' West of North.

Seven offset lines at right angles to the baseline were surveyed

in by the same method. These offset lines extend 1000' on each

side of the baseline, Footage markers weye placed every two

hundred feet on the baseline and the offset lines, From June 21

to June 23, 1971 two summer students employed by Canadian Johns-

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(% . +

Manville Co. Ltd. co l lec ted 83 s o i l samples along t h i s g r i d

system at 200' i n t e r v a l s . J

A l l samples were co l l ec ted i n wet s t r eng th paper envelopes

and a i r d r i ed b,efore shipnent t o t h e Vancouver 1aborator. ies of

Bondar-Ciegg & Co. Ltd. -.

0 as t h e over a l l values are t oo low as compared t o previous surveys

i n t h e Ruby Creek area. Holybdenite su r face showings probably

do not l i e wi th in t h i s l o c a l drainage &ittern, but '=this e l e m k t <

st i l l may be loca ted- a t depth.

Pollow 'up geochem sampling should be continued for Cu;

Pb, Zn f u r t h e r t o t h e south and south e a s t of t h e present sampled

a r e a , as these elements a r e concentrated i n the southern por*ion

of t h i s survey. The Copper could be loca l ized wi th in the u l t r a -

2) I am a graduate of McGill University, Montreal, P.Q.

B.Sc. 1964. s

3 ) I have attended Memorial University of Newfoundland for one '

year to study Geology, 1970-71 . 4) 1 have practised in the geological profession for seven years.

5) This report is based on study of published geological naps

and field information gathered by Canadim Johns-Manville

Co. Ltd. employees, by the writer and on analytical information

from the Vancouver laboratory of Bondar-a-egg and Company Ltd.

November 13, 1971

Atlin, B.C.

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0 Statement of Qualifications

I, Herbert Keith Conn, of the.town of &best&, do hereby

declare that:

1 ) I am a Mining Geological Engineer employed as Sxploration

Xanager for Canadian Johns-14anville Co, Ltd., Box 1500, Asbestos,

I?. &*

2 ) 1 have practised in the geological profes~ion for 23 years and

specialized in economic geology and exploration proce!idures for the

past 22 years,

3 ) I am a graduate of the University of Toronto, Ontaria with a'

degree of BA.SC (Mining ~eology) 1948.

4) Z am a member of the following professional associations: U:

a) Corporation of Engineers of Quebec.

b) Mon-resident member of the Association of Professional

Engineers of the Province of British Colmbia.

c) Fellow of the Geological Association of Canada,

d ) Pellow of the Society of Economic Geologists.

e) Member of the Canadian Institute of Eining a d Hetallurgy.

f) Nember of the American Institute of l4hing 3hgineers.

5) This report is based on published and unpublished information.

Xovember, 1971

try Date; Jan, 28, 197%

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Department of

Mines and Petroleum Resources

ASSESSfd\EidT REPORT

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Department of

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H I S T O G R A M O F

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R U A Y - C R A C K E R I ASSESSiir-IEiY.4 REPORT

D;r~ebr*fmhant -of

& ~ d &eta$a/eum Resources

&$$@S$M%ldT REPORT

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HlSTOC7 RAM OF

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Mines and Petroleum Resources

ASSESSI'AEL4T REPORT

VALUES I HOBO

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APP~EJUIX TV

Geochemical Pie ld Data