ram fetrolkuks limited chapman i.akk p5;opkuty

42Ee3swee39 a.7^2 ROPE LAKE

REPOTTf OXAU INDUCED FOLAPa'ZATXOM SURVEY

ONRAM FETROLKUKS LIMITED

CHAPMAN I.AKK P5;OPKUTY

010

:ECEIVED

EC 7t971PROJECTS SF.CTION

Ram Petroleums Limited holds a group of claims in the Schreiber

area of northwestern Ontario. During the period December r 1970 throu&h

March, 1971^ an induced polarization curvey x;as carried out over eelcctcd

the claim group, .by Projex Limited. Notes on the theory end

raethod of survey arc appended. The following is o resume of observations.

Tnc property consists of J4 contiguous unpatcnted cloitna, encom-

pasaing approximately 1,360 acres, and numbered:

j.;; 2^40 to 57 incluoive

Ttt 2Vo003 to DC inclusive

TD 2SGG32 to 41 inclusive.

The clair.rj cover a noi.'thwocterly-elori?,r.tec strip of ground between

CnnpriTiU and Flicker lakes, sorae 20 airrailes north of . :-^ TOV.T? of Schreiber -

and about 100 tiilea east of Thunder Bey.

Acccr.fi ic by float- or s'.ci-cquipped aircraft.

The area is one predominantly underlain by granitic gneisses and

mif,iriatitcc, vith nutiorous inclusions of altered volcanic and sedimentary

rocks, Ko geological tiaps are yet available.

The claim group covers a very pronounced northvect-treucling

linear depression that quite apparently represents a regional fault zone.

- 2 -

At Intervale along this depression thero ero exposures of

sheared and shattered gneisses, cencnted by qunrts veinlcts and carrying

quite significant quantities of chalcopyrite, and lesser pyrite. Rock

outcrops arc limited In the valley, but there are several showings of

similar r-sincralizntion over a two nilo length on and between Chapnan

end Flicker lakes. Tho overall impression ie one of widespread shattering

end brecciation along e major fault, accompanied by copper mineralisation.

'jfhic survey was undertaken in an attempt to establish whether copper

concentrations night exist in commercial quantities.

ITfVT'T' VsrWf .V. UAU L/v/Mi: i

A northvoet-trundittg base line was cut and chained up tha centre

of the valley for a length of 15,000 feet. At 300 foot intervals picket

lines were turned off normal to the base line, cut, and chained for 1,000

feet to the uortlic&st and nouthwest.

Qu every second line, i. o. o.t 600 foot Intervale, an induced

polarization curvey uas carried out over the 2,000 foot length of picket

line. Tiie survey var; of the frequency domain type, dipole-dipole technique,

cprcad iiiterval of iOOfcot, aud four aoparatioao tteacured.

used vac a McPhor P660 unit.

Kccsuromcnte were taken at 475 station jLwith cJKht r.iccsurcnontB

at cost otationo for a total of 13* 300 t^ *l''*"***'""'*""**M"ll""*iiWI-l'"l**"-**-l"^^^^^" ' "~ ~

DISCUSSION, OP ..SURVEY RESULTS.:

The attached composite plan gives an overall picture of results

obtained. Details ero shown on the data atrips for each 1s ...;; surveyed.

3

Kowhero aro there strong anomalous features. The composite

chowa all, even very client, I. P. effects), with the weaker features

plotted primarily for geological information. Overall results suggest

tha type of rcaponee that uii^ht be caused by two or several branching

r.hearu with gancr.-illy snail quantities of metallic nineralization

throughout.

There ere two crcas of relatively otronger response; anomaly

A is on lines 12 and 18 E, at 500 and 400 S respectively; anomaly B

is in and north of the email 1-kc on iir.as 6 E, O, 6 au d 12 W, at 100

to 300 15.

Copper ndrieralization io Unovm to exist in the vicinity o f each

of these enoxnlicc, being exposed on the trail between Chapu.cai and Flicker

lakes south of the baee line, sad on the shore of the tutall lake juat north

01 tha base line. Hov?evcr, einco the Una fjrid wfla cut aud the ourvoy

done in winter in heavy snov;, those chowings v?ore completely buried and

their exact location \*ith respect to the line grid io unknown. The precise

locations are critical in assessing results of the survey.

Since resulto fall in the "crey area" - r:ov;here stron; , but in two

locations having sufficient intensity to warrant closer investigation - it

is recoiuu:onded that sorao further surface prospecting, tvcnching aud saapling

bc dono before deciding whether drilling io warranted.

It is recommended initially that the various known showings bo

relocated with respect to the lino grid, end that they bc coraplctcly opened

up snd sampled, end results compered with I. P. response. Anomaly A can

probably be well exposed by trenching. Anomaly B probably cannot be

trenched cince It lies within end just off the end of o lake. However,

the tv,'o ^.norualies are of sinilar intensity, though B is irorc extencive,

nad cii v,Ii^; one will wake it possible to arrive ct a reasonable evaluation

of the other. At this point a decision e..u bc uadc ao to whether drilling

ii. warranted.

Kecpectful3y fcuhsii

I,. C. rhclr.n, M.A,Se. Cor. r.u 11J n g G c- o lo f i r. t.

rorito, Ovitario.

I-i:y, 1971.

ON THE THEORY OF INDUCED POLARIZATION

AND THE METHOD OF FIELD OPERATION

The following is in large part taken from the manuals of McPhar Geophysics

Limited, originators of the technique, and manufacturers of the equipment.

C

O

THEORY;

Induced Polarization as a geophysical measurement refers

to the blocking action or polarization of metallic or electronic conductors

in a medium of ionic solution conduction.

This electro-chemical phenomenon occurs wherever electrical

current is passed through an area which contains metallic t.inerals such

as base metal sulphides. Normally, when current is passed through the

ground, as in resistivity measurements, all of the conduction cakes place

through ions present in the water content of the rock, or soil, i.e. by

ionic conduction. This is because almost all minerals have a c.uch higher

specific resistivity than ground water. The group of minerals commonly

described as "metallic", however, have specific resistivities much lower

than ground waters. The induced polarization effect takes place at those

interfaces where the mode of conduction changes from ionic in the solutions

filling the interstices of the rock to electronic in the metallic minerals

present in the rock.

The blocking action or induced polarization mentioned above,

which depends upon the chemical energies necessary to allow the ions to

give up or receive electrons from the metallic surface, increases with the

time that a d.c, current is allowed to flow through the rock,.i.e. as

ions pile up against the metallic interface the resistance to current

O

ci

o

- 2 -

flow increases. Eventually, there is enough polarization in the form of

excess ions at the interfaces to effectively stop all current flow through

the metallic particle. This polarization takes place at each of the infinite

number of solution-metal interfaces in the mineralized rock.

When the d.c. voltage used to create this d.c. current flow is

cut off, the Coulomb forces between the charged ions forming the polarization

cause them to return to their normal position. This movement of charge creates

a small current flow which can be measured on the surface of the ground as a

decaying potential difference. This is the principle on which are based "Time

Domain" I.P. Surveys.

From an alternate viewpoint it can be seen that if the direction

of the current through the system is reversed repeatedly before the

polarization occurs, the effective resistivity of the system as a whole

will change as the frequency of the switching is changed. This is a con

sequence of the fact that the amount of current flowing through each

metallic interface depends upon the length of time that current has been

passing through it in one direction. This phenomenon is the basis for

"Frequency Domain" I.P. Surveys and the Kc?har system.

Since the I.P. effect is caused by electronic, i.e. metallic,

conductivity only, induced polarization measurements are an indication of

the total amount of metallic constituents in the rock. Thus all of the

metallic minerals in the rock, such as pyrite, as well as the ore minerals

chalcopyrite, chalcocite, galena, etc. are responsible for the induced

polarization effect. Some oxides such as magnetite, pyrolusite, chromite,

and some forms of hematite also conduct by electrons and are metallic.

All of the metallic minerals in the rock will contribute to the induced

polarization effect measured on the surface.

- 3 -

O

FIELD PROCEDURE;

Current is applied to the ground at two points a distance

(X) apart. The potentials are measured at two other points (X) feet

apart, in line with the current electrodes. The distance between the

nearest current and potential electrodes is an integer number (N) times

the basic distance (X).

The measurements are made along a surveyed line, with a

constant distance (NX) between the nearest/ current and potential

electrodes. In most surveys, several traverses are made with various

values of (N): i.e. (N) - l, 2, 3, 4, etc. The kind of survey required

decides the number of values of (N) used.

Three sets of data are recorded. The Apparent Resistivity

(P^/zTr") is, as the name implies, a measurement of the resistivity of

the rock,' and normally taken at a frequency of 5 c,p.s. The Frequency

Effect (F.E.) is a measurement, expressed as a percentage, of the change

in resistivity with frequency change, usually to 0.3 c-;p.s. The thirdj

Apparent Metal Factor (M.F.) is a calculated figure - Resistivity Frequency Effect x 1000

which by experience has been found best to combine the two measurements

and to illustrate the induced polarization effect.

The metal factor increases much more rapidly with metal content

of the rock than either frequency effect increases or resistivity decreases.

PLOTTING PROCEDURE;

In plotting the results, the three sets of values measured for

each set of electrode positions are plotted at the intersection of grid lines,

one from the center point of the current electrodes and the other from the

center point of the potential electrodes. The lateral displacement of a

given value is determined by the location along the survey line of the

- 4 -

O center point between the current and potential electrodes. The distance

of the value from the line is determined by the distance (NX) between the

current and potential electrodes when the measurement was made.

It should be emphasized that the resulting plot is merely a

convenient method of presentation of results and not a vertical section

along the survey line. The following sketches illustrates a typical

electrode configuration and plotting procedure.

-nx

-T^

S.otion, on line

n-l

7 . 8

x - E lectrode eprcocJ n: E lectrode seporofiorr

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TYPICAL

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1,2-5,7 2,3-7,6 3.4-C.9

PLOTTING

PROCEDURE

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ASSESSMENT W(2.7*2 ROPE LAKE 900

l. Type of Survey Induced Polarisation'••••••••••••••••••••••••.••••••.••.•••••.••.•.••AMWI.BMMIVMMWWMBMWWMMaiM**

2. Township or Area ............"W.^J^.tJ*?^

3. Numbers of Mining Claims Traversed.by Survey

...................Ta.2WQw*Jk,;:^/-i fa. y*, 7-?, ^ - i ^J -r- s

TB 286640, 41, 4jL 43, 44, 45, 46, 47. 4 49 *^\ c ctKut( l- J- 3 ........................^..t.-.l.^.^!..^^.!.^'...^........-....................TB 266650, 51, 52, 53, 54, 55, 56, 4

288038 4 39 o H c o o' ' ^ f \ ^ KJ o C Kf -d

4. Number of Miles of Line Cut __...

*5. Number of Stations Established -..

*6. Make and type of Instrument Used .

*7. Scale Constant or Sensitivity .................

*8. Frequency Used and Power Output ...?*?.f.?.?P*.

Flown

9. Summary of Assessment Credits (details on reverse side)

Total 8 hour Technical Days (Include Consultants, Draughting etc.)

Total 8 hour Line-Cutting Days ...................

Calculation

304 x 7 - 2128 . 2128Technical Line-cutting

allowable

Number of claims

Assessment credits per claim

The dates listed on this form represent working time spent entirely within the limits of the above listed claims ll Check If otherwise, please

Dated : . . . . . ̂ 2,. .1971. Signed:

Note: (A) * Complete only if applicable.(B) Complete list of names, addresses and dates on reverse side(C) Submit separate breakdown for each type of survey.(D) Submit in duplicate.

ASSESSMENT WORK BREAKDOWN

1. FIELD WORK

Type of Work Name 6c Address Dates Worked6 - 10 Dec.70

Number of 8 hour days

" M.Dignam "

Helper W.. Cumerf qrjd

" G.Mlnthom"* r G'eraid" ComeViT " Dan Coneau

PDMOIIT TAMTc vaorgB uapar

M M IIn H H n ,, ,, ,,

18 Feb. - 4 Mar., " " " " 18 MAT* -.7 AP1.7J-...

H II M II II

.....52....

.....12....

Tarrace Bay* Ont. 6 Jan^4 Mar .4 18 Mar. -7 Api. 71H II H tl tt II II II II II II 1

ir 1r ir 18 Mar. - 7 Apl.71 M " " 18 Feb. - 4 Mar. 71

49 4?20 14

Name 6c Address Dates Worked (specify in field or office)Number of 6 hour days

3. DRAUGHTSMAN, TYPING, OTHERS (specify)

Name 6t Address Type of Work Dates WorkedNumber of 8 hour days

...K^-.^

4. LINE-CUTTING

Name Address

TOTAL 8 HOUR TECHNICAL DAYS

Dates WorkedNumber of 8 hour days

TOTAL 8 HOUR LINE-CUTTING DAYS

- -f

s

490 07'30'

\-

87 0 I5'

490OO —

42E03SWC039 2 .702 ROPE LAKE 200

AREA OF

ROPE LAKEDISTRICT OF

THUNDER BAY

THUNDER BAY MINING DIVISION

SCALE: 1-INCH-40 C HAINS

LEGEND

PATENTED LANDCROWN LAND SALELEASESLOCATED LANDLICENSE OF OCCUPATIONMINING RIGHTS ONLYSURFACE RIGHTS ONLYROADSIMPROVED ROADSKING'S HIGHWAYSRAILWAYSPOWER LINESMARSH OR MUSKEGMINESCANCELLED

C.&

Loc LO.

M R O.S HO

NOTES400 Surface Rights Reservation around ati lakes and rivers.

DATE OF is SUE

OHT. DEPT. OF MJNES

NATIONAL TOPOGRAPHIC SERIES 42 E 3

PLAN NO. MONTARIO

DEPARTMENT OF MINES AND NORTHERN AFFAIRS

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