41N81SE0020 DAVIEAUX35 DAVIEAUX010
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MASTER RESOURCES 6. DEVELOPMENTS LTD.
REPORT
on
GEOPHYSICAL SURVEYS
DFJOUR EXTENSION PROPERTY
Davieaux Twp. - Ontario
ALGOMA CENTRAL
RECEIVED
JAN is 198B
LANDS Sv FORESTS DIVISION
Toronto, Ontario
October 16, 1987
R. H. HENNING, P. Eng.
M1NEX EXPLORATION SERVICES
41N01SE0020 OAVIEAUX35 DAVIEAUX 010C
CONTENTS
Page
INTRODUCTION .............. ............................... l
LOCATION AND ACCESS OF SURVEY AREA ..................... .. l
CLAIMS SURVEYED ........................................,. l
TOPOGRAPHY ........... .......................... ... ..... .. l
GENERAL GEOLOGY ...........,............... ........... .... 2
LINE CUTTING ..... .... ............................ ... ... .. 2
GEOPHYSICAL SURVEYS ...................................... 3
DATA PRESENTATION ..................................... ... 3
RESULTS AND INTERPRETATION ............................... 4
CONCLUSIONS .............................................. 6
RECOMMENDATIONS ..................................... ..... 7
MAPS
GENERAL LOCATION MAP ... (following "CONTENTS")
GRID LOCATION MAP ... (following above map)
CLAIM PLAN SHOWING EXTENT OF GEOPHYSICAL SURVEYS ...(following above map)
MAGNETIC SURVEY (in pocket, back of report)
VLF-ELECTROMAGNETIC SURVEY (in pocket, back of report)
MASTER RESOURCES 6 DEVELOPMENTS LTD.
GENERAL LOCATION MAP
DEJQUR EXTENSION PROPERTY
Davieaux Township Ontario
80 tllomhm
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MASTER RESOURCES 6 DEVELOPMENTS LTD.
GRID LOCATION MAP
DEJOUR E X l'ENS l ON PROPERTY
Davieaux Township - Ontario
Scale: l :50000 N.T.S. M N/l
MASTER RESOURCES 6 DEVELOPMENTS LTD.
CLAIM PLAN SHOWING EXTENT OF GEOPHYSICAL SURVEYS
DEJOUR EXTENSION PROPERTY
Davieaux Township - Ontario
Scale: l" * h M ile (l :31680)
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INTRODUCTION
This report presents and describes the results of geophysical surveys carried out in 1987 for MASTER RESOURCES 6. DEVELOPMENTS LTD. on that company's Dejour Extension property, located in Davieaux Township, Batchewana area, Ontario. In it, the writer also draws certain conclusions and makes recommendations to follow up on this work.
LOCATION AND ACCESS OF SURVEY AREA
The survey area is located in the west-central part of Davieaux Township on claims held by MASTER RESOURCES 6. DEVELOPMENTS LTD., approximately 65 air-kilometers north of Sault Ste. Marie, Ontario, between N. Lat. 47O05' - 47006' and W. Long. 84011139" - 84O13'30".
The property may be reached via an all-weather gravel road (known as "Mile 38 Road") which branches to the northeast from Hwy. 17 approximately 48 kilometers north of Sault Ste. Marie, near Chlppewa River Falls. About 29 kilometers from Hwy. 17 on this road, a gravelled bush road branches to the east for 0.5 kilometers, ending at the Junction of Quintet Creek and Chlppewa River. Upon crossing Chlppewa River, a rough trail, suitable for walking only, follows the south side of the river to the survey area (see "Grid Location Map"). The distance along this trail from Chlppewa River crossing to Base Line SON is approximately 5 kilometers.
CLAIMS SURVEYED
The geophysical surveys covered the following mining claims, completely or in part, held by MASTER RESOURCES 6 DEVELOPMENTS LTD. in Davieaux Township, Sault Ste. Marie Mining Division, Ontario:
AC - 9326, 9327, 9328, 9329, 9330, 9331;AC - 11135, 11136, 11137, 11138, 11139, 11140, 11141, 11167,
11168, 11169, 11170, 11171, 11179, 11180, 11181, 11182, 11183, 11184, 11185, 11186, 11187, 11188, 11189 and 11190.
TOPOGRAPHY
The survey area is characterized by rugged topography. The main feature is the valley of the Chippewa River which trends north- northeast to east-southeast through the area. Steep-sided hills rise
- 2 -
up to n vertlcol distance of ISO mctcre frotn the volley floor. Subsidiary valleys have caused pronounced variations In topography* Steep rock scarps end cliffs are common along the valleys and higher elevations. The northwestern and southeastern portions generally exhibit fairly level or moderately rolling ground, with local cedar, alder and grass swamps.
All of the area is heavily forested, mainly with maple. Abundant cedar, spruce, poplar and birch are also found in places along with some large pines.
Overburden cover in the area is generally thin and is confined mainly to valleys and swampy areas. Bedrock exposures are found throughout the area, mainly on the sides and tops of hills and rises.
Chippewa River flows westerly to southwesterly through the survey area. A number of small creeks, largely intermittent, drain from hilly terrain into the river. A few small lakes and ponds occur along the southeastern periphery of the survey area.
GENERAL GEOLOGY
The survey area occurs within the southern portion of an approxi mately west-southwest-trending belt of Archean meta-volcanics and meta-sediments near its southern contact with Archean felsic in trusive and metamorphic rocks. Diabase dykes of Proterozoic age, trending generally northwesterly, hpve intruded the older rocks. Southeast to northeast-trending faulting is the main structural feature.
Gold mineralization is known to occur in the vicinity of the property. During the course of the geophysical survey work, abun dant quartz veining was noted in places in rock exposures along the survey lines.
LINE CUTTING
A grid of base and picket lines was established on the property by Minex Exploration Services of Toronto, Ontario between June 28 and July 31, 1987. Lines were spaced 100 meters apart with pickets at 25-meter Intervals. The picket lines were established from a base line as shown on the accompanying "Grid Location Map". A total of 42.4 line-kilometers were cut and chained, including the base line.
- 3 -
GEOPHYSICAL SURVEYS
Magnetic and VLF-Electromagnetic surveys were performed over the grid of picket lines described above between August 12 and 27, 1987 by Minex Exploration Services of Toronto, Ontario. The main objective of the surveys was to detect anomalies which may provide targets for gold exploration.
The MAGNETIC survey was carried out using an Exploranium Geometrics G-826 Proton magnetometer measuring the total intensity of the magnetic field on a digital read-out display, with a sensitivity of j* l gamma. Base stations were established at sites shown on the survey map, and all field readings were corrected for diurnal vari ations of the magnetic field. Readings were recorded at 25-meter intervals along picket lines with the magnetometer sensor pointing toward true north. A total of 40.0 line-kilometers were su'rveyed between August 12 and 26, 1987 by V. Radovanovic, operator.
The VLF-ELECTROMAGNETIC survey was performed employing a Geonics EM-16 instrument measuring the in-phase and quadrature-phase (om- ponents of the vertical magnetic field as a percentage of the hori zontal primary field, with a resolution of ^ 171 on the in-phase and quadrature-phase scales. Transmitting station employed was Cutler, Maine (NAA - 24.0 kHz). Readings were recorded at 25-meter inter vals with the operator always facing in a northerly direction along the picket lines, perpendicular to the direction of the transmitting station. A total of 40.0 line-kilometers were surveyed between August 12 and 27, 1987 by R. H. Henning, operator.
DATA PRESENTATION
The geophysical data for the survey area is presented on 2 maps on a scale of 1:2500 (or l cm ^ 25 meters), as follows:
MAGNETIC SURVEY - l map showing corrected readings minus 58000 gammas and magnetic contours. Contour interval is 100 gammas below 1000 gammas, and 500 or 1000 gammas above 1000 gammas.
VLF-ELECTROMAGNETIC SURVEY - l map showing readings, in-phase and quadrature-phase profiles and interpreted conductor trends.
- 4 -
RESULTS AND INTERPRETATION
MAGNETICS
The magnetics indicate, in general, east-west trends. On the southwestern part of the survey area, southeasterly-trending magnetic features are apparent. Background in the area ranges from approximately 58600 gammas (600 gammas on map) at the southern extremity to about 58750 gammas (750 gammas on map) on the northern portion.
The northern part of the survey area, approximately north of Chippewa River, shows higher magnetics than the rest of the area. There, the most significant magnetic anomalies ore typically narrow and linear, ranging up to 500 meters in length. However, most of these anomalies do not extend for more than 200 meters along strike. They exhibit relief of up to 3000 gammas above background.
The southv. ^stern portion of the survey area Is characterized by easterly to southeasterly-trending magnetic features, comprising anomalies ranging up to about 1250 gammas above background, and some pronounced "lows".
The remaining area, east and south of Chippewa River, displays largely background magnetics with a few more or less isolated anomalies with relief ranging up to 4200 gammas.
The strongest anomalies were located at 37E, 43+OON (4805 gammas), at 41E, 57+50N (3785 gammas), at 40E, 58+75N (3608 gammas), at 50E, 49+75N (3460 gammas) and at 50E, 56+50N (3272 gammas). Several pronounced magnetic "lows" occur, in general, immediately adjacent to magnetic "highs", forming magnetic "dipoles".
The stronger and fairly continuous magnetic anomalies on the northern portion of the survey area probably reflect narrow, disjoined bands of magnetite-bearing Iron Formation associated with meta- volcanic-sedimentary rocks. Areas of magnetic "lows" nnd background values with scattered, less significant anomalies may indicate that these are underlain by meta-sedimentary and/or felsic to mafic intrusive rocks. The low background magnetics on the extreme southern part of the area appear to be caused by a bedrock terrain of felsic intrusive/metarnorphic rocks.
Local folding is suggested in several places by the trend of the magnetics. A possible southeasterly-trending fault is indicated by a string of "lows" extending from 29E, 47+50N to 36E, 42+50N and the distortion of magnetics in this area. Easterly to east-south easterly faulting is interpreted to occur in the area bounded approxi mately by 29E to 50E, 51+50 to 53+OON.
- 5 -
ELECTROMAGNETICS
The VLF-Electromagnetic survey detected a number of generally easterly to southeasterly-trending conductor zones. The strongest and most significant anomalies were located
1. Between 30E and 53E, 51+25 to 53+OON, essentially easterly- trending, except between 49E and 52E where a southeasterly trend is indicated. These anomalies are largely unrelated to topographic features and are believed to reflect bedrock conductors, possibly consisting of sulfldes and/or graphite. The anomalies appear to have been disrupted and displaced at two localities by southeasterly- trending faulting. They coincide, in general, with weak to back ground magnetics except at 43E, 52+10N, where correlation with a 141l-gamma magnetic anomaly is shown;
2. Between 29E and 36E, 47+75 to 42+25N, mainly southeasterly- trending. The most prominent conductor there coincides with pro nounced magnetic "lows" and probably reflects a southeasterly- trending conductive fault zone. Other conductors in this area also suggest similar fault zones;
3. At 47E, 46+05N. This conductor is coincident with a 1158-gamma isolated magnetic anomaly and could reflect sulfidea associated with magnetite;
tt. At A7E, 56+55N. The conductor correlates with background mag netics and appears to be part of a southeasterly-trending fault zone;
5. Between 33E end 34E, 57+87.5 to 58+12.5N. This anomoly, port of a longer zone extending from 29E to 34E, suggests an east-northeast- trending conductive fault. It flanks moderately strong magnetics-in places.
Other, weak to possible anomalies located elsewhere do not appear to indicate bedrock conductors, and are interpreted to be largely due to surficial conductivity related to topographic features such as ewr.mps and small creeks (due to "edge" effects). However, it is possible the*: some of these anomalies may reflect fault zones, formational contacts and perhaps, disseminated sulfide mineralization.
. 6 -
CONCLUSIONS
The magnetic survey Indicated a number of generally easterly- trending anomalies ("highs"). The majority of these are located on the northern portion of the survey area where they form narrow mag netic bodies up to 500 meters long. The remainder of the area Is characterized by largely background magnetics containing Isolated "highs". The southwestern part displays some southeasterly-trending magnetic features, Including pronounced "lows". Individual anomalies range up to 4200 gammas above background. However, most exhibit relief of from 500 to 1500 gammas. Steep gradients are typical. Some magnetic "dlpoles" occur, characterized by pronounced "lows" adjacent to "highs". The anomalies arc caused either by local con centrations of magnetite (largely disseminated) and/or magnetic eulfides (pyrrhotite) within volcanic-sedimentary or mafic to ultra mafic intrusive rocks. The stronger, linear and more extensive anomalies may indicate the presence of Iron formation. Magnetic "lows" probably reflect mete-sediments, felsic meta-volcanics and/or felsic intrusive rocks. The magnetics, as well as the electromag netics, suggest southeasterly to easterly-trending faulting and local folding in the survey area. A strong southeasterly-trending fault zone was indicated on the southwestern portion of the grid.
The VLF-Electromagnetic survey detected a number of weak to strong conductors. Most of these are interpreted to be caused by surficial conductivity associated with swamps, swampy depressions or small creeks between outcrop areas (due to "edge" effects). However, the survey also revealed the existence of several signi ficant anomalies largely unrelated to topographic features. The strongest and most extensive of these trend easterly across the north-central part of the grid and may reflect possible sulfide- bearing zones within meta-volcanic-sedimentary rocks. A conspicuous bedrock-related anomaly on the southwestern portion of the survey area appears to indicate a southeasterly-trending conductive fault zone possibly containing sulfide mineralization. Other significant anomalies may reflect i^lMdes and/or graphite and fault zones.
I" summary, the geophysical surveys have detected a number of significant anomalies, some of which may be caused by sulfides and possibly, associated gold mineralization.
- 7 -
RECOMMENDATIONS
It IB recommended that the area covered by the geophysical surveys be geologically mapped and prospected In order to explain, If possible, the most significant magnetic and electromagnetic anomalies discussed above. A soil-geochemical survey may also prove to be useful. Trenching and/or drill-testing would be contingent on the results of this work.
m.-Wvl
Toronto, Ontario
October 16, 1987
R. H. HENNING, P. Eng.
Geophysicist
M1NEX EXPLORATION SERVICES
OR. ADDITIONAL
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59
i 1
GAM
MA
49
+ O
ON
SU
RV
EY
B
Y:
MIN
EX
E
XP
LO
RA
TIO
N
SE
RV
ICE
S T
OR
ON
TO
AU
GU
ST
1
2 -
26
, 1
98
7
48+00 N
47+00 N
46 + 00
N
45 + 00 N
44+00 N
43 + 00 N
42 + 00
N
J41+00 N
41N01SE8020 DAVIEAUX35 DAVIEAUX
210
MA
STE
R
RES
OU
RC
ES S
* DE
VE
LOP
ME
NTS
LT
D
DE
JO
UR
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EN
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TY
Da
vie
au
x
To
wnship
On
tar
i o
MA
GN
ET
IC
SU
RV
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SCAL
E:
1:2s
oo
DRAW
N BY
: R.
H.H.
, V.V
.R.
DAT
E:
SEPT
EMBE
R, 1
98?
MA
P
No
DAVI
EAUX
-D
AV
IEA
UX
- 0
03
5*2
.,
