Geophysical Self Potential Report on: The Hilda #3 Mineral Claim and, Hilda Fr. (Part of the Hilda Group) Texada Island British Columbia Nanaimo Mining District Latitude 49 47’ 26” north Longitude 124 36’ 35”West NTS : 92FA5E
The Hilda #3 Mineral Claim and, Hilda Fr. Texada Island ...
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Geophysical Self Potential Report on:
The Hilda #3 Mineral Claim and, Hilda Fr. (Part of the Hilda
Texada Island British Columbia Nanaimo Mining District
Latitude 49 47’ 26” north Longitude 124 36’ 35”West
NTS : 92FA5E
Introduction Location and access History Property Description
Regional Geology Property Geology Previous Work Mineralization Work
done Geophysical Work Discussion of results Blubber Bay Quarry
Environmental concerns Conclusions Proposals for further work
Statement of Costs Certi6cate Bibliography
S.P. Dam Notes Echo Bay Mines diamond drilling summary
Location Map Claim Map 1:50,000 Plan of old underground workings
Self-Potential Survey Map 1: 1,320
1 1 1 2 2 3 3 3 4 4 5 5 6 6 6 7 8 9
(Appendix “A”) (Appendix “B”)
Fig #l Fig #2 Fig #3 (in po&-et) Fig #4 (ii pocket)
A work program was carried out under my direction during May and
June 1998 on the Hilda Group of mineral claims on Texada Island
B.C.. The program consisted of a Self-Potential geophysical survey
and was undertaken between May 6’, and June 12”, 1998. The work
follows a recommendation of A.B.L. Whittles, Ph.D. in his 1975
geophysical report on the property. It was felt that a closely
spaced S.P. survey might be effective in locating small lenses of
massive sulphide mineralization that previous wider spaced surveys
may have not detected. The S.P. program was successml in locating
detected several such targets. The survey went well and no unusual
problems were encountered.
Diamond drilling by Echo Bay Mines in 1989 confirmed the existence
of high-grade minemlizaton at various depths down to 350 meters.
Knowing that, it was hoped that some of those intersected mineral
shoots might outcrop on the surface under a cover of overburden,
and be detectable with S.P.. A summary of the favourable drill
intersections of the “Echo Bay Program” has been included for the
benefit of the reader as Appendex B.
No mapping record appears to have existed for the underground
workings on the claim group, so one day was spent doing that with
belt chain & compass.
Location and Access
The Hilda Group is located at latitude 49’ 47’ 26” north and
longitude 124’ 36’ 35” west in the Nanaimo Mining District of
British Columbia. The property is located on Texada Island, some
one hundred kilometers northwest of the City of Vancouver, in the
Strait of Georgia. Access to the Island is by regularly scheduled
air service from Vancouver to Gillies Bay, or by car ferry via B.C.
Ferries from the town of Powell River. There is road access to the
property from the village of Blubber Bay via 0.5 kilometers of
paved road (B.C. Cement road). Hotel accommodations are available
in Vananda and Gillies Bay.
Mining activity on Texada Island dates back to the turn of the
century when several small mines were in operation in and around
the town of Vananda near the north end of the Island. From these
old producers, approximately 75,000 ounces of gold, 500,000 Ounces
of silver and 19,000,OOO pounds of copper were recovered. The
larger of these mines being The Marble Bay Mine, The Little Billie
Mine, The Cornell Mine and The Copper Queen Mine. Several
kilometers to the south, near the town of Gillies Bay, Texada Mines
Ltd. operated a large underground and open pit mine at Welcome Bay
between 1952 and 1976. Over 20 million tons of ore was mined
yielding iron and copper concentrates and approximately 25,000
ounces of gold. At present there are three open pit limestone
quarries in operation at the north end of the Island. Metals
Research Corporation of America has a 100 ton per day gravity mill
on It’s nearby Bolivar gold property on
Crescent Bay Road. The mill is not presently operational but I
understand that with a limited amount of work it could be.
The Hilda Group consists of two 2 post mineral claims and one
Fractional mineral claim. They are located at the head of Blubber
Bay and extend from tidewater to an elevation of 100 meters. The
surface tenure is held by Western Forest Products, however, the
basemetals & industrial minerals are held by Ash Grove Cement
West Inc. and Tilbury Cement. The precious metals are held by
myself under the Mineral Tenure Act.
As the Ash Grove’s “Blubber Bay Quarry expands eastward, the Hilda
Fraction is destined to become part of that quarry within the next
ten years. In fact, at the time of this report, Ash Grove has
commenced a diamond drilling program to prove up limestone reserves
on the Hilda Group.
Also located on the Hilda Fraction are the workings of the old
“Paris Mine”. These workings include four shallow shafts and one
adit which provides access to a limited amount of drifting. The
adit is assessable and does not pose any obvious hazards.
Logging has taken place on the property intermittently over the
past century. At present there is very little marketable timber on
the property due to recent selective and clear-cut logging
programs. A network of old logging “skid-roads” allows for easy
access to most parts of the claim group.
Ash Grove Cement utilizes the area for cat&rent of surface
water for use in their mill and townsite.
Texada Island hosts the same geological units as central Vancouver
Island. Karmutsen volcanics, consisting of flows of porphyrytic to
amygdaloidal basalt and andesite, and Quatsino limestone, all of
Triassic Age, underlay most of the Island. Highly altered andesite,
tuff, limestone and pyroclastics of the Sicker Croup outcrop at the
southern end of the Island. These rocks, of Permian Age, are the
oldest on the Island. The volcanic and sedimentary units at the
north end of the Island have been intruded by a number of diorite
and quartz diorite stocks and dykes. it is in the area of these
intrusions that economical mineral deposits have been located and
mined in the past.
Regional faulting is strongly developed on the island.
Northwesterly trending faults dominate the structural setting.
These large faults (some being traced for 10 to 15 kilometers)
parallel the island’s axis, Malaspina Strait, and Georgia Strait.
Lesser east- west trending faults cross-cut the predominate
northwesterly faults in all regions of the Island.
The Claim Group is underlain almost exclusively by Upper Triassic
Quatsino limestone of the Vancouver group. Inevitably, at some
depth there will exist a basaltic or plutonic floor to the
limestone, as is the case elsewhere on Texada Island. Intrusive
activity is evident in the form of two diorite stocks and a well
developed system of north-south diorite dykes. A predominate
feature appears to be a solitary east-west trending quartz porphory
dyke which cross-cuts the island from shore to shore. Bedding
planes are evident on the eastern portion of the Hilda Fraction.
Written reports from previous operators indicate that the property
may have been host to a large geo-synclonic event. Recrystalization
of the limestone and the limited extent of bedding planes exposure
make confirmation of this difficult.
Underground exploration work is believed to have commenced around
1901. The property hosts four shallow shafts and one adit. The adit
and subsequent drifting totals approximately 80 meters of
tunneling. The underground workings accessible from the adit are on
one level only and do not connect to the shafts above! No raises,
winzes or stopes
are present underground. A very limited amount of drifting is
present at the bottom of the “main shaft” ( less than 10 meters ).
The southernmost shaft has a small stockpile of high- grade copper
ore ( 100 tons? ) piled up nearby. In addition to the shafts there
are several surface pits and trenches, all appearing to have been
excavated about the same time as the shafts. There is no record of
any commercial production. Recent exploration programs are listed
1970 Bellex Mines Ltd. 1973 Longbar Minerals 1976 Aquarius
Resources Ltd. 1981 Aquarius Resources Ltd. 1985 Rbyolite Resources
Inc. 1989 Echo Bay Mines Ltd.
E.M. survey Ground magnetometer and VLF-EM surveys Diamond Drilling
( no report available ) 1.P & Magnetometer surveys and Soil
geochem. Magnetometer survey and Soil geochem. Airborne &
Ground magnetometer surveys Rock & Soil geochem; I.P. Survey;
Diamond drilling Geological mapping
Chalcopyrite, pyrrhotite, pyrite, sphalerite, magnatite, and native
gold occur as massive sulfides in a metasomatic skam deposit at the
contact of Quatsino limestone and two diorite stocks.
Mineralization occurs in a gangue of garnet, epidote, pyroxene,
actinolite, amphibole and wooiastinite. Some, but not all, of the
north-south trending diorite dykes contain pyrite, pyrrhotite and
minor chalcopyrite as fractire fillings and dissiminations.
The 1989 grid of Echo Bay Mines was remarked with fresh flagging,
in the areas of the Hilda Fraction and the Hilda #3 mineral claim.
Additional lines were flagged at 25 meter intervals. In total, 12.8
line/Km were flagged. A Self-Potential survey was undertaken on the
Hilda Fraction and the Hida #3 mineral claim. One day was spent
mapping and sampling the underground workings of the “Paris Mine” (
fig. 3, in pocket ).
-. Geophysical Work
For many years naturally occurring negative electrical ground
potentials have been known to exist above some sulfide ore
deposits. Several theories as to why this phenomenon occurs have
been proposed. The most widely accepted theory seems to be that of
Sato and Mooney 1960. They theorised that two electrochemical
reactions take place within the ore body: one which is cathodic,
above the water table, and one that is anodic, below the water
table. The difference in oxidation potential between the two
reactions determines the overall magnitude of this Self Potential
(SP) effect. Anomolies greater than 200 millivolts (mv) are
generally considered good anomolies. Chalcopyrite, pyrite, galena,
pyrrhotite, sphalerite, and graphite are all known to produce SP
anomolies. Other factors not related to mineralization, but known
to sometimes cause an SP effect are bioelectrical activity in
plants, water movement in the soil, and contamination of
The survey objectives were to expand the area of known
mineralization into nearby areas where bedrock had been obscured by
overburden and to perhaps iden@ new areas where massive sulphide
mineralization might be exposed on surface.
The SP survey was carried out during a period of warm spring
weather. Several conditions had to be met to ensure that the
results would be meaningtul and the margin of error kept to a
minimum. Continuous wsrm weather ensured continuity in climatic
conditions and reduced the chance of body voltages from the
operator being transferred to the instrument. Equipment was checked
every morning to ensure trouble free operation, check readings were
taken of several of the previous day’s readings to ensure
continuity At every station three readings were taken within a 1
meter circle and averaged out to give a final reading. Tbis helped
to reduce possible error caused by biological sources, Differences
in these readings varied from 0 - 18 mv per station (usually <8
mv). A base electrode station was set up at 35+65N, lo+12 E on the
Hilda Fraction. All readings were taken, relative to that
A Micronta brand multimeter (model 22-185A) was used. This is a
digital meter with a 10 mega-ohm input impedance, This was
sufficiently high enough that an external compensating device to
balance off variations in natural ground resistance was not
necessary. Ground resistance throughout the survey varied from
5,000 ohms to 25,000 ohms. Nonpolarizing CuSO4 electrodes were
The data presented in this report reflects the voltage values as 15
m&volts higher than actually recorded in the field. It was
felt, based on the levels of background readings , that the base
station was probably located in a spot 15 mv higher than reasonable
background. The anomalous results have been plotted on Fig #4 (in
pocket) and all of the data is listed at the end of this report.
The survey went well and no unusual problems were
Discussion of results:
Field readings ranged Tom +169mv to -213mv. Readings in excess of
-50 millivolts were deemed to be anomalous. The margin of error is
estimated to be +/- 5mv. Values were contoured by hand at 25 mv.
increments starting at -25 mv. A positive anomaly is contoured at
the north end of the grid. The “0” contour and those above 1OOMv
have purposefully omited. The survey was successful in locating
several significant anomalies within the work area:
Paris Mine anomaly: This anomaly measures 200meters long and 40
meters wide. It covers the main showings of the Paris Mine. The
anomaly is bisected by the solitary east west trending quartz
porphoty dyke mentioned earlier in this report. The anomaly narrows
slightly at that point and that is expected, as the dyke is
Cluster anomaly: This is a series of 5 small anomolies all
“clustered” around the base line between Line 33+25N and Line
35+50N. Each averaging in size, about fifty meters across. However,
the fact that they are so coincidentally close to one another and
that they average about IOOmv, is significant.
Other anomalies: A small but significant anomaly was found centered
on Line 37+75N at 12+75E and a very unusual high-positive anomaly
was located on Line 39+5ON at 9+85E.
Several other small and isolated anomalies were found during the
survey but they are either too small in size, or too low in SP
expression to be of concern at this time. A couple of small
anomalies are possibly off of the claim group.
No S.P. effect was found to exist in the vicinity of the north
shaft at 37+25N, 10+75E and that is puzzling. Massive chalcopyrite
is exposed as a $11 in the wall of the shaft. This is
just the type of mineralization where one would expect to get very
high S.P. results.
The Blubber Bav Ouarrv:
On May lo*, 1998 I met with Mr. Ted Thompson, manager of the
Blubber Bay Quarry, at the Quarry office. Mr. Thompson indicated to
me that as early as five years from now, the expanding limestone
quarry could begin consuming the “Paris Mine” portion of the Hilda
Fraction. It is very possible that selective removal of ore from
the Hilda Fraction could take place in a very cost effective way,
as part of the quarrying process, with a sharing of the profits
between the mineral title holders. With the Blubber Bay Quarry
holding the limestone and base metal rights under “freehold”, and
the Hilda Fraction
holding precious metal rights under the Mineral Tenure Act, an
ideal situation may exist to mine ore. Mr. Thompson indicated that
his company would be willing to participate in such a venture, and
that is very encouraging.
There does not appear to be any significant environmental concern
regarding the development of this property. It is destined to
become a part of the existing limestone quarry, as the quarry
expands anyway. There is no old growth forest on the property and
there appears to be no cultural or aboriginal historical
The survey was successful in outlining the main Paris Mine
showings, and also in locating several other anomalies favorable
1. The Cluster anomaly remains the most encouraging area of the
survey mainly due to the large number of S.P. highs in such a
2. It is not clear why the area of the Paris north shaft did not
produce a predicted SP effect. from the sulfide source known to
3. The strong positive anomaly on Line 39+5ON, 9+85E is also
puzzling. It occurrs near an area once used as a townsite for
quarry workers and their families so it is possible that it may be
the result of buried domestic debris.
4. Commercial production of ore from the old “Paris Mine” site may
eventually be possible by open pit means, as the Blubber Bay Quarry
expands to overtake it in five to ten years.
Proposals for further work:
1. It is recommended that trenching be undertaken in the following
Line 39+5ONat 9+85E Line 37+75N at 12+75E Line 35+25N at 11+50E
Line 34+5ON at 10+88E Line 34+25N at 11+38E Line 33+75N at 10+38E
Line 33+5ON at 11+50E
STATEMENT OF COSTS
Field Crew : Robert Perry ( Project Manager ) Lisa Hull (Laborer)
4116 Marine Ave. General Delivery Powell River, BC., VSA 2J3
Vananda, BC VON 3K0 Salary:. $207 I day Wages $100 /day.
Robert Miner (laborer) Edwin Jobanson (Loborer) General Delivery
P.O. Box 4 Gillies Bay, BC., VON Vananda, BC, VON 3K0. Wages $100
/day Wages $100 /day
Field work: Mav6, 1998 to June 12, 1998
Mav 6 to Mav23: Establishing control grid.
Mav 27: Mapping and sampling “Paris Mine”
Mav 29 to June 12 S.P. Field Program
June 22 to June 24 Report Preparation:
Lisa Hull ( 4 days in the field )
Robert Miner ( 4 days in the field )
Edwin Johanson (1 day in the field
Robert Perry ( 14 days in the field )
Robert Perry ( 3 days preparing report )
Feny tolls.. _. _. _. _.
Field supplies.. _. _. _.
I Robert A Perry do certify that:
1. I have been actively prospecting for mineral ores in the
Province of British Columbia since 1975.
2. 1 am experienced in the theory and fieldwork of the Self
Potential Geophysical Survey and the interpretation of it’s data as
a tool for prospecting.
3. All of the work included in this report was done by me, or under
4. 1 have a 50% interest in this property.
5. 1 assume full responsibility for the quality of all fieldwork
done, and the accuracy of this report and the data contained in
1916 AnnualReport page K357
1968 Geological Survey of Canada, Paper 68-50
1970 Report on the Loyal and Paris Claims, Asses. Report
1970 EM survey, Loyal and Paris Claims, Asses. Report #2919
1975 Geophysical Report, Cortez Group, Asses. Report #5763
1981 Geological, Geochemical & Geophysical Report on the Texada
Property, Asses. Report #9419
1986 1981 Geological, Geochemical & Geophysical Report on the
Bolivar-Cortez Group, Pat Group, Maude Adams & Texada Crown
Grants, Asses. Report #14827
1989 Diamond drilling, Geological, Geochemical & Geophysical
Report on the Cortez Group, Texada Island, Asses. Report