Gold / Dolly Varden
Geological Reports
On
Dolly Varden Claims
Nevada Copper-Gold Project
Northing 4465000 m
Easting 718000 m
NAD 27 ZONE 11T
Longitude 114° 27’ W Latitude 40º 18’ N
East Dolly Varden District
Elko County, Nevada
U.S.A.
Map Sheet: Sharp Peak 7 ½ Quadrangle
Report Prepared By Laurence Stephenson PEng
Nov 2005
For
Consolidated Gold Win Ventures Inc.
1016 – 470 Granville Street
Vancouver, British Columbia
V6C 1V5
Kokanee Placer Ltd. focussed on the Dolly Varden
Area, Elko County, Nevada, 50 miles north of Ely, Nevada, which
was one of the most productive copper gold mining areas of Nevada.
The claims were prospected, sampled and staked for Kokanee Placer
Ltd. and Consolidated Goldwin Ventures Ltd has acquired a 50%
interest in them.
The Property is located east of Highway 93 Alternate
and northwest of the town of Lages in eastern Nevada and is readily
accessible for prospecting and mineral exploration. The entire
Property consists of 16 unpatented mineral contiguous claims staked
and recorded with the Bureau of Land Management, Nevada U.S.A.
Access to the Property is from well-maintained ranch
roads on the south sides of the Property, from the town of Lages,
Nevada. Topography is typical Nevada foothills of the ranges rising
from the Dolly Varden spring at under 200 feet to the top of at
over 800 feet. The washes and drainages are moderate mountain
foothills type with typical desert vegetation of the interior
ranges of Nevada. The region is mainly open range cattle and well
connected by highways to centres with plenty of heavy equipment
and mining experienced operators available for hire (Pictures
Overview, Trench DV Spr and Trench 4 show the relief, desert vegetation,
local water sources and range roads).
Silver lead ores were first discovered in the area
in 1869 but nothing happened until the Dolly Varden copper mine
was discovered and opened in 1872. This 10 year mining and smelting
operation was followed by little exploration until the early 20th
century discovery of gold in the area, rekindled the copper and
silver lead exploration resulting in intermittent production from
the region until the late 1940’s and from 1975 until the
early 1980’s. The Dolly Varden mine developed into one of
the richest copper mines in southern Elko County. Another mine,
the Victoria, was the top producer in 1908 and 1909. The mines
closed again one by one in 1911 and 1912 due to another drop in
copper prices, reopened in the 1920s but by 1927 the district
had been abandoned. In 1941, prompted by World War II, the Victoria
operated until 1947.
During the 1970s and 1980s activity resumed at the
Victoria mine as Anaconda developed the 3.5 million tons of greater
than 2% copper and then Day Mines operated in the 1980’s
shipping concentrate to the Kennecott Mineral Smelter at McGill,
Nevada. The mine was shut down in 1981 in conjunction with falling
copper prices. Although additional ore was intersected to the
east of the main mine area (the Dolly skarn copper area) no further
production was recorded.
The region is in the eastern part of the Great Basin
and Range district of the southwest US that centered on Nevada
but extends into neighbouring states, stretching from California's
Sierra Nevada Range on the west to the Rockies of Utah on the
east. The region is one of broad basins hung between craggy ranges.
Three types of ore have been mined in the Dolly
Varden District: copper ores in skarn; lead silver replacement
and fissure deposits in limestone; and goldbeating quartz veins
in quartz monzonite. The skarn type of deposit has been the most
productive to date. Another type of deposit suggested related
to the copper skarns is a gold copper porphyry system associated
with latite (felsic dykes) and quartz-wollastonite-talc alteration
(on the subject claims).
Copper Skarn
The copper deposits on the west side of the Dolly
Varden Range, adjacent to the Melrose quartz monzonite stock generally
occur as irregular pods replacing limestone or as tabular bodies
along the north trending fissures. The mineralogy is straightforward
with copper minerals (chrysocolla, malachite, minor chalcite,
and residual chalcopyrite and bornite) in a gangue of typical
skarn mineralization (jasperoid, garnet, biotite, tremolite, actinolite,
abundant limonite and minor pyrite) with quartz and calcite. The
copper deposit at the Victoria Mine was described as a breccia
pipe emplaced during the intrusion into the Permian limestones
and calcareous sandstones that produced the zoned skarn associated
with the deposit.
The main copper mineralization (chalcopyrite) occurs
along the western edge of the pipe (late stage collapse feature?)
with a breccia matrix of garnet, calcite, quartz, pyrite and bismuthite.
On the South Dolly claims the copper skarn mineralization
associated with latite (felsic dykes) and quartz-wollastonite-talc
alteration (Pictures O/C Gossan Trench DV Spr and Trench Gossan).
It has been suggested that with the gold presence more noticeable
at this location, a gold copper porphyry system could be associated
with this mineralization similar to the Fortitude Au Skarn deposit
of the Battle Mountain area (Picture Trench 3).
Lead Silver Fissures
This deposit type occurs on the southeast side of
the Dolly Varden Range (the area of the South Dolly Claims), along
north striking fractures in the limestone and as irregular replacements
along bedding adjacent to these fractures. The veins or fissures
of quartz, barite and calcite, often associated with tabular bodies
of jasperoid or altered rhyolite porphyry dikes, contain the silver
lead minerals (argentiferrous cerussite, anglesite, occasional
wulfenite and residual galena) with limonite and residual pyrite.
Breccia material in these veins suggests that the mineralization
emplacement was coincidental with the structural preparation of
the ground (Picture Trench 2).
Quartz Veins in Monzonite
The gold related deposits are located mainly in
the northwest part of the Dolly Varden District in quartz veins
along steep north to northwest trending fractures in the quartz
monzonite (Picture CuAu look at next trench, and Geo look at rock).
Associated with copper (chalcopyrite, pyrite, bornite and bismuthinite;
Picture CuAu Mineral), the auriferous veins are found in alteration
10 to 30 foot envelopes grading from argillic (near vein) to propyllitic
(distal to vein).
The similar mineralogy to the Victoria Mine suggests
an affinity to the same mineralising event.
South Dolly Varden Property Geological Setting
Most of the claims are underlain by limestone, which
are generally flat lying to gently dipping (25° to 35°)
to the east. Several north-northwest trending felsic dykes are
present with associated jasperoid bodies and beds – some
thinly bedded abutting them or nearby. Several of these jasperoid
zones have been traced for over 1200 feet (Picture Trench 500S).
The South Dolly Claims provide a very attractive
exploration prospect for copper gold mineralization associated
with known mineralising porphyry intrusives. Preliminary exploration
and research has identified the high potential of this geology
in association with intrusives and skarn that have been correlated
with some of Nevada’s best known copper gold districts (Battle
Mountain) and has not been subjected to extensive exploration
and drilling.
It is concluded that detailed exploration as recommended
could locate further mineralized zones to evaluate the known zones
in light of the potential of A) skarn mineralization; B) distal
Au Ag mineralization; and C) porphyry Cu Au. This exploration
will ascertain the various rock units and with detailed rock and
soil geochemistry surveying, will help evaluate the potential
of the property and delineate drill target. It is apparent that
this area represents a unique situation: with an existing mine
model, superb road access and a good geological terrane. Further
work is warranted.
The exploration program is proposed as follows:
| Phase |
ITEM |
$US |
| 1. |
Geological Mapping, Geochemical Surveying, sampling |
$ 25,000 |
| 1a. |
Assaying, Permit preparations and filing fees |
$ 25,000 |
| 2. |
Permit Completion Drilling 5000 feet at $30 / foot |
$150,000 |
| 3. |
Permitting and further definition drilling and bulk sample
testing |
$275,000 |
| 3a. |
Contingency, reports, supervision travel |
$ 25,000 |
| |
|
|
| Total |
|
$500,000 |
