Foresthill Exploration and Mining Corporation
CANYON CLAIMS: 480 ACRES: 577,980 OUNCES
is a fully permitted mining operation.
All environmental reviews have been completed and approvals
have been granted. All
Federal, State and County permits are issued allowing mining to
to the mining operation, which should begin this spring-summer, some
housekeeping will need to be accomplished. A
fall has occurred in the South Tunnel which will require about a one
week cleanup. The
settling ponds also will need to be cleaned out.
The tunnel floor is very rough and needs to be surfaced to
facilitate better rubber tired haulage.
The North Tunnel needs to be shored and timbered to
facilitate its use in the mining operation and as a secondary route
to the mine.
We cannot determine the reserves with a high degree of accuracy until additional seismic and core drilling are completed, this will allow us to accurately determine the meanderings of this channel and the thickness of the gravel deposits. Although this is a placer gold operation, two geologic reports on this property suggest a drilling operation as there is good evidence of lode gold deposits as well as another channel. It is also difficult to determine if there are tributaries of any length along the channel. We can, however, reach a conservative estimate by taking the shortest line between two known mining points of the channel we are now prepared to mine (a route we know the stream did not take). These two points are the Macedon Tunnel Mine and the East Black Canyon Mine, a distance of nearly 4,700 feet from the East Black Canyon Mine portal to the east boundary of the claims. We then subtract the 600 feet which has been partially mined and arrive at 4,100 feet of channel remaining. Some of the side tunnels have determined the width of the channel to be approximately 150 feet. We know the thickness is at least 40 feet as some of the rooms in the old workings are that high.
production from the 600 feet of this channel mined at the
neighboring Green Mine reported 1.50 ounces per linear foot, which
would calculate out to about 1.69
per cubic yard. It is
estimated that approximately 1.00 ounce of gold per cubic yard of
gravel has been recovered from the Black Canyon Mine to date.
If we average breasting out 150 feet and average a depth of
30 feet of gravel, we should have 700,000 cubic yards of gravel to
process. We are using a conservative number of 577,980 ounces of gold. These
figures do not take into consideration additional gravels which may be mined from tributaries or the
extension of the channel to the west or lode deposits.
of the East Black Canyon claims are covered by a mixture of volcanic
and sedimentary rocks. These
rocks have been identified as rhyolitic and dacitic lapilli tuff
white, gray and pink in color, dark-gray to greenish-gray olivine
hypersthene basalt flows, breccia and welded tuff, gray andesitic
tuff breccia and lahar deposits.
Below the rhyolitic tuff sequence are quartz rich gravel
deposits and locally you can find volcanic gravel lenses between
rhyolitic and andesitic volcanic sequences.
These rocks lie unconformably on the auriferous tertiary
gravels of Eocene Age and the later intervolcanic channels.
On the western side of the claims is a wedge of metamorphic rock which roughly follows the path of Black Canyon. This rock enters the west line of the claims about 1000 feet north of the southwest corner of the claims and extends up to the East Black Canyon Mine. These rocks are identified as the Shoo Fly Formation of Silurian Age. The upper portion of the Shoo Fly could be as young as late Devonian. It is the basal unit of a complexly folded, eastward facing metamorphic sequence which becomes progressively younger to the east. These rocks have been described as interbedded metamorphosed graywacke, quartz-granule conglomerate, quartzose sandstone, greenish-gray to white ribbon chert, gray to black slate and scattered lenses of gray to white limestone and buff-weathering dolostone.
The late intervolcanic channels, such as we find here at East Black Canyon, probably were above the early covering of andesite which covered the early tertiary channels. These buried channels are not unlike our present high mountain streams. They formed steep narrow channels with waterfalls, followed by sections of flatbed suitable for the accumulation of gold rich gravels. The bedrock of these channels is slate and quartz-bearing schist. The intervolcanic channel being mined on the East Black Canyon claims has been reported to run from the Macedon Tunnel Mine westerly through the East Black Canyon Mine.
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Foresthill Exploration and Mining Corporation