Title: Location and Accessibility
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5Location and Accessibility
- Property is located on the southern flank of the
Copper Mountains in the Humboldt National Forest. - The mining claims are located in sections 13, 14,
23 and 24 Township 44 North, range 57 East, Mt.
Diablo base and Meridian. - The property may be reached by traveling north
from Elko, Nevada on state highway 51/225 for a
distance of 55 miles, then northeasterly on a
gravel Road 27 miles to Charleston.
6Physiographic Features
- Mining property is located in the transition area
between the Great Basin Province and the Columbia
Plateau Province. - The Jarbidge wilderness area lies to the
northeast about 5 miles and Copper Mountain is
about 4 miles to the north of the property. - Topography in the claimed area is gentle to
moderate, elevations range from 6400 feet to 7300
feet.
7Climate and Vegetation
- The climate of the area is typical to the climate
of the northern Great Basin Province. - Winters are severe and summers are mild to hot.
- The average annual precipitation over the area
varies from eight to 15 inches. - The natural vegetation in this area is sagebrush.
A good variety of perennial grasses and browse
cover most of the property. - Some woodland cover of aspen and willow are found
along the streams and drainage ways that
intersect the hillsides.
8History of the Mardis/Charleston Mining District
- The first mineral deposits found in the district
were placers, located chiefly on the west side of
76 Creek about 4 miles above Charleston. - Placer deposits are located in Pennsylvania
Gulch, Union Gulch, Dry Ravine, and Badger Creek.
9History of the Mining District (cont.)
- There have been several lode deposits mined in
the district. - The Graham Mine is about 4 miles north of
Charleston. According to Schrader (1923) the
mine contains 1600 feet of underground workings.
The tunnel drift, 900 feet long, is on a vein
which in 1914 was said to have contained an 18
inch ore shoot of 16 per ton ore.
10History of the Mining District (cont.)
- The Prunty Mine is about one third of a mile
above the Graham mine. - It has been worked intermittently since 1905. The
ore was treated in a hydraulic five stamp mill.
The metals produced were silver, gold, copper and
antimony.
11History of the Mining District (cont.)
- The Black Warrior Mine is about one half mile
north of the Prunty Mine at the head of a
drainage from the west emptying into 76 Creek. - The mine is developed on a gossan formed along a
contact between limestones, shales and
granodiroite intrusives. Ores from the mine were
reportedly processed in a small cyanidation mill.
12Geology
- The property is underlain by three types of
rock. - Oldest are the shales and limestones of Paleozoic
age which have been metamorphosed into low-grade
slates, hornfels and marbles respectively. - Next oldest are the granodioritic intrusives.
- Youngest are the rhyolites which lie in fault
contact with the intrusive and metamorphic units.
13Geology (cont.)
- Sedimentary units seen on the property are
referred to as shales and limestones instead of
their actual metamorphic counterparts. - Shales and limestones are correlative to the
Devonian and Pennsylvanian Pilot shale and
Johanna limestone. - The Johanna limestone is the host rock in the
Black Warrior Mine.
14Geology (cont.)
- Igneous rocks. The granodiorite plug is the
oldest igneous unit on the property and is
probably Jurassic in age. - Volcanic rocks on the property are all of the
Jarbidge rhyolite formation. - Geologic Map, next slide
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19Structural Geology
- The structures seen on the property appear to be
expressions of two major structural trends in
this part of Nevada. - Both trends are believed to be Precambrian or
lowest Paleozoic origin. - The first and oldest set is the N 10 E to N 35 E
set of faults and shears expressed locally in the
structurally controlled drainages from 76 Creek
to Copper Creek. - Most of the northeast trending drainages, faults
and shears are sympathetic to the major
structures in Copper Creek and 76 Creek.
20Exploration Activities
- Twelve exploratory holes were drilled on the
property for a total of 3400 linear feet. - Assay reports show that 7 of the 12 drill holes
had anomalous gold values and 4 of the holes
(drill holes 1, 2, 10 and 11) intersected
mineable grade material. - Drill hole 1, at a depth of 129 to 130 feet,
intersected ore assaying .038 ounces of gold per
ton. The same hole, at a depth of 240 to 251
feet, intersected ore assaying .015 ounces of
gold per ton.
21Exploration Activities (cont.)
- Drill hole 2 from 15 to 40 feet in depth
intersected gold ore averaging .063 oz gold per
ton. This hole at a depth of 160 to 165 feet
intersected ore assaying .486 ounces gold per
ton and at a depth of 165 to 170 feet intersected
ore assaying .019 ounces gold per ton. - Drill hole 10 from 95 to 100 feet in depth
intersected ore assaying .058 ounces gold per ton
and from 115 feet to 120 feet in depth
intersected ore assaying .061 ounces gold per ton.
22Exploration Activities (cont.)
- Drill hole 11 intersected gold ore from 0 to 5
feet assaying .840 ounces gold per ton and from 5
to 15 feet intersected gold ore assaying an
average of .054 ounces gold per ton. - Drill hole 11 from 95 to 140 feet in depth
intersected gold ore averaging .031 ounces of
gold per ton. Ninety five (95) feet was the
beginning of a sulfide zone. The drill rig could
not penetrate deeper than 140 feet because of
excess water and heavy sulfides. This zone of
sulfide mineralization is obviously the top of a
gold copper skarn or the top of a copper porphyry
deposit. Copper values in the zone from 115 feet
to 140 feet in depth averaged .13.
23Exploration Activities (cont.)
- Exploratory excavations were made by dozer
equipment. Results of laboratory tests on
samples taken from these excavations are shown in
the following slide (table 1). - Locations of the excavations are shown on a
topographic map following table 1.
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26DRILL HOLE LOCATIONS
- DRILL HOLE LOCATIONS SHOWN ON THE FOLLOWING
TOPOGRAPHIC MAP
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28Geochemical Sampling
- Sample RP 2113, .018 oz per ton gold.
- Sample DM 16, .065 oz. per ton gold.
- Sample RP 2081, .083 oz. per ton gold.
- Sample RP 2072, .029 oz. per ton gold.
- Sample RP 2089, .013 oz. per ton gold.
- Sample RP 2092, .046 oz. per ton gold.
- Geochemical sampling of soils and rock chips were
conducted on the property. Anomalous gold values
were discovered in at least six samples. - See Following Slide for Geochemical Value Map
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30Assay Companies Performing Chemical Analysis for
this Project
- Rocky Mountain Geochemical Corp.
- Salt Lake City, Utah.
- Analytical Services
- Elko, Nevada
- Monitor Geochemical Laboratory
- Elko, Nevada
- The Assay Lab,
- West Jordan, Utah
31Additional Exploratory Activities Needed to
Outline Reserves
- It appears the northwest trending shear zones
intersect a structure following Union Gulch in
the vicinity of drill holes 1, 2, and 10.
Additional drill holes up Union Gulch may reveal
more mineable material. - More exploratory drill holes should be drilled in
the vicinity of the Prunty and Slattery mines. - Drill holes where anomalous geochemical values
were encountered will also be desirable.
32The Case for a Gold Copper Skarn at the Black
Warrior Mine
- There is a good argument drill hole 11
encountered a gold copper skarn at about 95 feet
in depth. The gold values in the sulfide zone
which average about .031 ounces gold per ton meet
the criteria of at least 1 g au per ton (Theodore
et al, 1991). - This value is probably low, because native gold
associated with quartz particles probably could
not be brought to the surface because of the high
volume of water encountered and the drilling
method used.
33Case for Gold Copper Skarn (cont.)
- Copper values in the sulfide zone average .13
at the Black Warrior Mine. The ratio of cu/au is
1179. This ratio would be substantially
different if native gold had been brought to the
surface during drilling. Apparently, the gold
values encountered involved small gold particles
attached to the sulfides which were probably less
than 40 microns in size.
34Case for Gold Copper Skarn (cont.)
- Host rock at the Black Warrior Mine is the calcic
Johanna limestone of Pennsylvanian age. - Granodiorite intrusive is probably of Jurassic
age. - Geochemical signature, gold, copper, and arsenic
are abundant.
35Exploration Activities to Delineate Extension of
Skarn
- Airborne mapping method similar to that used at
Yerington, Nevada to map the skarn - Magnetic and gravity surveys
- Directional drilling
- Extensive geologic mapping on the ground
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38Roberts Mountain Thrust System
- Thrust System is on our claims. Paleozoic
sequence fits thrust pattern. - Guilmette formation and overlying pilot shale on
the property typify formations associated with
the thrust system. - Thrust system presents possible exploratory
drilling targets in the upper or lower plates of
the thrust.
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41PROBABLE GOLD RESERVES
- Conservative reserves 50,000 ounces
- Based on drill hole analysis and geology
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- Realistic reserves 2,000,000 ounces Based
on historic evidence of producing mines in the
area, drill hole analysis and high values of
arsenic (realgar and arsenopyrite) and antimony
(stibnite) in vein systems, and free milling gold
values. -
42NEXT STEPS
- Priorities
- Develop Skarn Deposit
- Additional Exploratory Drilling
- Detailed Geologic Mapping
- Questions/Discussion