|
Rosebud Mine Project,
Nevada USA
LOCATION
AND LAND POSITION
Harvest Gold’s Rosebud Gold Mine Project consists of 54
claims (approximately 1,067 acres) centered on and surrounding the former
Rosebud Mine. The property package is in northwest Nevada approximately five
miles to the south of the Hycroft Mine which has produced more than 1,000,000 oz
Au, 2,000,000 oz Ag and has recently resumed production. Rosebud is part of a
large, robust, low-sulfidation hydrothermal system that extends throughout most
of the Kamma Mountains.
PAST
PRODUCTION
Rosebud was mined by a Hecla-Newmont joint venture between 1997 and 2000
producing 396,842 ounces gold (avg. grade 0.4164 oz Au/t) and 2,309,876 ounces
silver (avg. grade 2.42 oz Ag/t) from high grade ores. The mine was one of the
highest-grade modern gold producers in Nevada (grades up to 46.2 oz Au/t).
Northern Nevada 14-16 Ma Low
Sulfidation Epithermal Deposits
RESOURCES
In 1995, prior to the commencement of mining, Hecla calculated a resource of
13,452,000 tons grading 0.066 oz Au/t, 0.797 oz Ag/t for 891,460 oz Au and 10.7
million oz Ag. In late 2000, following closure of the Rosebud Mine, at a time
when gold prices had fallen to US$252/oz Au, Hecla reported an historical
remaining Measured and Indicated Global Resource of 6,816,021 tons grading 0.036
oz Au/t and 0.31 oz Ag/t at a 0.01 oz Au/t cut-off, containing 242,857 gold
ounces and 2,129,750 silver ounces (Hecla Mining Company, 2000). These
historical estimates were made prior to the implementation of NI 43-101, may not
comply with current CIM standards, and are presented for purposes of historical
reference only. The Company is not treating the estimates as a National
Instrument 43-101 defined resource, and the historical estimates should not be
relied upon. In-place, high-grade gold intercepts are present in several areas
peripheral to the mine workings.
REINTERPRETATION, HIGH-GRADE, BULK TONNAGE, DRILL
TARGETS
Harvest has reinterpreted the geology at Rosebud and prioritized 11 high quality
targets on the property. Because of this new understanding of the geology,
particularly the structural controls on mineralization, the Company believes
that there is very good potential to discover additional high grade zones within
and adjacent to the bulk tonnage envelope, and to expand the size of this
envelope.
A NI 43-101 Technical Report was completed in September 2008
(click here to
view). The report’s author recommends an aggressive two-phase drill program to
explore for high-grade zones in the most prospective targets and to expand the
bulk tonnage mineral envelopes.
Rosebud Mine Drill Hole Location Map
Rosebud ore bodies, South,
North, and East (high-grade core mined). Far
East zone is entirely in place.
Numerous in-place high-grade drill intercepts
surround the mined ore zones.
High-grade intercepts are also present to
the north and west. The Chimney
zone accounted for about 40% of the total
mined gold ounces; Approximately
160,000 oz Au mined over a vertical
extent of 220 feet, 120 ft
cross-cut graded 1.3 oz Au/t within the Chimney.
|
|
3D view down plunge of the
Chimney showing newly-interpreted structural control.
Fault planes defined through 3D
modeling of high-grade Au intercepts. New
structural interpretation
defines dilatant zones within left-lateral, northeast strike-slip
fault system controlling
high-grade mineralization in the Chimney. Similar
structurally-controlled
high-grade zones are targeted within the property.
Three-dimensional view looking
North, showing mined zones,
target areas, and drill hole
intercepts.
Rosebud Mine Proposed Drill
Holes and Cross Section Traces
CROSS SECTION THROUGH SOUTHERN FENCE OF 2010 DRILL
HOLES
CROSS SECTION THROUGH HGR-3 AT NORTHERN PART OF THE ROSEBUD
DEPOSIT
HISTORICAL DRILL INTERCEPTS
Many high-grade historical
drill intercepts are present in targets peripheral to the underground mine
workings; selected results are shown below.
Drill holes were completed by
Lac Minerals (RL series) between 1989 and 1992, Hecla (WW-1 and 96-356) in 1994
and 1996, and a Hecla/Newmont joint venture (RS and SLD series) between 1997 and
2000. Diamond drilling core holes are denoted by a “c”; except for WW-1, which
was a water well completed by rotary drilling, all others are reverse
circulation drill holes. True widths of these intercepts are unknown.
Far East Zone Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
RL-217 |
615 |
825 |
210 |
0.101 |
187.5 |
251.5 |
64.0 |
3.46 |
|
incl. |
640 |
650 |
10 |
0.091 |
195.1 |
198.1 |
3.0 |
3.12 |
|
incl. |
655 |
675 |
20 |
0.129 |
199.6 |
205.7 |
6.1 |
4.42 |
|
incl. |
720 |
745 |
25 |
0.447 |
219.5 |
227.1 |
7.6 |
15.33 |
|
incl. |
785 |
810 |
25 |
0.165 |
239.3 |
246.9 |
7.6 |
5.66 |
|
RL-220 |
250 |
275 |
25 |
0.614 |
76.2 |
83.8 |
7.6 |
21.05 |
|
incl. |
255 |
265 |
10 |
1.176 |
77.7 |
80.8 |
3.0 |
40.32 |
|
RL-273 |
95 |
120 |
25 |
0.14 |
29.0 |
36.6 |
7.6 |
4.80 |
|
incl. |
100 |
115 |
15 |
0.224 |
30.5 |
35.1 |
4.6 |
7.68 |
|
RL-273 |
280 |
285 |
5 |
0.375 |
85.3 |
86.9 |
1.5 |
12.86 |
|
RL-273 |
480 |
700 |
220 |
0.097 |
146.3 |
213.4 |
67.1 |
3.33 |
Northwest Corridor Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
96-356 |
1340 |
1390 |
50 |
0.122 |
408.4 |
423.7 |
15.2 |
4.18 |
|
incl. |
1340 |
1350 |
10 |
0.357 |
408.4 |
411.5 |
3.0 |
12.24 |
|
RL-139 |
145 |
160 |
15 |
0.023 |
44.2 |
48.8 |
4.6 |
0.79 |
|
RL-139 |
395 |
405 |
10 |
0.077 |
120.4 |
123.4 |
3.0 |
2.64 |
|
RS-D345-99c |
601.2 |
634 |
32.8 |
0.124 |
183.2 |
193.2 |
10.0 |
4.25 |
|
RS-D345-99c |
665 |
767.5 |
102.5 |
0.148 |
202.7 |
233.9 |
31.2 |
5.07 |
|
RS-D345-99c |
785 |
811 |
26 |
0.257 |
239.3 |
247.2 |
7.9 |
8.81 |
|
RS-D363-99c |
637 |
687 |
50 |
0.054 |
194.2 |
209.4 |
15.2 |
1.85 |
|
RS-D365-99c |
547 |
577 |
30 |
0.077 |
166.7 |
175.9 |
9.1 |
2.64 |
|
incl. |
567 |
573.1 |
6.1 |
0.262 |
172.8 |
174.7 |
1.9 |
8.98 |
|
RS-D366-99c |
557 |
597 |
40 |
0.053 |
169.8 |
182.0 |
12.2 |
1.82 |
|
SLD-394c |
403.2 |
405 |
1.8 |
0.262 |
122.9 |
123.4 |
0.5 |
8.98 |
|
SLD-394c |
422 |
428.7 |
6.7 |
0.279 |
128.6 |
130.7 |
2.0 |
9.57 |
|
SLD-400-00c |
427.5 |
430.8 |
3.3 |
0.177 |
130.3 |
131.3 |
1.0 |
6.07 |
|
SLD-401-00c |
456 |
458 |
2 |
0.142 |
139.0 |
139.6 |
0.6 |
4.87 |
Nym Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
RL-149 |
305 |
345 |
40 |
0.017 |
93.0 |
105.2 |
12.2 |
0.58 |
|
RL-269 |
425 |
465 |
40 |
0.029 |
129.5 |
141.7 |
12.2 |
0.99 |
|
RL-269 |
510 |
525 |
15 |
0.02 |
155.4 |
160.0 |
4.6 |
0.69 |
|
RL-272 |
360 |
395 |
35 |
0.181 |
109.7 |
120.4 |
10.7 |
6.21 |
|
incl. |
360 |
365 |
5 |
0.135 |
109.7 |
111.3 |
1.5 |
4.63 |
|
incl. |
365 |
370 |
5 |
0.268 |
111.3 |
112.8 |
1.5 |
9.19 |
|
incl. |
375 |
380 |
5 |
0.676 |
114.3 |
115.8 |
1.5 |
23.18 |
|
RL-282 |
345 |
355 |
10 |
0.062 |
105.2 |
108.2 |
3.0 |
2.13 |
|
incl. |
345 |
350 |
5 |
0.103 |
105.2 |
106.7 |
1.5 |
3.53 |
|
RS-453Ac |
805.7 |
813.7 |
8 |
0.107 |
245.6 |
248.0 |
2.4 |
3.67 |
|
incl. |
805.7 |
806.3 |
0.6 |
0.542 |
245.6 |
245.8 |
0.2 |
18.58 |
Southern Extension Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
RL-162 |
115 |
125 |
10 |
0.036 |
35.1 |
38.1 |
3.0 |
1.23 |
|
RL-162 |
190 |
200 |
10 |
0.036 |
57.9 |
61.0 |
3.0 |
1.23 |
|
RL-179 |
565 |
600 |
35 |
0.024 |
172.2 |
182.9 |
10.7 |
0.82 |
|
RL-179 |
665 |
975 |
310 |
0.034 |
202.7 |
297.2 |
94.5 |
1.17 |
|
RL-179 |
1005 |
1020 |
15 |
0.044 |
306.3 |
310.9 |
4.6 |
1.51 |
|
RL-257 |
430 |
490 |
60 |
0.069 |
131.1 |
149.4 |
18.3 |
2.37 |
|
incl. |
440 |
450 |
10 |
0.254 |
134.1 |
137.2 |
3.0 |
8.71 |
|
RL-36 |
435 |
465 |
30 |
0.026 |
132.6 |
141.7 |
9.1 |
0.89 |
|
RL-67 |
570 |
595 |
25 |
0.026 |
173.7 |
181.4 |
7.6 |
0.89 |
|
RL-67 |
615 |
645 |
30 |
0.02 |
187.5 |
196.6 |
9.1 |
0.69 |
|
RL-67 |
685 |
690 |
5 |
0.024 |
208.8 |
210.3 |
1.5 |
0.82 |
|
RL-67 |
750 |
760 |
10 |
0.025 |
228.6 |
231.6 |
3.0 |
0.86 |
|
RL-67 |
775 |
790 |
15 |
0.011 |
236.2 |
240.8 |
4.6 |
0.38 |
|
RL-69A |
670 |
680 |
10 |
0.093 |
204.2 |
207.3 |
3.0 |
3.19 |
|
RL-69A |
700 |
715 |
15 |
0.079 |
213.4 |
217.9 |
4.6 |
2.71 |
|
RL-69A |
775 |
885 |
110 |
0.063 |
236.2 |
269.7 |
33.5 |
2.16 |
|
RL-69A |
895 |
910 |
15 |
0.022 |
272.8 |
277.4 |
4.6 |
0.75 |
|
RL-69A |
920 |
960 |
40 |
0.057 |
280.4 |
292.6 |
12.2 |
1.95 |
|
RL-8 |
445 |
510 |
65 |
0.036 |
135.6 |
155.4 |
19.8 |
1.23 |
|
RL-99c |
837 |
852 |
15 |
0.025 |
255.1 |
259.7 |
4.6 |
0.86 |
|
RL-99c |
892 |
947 |
55 |
0.016 |
271.9 |
288.6 |
16.8 |
0.55 |
|
RL-99c |
955.6 |
980 |
24.4 |
0.023 |
291.3 |
298.7 |
7.4 |
0.79 |
Valley Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
RL-56 |
55 |
105 |
50 |
0.014 |
16.8 |
32.0 |
15.2 |
0.48 |
|
RL-56 |
285 |
295 |
10 |
0.046 |
86.9 |
89.9 |
3.0 |
1.58 |
|
WW-1 |
200 |
210 |
10 |
0.122 |
61.0 |
64.0 |
3.0 |
4.18 |
North Zone Feeders Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
RL-106c |
1162 |
1212 |
50 |
0.065 |
354.2 |
369.4 |
15.2 |
2.23 |
|
incl. |
1167 |
1172 |
5 |
0.125 |
355.7 |
357.2 |
1.5 |
4.29 |
|
incl. |
1187 |
1202 |
15 |
0.114 |
361.8 |
366.4 |
4.6 |
3.91 |
Dreamland Target
|
DH ID |
From (ft) |
To (ft) |
intercept (ft) |
Au (oz/T) |
From (m) |
To (m) |
intercept (m) |
Au (g/tonne) |
|
RS-425c |
1655.7 |
1661.5 |
5.8 |
0.824 |
504.7 |
506.4 |
1.8 |
28.25 |
|
incl. |
1658.6 |
1661.5 |
2.9 |
1.4 |
505.5 |
506.4 |
0.9 |
48.00 |
DISCOVERY POTENTIAL
Harvest believes the property
has potential to host several million ounces of gold. Our goal is to add
significantly to the known resources by expanding high-grade zones and
discovering new ones, thereby increasing the grade and tonnage of the deposit.
The Company is focused on developing an open pit minable resource.
|
