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Silverstone
Completes Definition Drilling on the Animas -Refugio Vein, Copala Project, Sinaloa State, Mexico
December 13, 2007
Vancouver, B.C. - Silverstone Resources Corp. ("Silverstone")
is pleased to report results from 44 additional drill holes (6,288m HQ core
drilling) from the company's Phase IIA drilling on the Copala silver-gold
project. Copala is located 60km ENE of Mazatlan, Sinaloa State, Mexico.
The assay results are for infill and exploration drilling on the
Animas-Refugio vein in the Clemens-El Muerto sector. Drilling has been
completed in this sector of the vein and the company will release an
independent resource estimate in the 1st quarter of 2008.
Highlights
- SC-07-98 - 5.59
meters grading 1.57 g/t gold and 223 g/t silver
- SC-07-99 - 7.91
meters grading 1.10 g/t gold and 138 g/t silver
- SC-07-103 - 15.53
meters grading 0.44 g/t gold and 62 g/t silver
- SC-07-105 - 7.52
meters grading 0.87 g/t gold and 153 g/t silver
- SC-07-110A - 13.9
meters grading 0.63 g/t gold and 145 g/t silver
- SC-07-125 - 4.0
meters grading 1.67 g/t gold and 214 g/t silver
The following table presents a summary of the
results for drill holes SC-07-80 and SC-07-87 to SC-07-131:
|
Hole No.
|
From
(m)
|
To
(m)
|
Interval
(m)
|
True
Thickness (m)*
|
Au
(g/t)
|
Ag
(g/t)
|
Ag
Equivalent (g/t)**
|
|
SC-07-80
|
60.25
|
64.25
|
4.00
|
3.58
|
0.35
|
43
|
63
|
|
SC-07-89
|
70.25
|
72.25
|
2.00
|
1.00
|
0.66
|
75
|
111
|
|
SC-07-98
|
104.75
|
110.75
|
6.00
|
5.59
|
1.57
|
223
|
309
|
|
including
|
105.75
|
108.50
|
2.75
|
2.56
|
3.00
|
402
|
567
|
|
SC-07-99
|
115.00
|
123.50
|
8.50
|
7.91
|
1.10
|
138
|
199
|
|
including
|
118.25
|
122.00
|
3.75
|
3.49
|
1.89
|
240
|
344
|
|
SC-07-100A
|
138.50
|
152.00
|
13.50
|
11.26
|
0.44
|
69
|
93
|
|
including
|
139.50
|
141.50
|
2.00
|
1.67
|
1.96
|
195
|
302
|
|
SC-07-101
|
109.00
|
113.25
|
4.25
|
2.57
|
0.26
|
52
|
66
|
|
SC-07-102
|
140.00
|
152.75
|
12.75
|
9.61
|
0.43
|
71
|
95
|
|
including
|
148.00
|
150.50
|
2.50
|
1.89
|
0.88
|
145
|
193
|
|
SC-07-103
|
9.50
|
26.00
|
16.50
|
15.53
|
0.44
|
62
|
86
|
|
including
|
19.00
|
25.00
|
6.00
|
5.65
|
0.65
|
100
|
136
|
|
SC-07-104
|
13.00
|
32.00
|
19.00
|
15.83
|
0.09
|
25
|
30
|
|
SC-07-105
|
156.50
|
166.50
|
10.00
|
7.52
|
0.87
|
153
|
201
|
|
including
|
156.50
|
160.25
|
3.75
|
2.82
|
1.51
|
249
|
332
|
|
SC-07-106
|
24.50
|
47.00
|
22.5
|
20.70
|
0.20
|
32
|
43
|
|
SC-07-107A
|
109.00
|
111.75
|
2.75
|
2.32
|
0.06
|
33
|
36
|
|
SC-07-108
|
47.00
|
52.00
|
5.00
|
3.54
|
0.52
|
92
|
121
|
|
including
|
48.00
|
49.75
|
1.75
|
1.24
|
1.08
|
181
|
240
|
|
SC-07-110A
|
3.00
|
18.50
|
15.5
|
13.9
|
0.63
|
145
|
180
|
|
including
|
10.50
|
15.50
|
5.00
|
4.47
|
1.48
|
358
|
440
|
|
SC-07-113
|
77.50
|
83.75
|
6.25
|
5.01
|
0.74
|
85
|
126
|
|
including
|
80.75
|
82.00
|
1.25
|
1.00
|
1.53
|
175
|
260
|
|
SC-07-114
|
137.00
|
141.50
|
4.50
|
3.09
|
0.36
|
61
|
81
|
|
SC-07-116
|
27.00
|
30.50
|
3.50
|
2.47
|
0.69
|
128
|
166
|
|
SC-07-120
|
138.00
|
141.0
|
3.00
|
2.45
|
0.45
|
70
|
95
|
|
SC-07-124
|
32.00
|
34.75
|
2.75
|
2.63
|
0.94
|
148
|
199
|
|
SC-07-125
|
60.50
|
65.00
|
4.50
|
4.00
|
1.67
|
214
|
306
|
|
including
|
64.25
|
64.50
|
0.25
|
0.22
|
9.24
|
2810
|
3318
|
|
SC-07-126
|
77.75
|
82.75
|
5.00
|
3.91
|
0.77
|
136
|
178
|
|
including
|
80.00
|
81.50
|
1.50
|
1.17
|
1.11
|
252
|
313
|
|
SC-07-129
|
91.75
|
94.00
|
2.25
|
1.63
|
2.68
|
412
|
560
|
|
SC-07-131
|
86.00
|
87.75
|
1.75
|
1.42
|
0.15
|
21
|
30
|
- *True widths are estimated
by correcting for the strike and dip of the vein and the bearing and
inclination of the drill hole.
- **Ag Equivalent is the sum
of the Au multiplied by 55 plus the Ag grade.
- Holes
SC-07-87,88,90,91,92,93,94,95,96,97,111,,115,117,118,119,121,122,123,127,128&130
contain only anomalous values.
- Results for holes SC-07-109
and SC-07-112 are pending.
The drill
program included both infill and step out drill holes to define the extent of
mineralization both down dip and along strike. Many of the holes
peripheral to known mineralization contained only anomalous gold and silver
values as expected. Previous press releases included results up to and
including SC-07-86 with the exception of SC-07-80.
The
mineralization in the Clemens-El Muerto sector varies considerably in
width. Wider, lower grade zones near surface may be amenable to open
pit mine development. Narrower and higher grade zones have potential
for underground mining. Preliminary metallurgical test work by PRA of
Vancouver indicated recoveries above 80% for both gold and silver for both
standard flotation and cyanide leach processes. This work was
undertaken on a single sample composite taken from the historic workings at
both the Clemens and El Muerto mines. These flotation results were
confirmed by a custom mill located within 7 km of the Animas-Refugio
vein.
Phase III
drilling at Copala is focused on the La Colorada vein. This area of
current drilling is located about 5.5 km WSW from the Clemens-El Muerto
sector. Initial results from the Phase III drilling are expected in
January.
Samples were
assayed by ALS Chemex in Vancouver. Blank, standard and duplicate pulp
samples have also been assayed by ALS Chemex and duplicate core samples have
been sent to SGS Lakefield in Toronto, Ontario. The results for these
QA/QC samples have been acceptable in the mineralized intervals and
additional QA/QC analyses are in progress.
Hugh
Willson, Vice President of Exploration for Silverstone and a qualified person
under NI 43-101, has reviewed the contents of this news release and
supervised the Copala Project for Silverstone since its inception.
The company
has granted 100,000 incentive stock options at a price of $2.50 for a period
of five years to employees of the company.
ABOUT
SILVERSTONE
Silverstone
is a growth oriented silver mining company with 100% of its revenue from
silver production. Silverstone expects to have 2007 silver sales of
approximately
0.7 million ounces and increasing to 3 million ounces in 2009. More
information is available online at: www.silverstonecorp.com
.
For further
information about the Company, please contact:
Chris Tomanik, Telephone: (604) 637.8151 / Facsimile: (604) 688-2180
Email: ctomanik@silverstonecorp.com
THE TSX
VENTURE EXCHANGE HAS NEITHER APPROVED OR DISAPPROVED OF THE CONTENTS HEREIN.
This news release does not constitute an offer to
sell or a solicitation of an offer to sell any of the securities in the
United States. The securities have not been and will not be registered
under the United States Securities Act of 1933, as amended (the "U.S.
Securities Act") or any state securities laws and may not be offered or
sold within the United States or to U.S. Persons unless registered under the U.S.
Securities Act and applicable state securities laws or an exemption from such
registration is available.
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