SUMMARY
This Exploration Contract covers
an area of approximately 16.4 square kilometers and was
granted for an initial period of two years in May of 2007.
The contract can be renewed for a further 3 year period.
The area encompasses several small mines that produced
antimony from high grade veins at the end of the 19th and
at the beginning of the 20th century. Gold is known to
have been recovered from the antimony veins toward the
end of the life of the antimony mines. Drifting along veins
at Alto Sobrido by the Portuguese State Mining authority
(Servico do Fomento Mineiro) in the 1960’s
encountered pockets of high grade gold mineralisation associated
with the antimony veins.
From 1998 to 2002 Connary Minerals explored the area. Work
consisted of the completion of 2 diamond holes for 188 meters,
the completion of 30 percussion holes for 714 meters, channel
sampling of underground workings, extensive surface sampling
and trenching.
Earlier work completed on the property includes the completion
of 4 holes diamond drill holes by CBD (a Joint Venture between
BRGM, EDM and Empresa Carbonifera de Douro). The holes drilled
were SS1 to SS4 for 211.0 meters, the JV also conducted surface
sampling along mineralized structures and underground channel
sampling.
Diamond drilling on both the Alto Sobrido and Ribeiro da
Serra prospects is planned to commence early in 2008.
There are three main known prospects within the Alto Sobrido
concession and they are aligned along a 4 kilometer long
northwest trending zone. From south to north they are as
follows
Alto do Sobrido, the Ribeiro
da Serra and the Tapada Prospects
Alto do Sobrido
There are small surface and underground workings at the
Alto do Sobrido. The project area is situated on the western
limb of the Valongo Anticline. The workings here are confined
to an area of 300 meters x 500 metres. Most of the workings
relate to the mining antimony in the late 19th century. However
there is evidence that gold was recovered from the mineralized
system. In addition extensive sampling has shown the presence
of pervasive gold mineralization in the area.
Drilling, trenching and sampling has identified 3 veins sub
parallel to each other and generally striking east west.
They are:
Vein A: This has been intersected in 3
places by drilling and returned values as: 3.2% Antimony
across 2.0 meters (percussion) 3.92% Antimony over 4.75 meters
(diamond drill) and 1.17 % Antimony over 1.0 meters (diamond
drill). These intercepts occur from near surface up to 50
meters below surface.
Vein B: Has four intercepts,
three from percussion holes and one from diamond drill (2.0%
Antimony across two meters). Vein C: Has
two intercepts, one from percussion drilling and one from
diamond drilling (2.1% Antimony across 1.65 meters).
All of the intercepts have gold mineralization associated
with them noted as: 9.20 g/t Au across 1.0 meter in Percussion
Hole 6 and 9.8 g/t Au across 1.0 meter at a depth of 33 meters
from Percussion Hole 17. In addition diamond drill hole DDAS
1 recorded an assay of 1.16 g/t Au across 1.65 meters from
this vein. Most other gold values are in the 0.5 g/t to 1.0
g/t Au across 1.0 meter range.
True widths of the individual veins are estimated, from
underground observations, to be between 0.25 meters and 2.0
meters.
The Servico do Fomento Mineiro completed
and sampled some 300 meters of tunneling in the mid 1960’s.
Channel sampling across the vein structure exposed in the
Adit Minus 25m level returned strong antimony values along
with exceptional gold grades:
Location
Within adit -25m |
Sample # |
Width
of sample across
the vein meters |
Antimony
% |
Gold
g/t Au |
Silver
g/t Ag |
56 W |
3 |
0.90 |
1.9 |
165.6 |
29.5 |
56 W |
2 |
0.50 |
1.3 |
139.0 |
21.4 |
56 W |
1 |
1.00 |
7.2 |
120.3 |
31.7 |
These grades are NOT representative but show that high grade
pockets of gold exist in association with the antimony. More
representative grades and widths are recorded as follows:
Location
Within adit -25m |
Sample # |
Width
of sample across
the vein meters |
Antimony
% |
Gold
g/t Au |
Silver
g/t Ag |
62
W |
27 |
0.20 |
0.3 |
2.3 |
1.5 |
62
W |
26 |
0.21 |
2.2 |
3.4 |
2.1 |
62
W |
25 |
0.22 |
4.5 |
20.7 |
3.6 |
62
W |
24 |
0.50 |
11.3 |
9.5 |
1.5 |
62
W |
23 |
0.93 |
29.5 |
11.6 |
2.9 |
62
E |
28 |
0.80 |
8.1 |
9.6 |
2.1 |
77
W |
41 |
0.33 |
1.5 |
3.4 |
0.4 |
77
W |
40 |
0.60 |
3.3 |
1.0 |
1.1 |
77
W |
39 |
0.34 |
0.6 |
1.0 |
1.4 |
77
W |
38 |
0.50 |
1.0 |
3.0 |
2.4 |
77
W |
37 |
1.50 |
- |
4.9 |
1.6 |
To west of the area a well silicified and brecciated structure
of variable width (4 to 16 meters) has been identified by
surface mapping, channel and chip sampling, trenching and
by several drill holes (both percussive and diamond drill
holes). The structure strikes initially to the north for
some 200 meters. When striking north the structure dips steeply
to the east.
Mapping has shown the structure then swings to the east
and has been traced for another 100 meters. As the structure
swings to the east the dip appears to flatten. Channel sampling
and surface sampling has shown elevated values for gold along
the entire 300m meters of the structure identified to date.
Gold grades in trenching are as follows:
Trench |
Distance between trenches |
Width (meters) of trench |
Gold grade g/t Au |
Antimony % in the same
trench but not necessarily the same intercept |
SJS1 |
0 north |
8.0 meters |
1.4 g/t Au |
8.0 meters at 0.30% Sb |
SJS2 |
66 m north of 1 |
4.0 meters |
1.5 g/t Au |
10 meters at 0.10% Sb |
SJS5 |
150 m north of 2 |
16.9 meters |
1.24 g/t Au |
11.6 meters at 0.36% Sb |
SJS6 |
25 m north east of 5 |
16. 6 meters |
0.50 g/t Au |
16.6 meters at 0.25% Sb |
Kernow sampled the flat lying structure and returned values
as follows:
Sample # |
Location |
Zone |
Chip Length |
Gold (g/t) |
Silver (g/t) |
Antimony % |
312757 |
Alto Sobrido |
Silicified structure |
2.10 |
0.897 |
0.6 |
0.60% |
312758 |
Alto Sobrido |
Silicified structure |
0.40 |
23.20 |
1.4 |
3.60% |
Percussion drilling gave similar results to those seen in
trenching and they are tabulated below.
Hole N.° |
Maximum gold values |
Intervals (g/t gold/interval) |
PDAS5 |
1.20g/t/1m |
1.0g/t gold across 2 m; 0.6g/t gold
across 6m |
PDAS6 |
9.20g/t/1m |
3.05g/t gold across 4m; 1.33g/t gold
across 12m |
PDAS7 |
9.05g/t/1m |
3.17g/t gold across 6m; 1.61g/t gold
across 16m |
PDAS8 |
2.91g/t/1m |
1.76g/t across 4 m; 0.92g/t gold across
3m |
PDAS9 |
3.76g/t/1m |
1.99g/t gold across 4m; 1.33g/t gold
across 7m |
PDAS11 |
2.63g/t/1m |
No significant intercept |
PDAS12 |
1.72g/t/1m |
1.65g/t gold across 2m |
PDAS14 |
3.30g/t/1m |
1.75g/t gold across 4m |
PDAS15 |
1.52g/t/1m |
1.20g/t gold across 4m |
PDAS17 |
9.80g/t/1m |
5.48g/t gold across2m |
Ribeiro da Serra – Tapada
Prospects
Ribeiro da Serra is an old antimony mine located some 650
meters northwest of the Alto Sobrido prospect. There are
extensive underground workings but there are only two tunnels
are currently accessible, the remaining old workings being
flooded. The veins mostly trend in a northerly direction.
The flatter-lying veins have been found not to be particularly
rich in gold but have been extensively stoped during the
mining of antimony down to depth of about 150 m below surface.
Kernow has sampled the antimony veins and has recorded values
as follows:
Sample # |
Location |
Zone |
Chip Length |
Gold (g/t) |
Silver (g/t) |
Antimony % |
312762 |
Ribeiro da Serra |
Adit |
0.80 |
2.33 |
4.4 |
5.85% |
312763 |
Ribeiro da Serra |
Adit |
1.00 |
5.80 |
2.4 |
3.37% |
312764 |
Ribeiro da Serra |
Adit |
1.10 |
1.64 |
1.0 |
1.33% |
312765 |
Ribeiro da Serra |
Stope face |
0.40 |
32.00 |
4.1 |
15.99% |
Higher grade gold mineralisation is associated with
the steeply dipping quartz veins that cross cut the flat
lying antimony veins.
A review of previous data has shown that in
the Gallery One grades of the following tenor are recorded
from channel sampling (undertaken by Connary) across the
vein structure.
Sample
Numbers |
Location |
Length of
sample (m) |
Grade Au
(g/t) |
Grade Ag
(g/t) |
Grade Antimony
(%) |
Check Assay
g/t Au |
RS 9 |
Gallery 1 |
0.90 |
0.16 |
0.05 |
1.50 % |
|
RS 10 |
Gallery 1 |
0.60 |
0.64 |
2.00 |
1.70 % |
|
RS 11 |
Gallery 1 |
0.60 |
1.37 |
0.90 |
0.67 % |
1.44 |
RS 12 |
Gallery 1 |
0.40 |
1.29 |
1.80 |
1.40 % |
1.27 |
RS 13 |
Gallery 1 |
0.60 |
8.15 |
1.10 |
1.60 % |
|
RS 14 |
Gallery 1 |
0.50 |
2.24 |
2.40 |
1.80 % |
2.23 |
RS 15 |
Gallery 1 |
0.50 |
8.10 |
1.00 |
1.50 % |
|
RS 24 |
Gallery 1 |
0.80 |
2.20 |
2.00 |
2.00 % |
|
RS 26 |
Gallery 1 |
0.80 |
1.00 |
1.70 |
0.63 % |
|
The above samples were taken at varying intervals along
a 50 meter length of the Tunnel / Gallery 1 which strikes
to the north.
Kernow completed confirmation sampling in this gallery and
returned the following results:
Sample
Numbers |
Location |
Length of
sample (m) |
Grade Au
(g/t) |
Grade Ag
(g/t) |
Grade Antimony
(%) |
Check Assay
g/t Au |
312762 |
Gallery 1 |
0.80 |
2.36 |
4.4 |
5.85% |
2.33 |
312763 |
Gallery 1 |
1.00 |
5.78 |
2.4 |
3.37% |
5.80 |
312764 |
Gallery 1 |
1.10 |
1.63 |
1.0 |
1.33% |
1.64 |
Tapada Prospect
The Tapada deposit along with Fontinha
is located between 300m and 700 m North West of Ribeiro da
Serra and is a slightly larger mine development than Ribeiro
da Serra. The dominant trends of quartz veins are North-North
West and North East. Kernow sampled a quartz vein in the
adit Number Six with the following result:
Sample # |
Location |
Zone |
Chip Length |
Gold (g/t) |
Silver (g/t) |
Antimony % |
312766 |
Tapada |
Adit 6 |
0.40 |
6.16 |
2.0 |
0.12% |
NOTE:
The assay and sampling results quoted in the foregoing document
are historical results. Kernow is in the process of verifying
the data by conducting its own surface and underground sampling.
In addition Kernow will re-sample and re-assay diamond drill
core from the two drill holes DDAS-01 and DDAS-02
To date the majority of the confirmation samples taken by
Kernow have returned higher antimony values than previously
recorded. Kernow believes this is due to the application
of a different more accurate assaying technique for antimony.
About Antimony
In common with most industrial metals,
antimony is enjoying strong market conditions with prices
having strengthened during the last two years to the current
level of US$5,600/t ($2.55 /lb) for Antimony ingots. Supplies
from China, which has historically contributed about 85%
of world production, have tightened, opening opportunities
for other producers to sell into a market where demand
is forecast to grow at some 5% per annum.
Links to web sites about Antimony
www.antimony.net

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