El Tesoro First Phase Drill Program Yields High Grade Gold Values Land Position Expanded
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April 21, 2004
International Northair Mines Ltd. (TSXV:INM) has completed a first phase, reverse circulation drill program at the El Tesoro Project, Durango State, Mexico. Based on the encouraging results obtained, Northair is planning a follow up drill program.
Highlights from the program include:
- 16.87 g/t gold and 122.3 g/t silver over 4.57m in the A Zone
- 13.60 g/t gold and 18.4 g/t silver over 3.05m in the A Zone
- 10.80 g/t gold and 69.6 g/t silver over 0.76m in the E Zone
- 3.38 g/t gold and 17.0 g/t silver over 9.91 m in the B Zone
- 11.20 g/t gold and 56.2 g/t silver over 0.76m in the D Zone
The drill program was designed to: 1) confirm the down-dip extension of mineralization in five of the seven currently known gold bearing zones, 2) perform limited reconnaissance drilling in areas with minimal surface exposure, 3) increase geological knowledge of the controls and influences of mineralization. The program succeeded in fulfilling all three objectives.
Drilling and related surface sampling have shown that the El Tesoro property contains an intensely mineralized system, strongly anomalous in gold throughout. This 1800 metre, first phase drill program tested less than 15% of the apparent strike length of the presently known 2.5 kilometre mineralized system. Based on the results of the drill program, Northair has increased its land position from 1000 to 3204 hectares.
Drill Program Discussion
Please read the attached table for a complete summary of first phase drill results.
12 drill holes in the A and E Zones, over a combined strike length of 130 metres, successfully tested the down-dip extension of the strong gold and silver mineralization in a rhyolite intrusive exposed in shallow underground workings and surface trenching. Both zones remain open along strike and down dip.
Drilling of the B, C and D Zones was more reconnaissance in nature, with the longest holes of the program in the B and C Zones. Positive results were obtained from the northernmost hole of the B Zone, which encountered a significant intersection of the favourable rhyolite intrusive with strong gold and silver values. The hole targeted to intersect the C Zone did not return significant gold values and apparently failed to penetrate the zone. Drilling at the D Zone showed wide, strongly silicified breccia zones, with two holes returning significant gold values over narrow widths. The Company is particularly encouraged by the results from this zone.
Exploration Plans
Based on these drill results, Northair has embarked on an expanded exploration program at El Tesoro designed to formulate the optimum follow-up drill program on the property. Over the next three months, the Company will continue to explore the seven known zones, while expanding the exploration program on the remainder of the property.
Detailed geological mapping and sampling, working outward and along strike from known zones, has commenced. Road access to G zone will be completed to enable mechanical trenching and geological surveying and the F zone will be further sampled via trenching. Trial geochemical and geophysical surveys will also be conducted to locate possible overburden covered zones and extensions of known zones.
Continued property wide geological mapping and reconnaissance sampling will be undertaken, as only approximately 10% of the newly expanded, and geologically prospective, land package has been investigated.
Summary of El Tesoro First Phase Drill Program, March 2004
A ZONE
|
HOLE |
DEPTH(m) |
INTERVAL (m) |
Au (g/t) |
Ag (g/t) |
TOTAL DEPTH - METERS |
|
TRC-04-001 |
21.34 - 25.15 |
3.81 |
5.10 |
26.5 |
76.2 |
|
including |
21.34 - 21.52 |
2.29 |
7.69 |
35.6 |
|
|
and |
28.19 - 28.96 |
0.76 |
1.98 |
7.9 |
|
|
TRC-04-002 |
18.29 - 22.10 |
3.81 |
4.85 |
26.8 |
54.86 |
|
and |
29.72 - 30.48 |
0.76 |
1.28 |
3.6 |
|
|
TRC-04-003 |
11.43 - 15.24 |
3.81 |
mine workings |
|
45.72 |
|
|
15.24 - 16.76 |
1.52 |
3.26 |
30.3 |
|
|
and |
32.00 - 35.05 |
3.05 |
1.48 |
31.7 |
|
|
TRC-04-004 |
22.10 - 22.86 |
0.76 |
1.10 |
6.6 |
45.72 |
|
TRC-04-005 |
48.77 - 51.05 |
2.29 |
6.13 |
24.6 |
76.2 |
|
including |
48.77 - 49.53 |
1.52 |
8.22 |
30.1 |
|
|
TRC-04-006 |
17.53 - 22.10 |
4.57 |
16.87 |
122.3 |
45.72 |
|
|
22.10 - 23.62 |
1.52 |
mine workings |
|
|
|
|
23.62 - 25.15 |
1.53 |
6.33 |
48.0 |
|
|
TRC-04-020 |
73.15 - 76.20 |
3.05 |
13.60 |
18.4 |
86.87 |
|
including |
73.15 - 74.01 |
0.76 |
46.90 |
42.0 |
|
E ZONE
|
HOLE |
DEPTH(m) |
INTERVAL |
Au (g/t) |
Ag (g/t) |
TOTAL DEPTH - METERS |
|
TRC-04-007 |
15.24 - 16.76 |
1.52 |
3.04 |
15.9 |
54.86 |
|
TRC-04-008 |
17.53 - 19.81 |
2.29 |
3.41 |
14.6 |
37.34 |
|
TRC-04-009 |
13.72 - 15.24 |
1.52 |
1.52 |
7.7 |
36.58 |
|
and |
23.62 - 27.43 |
3.81 |
4.09 |
15.8 |
|
|
including |
23.62 - 25.91 |
2.29 |
5.52 |
21.4 |
|
|
or including |
24.38 - 25.15 |
0.77 |
9.82 |
26.0 |
|
|
TRC-04-010 |
16.76 - 19.05 |
2.29 |
4.33 |
9.7 |
40.39 |
|
including |
17.53 - 18.29 |
0.76 |
10.05 |
15.8 |
|
|
and |
29.72 - 32.00 |
2.29 |
2.38 |
10.0 |
|
|
TRC-04-011 |
30.48 - 31.24 |
0.76 |
1.46 |
8.3 |
76.2 |
|
and |
55.63 - 59.44 |
3.81 |
3.20 |
23.3 |
|
|
including |
57.91 - 59.44 |
1.52 |
6.12 |
41.9 |
|
|
or including |
57.91 - 58.67 |
0.76 |
10.80 |
69.6 |
|
B ZONE
|
HOLE |
DEPTH(m) |
INTERVAL |
Au (g/t) |
Ag (g/t) |
TOTAL DEPTH - METERS |
|
TRC-04-012 |
103.63 - 105.16 |
1.52 |
2.64 |
2.6 |
228.6 |
|
and |
109.73 - 112.78 |
3.05 |
2.92 |
10.8 |
|
|
and |
140.21 - 140.97 |
0.76 |
3.76 |
6.3 |
|
|
and |
161.54 - 162.31 |
0.76 |
1.23 |
2.8 |
|
|
and |
170.69 - 171.45 |
0.76 |
1.33 |
2.2 |
|
|
TRC-04-013 |
121.16 - 131.06 |
9.91 |
3.38 |
17.0 |
170.69 |
|
including |
124.97 - 128.02 |
3.05 |
7.40 |
14.3 |
|
|
or including |
124.97 - 126.49 |
1.52 |
10.90 |
52.9 |
|
|
TRC-04-019 |
|
|
NSV |
NSV |
239.27 |
D ZONE
|
HOLE |
DEPTH(m) |
INTERVAL |
Au (g/t) |
Ag (g/t) |
TOTAL DEPTH - METERS |
|
TRC-04-014 |
33.53 - 35.05 |
1.52 |
6.87 |
10.9 |
88.39 |
|
including |
34.29 - 35.05 |
0.76 |
11.80 |
13.0 |
|
|
TRC-04-015 |
45.72 - 48.01 |
2.29 |
2.27 |
7.0 |
85.34 |
|
including |
45.72 - 46.48 |
0.76 |
5.18 |
9.6 |
|
|
and |
51.05 - 51.82 |
0.76 |
11.20 |
56.2 |
|
|
and |
64.01 - 64.77 |
0.76 |
1.17 |
7.8 |
|
|
and |
70.10 - 70.87 |
0.76 |
2.16 |
15.8 |
|
|
TRC-04-016 |
|
|
NSV |
NSV |
80.77 |
|
TRC-04-017 |
|
|
NSV |
NSV |
50.29 |
For further information, please visit the �Projects > El Tesoro� section at: http://www.northair.com/international .
The exploration program is under the direction of Mr. Jim Robinson, Vice President of the Company, who is a Qualified Person as defined by NI 43-101. The Company maintains a quality control program in the preparation and shipping of all samples from the property to the laboratory. Analysis has been performed by ALS Chemex Laboratories in Vancouver with sample preparation at their facilities in Hermosillo , Mexico . Gold values are determined by a 50 gram fire assay with an atomic absorption finish, while silver results are obtained through a 50 element aqua regia digestion. Samples are reanalyzed by a one tonne fire assay with a gravimetric finish for initial gold values greater than 5 g/t and silver values greater than 100 g/t.
The Company maintains a program of duplicates, blanks and standards in addition to the laboratories internal quality control program. A program of check analyses by a different analytical laboratory of selected pulps, rejects and second splits from the drill program will also be carried out.
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