SAMPLING AT TAVICHE PROJECT, MEXICO CONFIRMS HIGH
PRECIOUS METALS
AND PREPARES WAY FOR DRILL PROGRAM
Brampton, Ontario – May 3, 2007 – Aura Silver Resources Inc. (TSX-V:AUU) (the “Company” or “Aura Silver”) is pleased to provide recent results from a sampling program conducted over the Taviche Property in Oaxaca, Mexico. The program was carried out as an initial evaluation of the property and to confirm and follow-up on work done by Pan American Silver Corporation in 2002.
Sampling of exposed vein systems and areas of historical workings confirms the presence of high silver and gold on the Taviche Property. Table 1 outlines selected silver and gold assays for samples collected from several abandoned mines and pits developed along vein systems within the West Taviche Concession. Sampling was carried out by Pan American Silver (PanAm) in 2002 and by Aura Silver and Intrepid Mines (AUU/IAU) from December 2006 through March 2007.
Table 1. Summary of Results from Dumps and Pits along the West Taviche Vein Systems
Prospect/Vein |
Company |
Sample
No.
|
Assay |
Comments
|
Au (g/t) |
Ag (ppm) |
El Portillo - Pit |
PanAm |
EP28 |
5.21 |
11.6 |
Massive to banded quartz vein |
El Portillo - Pit |
PanAm |
EP29 |
13.73 |
17.8 |
Colloform-banded quartz vein |
El Portillo Mine |
PanAm |
EP30 |
8.01 |
22.8 |
Massive to banded quartz vein |
El Portillo Mine |
PanAm |
EP37 |
8.17 |
26.6 |
Massive to banded quartz vein |
El Portillo Mine |
AUU/IAU |
565 |
18.20 |
23.7 |
Banded to colloform quartz vein |
San Martin Mine |
PanAm |
M-4 |
17.43 |
800 |
Banded to colloform quartz vein |
San Martin Mine |
PanAm |
M-5 |
5.00 |
46 |
Banded to colloform quartz vein |
San Martin Mine |
PanAm |
M-6 |
18.20 |
715 |
Banded to colloform quartz vein |
San Martin Mine |
PanAm |
M-10 |
5.09 |
488 |
Banded to colloform quartz vein |
San Martin Mine |
AUU/IAU |
541 |
94.70 |
1,845 |
Sucrosic to colloform-banded quartz vein |
San Martin Mine |
AUU/IAU |
542 |
31.90 |
792 |
Sucrosic quartz vein; variable base metals |
San Martin Mine |
AUU/IAU |
543 |
11.00 |
467 |
Banded to colloform quartz vein |
San Martin Mine |
AUU/IAU |
544 |
23.50 |
1410 |
Banded to colloform quartz vein |
La Noria Shaft |
AUU/IAU |
77305 |
17.10 |
751 |
Quartz vein & silicified andesite |
La Noria Shaft |
AUU/IAU |
509 |
2.05 |
164 |
Banded sucrosic quartz vein |
La Noria Shaft |
AUU/IAU |
511 |
4.42 |
283 |
Vein breccia; locally banded |
La Noria Shaft |
AUU/IAU |
512 |
5.18 |
329 |
Sucrosic quartz vein |
San Antonio Shaft |
AUU/IAU |
521 |
1.85 |
39.8 |
Vein breccia |
San Antonio Shaft 1 |
PanAm |
SA18 |
5.28 |
53 |
Vein breccia |
San Antonio Shaft 2 |
PanAm |
SA19 |
3.57 |
123 |
Vein breccia |
Au (g/t) – Gold (grams/tonne)
Ag (ppm) – Silver (parts per million)
A summary of all geochemical data (513 samples) collected from both West and East Taviche Concessions is presented in Table 2 (including samples from Pan American Silver taken in 2002). Samples collected by Aura Silver/Intrepid Mines were sent to ALS Chemex in Guadalajara, Mexico for multi element geochemical analyses by ME-ICP41 and for gold by fire assay and AAS finish (0.005-10ppm). Samples over 10 ppm were assayed bygravimetric technique. Every 10th sample included a blank and every 25th sample included a known standard.
Table 2: Summary of Gold and Silver Values for Sampling Conducted in the West and East Taviche Concessions
Range (ppb Au) |
# Samples |
% of Population |
<50 ppb |
251 |
48.9 |
51 – 100 ppb |
63 |
12.3 |
101 – 1,000 ppb |
129 |
25.1 |
1,001 – 5,000 ppb |
46 |
9.0 |
5,001 – 10,000 ppb |
13 |
2.5 |
> 10,000 ppb |
11 |
2.1 |
Total |
513 |
100 |
Range (ppm Ag) |
# Samples |
% of Population |
<10 ppm |
362 |
70.6 |
10.1 – 50 ppm |
82 |
16.0 |
50.1 – 100 ppm |
25 |
4.9 |
100.1 – 250 ppm |
19 |
3.7 |
250.1– 500 ppm |
14 |
2.7 |
> 500 ppm |
11 |
2.1 |
Total |
513 |
100 |
Geologic mapping of the vein systems by Aura Silver/Intrepid Mines personnel reveals that surface vein exposures are dominated by hydrothermal breccias with lesser amounts of massive to banded quartz-chalcedony veins. Historical mining occurred intermittently along the vein systems and appears to have been located at structural intersections of cross-cutting veins. As shown in Table 1, samples from the old mine dumps commonly contain in excess of 5 grams per tonne gold (g/t Au) and 200 grams per tonne silver (g/t Ag) with values up to 94.7 g/t Au and 1,845 g/t Ag. The geochemical and textural results suggest an epithermal vein environment that is exposed at relatively high-levels in the northern extent of the vein systems and at somewhat lower levels in the south. Gold and silver mineralization is hosted by quartz veins with variable adularia and amethyst. Ore-related minerals consist of pyrite, native gold, native silver,
argentite and silver-bearing sulfosalts. Base metal contents are typically low but locally can be up to several percent.
The Taviche Property was acquired by Aura Silver and Intrepid Mines (TSX:IAU - TSX:IXN - ASX:IAU) in 2006 and is held under option from Plata Panamericana S.A. de C.V., a wholly owned subsidiary of Pan American Silver Corporation (TSX:PAA). The Property comprises two concessions: West Taviche with 6,254 hectares and East Taviche with 7,494 hectares. The Concessions are located in central Oaxaca, Mexico about ten kilometres south of the City of Ocotlan. In this area, gold and silver production has occurred intermittently since Spanish colonial times and a few mines were active until 2000.
The West Taviche concession contains two significant, north-south trending, sub-parallel vein systems. A western system has been traced over seven kilometers and consists of four distinct veins: La Noria, El Viejo, San Antonio and San Martin. A second system, located about two kilometers east, can be followed along a series of anastamosing veins for about six kilometers and contains the Portillo, Donaji/Marias and San Jose/Corona Veins. The northern three kilometers of this system (the San Jose/Corona segment) is held by Fortuna Silver Mines and Continuum Resources. They have recently announced a 43-101 qualified resource comprising an indicated mineral resource of 1.47 million tonnes grading 262.6 grams per tonne silver (g/t Ag) and 2.19 grams per tonne gold (g/t Au) containing 17.7 million silver (Ag) equivalent ounces and an inferred mineral resource of 3.9 million
tonnes grading 260.6 g/t Ag and 2.57 g/t Au containing 49.1 million silver equivalent ounces. Drilling along the northern boundary of the Fortuna/Continuum property indicates that the on-strike, down plunge extension potential for the San Jose vein system may lie on the West Taviche Concession (Aura Press Release, March 13, 2007).
In addition to the detailed studies along the two known vein systems, a reconnaissance program has been conducted over the remainder of the West Taviche Block where initial work has outlined several other large, prospective areas not previously identified in past work. A reconnaissance program has also been conducted over the East Taviche Block where the Mexican Government (“Consejo”) has identified numerous gold-silver bearing vein prospects. Results of this work are being compiled and will be reported in a further press release.
Taviche is the flagship project for Aura Silver. “We are excited with the potential that this property offers for discovery of the extension of San Jose high grade silver-gold veins onto our West Taviche Concession,” said Paul Pitman, President of Aura. “ As noted in our January 17, 2007 press release, an aggressive field program has already been initiated. Detailed sampling and mapping on the Western Concession have commenced to better define drill targets along the vein systems where old workings indicate past production. Permitting for a drill program by mid-year is under way.”
Map1. Taviche Project, Mexico - Target Vein Structures
Click on image above for larger view in PDF
About Aura Silver
Aura Silver Resources is a TSX Venture listed company engaged in the acquisition, exploration and development of precious metal prospects. The Company has 28,219,687 common shares outstanding.
For further information contact:
Paul W. Pitman, P.Geo., President and designated QP
Phone:
(905) 456-5436
Email: paul@aurasilver.com
Investor Relations
Dani Wright
Phone: (866) 981-4588 ext. 242
Website: www.aurasilver.com
FORWORD LOOKING STATEMENTS
This Press Release may contain forward looking statements that involve a number of risks and uncertainties. Actual events or results could differ materially from the Company's expectations and projections. The TSX Venture Exchange has neither approved nor disapproved the information contained in this press release. |