Nov 12, 2004
MAG Silver Announces Strong Gold Indications in Drilling at Lagartos NW and the Acquisision of 12,000 Hectares of New Ground at Sierra Ramirez
MAG Silver Corp. (TSX-V:MAG) announces completion of the 1500 metre, Stage 1 drilling program at its Lagartos Project, 25 kilometres northwest of the Fresnillo District, Zacatecas, along the famous Fresnillo Trend. Drill targets are in areas of virtually-complete cover flanking a rhyolite flow-dome emplaced into structures related to the Fresnillo Trend. The rhyolites are affected by pervasive advanced argillic alteration and silicification. Drilling was targeted on coincident NSAMT geophysical, soil geochemical, and SWIR-detected (Short-Wave Infra-Red) alteration assemblages.
Hole 1 was drilled on the northwest side of the flow dome complex in an area with a strong NSAMT anomaly. Advanced argillic alteration in the top 25 metres of the hole was moderately strong and Hg in the upper 200 metres of the hole ranged from 100 to 5400 ppb. One intercept at 35 m depth returned 251 ppb Au. The deep anomaly proved to reflect a rhyolite dike rather than a vein.
In strong contrast, Hole 2 was drilled on the southern flank of the flow dome complex nearer the projection of the major regional NW-trending structure. The hole cut 65 m of pervasive advanced argillic alteration before entering 700 metres of pervasively silicified and variably pyritic (2-20% dispersed and veinlet pyrite) volcanic rocks. This zone is cut by numerous high-angle structures, some of which control variable argillic alteration and others that control partial to complete oxidation. One of these structures, at 235 metres depth, carries 1.3 g/T Au with 13 g/T Ag. This zone is profoundly oxidized and recovery was only 50%. Three other 0.7 to 1.2 metre intervals over the next 100 metres carry 200-300 ppb Au. Results are not yet complete, but the silicified and argillically altered materials show a strong toxic metals response (Sb: 20-460 ppm; As: 300-7770 ppm; and Hg: 50-1180 ppb).
MAG President George Young said "All the signs are indicating that the Lagartos NW area is the high level manifestation of a potentially major epithermal system. We have traced a major regional structure 30 kilometres from the world's biggest silver mine into an area of nearly complete cover and hit strong indications of gold-silver mineralization on our second hole. Although we have a lot less exposure to work with than at Juanicipio and we don't have the benefit of drilling next-door, the alteration appears much stronger than at Juanicipio and the mineralization hit so far is much shallower. We have completed a detailed regional structural analysis and expect to use that to guide more NSAMT, SWIR, Biogeochem and drilling in the immediate future.
MAG is also pleased to report that reconnaissance examination of the Sierra Ramirez district reveals that the widespread high-grade Ag-Pb-Zn mineralization previously reported (See Press Release of August 30, 2004) extends well beyond their 4,443 hectare core claim into open ground. Based on these reconnaissance results, MAG has claimed 11,167 hectares of this adjacent open ground, including a vacated claim internal to their original holding. This brings their total holdings in the district to over 15,500 hectares. Additional district-scale sampling has been completed and assays are pending. These results will be compiled with existing data to evaluate district-scale metals ratio zoning patterns and generate targets for drilling in early 2005.
The exploration program at Sierra Ramirez forms a part of the $2,000,000 exploration program for 2004 previously approved by the MAG board of directors, which includes further drilling at Lagartos and drilling later in the fall at the Batopilas project; both described below.
MAG is also pleased to provide below an update on activity on its other projects in Mexico. Since inception in 2003, MAG has maintained a focus on projects in proven silver districts with potential in any conceivable silver-gold market including the current volatile markets.
Juanicipio Project, Zacatecas, Mexico: MAG's Phase 1 drilling verified that the mineralization common in the adjacent Fresnillo Mine continues into Juanicipio from the historic mining areas on at least four structures. Phase 2 targeted a structure not reached in Phase 1 due to drilling problems (Hole 8) and a structural intersection 800 metres west of the zone of Phase 1 intercepts (Hole 9). Hole 8 cut a strong fault zone 0.8 m wide running 1.3 g/T Au and 13 g/T Ag at 630 m downhole. Recovery was 65%. These results indicate that significant gold mineralization continues into this area, but has been disrupted by post-mineral faulting. The degree of faulting indicates that the principal target structure in this area has still not been reached. Hole 9 cut 18 narrow quartz and calcite veinlets between 600 and 725 m, one of which ran 106 g/T Ag. Note that neither of the Phase 2 holes were offsets of mineralized veins cut in Phase 1; MAG intends to focus Phase 3 exploration on these structures.
Don Fippi Project, Batopilas District, Chihuahua: The drill permitting process has been initiated and MAG is pleased to report that the local community gave unanimous approval of MAG's request for surface access. Drilling is slated to begin as soon as a suitable helicopter portable rig is available. Heavy rains in late October destroyed some of the access roads to the area further delaying progress.
Cinco de Mayo Project, Benito Juarez District, Chihuahua State: Heavy rains washed out roads leading to the property, so planned detailed geochemical sampling and geophysical surveys will be undertaken as soon as access roads are navigable. This will delay drilling until first quarter of 2005.
Guigui Project, Santa Eulalia District, Chihuahua: MAG continues to reexamine the results of its Phase 1 drilling program near the recently reactivated San Antonio Mine. MAG's Phase 1 Holes 5 and 6 both cut 40-100 m wide breccias laced with Ag-Pb-Zn sulfide stringers along the same structure which hosts the principal San Antonio orebody 1200 m north. A downhole BHUTM survey indicated a conductive anomaly adjacent to the drill holes.
Qualified Person and Quality Assurance and Control
Dr. Peter Megaw, Ph.D., C.P.G., has acted as the Qualified Person as defined in National Instrument 43-101, for this disclosure and supervised the preparation of the technical information in this release. Dr. Megaw has a Ph.D. in geology and more than 20 years of relevant experience focussed on silver and gold mineralization, and exploration and drilling in Mexico. He is a Certified Professional Geologist (CPG 10227) by the American Institute of Professional Geologists and an Arizona Registered Geologist (ARG 21613). Dr. Megaw is not independent as he is a MAG Silver shareholder and a vendor of two projects, other than Juanicipio, whereby he may receive additional shares. Readers are referred to the qualifying report dated November 19, 2002 by Pincock, Allen and Holt, Qualified Person, available at www.magsilver.com .
About MAG Silver Corp.
MAG Silver, based in Vancouver Canada, is focussed on exploration targets in the Mexican Silver Belt that are of interest at any conceivable silver price, in districts with known large-scale production.
On behalf of the Board of
MAG SILVER CORP.
"George S. Young"
- 30 -
For further information on behalf of MAG Silver Corp. contact George S. Young
Phone: (604) 630-1399
Toll free: (866) 630-1399
Fax: (604) 484-4710
The TSX Venture Exchange has not reviewed and does not accept responsibility for the accuracy or adequacy of this news release, which has been prepared by management.