MAG Silver Corp.
AMEX : MVG
TSX : MAG

MAG Silver Corp.

July 16, 2008 09:00 ET

MAG Silver Reports Deep Intersection of High Grade Silver on Valdecanas Vein

VANCOUVER, BRITISH COLUMBIA--(Marketwire - July 16, 2008) - MAG Silver Corp. (TSX:MAG)(AMEX:MVG) ("MAG") on behalf of Minera Juanicipio SA (a joint venture between Fresnillo plc (56%) and MAG (44%)) is pleased to announce assay results from the Valdecanas Vein for Hole GE. This hole was not included within the resource estimate recently reported for the Valdecanas Vein (see press release dated June 18, 2008).

Hole GE intersected two veins separated by 10 metres of altered and veined wall rock. The upper gold rich vein reports as 123 g/t (3.6 opt) silver, 4.89 g/t gold, 1.24% lead and 4.92% zinc over 7.38 metres (true width). This includes a higher grade intercept of 166 g/t (4.8 opt) silver, 5.89 g/t gold, 1.42% lead and 6.42% zinc over 3.0 metres (see longitudinal section attached). The lower silver rich vein has returned 1,179 g/t (34.4 opt) silver, 1.98 g/t gold, 3.01% lead and 2.21% zinc over 4.71 metres (true width). This also includes a high grade gold and silver intercept of 6,310 g/t (183.9 opt) silver, 10.05 g/t gold, 7.63% lead and 5.23% zinc over 1.0 metres.

Hole GE is one of the deepest holes to test the Valdecanas Vein to the west and this intersection remains open down dip.

"We are extremely pleased with these results because they indicate the continuation of the high grade silver and gold to depth in the western part of the Valdecanas Vein," said Dan MacInnis, President and CEO of MAG Silver.

The results reported here are part of a 25,000 metre drill program being carried out on the Juanicipio property in 2008. The bulk of the drilling is directed towards defining the Valdecanas Vein with the aim of producing a 43-101 compliant resource report later in the year.



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Hole # Width Silver Silver Gold Lead Zinc True
Valdecanas From To metres g/t opt g/t % % Width
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JI-08-GE
Upper Vein 823.15 831.00 7.85 123 3.6 4.89 1.24 4.92 7.38
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Including 827.40 830.40 3.00 166 4.8 5.89 1.42 6.42 2.82
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Lower Vein 841.05 847.20 6.15 1,179 34.4 1.98 3.01 2.21 4.71
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Including 842.05 843.05 1.00 6,310 183.9 10.05 7.63 5.23 0.77
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(See longitudinal section attached and www.magsilver.com for diagrams).


To view the map accompanying this release please click on the following link: http://media3.marketwire.com/docs/mag716map.pdf

Drilling continues with four drills currently operating. MAG and Fresnillo operate the project at Juanicipio through their joint venture company, Minera Juanicipio S.A. DE C.V. MAG holds a 44% interest in the Juanicipio Joint Venture. In a press release dated June 18, 2008 (investors should refer to this press release for disclaimer information regarding resources) the joint venture announced a total inferred resource estimate of 237.8 million ounces of silver of which MAG's 44% interest equates to 104.5 million ounces and Fresnillo's 56% interest equates to 133.2 million ounces. In addition to the silver the estimate reports the inferred resource also contains a total of 480,000 ounces of gold and almost 1 billion pounds of combined lead and zinc (457,700 tonnes).

Quality Assurance and Control: The samples are shipped directly in security sealed bags to ALS-Chemex Laboratories preparation facility in Guadalajara, Jalisco, Mexico (Certification ISO 9001). Samples shipped also include intermittent standards and blanks. Pulp samples are subsequently shipped to ALS-Chemex Laboratories in North Vancouver, Canada for analysis. Two extra pulp samples are also prepared and are analyzed (in progress) by SGS Laboratories (Certification ISO 9001) and Inspectorate Laboratories (Certification ISO 9001) (or other recognized lab). The bulk reject is subsequently sent to CIDT (Center for Investigation and Technical Development) of Penoles in Torreon, Mexico for metallurgical testing where a fourth assay for each sample is analyzed and a calculated head grade is received on the basis of a concentrate balance. The CIDT also does a full microscopic, XRF and XRD mineralogical analysis.

Qualified Person: 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 Director and Shareholder of MAG and is a vendor of one project, other than Juanicipio, whereby he may receive additional shares. Dr. Megaw is satisfied that the results are verified based on an inspection of the core, a review of the sampling procedures, the credentials of the professionals completing the work and the visual nature of the silver and base metal sulphides within a district where he is familiar with the style and continuity of mineralization.

About the Joint Venture

The 8,000 hectare Juanicipio property is located in Zacatecas State, Mexico just outside the mining town of Fresnillo. The Fresnillo mine area has been in continuous production since the 1500's and today is host to the worlds' largest producing primary silver mine operated by Fresnillo plc Penoles. The Fresnillo/MAG Juanicipio Joint Venture lies 5 kilometres west from the principal production head-frame of the Fresnillo Mine and 1.5 kilometres west from the Saucito Vein, currently undergoing preproduction development with construction of a 600 metre shaft and a 2,200 metre decline. MAG and Fresnillo are now operating the delineation and exploration program through their joint venture company, Minera Juanicipio S.A. DE C.V.

About MAG Silver Corp. (www.magsilver.com)

MAG is focused on district scale projects located within the Mexican Silver Belt. Our mission is to become one of the premier companies in the Silver Mining Industry. MAG and its partner Fresnillo plc are delineating a significant new silver vein discovery on the Juanicipio Joint Venture in Zacatecas State, Mexico. MAG has also identified a new silver, lead and zinc discovery at its 100% owned Cinco de Mayo property. MAG is based in Vancouver, British Columbia, Canada. Its common shares trade on the TSX under the symbol MAG and on AMEX under the symbol MVG.

On behalf of the Board of MAG SILVER CORP.

Dan MacInnis, President and CEO

This release includes certain statements that may be deemed to be "forward-looking statements" within the meaning of the US Private Securities Litigation Reform Act of 1995. All statements in this release, other than statements of historical facts that address future mineral production, reserve potential, inferred resources in exploration drilling, exploitation activities and events or developments that MAG expects, are forward-looking statements. Forward-looking statements are often, but not always, identified by the use of words such as "seek", "anticipate", "plan", "continue", "estimate", "expect", "may", "will", "project", "predict", "potential", "targeting", "intend", "could", "might", "should", "believe" and similar expressions. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking statements. Although MAG believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in the forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements include changes in commodities prices, changes in mineral production performance, exploitation and exploration successes, continued availability of capital and financing, and general economic, market or business conditions.

Please Note: Investors are urged to consider closely the disclosures in MAG's annual and quarterly reports and other public filings, accessible through the Internet at www.sedar.com and www.sec.gov/edgar/searchedgar/companysearch.html.

Neither the TSX Exchange nor the American Stock Exchange has reviewed or accepted responsibility for the accuracy or adequacy of this news release, which has been prepared by management.

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