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MAG Silver Reports Multiple Silver/Lead/Zinc Intercepts in “Bridge Zone“ and Expands Cinco de Mayo Drill Program

17.05.2012  |  Marketwired
CM12-411: 314 g/t (9.2 opt) silver with 1.6 g/t gold, 7.6% lead and 14.0% zinc over 4.35 metres

CM12-405: 2,367 g/t (69 opt) silver with 61.7% lead and 0.2% zinc over 1.71 metres

CM12-397: 157 g/t (4.6 opt) silver with 0.8 g/t gold, 4.7% lead and 10.6% zinc over 5.87 metres

CM12-399: 150 g/t (4.4 opt) silver with 2.2 g/t gold, 3.3% lead and 17.0% zinc over 3.36 metres



VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 05/17/12 -- MAG Silver Corp. (TSX: MAG)(NYSE Amex: MVG) ("MAG") announces that on-going drilling at its 100%-owned Cinco de Mayo ("Cinco") property in northern Chihuahua State, Mexico continues to successfully demonstrate lateral and vertical continuity of massive sulphide mineralization in the "Bridge Zone" along the Jose Manto-Cinco Ridge corridor. In response, MAG has increased its 2012 planned drilling by two million dollars to $5.5M dollars, and drilling has been ramped up from one to four rigs with a fifth expected in the near future. Three rigs are now drilling systematic step out holes to follow up on the strong results reported here and previously reported from Section 380 (see press release dated November 28, 2011). One exploration rig is dedicated to finding the source of the system.


Delineation Drilling Details

The step-out drilling is progressing methodically on 50 metre centres above and below the discovery holes on sections 250 metres apart. Fifteen holes have been drilled, twelve of which have intercepted significant massive sulphides on the four active drilling sections (see Figure 1: http://media3.marketwire.com/docs/MAGFig_1.pdf). Notably, drilling has now traced sulphides to within 125 metres of the surface (Hole 405). The best hole is Hole 411, one of the first three holes for which we have results on the 381 Section which lies 500 metres northwest of Section 380. CM12-411 cut 314 grams per tonne ("g/t") (9.2 ounces per ton ("opt")) silver with 1.6 g/t gold, 7.6% lead and 14.0% zinc over 4.35 metres; and 2.05 metres that grades 498 g/t (14.5 opt) silver with 11.3% lead and 13.6% zinc. All holes reported were drilled at -70 degrees inclination and intercepts appear to be close to true width (see Figure 2: http://media3.marketwire.com/docs/MAGFig_2.pdf). Sections 380 and 377 appear complete but the body remains open along strike in both directions.

"These results show significant massive sulphides occurring in each section drilled to date along 1,000 metres of the 4,000 metre long Jose Manto-Bridge-Cinco Ridge corridor, allowing us to get more aggressive with drilling out a robust high-grade resource," said Dan MacInnis, President and CEO of MAG Silver. "At the same time, the aggregate thickness and distinctive features of the two recent deep holes also indicates that we may be approaching one of the principal mineralization centres in the district."

Five exploration holes have been drilled recently to locate the system source. Two holes (392 and 399) were drilled deep across the overlap area between the Jose Manto and the Bridge Zone (see Figure 3, Longitudinal Section: http://media3.marketwire.com/docs/MAGFig_3.pdf). Both holes cut multiple high-grade zones of massive sulphides ranging from 0.5 to 3.3 metres wide with distinctive mineralogy and alteration (see Table 1). The best individual deep intercept was in Hole 399 which cut 3.36 metres grading 150 g/t (4.4 opt) silver; 2.2 g/t gold; 3.3% lead, and 17.0% zinc starting at 675.29 metres down-hole. Drilling is underway to trace these deep high-grade zones in all directions, including upwards into the known manto zone. The deep hole results from the Bridge Zone indicate that the source of the combined Jose Manto and Bridge Zones may lie at depth between Section 371 and Hole 392 (see Figure 3; Longitudinal Section).

Three additional exploration holes (Holes 404, 407 and 410) were drilled off the northwest end of the Jose Manto to try to extend the mineralization. All three hit narrow massive sulphide zones.


Delineation Drilling Discussion

This series of fifteen step-out holes includes the second complete cross-section across the "Bridge Zone" (Section 377), a partial cross-section on Section 371 and the first follow-up hole on Section 381. Overall, twelve of the holes on these sections cut massive sulphides ranging from 0.67 to 4.78 metres in thickness.

Hole 409 shows numerous massive sulfide zones, ranging from 0.85 to 4.78 metres in thickness, combining to give 1.1% zinc over an 88.59 metre length (see Table1). Metals content also varies significantly between and within intercepts; the most silver rich intercept was in Hole 405, which cut 1.71 metres grading 2,367 g/t silver (69 opt), 0.01 g/t gold, 61.7% lead and 0.2% zinc In contrast, 28 metres deeper in the same hole a 1.86 metre massive sulphide manto graded 16.6% zinc with 43 g/t silver and 1.6% lead.

Bridge Zone mineralization corresponds well with the style and nature of the mineralization at Jose Manto. If continuity continues to be confirmed, this will make a manto-style body at least 4,000 metres long, 350 meters down dip and averaging 3.5 to 4.0 metres thick.


Table 1: Assay Results Jose Manto - Cinco Ridge Mineralized Corridor (True
widths 90% to 100% of core lengths)

                    From       To Interval    Au     Ag     Pb     Zn  Pb+Zn
Hole ID (metres) (metres) (metres) (g/t) (g/t) (%) (%) (%)
----------------------------------------------------------------------------
Section 371
----------------------------------------------------------------------------
CM12-406 250.47 251.93 1.46 0.17 268 8.54 19.57 28.12
----------------------------------------------------------------------------
including 250.47 251.26 0.79 0.14 483 15.50 35.93 51.43
----------------------------------------------------------------------------
and 270.66 272.93 2.27 0.06 86 2.04 2.10 4.14
----------------------------------------------------------------------------
CM12-409 100.39 101.12 0.73 0.13 128.0 0.32 0.23 0.55
----------------------------------------------------------------------------
and 106.97 195.58 88.61 0.04 22.8 0.36 1.11 1.47
----------------------------------------------------------------------------
including 112.87 117.30 4.43 0.17 50.6 1.67 4.11 5.78
----------------------------------------------------------------------------
including 115.66 116.51 0.85 0.55 173.9 4.85 13.34 18.19
----------------------------------------------------------------------------
including 135.27 136.45 1.18 0.11 121.4 2.53 7.97 10.49
----------------------------------------------------------------------------
including 173.18 195.58 22.40 0.06 51.9 0.60 1.86 2.46
----------------------------------------------------------------------------
including 179.57 181.50 1.93 0.19 72.9 0.19 0.62 0.81
----------------------------------------------------------------------------
including 190.80 195.58 4.78 0.05 94.4 1.99 2.76 4.76
----------------------------------------------------------------------------
including 191.15 192.87 1.72 0.02 224.4 4.73 1.27 6.00
----------------------------------------------------------------------------
including 192.10 192.35 0.25 0.03 1435.0 29.18 0.73 29.91
----------------------------------------------------------------------------
CM12-411 163.54 164.34 0.80 0.30 1260.0 32.68 14.05 46.73
----------------------------------------------------------------------------
and 197.08 197.74 0.66 0.11 274.0 3.17 9.45 12.62
----------------------------------------------------------------------------
and 230.13 230.45 0.32 0.15 726.0 1.73 6.03 7.76
----------------------------------------------------------------------------
and 238.05 243.90 5.85 0.02 236.0 5.14 9.70 14.83
----------------------------------------------------------------------------
including 239.05 243.90 4.85 0.02 276.8 6.08 10.50 16.58
----------------------------------------------------------------------------
including 241.85 243.90 2.05 0.04 497.6 11.26 13.61 24.87
----------------------------------------------------------------------------
and(1) 253.50 257.85 4.35 1.57 314.2 7.55 14.05 21.59
----------------------------------------------------------------------------
Section 377
----------------------------------------------------------------------------
CM12-397 223.65 226.05 2.40 0.12 196 1.26 2.65 3.91
----------------------------------------------------------------------------
and 244.93 250.80 5.87 0.76 157 4.73 10.57 15.30
----------------------------------------------------------------------------
including 247.74 248.45 0.71 0.30 395 6.87 12.15 19.02
----------------------------------------------------------------------------
including 249.34 250.80 1.46 2.22 192 7.43 18.60 26.03
----------------------------------------------------------------------------
and 278.79 279.62 0.83 0.53 339 10.80 23.73 34.53
----------------------------------------------------------------------------
CM12-398 108.50 110.70 2.20 0.52 64 1.29 0.16 1.45
----------------------------------------------------------------------------
including 109.50 110.20 0.70 1.22 181 2.89 0.31 3.20
----------------------------------------------------------------------------
and 154.30 155.42 1.12 0.03 47 1.62 1.88 3.50
----------------------------------------------------------------------------
and 187.60 189.15 1.55 0.04 15 0.32 0.61 0.93
----------------------------------------------------------------------------
and 203.85 204.14 0.25 0.10 59 3.52 2.55 6.07
----------------------------------------------------------------------------
CM12-400 334.73 335.32 0.59 0.48 41 2.22 3.74 5.96
----------------------------------------------------------------------------
and 446.55 448.58 2.03 0.50 123 3.60 2.95 6.54
----------------------------------------------------------------------------
CM12-401 180.05 180.72 0.67 0.03 40 0.09 13.26 13.35
----------------------------------------------------------------------------
and 282.95 285.70 2.75 0.04 80 2.34 8.83 11.17
----------------------------------------------------------------------------
including 282.95 283.91 0.96 0.05 131 1.29 19.75 21.04
----------------------------------------------------------------------------
CM12-402 NSR
----------------------------------------------------------------------------
CM12-403 409.25 416.35 7.10 0.33 127 3.26 2.71 5.97
----------------------------------------------------------------------------
including 409.25 412.88 3.63 0.36 202 4.75 2.76 7.51
----------------------------------------------------------------------------
including 409.25 410.17 0.92 0.27 320 11.03 2.50 13.53
----------------------------------------------------------------------------
including 411.48 412.20 0.72 0.42 451 5.41 1.08 6.49
----------------------------------------------------------------------------
CM12-405 129.68 131.39 1.71 0.01 2367 61.74 0.21 61.95
----------------------------------------------------------------------------
and 142.23 146.60 4.37 0.02 56 0.09 7.03 7.12
----------------------------------------------------------------------------
including 145.65 146.60 0.95 0.05 210 0.01 0.08 0.09
----------------------------------------------------------------------------
and 158.43 160.29 1.86 0.01 43 1.57 16.56 18.12
----------------------------------------------------------------------------
Section 380(2)
----------------------------------------------------------------------------
CM12-393 493.42 496.49 3.07 0.53 13 0.36 8.94 9.30
----------------------------------------------------------------------------
CM12-394 219.69 220.36 0.67 0.76 318 15.17 17.40 32.57
----------------------------------------------------------------------------
CM12-395 Hole Lost Before Target Reached (NSR)
----------------------------------------------------------------------------
CM12-396 NSR
----------------------------------------------------------------------------
Section 381
----------------------------------------------------------------------------
CM12-408 232.70 238.27 5.57 0.20 264.6 5.59 0.67 6.26
----------------------------------------------------------------------------
including 232.70 232.90 0.20 0.23 1335.0 26.50 2.30 28.80
----------------------------------------------------------------------------
including 235.62 238.27 2.65 0.38 447.8 9.51 0.89 10.40
----------------------------------------------------------------------------
including 237.26 238.27 1.01 0.46 1075.0 21.40 0.70 22.10
----------------------------------------------------------------------------
Deep Exploration Targets
----------------------------------------------------------------------------
JM12-392 395.68 409.94 14.26 0.03 63 0.35 0.16 0.51
----------------------------------------------------------------------------
including 395.68 396.74 1.06 0.32 669 3.55 0.59 4.14
----------------------------------------------------------------------------
and 548.64 549.59 0.95 1.35 327 2.38 4.74 7.12
----------------------------------------------------------------------------
and 585.36 586.85 1.49 0.94 62 1.03 0.62 1.65
----------------------------------------------------------------------------
and 648.37 655.67 7.30 1.23 138 1.45 1.50 2.95
----------------------------------------------------------------------------
including 654.15 655.67 1.52 4.00 445 5.72 5.39 11.11
----------------------------------------------------------------------------
and 789.86 790.34 0.48 1.00 92 3.10 1.72 4.82
----------------------------------------------------------------------------
CM12-399 595.34 596.54 1.20 0.24 66 1.85 2.92 4.77
----------------------------------------------------------------------------
and 611.40 613.37 1.97 0.43 143 4.12 6.00 10.12
----------------------------------------------------------------------------
and 636.12 638.76 2.64 0.04 150 1.14 19.99 21.13
----------------------------------------------------------------------------
including 636.67 637.35 0.68 0.05 419 3.61 36.39 40.00
----------------------------------------------------------------------------
and 675.21 678.57 3.36 2.22 150 3.32 16.99 20.31
----------------------------------------------------------------------------
Jose Manto NW Extension Targets
----------------------------------------------------------------------------
JM12-404 477.66 477.92 0.26 0.04 112 2.61 8.74 11.35
----------------------------------------------------------------------------
JM12-407 382.23 382.50 0.27 0.02 191 4.71 2.03 6.74
----------------------------------------------------------------------------
JM12-410 Awaiting Assays
----------------------------------------------------------------------------
(1) denotes the composite includes a Zn overlimit (greater than 30%)
----------------------------------------------------------------------------
(2) See Press Release of 3/26/12 for principal intercepts on this section
----------------------------------------------------------------------------
True widths 90% to 100% of core lengths
----------------------------------------------------------------------------


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 remaining technical information in this release. Dr. Megaw has a Ph.D. in geology and more than 20 years of relevant experience focused 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 the vendor of this project, which is subject to a NSR. 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.


Quality Assurance and Control:

The Company has in place a quality control program to ensure best practices in sampling and analysis. Samples were collected by employees of consulting firm Minera Cascabel S.A. de C.V. on behalf of MAG Silver Corp. The diamond drill core samples are shipped directly in security sealed bags to ALS-Chemex Laboratories preparation facilities in Hermosillo, Sonora or Chihuahua City (Certification ISO 9001). Sample pulps are shipped from there to ALS-Chemex Laboratories in North Vancouver, Canada for analysis. All samples were assayed for gold by standard fire assay-ICP finish with a 50 gram charge. Gold values in excess of 3.00 g/t were re-analyzed by fire assay with gravimetric finish for greater accuracy. Silver, zinc, copper and lead values in excess of 100 ppm, 1%, 1% and 1% respectively are also repeated by fire assay.


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 is conducting ongoing exploration of its portfolio of 100% owned properties in Mexico including a silver, lead and zinc discovery and a moly-gold discovery at its 100% owned Cinco de Mayo property in Chihuahua State. MAG and Fresnillo plc are also jointly developing the Valdecanas Deposit on the Juanicipio Joint Venture in Zacatecas State. MAG is based in Vancouver, British Columbia, Canada. Its common shares trade on the TSX under the symbol MAG and on the NYSE MKT under the symbol MVG.


On behalf of the Board of MAG SILVER CORP.

Dan MacInnis
CEO & Director



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 are forward looking statements including statements, including statements that address future mineral production, reserve potential, exploration drilling, exploitation activities and events or developments. 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, but are not limited to, 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, political risk, currency risk and capital cost inflation. In addition, forward-looking statements are subject to various risks, including that data is incomplete and considerable additional work will be required to complete further evaluation, including but not limited to drilling, engineering and socio-economic studies and investment. The reader is referred to the Company's filings with the SEC and Canadian securities regulators for disclosure regarding these and other risk factors. There is no certainty that any forward looking statement will come to pass and investors should not place undue reliance upon forward-looking statements.

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 Toronto Stock Exchange nor the NYSE MKT has reviewed or accepted responsibility for the accuracy or adequacy of this news release, which has been prepared by management.




Contacts:

MAG Silver Corp.
Gordon Neal, VP Corp. Development
604) 630-1399 or Toll Free: (866) 630-1399
(604) 681-0894 (FAX)
info@magsilver.com
www.magsilver.com
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