IMPACT Silver Corp.

IMPACT Silver Corp.

March 28, 2007 18:11 ET

IMPACT Silver Discovers High-Grade Gold Veins on Mamatla

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - March 28, 2007) - IMPACT Silver Corp. ("IMPACT") (TSX VENTURE:IPT) is pleased to announce results of the first assays received from preliminary reconnaissance work conducted on a small section in the northeast portion of its newly acquired 200 km2 Mamatla Project (see news release dated February 28, 2007). Mamatla is located immediately southwest of and adjacent to IMPACT's Royal Mines of Zacualpan silver project and production facilities in central Mexico. The reconnaissance program successfully traced epithermal silver and copper-gold veins from the southwest sector of the Royal Mines of Zacualpan project (see news release dated January 18, 2007) onto the northeastern part of the Mamatla district. In addition, several new epithermal vein prospects were found during the program. As is customary, the prospect names listed below are named after local landmarks and historical figures.


IMPACT crews found two old mine workings at the historic Huatecosco Prospect located about 10 km southwest of the Royal Mines of Zacualpan processing plant. Grab samples from the mine dump of the lower workings returned assays of 409 g/t silver, 5.41 g/t gold, 0.9% zinc and 0.5% lead. Crews were able to enter the upper inclined shaft which leads to a small underground working on the vein in oxidized material. Sampling of exposed oxidized material in the upper workings vein returned 1.88 g/t gold and 40 g/t silver over 8.7 m. The vein was also accessible in another area where samples returned highly variable assay results with grades up to 189 g/t gold over 1.5 m. IMPACT geologists believe that this is a wide vein containing variable, locally very high gold grades in the near surface oxidized zone and more consistent silver and gold rich grades at depth. IMPACT plans to reopen the lower workings and sample the vein at a lower level in preparation for future drilling.


The Sara Mamatla Prospect is located 2.5 km northeast of Huatecosco. A grab sample of vein material from the mine dump assayed 380 g/t silver, 1.14 g/t gold, 1.0% zinc and 1.9% lead. Plans are to reopen the old mine for crews to sample the vein in-situ.


The San Joaquin Prospect is located 2.5 km west of Huatecosco. A grab sample of vein material from the mine dump assayed 295 g/t silver and 1.5% zinc. Plans are to map and sample this area and if possible establish access to old mine workings.


A series of altered andesite dikes are exposed along a road 4 km west of Huatecosco. IMPACT crews sampled two of these dikes, which returned assays of 14.90 g/t gold across 0.5 m and 7.29 g/t gold across 0.6 m. Nearby there is a 20 m wide vein that returned low grade values on the roadcut, but may have potential for mineralization at depth. IMPACT plans to carry out a program of mapping, trenching and sampling in this area to better understand the mineralizing system and its potential.

IMPACT management is pleased that the initial reconnaissance of the northeastern part of the new Mamatla concession turned up so many prospects with significant assay results. All of the prospects described in this news release are new and in addition to those previously known and discussed in prior news releases.

George Gorzynski, P.Eng., a Qualified Person under the meaning of Canadian National Instrument 43-101 and Vice President, Exploration of IMPACT Silver Corp., is responsible for the technical content of this news release. Chip and channel samples were collected from cleaned rock faces in old mine workings and from bedrock outcrops over a continuous representative interval using a moil and hammer, bagged, sealed and then securely stored at the IMPACT base camp until shipment. A total of 5% assay standards and blanks were inserted into every sample shipment as a quality control measure. All samples were shipped to the ALS Chemex preparation laboratory in Guadalajara (Mexico) where they were fine crushed (70% passing a 2 mm screen), pulverized (85% passing a 75 micron screen) and a pulp split separated for assay by a riffle splitter. These pulps were shipped to the ALS Chemex laboratory in North Vancouver, Canada, where a 30-gram split of each was assayed for gold and silver by standard fire assay and a 10-gram split was analysed for an additional 30 elements by ICP spectrometry. Samples high in zinc or lead were then wet assayed to determine their values.

IMPACT Silver Corp. is a Tier 1 silver-focused mining and exploration company with two producing silver mines at Zacualpan, Mexico, just north of the Mamatla area; an advanced-stage silver project at Zacatecas, Mexico; and, other projects in the Dominican Republic. Energold Drilling Corp. (TSX VENTURE:EGD) owns 6.6 million shares of IMPACT.

On behalf of the Directors of IMPACT Silver Corp.

Frederick W. Davidson, President, CEO

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this news release.

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