IMPACT Silver Corp.
TSX VENTURE : IPT

IMPACT Silver Corp.

December 04, 2007 17:33 ET

Impact Silver Announces New Silver Discoveries at Mamatla

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Dec. 4, 2007) - IMPACT Silver Corp. (TSX VENTURE:IPT) ("IMPACT") is pleased to announce the discovery of several new silver prospects in the Mamatla District. The wholly-owned 200 square-kilometer Mamatla District is located southwest of and immediately adjacent to the Royal Mines of Zacualpan. Mamatla is host to both epithermal veins and volcanogenic massive sulphide deposits. Field work has demonstrated that some of the veins exploited within the Royal Mines of Zacualpan project extend onto the eastern portion of the Mamatla District. Most of the prospects described below are within trucking distance from the operating mill at Zacualpan.

Field crews began prospecting and sampling at Mamatla immediately after IMPACT won the project in a government auction earlier this year. Much like at Zacualpan, the majority of the targets have historical workings that stopped due to groundwater. These targets will be advanced towards drilling in 2008.

SAN CARLOS AREA PROSPECTS

The ruins of the large historic San Carlos processing plant are located 13 kilometers southwest of IMPACT's operating Zacualpan processing plant. The San Carlos plant appears to have served as a central facility for processing minerals from local mines. At the site, IMPACT crews found seven piles of mineralized rocks varying from 20 - 500 tonnes in size. Samples from these rock piles assayed between 0.06 - 2.12% copper, 0.1 - 17.55% zinc, 0.1 - 11.45% lead, 46 - 836g/t silver and 0.2 - 8.65g/t gold. With the belief that these piles represent mineral collected from various nearby old mines, IMPACT crews began prospecting the surrounding countryside and discovered numerous old mine workings. Samples from some of the first workings discovered are reported below.

PIRUL PROSPECT

The Pirul Prospect is comprised of old mine shafts and adits located 1 kilometer north of the San Carlos plant. Samples from the workings returned the following values:



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PIRUL PROSPECT
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SAMPLE
LOCATION WIDTH (m) SILVER (g/t) ZINC (%) LEAD (%)
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Sample from shaft 2.0 331 0.04 9.23
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Samples from adit located 65m southeast of shaft
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5m from entrance 1.7 304 0.36 4.96
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12m from entrance 1.0 285 5.31 6.88
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GORRION PROSPECT

The Gorrion Prospect is located 500m west of the Pirul Prospect. Samples from a dump beside a surface cut and a nearby outcrop returned the following values:



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GORRION PROSPECT
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ESTIMATED
LOCATION TRUE WIDTH (m) SILVER (g/t)
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Mine dump - 311
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Surface sample of vein 2.1 163
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ANGEL PROSPECT

The Angel Prospect is located 3 kilometers northwest of the San Carlos plant. Highlights from a series of old shafts and small surface open cuts traced over 100m returned the following values:



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ANGEL PROSPECT
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ESTIMATED
LOCATION TRUE WIDTH (m) SILVER (g/t)
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Random samples from - 481
2000T old mine dump
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Average of 3 samples 0.9 331
beside Shaft No. 1
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Sample from Shaft No. 2 0.9 492
(30mNW of Shaft No. 1)
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SAN NICOLAS DEL COBRE PROSPECTS

The San Nicolas del Cobre Prospects are found over a distance of 1 kilometer in the far northwest of the Mamatla District. Samples taken from old mine workings in the area returned the following values:



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SAN NICOLAS DEL COBRE PROSPECTS
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ESTIMATED
TRUE
LOCATION WIDTH (m) COPPER (%) SILVER (g/t) GOLD (g/t)
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Average of 5 samples 0.4 2.03 257 0.2
in Cobriza Shaft
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Including 0.6 5.82 401 0.2
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Amigo Shaft 1.0 1.67 123 0.5
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Enjambre Shaft 0.5 1.85 98 4.1
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Enjambre mine dump - 2.60 287 2.0
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IMPACT continues to conduct surface and underground mapping and sampling in the Mamatla District. Based on encouraging results from this initial field work, a drill program is being planned for this area in 2008. Meanwhile, surface and underground drilling continue unabated at Royal Mines of Zacualpan.

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 over a continuous representative interval using a chisel and hammer. 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 2mm screen), pulverized (85% passing a 75 micron screen) and 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 analyzed for an additional 30 elements by ICP spectrometry.

IMPACT Silver Corp. is a silver-focused mining and exploration company with a producing silver operation at Zacualpan, Mexico; a district scale exploration program at Mamatla, Mexico; an advanced project with a producing mill at Zacatecas, Mexico; and other projects in the Dominican Republic. Energold Drilling Corp. (EGD:TSX.V) 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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