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Drill results are promising at Minefinders’ Real Viejo Project

Friday, December 7th, 2007

Minefinders Corporation Ltd. reports that final assays have been received from the 2007 drill program completed on its 100% owned Real Viejo prospect, located in northern Sonora, Mexico. The program encountered highly encouraging silver and base metal mineralization, expanded the known resource within the project area, and significantly increased the overall potential of the project.
The 2007 drill program at Real Viejo consisted of six reverse-circulation drill holes totaling 577.6 metres, directed at testing a new area of concealed mineralization, located more than 100 metres south of the main historical workings at Real Viejo. The three easternmost drill holes encountered shallow, widespread mineralization, including 15.2 metres of 232.9 grams per tonne (g/t) silver (50 feet of 6.79 ounces per ton (oz/t) silver) with 1.01% lead and 0.40% zinc, 35.1 metres of 63.2 g/t silver (115 feet of 1.84 oz/t silver) with 1.75% lead and 0.83% zinc, and 42.7 metres of 69.7 g/t silver (140 feet of 2.03 oz/t silver) with 0.43% lead and 0.27% zinc. Highest grade intervals were central to the wider intercepts and included 333.5 g/t silver over 3.05 metres (9.73 oz/t over 10 feet) with 6.3% lead and 2.54% zinc, and 1,060 g/t silver over 1.52 metres (30.9 oz/t over 5 feet) with 4.7% lead and 0.57% zinc.
The 2007 program was designed to follow up on a mineralized intercept encountered in stepout hole RV-05-16C completed during the 2005 drill program at Real Viejo. This hole intercepted 26.7 metres of concealed mineralization that averaged 71.8 g/t silver from 14.3 metres to 41.0 metres of depth (2.09 oz/t silver over 87.6 feet), as reported in Minefinders news release dated February 8, 2006. Drill tests in 2007 were spread over 350 metres in an east-west line along the southern extent of the arroyo that separates the northern workings from the rest of the project (see plan map on the Company’s website). The strongest mineralization was found beneath altered tuffs containing low-temperature stockworks exhibiting only moderately elevated lead and zinc geochemistry with minor silver. This alteration style, with anomalous base-metal geochemistry, extends over a wide area south of the arroyo.
The 2007 drill program at Real Viejo was part of a larger drill program on the Company’s northern Sonora properties. In order to consolidate potential silver and gold targets, the Company has staked and received title to more than 28,000 hectares (108 square miles) of mineral rights within this highly-prospective region of Mexico. Drilling has continued and is ongoing at the Company’s Planchas de Plata silver project located approximately ten kilometres to the southeast of Real Viejo. Drill results from this property are still outstanding and will be reported as available in a separate news release.
Assay summary results from the Real Viejo program:
Summary Assay Results – 2007 Real Viejo Drill Program
Drill hole, Inclination, From(m), To(m), Width(m), Width(ft), Silver(g/t),
Silver(oz/t), Pb%, Zn%, CombinedPb+Zn%
RV05-16C* -45 14.3 41.0 26.7 88 71.08 2.09 0.48 0.47 0.95
RV07-22 -43 15.2 18.3 3.1 10 25.6 0.75 0.24 0.33 0.57
RV07-23 -45 0 9.1 9.1 30 60.1 1.75 0.39 0.47 0.86
including 4.6 6.1 1.5 5 152.0 4.43 0.27 0.64 0.91
RV07-24 -47 3.1 7.6 4.6 15 29.0 0.85 0.11 0.18 0.29
RV07-25 -43 19.8 62.5 42.7 140 69.7 2.03 0.43 0.27 0.70
including 39.6 41.2 1.6 5 168.0 4.90 1.39 0.20 1.59
including 53.3 56.4 3.1 10 197.0 5.75 0.45 0.24 0.69
and 77.7 93.0** 15.2 50 20.6 0.60 1.36 .75 2.11
including 77.7 80.8 3.1 10 71.1 5.27 5.27 .95 6.22
RV07-26 -54 39.6 74.7 35.1 115 63.2 1.84 1.75 0.83 2.58
including 39.6 56.4 16.8 55 100.2 2.92 2.54 0.75 3.29
including 51.8 54.9 3.1 10 333.5 9.73 6.28 2.54 8.82
including 64.0 70.1 6.1 20 54.4 1.59 1.8 1.65 3.45
RV07-27 -44 50.3 65.5 15.2 50 232.9 6.79 1.01 0.40 1.41
including 53.3 62.5 9.1 30 337.4 9.84 1.44 0.53 1.97
including 53.3 54.9 1.5 5 1060.0 30.92 4.69 0.57 5.26
* drill intercept cored during previous program ** bottom of hole
The 2007 drill program successfully extended the project’s mineralized potential over 300 metres of strike length beneath a covered target area. Whereas previous surface sampling suggested the presence of lead and zinc in altered and stockwork veined rocks south of the arroyo, little silver was indicated in outcrop. The widespread shallow zones of silver and base metals encountered in drilling suggest potential for bulk mining. Alternatively, the high grade silver/base-metal intercepts central to these wider zones appear to be of sufficient grade and thicknesses to support underground mining, provided that a reasonable amount of continuity can be demonstrated with additional deep drilling.
Additional drill testing is planned for early 2008, to further define the geometry, down-dip and lateral continuity, and grades of the concealed mineralization. The higher concentrations of silver and base metals and intensity of alteration suggest the system may be strengthening to the south. The Company has begun to plan additional drill roads and will file permits by year end to continue exploration and advancement of the property through 2008.
For further information visit: www.minefinders.com

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