Marifil Mines Ltd.
TSX VENTURE : MFM

Marifil Mines Ltd.

March 12, 2008 09:30 ET

Marifil's Las Aguilas East Nickel-Copper-Platinum-Palladium Deposit Continues to Expand

Values of Greater than 1 g/t Platinum in Five of Seven Holes Reported

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 12, 2008) - Marifil Mines Ltd. (TSX VENTURE:MFM) is pleased to announce assay results provided by its JV partner Castillian Resources from the final seven diamond drill holes completed in 2007 at the Las Aguilas East nickel-copper-platinum-palladium deposit, San Luis Province, Argentina (Figure 1). Five of these holes reported sample values exceeding 1.0 g/t platinum.

Drill hole LA07-063 intersected 7.00 metres grading 1.11% nickel, 0.45% copper, 0.04% cobalt, 0.50 g/t platinum and 0.68 g/t palladium and includes a 1 metre interval grading 2.01 g/t platinum and 0.27 g/t palladium. The deposit remains open for further expansion at this time (see Figures 2 and 3 - plan map and longitudinal section for locations). Results from the seven drill holes are summarized in Table 1 below.

The Las Aguilas East deposit has now been outlined for more than 200 metres along strike and to a 225 metre vertical depth. The mineralized zone shows a steep plunge to the south and remains open to the south and at depth (see Figure 3). Drill hole intercepts are spaced approximately 25 metres apart (Figure 2 - plan and Figure 3 - long section). A total of 67 holes were completed on the Las Aguilas East and West deposits in 2007 totalling 11,028 metres. Of these, 31 holes were drilled at the Las Aguilas East deposit totalling 5,817 metres.

A preliminary resource estimate is in progress; however, because the deposits remain open a complete resource estimate can not be completed until after the resource delineation is completed and the limits of the deposits have been established. Drilling will resume on the extensions of the West and East deposits as well as a number of regional targets in mid March.

The project is an option joint venture whereby Castillian may earn up to a 65 percent interest in the property from Marifil (see press release dated March 5, 2007).



Table 1: Mineralized intersections for remaining 2007 drill holes,
Las Aguilas East deposit.

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Est. SUM
Core True NI Cu Co Pt Pd Au PGE
Hole # To Length Width % % % g/t g/t g/t g/t

CT-LA07-045 164.00 2.90 2.50 0.57 0.19 0.03 0.08 0.32 0.02 0.42
209.56 2.10 2.00 0.80 0.34 0.04 0.06 0.31 0.06 0.42
242.67 6.01 5.20 0.33 0.17 0.03 0.16 0.08 0.02 0.27

CT-LA07-050 207.37 19.66 17.10 0.49 0.39 0.02 0.51 0.42 0.15 1.08
includes 202.10 3.70 3.10 0.65 0.49 0.03 0.79 0.50 0.29 1.58
199.82 1.42 0.64 0.39 0.03 1.50 0.58 0.13 2.21
219.37 5.72 4.65 0.60 0.35 0.03 0.08 0.31 0.02 0.41
includes 214.16 0.51 0.3 0.16 0.02 1.03 0.21 0.02 1.27
240.36 4.68 4.00 0.38 0.26 0.02 0.51 0.57 0.22 1.30

CT-LA07-057 196.00 3.25 3.00 0.62 0.67 0.04 0.39 0.18 0.05 0.62
includes 196.00 0.80 0.51 0.74 0.05 1.52 0.21 0.07 1.80

CT-LA07-059 257.69 1.74 1.50 0.79 1.76 0.08 0.02 2.56 0.03 2.61

CT-LA07-062 202.80 8.20 7.00 0.93 0.42 0.03 0.41 0.59 0.09 1.09
includes 201.25 5.65 4.75 1.11 0.45 0.04 0.50 0.68 0.09 1.27
197.60 1.00 1.24 0.49 0.04 1.58 0.60 0.08 2.26
219.45 4.55 3.80 0.56 0.42 0.02 0.32 0.51 0.12 0.95

CT-LA07-063 32.80 13.45 12.00 0.56 0.29 0.03 0.14 0.14 0.03 0.31
61.75 19.30 18.50 0.92 0.69 0.06 0.19 0.23 0.11 0.52
includes 53.10 7.00 6.10 1.13 0.68 0.07 0.31 0.27 0.11 0.68
48.10 1.00 1.08 0.79 0.07 2.01 0.27 0.15 2.42
77.40 8.40 7.50 0.70 0.50 0.04 0.22 0.18 0.06 0.46

CT-LA07-066 251.70 18.00 16.00 Disseminated sulphides less than 0.3% Ni
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Quality Control

The company employs a diligent QA/QC protocol on all aspects of the analytical procedures. Core samples are sawn and then one half of the NQ core is restored to the core box for future reference and one half of the core is sent for analysis. Samples are taken in approx. 1.0-metre intervals or less when in the mineralized zone, and at 1.5 metres or less when in disseminated sulphides (less than 2 percent sulphides). Sample preparation is completed at the ALS-Chemex lab preparation lab in Mendoza, Argentina and assayed at ALS-Chemex lab in Vancouver, Canada, using multi-acid digest/ICP-AES for the base metals and A.A. when nickel and copper are over the detection limits. Platinum, palladium and gold values are determined by 30 gram fire assay with ICP-AES finish. A blank sample is inserted every 40th sample and standard samples representing a range of grades are inserted at intervals of 1 in 20 to 30 samples.

The quality control and all aspects of the exploration program are supervised by Castillian exploration manager, Danielle Giovenazzo, Ph.D., PGeo, who meets the criteria for a qualified person as defined under National Instrument 43-101.

John Hite, PGeol, President and Chief Executive Officer of Marifil and David Gower, PGeo, President and Chief Executive Officer of Castillian, both of whom are qualified persons as defined by NI 43-101, have reviewed this release.

About Marifil Mines Ltd.

Marifil Mines Ltd. is a Canadian mineral exploration company listed on the TSX Venture Exchange under the symbol "MFM" with approximately 31.8 million shares issued and outstanding. Marifil operates under a Joint Venture Model whereby the company acquires properties, adds value by geologic mapping, trenching, geophysics, and/or drilling and then seeks qualified partners to earn their interest by advancing the property to production. Castillian is earning an interest in the Las Aguilas Nickel-Copper-PGM Project in Argentina from Marifil Mines Ltd.

About Castillan Resources

Castillian Resources Corp. is a Canadian mineral exploration company listed on the TSX Venture Exchange under the symbol "CT" with approximately 87.8 million shares issued and outstanding. The company is earning an interest in the Las Aguilas Nickel-Copper-PGM Project in Argentina from Marifil Mines Ltd. and has the right to purchase a 100 percent interest in the Kagera Project which comprises over 1,600 square kilometres in the highly mineralized Kabanga Nickel Belt in Tanzania and rights to acquire 90 percent of the Pederson deposit, an advanced gold exploration project in Bolivia which is currently under force majeure.

Forward Looking Statements

This document may contain or refer to forward looking information based on current expectations, including, but not limited to, mineralization projections and similarities drawn to other deposits, estimates regarding the timing for resource modeling, future drill programs and the preparation of a 43-101 compliant technical report. Forward-looking statements are subject to significant risks and uncertainties, and other factors that could cause actual results to differ materially from expected results. These forward-looking statements are made as of the date hereof and we assume no responsibility to update or revise them to reflect new events or circumstances.

To view Figures 1, 2 and 3 please click on the following link: http://media3.marketwire.com/docs/MFM0312.pdf

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

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