VANCOUVER, BRITISH COLUMBIA — (MARKET WIRE) — 10/12/11 — (All figures are in United States dollars unless otherwise stated) –

Minefinders Corporation Ltd. (“Minefinders” or “the Company”) (TSX: MFL)(NYSE Amex: MFN) is today reporting its production and sales results for the quarter ended September 30, 2011. Full financial and operating results for the quarter will be released after market close on Monday, November 7, 2011.

  Third Quarter 2011 Production and Sales Results  —————————————————————————-                                 Three months ended         Nine months ended                                       September 30              September 30 —————————————————————————-                                  2011         2010         2011         2010 —————————————————————————- Gold ounces produced           16,278        7,447       53,661       40,008 —————————————————————————- Silver ounces produced        692,121      184,887    2,653,620      707,120 —————————————————————————-  —————————————————————————- Gold ounces sold               15,945        8,070       53,708       41,827 —————————————————————————- Silver ounces sold            693,532      202,800    2,665,024      729,597 —————————————————————————- Gold-equivalent ounces  sold(1)                       32,222       11,170      118,498       53,076 —————————————————————————-  —————————————————————————- Sales proceeds  (millions)               $      53.8  $      13.6  $     179.2  $      61.6 —————————————————————————-  (1) Gold-equivalent ounces sold includes gold ounces sold and silver ounces sold converted to a gold-equivalent based on the ratio of actual realized gold price to actual realized silver price. Gold-equivalent ounces sold in the third quarter and nine-month period of 2011 were estimated using a 43 to one silver to gold ratio and a 41 to one silver to gold ratio, respectively (2010 – 65 to one ratio and 64 to one ratio, respectively).  

For the nine months ended September 30, 2011 Minefinders sold 53,708 ounces of gold and 2,665,024 ounces of silver or 118,498 gold-equivalent ounces. The Company is on track to meet its production guidance for 2011 of 65,000 to 70,000 ounces of gold and 3.3 to 3.5 million ounces of silver.

Production in the third quarter was lower than planned due to a reduction in cyanide concentration going onto the leach pad and timing of placing ore under irrigation. As a result of the Company’s primary supplier of cyanide declaring force majeure at the end of June 2011 it became necessary to conserve cyanide supplies. Cyanide concentrations going to the pad were reduced with the resultant slower recovery of gold and particularly silver. Supplies have now returned to normal levels as has the concentration level of cyanide being applied to the leach pad and the levels of gold and silver in solution.

In addition, the west side of the phase 2 leach pad suffered a crushed collection pipe that prevented collection of solution in one of two collection pipes. In order to maintain the bulk of production, the east side of the pad was prepared for stacking, though metal production was reduced during the changeover while new patios were prepared for irrigation. This work is now complete and the area under irrigation has been expanded. The Company expects production to improve in the fourth quarter. Repair work on the collapsed pipe is expected to be completed during the course of the next month.

The calculation of operating and total cash costs for the third quarter 2011 has not yet been completed. This information will be included with the results to be released on November 7.

Timing for Release of Third Quarter 2011 Financial and Operating Results

After market close on Monday, November 7, 2011 Minefinders will release its third quarter 2011 financial and operating results. An investor conference call will be held on Tuesday, November 8, 2011 at 8 a.m. Pacific Time (11 a.m. Eastern Time) to discuss the results. Participants may join the call by dialing 1-877-240-9772 toll-free or 1-416-340-9432 for calls outside Canada and the U.S. Simultaneously, an audio webcast of the conference call will be available on the home page of the Company’s website, www.minefinders.com.

An audio replay will be available until November 15, 2011 by calling 1-800-408-3053 toll-free or 1-905-694-9451 for calls outside Canada and the U.S. and entering pass code 7573714.

About Minefinders

Minefinders is a precious metals mining and exploration company and operates the multi-million ounce Dolores gold and silver mine in Mexico. For more information, please visit our website at www.minefinders.com.

Forward Looking Statements

This release contains certain “forward-looking statements” and “forward-looking information” as defined under applicable Canadian and U.S. securities laws. Forward-looking statements generally can be identified by the use of forward-looking terminology such as “may”, “will”, “expect”, “intend”, “estimate”, “anticipate”, “believe”, “continue” or similar terminology. Forward-looking statements are based on forecasts of future results, estimates of amounts not yet determinable and assumptions that, while believed by management to be reasonable, are inherently subject to significant business, economic and competitive uncertainties and contingencies. Certain of the statements made herein by Minefinders are forward-looking and subject to important risk factors and uncertainties, both known and unknown, many of which are beyond the Company’s ability to control or predict. Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking statements. Those factors are described or referred to under the heading “Risk Factors” in Minefinders’ Annual Information Form for the year ended December 31, 2010 and under the heading “Risks and Uncertainties” in Minefinders’ Management’s Discussion and Analysis for the quarter ended June 30, 2011, both of which are incorporated by reference herein and are available on SEDAR at www.sedar.com. Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. Minefinders does not undertake to update any forward looking statements that are incorporated by reference, except in accordance with applicable securities laws.

Contacts: Minefinders Corporation Ltd. Jonathan Hackshaw Director of Corporate Communications Toll Free: (866) 687-6263  Minefinders Corporation Ltd. Mike Wills Investors Relations Representative Toll Free: (866) 687-6263 www.minefinders.com