VANCOUVER, BRITISH COLUMBIA — (MARKET WIRE) — 11/07/11 — (All figures are in United States dollars).

Minefinders Corporation Ltd. (“Minefinders” or the “Company”) (TSX: MFL)(NYSE Amex: MFN) is today reporting its financial and operating results for the quarter and nine-months ended September 30, 2011 and confirming its production guidance for 2011.

The Company is pleased to announce that its Board of Directors has approved the construction of a mill, expected to have a minimum capacity of 6,500 tonnes per day, and the development of an underground resource at its Dolores Mine. Approval has also been given for the construction of a mine at the Company’s La Bolsa project.

Mark Bailey, President and Chief Executive Officer, commented, “With over 53,600 ounces of gold and over 2.65 million ounces of silver produced and sold for the nine-month period of 2011, we continue to be on track to meet our guidance for 2011. We are cash flow positive and with over $228.0 million in cash reserves, we are well positioned to unlock the potential of our existing assets and steadily increase gold and silver production.”

Third quarter 2011 highlights

—  Gold production of 16,279 ounces. —  Silver production of 692,121 ounces. —  Revenue of $53.8 million. —  Sale of 32,222 gold-equivalent ounces. —  Operating cash cost of $506 per gold equivalent ounce sold. —  Income from operations of $29.0 million. —  Positive cash flow from operations before changes in non-cash working     capital of $28.7 million or $0.35 per share. —  Adjusted net income of $13.2 million or $0.16 per share and a net loss     of $1.3 million, or $0.02 per share. —  Reported additional high-grade gold and silver intercepts at the La     Virginia Project. —  Filed an independently prepared National Instrument 43-101 compliant     technical report on the updated 2010 reserves and resources for the     Dolores mine (previously reported by news release on May 4, 2011) on     SEDAR and EDGAR.  

Financial and Operating Results

At September 30, 2011 the Company had $228.6 million in cash, cash equivalents and short-term investments, an increase from $166.9 million at December 31, 2010. Net working capital at September 30, 2011 was $236.2 million, an increase from $167.4 million at December 31, 2010. The primary reason for the increase in working capital during the nine-month period was cash flow from operations of $92.6 million and $12.0 million from the exercise of share options and warrants, partially offset by capital expenditures and repayment of the $17.0 million balance outstanding on our $50.0 million revolving credit facility. The entire facility is available as at September 30, 2011.

Adjusted net income for the quarter ended September 30, 2011 was $13.2 million or $0.16 per share and for the nine-month period was $58.8 million, or $0.73 per share. The Company uses adjusted net income as a supplemental financial measure in its evaluation of income during a period. The Company believes that adjusting for items including changes in the fair value of derivative liabilities and other unusual or non-recurring items assists in making assessments of net income for the period.

Gold and, more significantly, silver production increased in the third quarter and nine-month period of 2011 as compared to the third quarter and nine-month period of 2010 primarily due to higher average gold and silver grades stacked to the leach pad in immediately preceding quarters. Metal grades stacked in 2011 are consistent with plan and have generally increased from the prior year primarily due to sequencing in the open pit and mining practice improvements designed to decrease dilution.

For the current quarter, gold and silver production was lower than planned due to a reduction in cyanide concentration going onto the leach pad and timing of placing ore under irrigation. The reduction in cyanide concentration was a result of the Company’s primary supplier of cyanide declaring force majeure at the end of June 2011 and cyanide concentrations to the pad were being reduced. 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 while accessing the affected area for remediation, the east side of the pad was prepared for stacking. While no metal was lost as a result of this event, metal production was delayed during the changeover while new patios were prepared for irrigation. This work is now complete and the area under irrigation has been expanded. In addition, repair of the crushed collection pipe is substantially complete.

The Company expects production to improve in the fourth quarter and shipped over 7,900 ounces of gold and over 274,000 ounces of silver in October. Minefinders maintains its production guidance for 2011 of 65,000 to 70,000 ounces of gold and 3.3 million to 3.5 million ounces of silver at a cash operating cost between $450 and $500 per gold equivalent ounce sold assuming a 48 to one silver to gold ratio.

The third quarter and nine-month period of 2011 compare to 2010 as follows:

————————————————————————–                               Three months ended         Nine months ended                                     September 30              September 30 ————————————————————————–                                2011         2010         2011         2010 ————————————————————————– Ore crushed and  stacked (tonnes)         1,495,873    1,127,834    4,571,516    4,133,489 ————————————————————————– Strip Ratio                    2.13         2.13         1.97         2.32 ————————————————————————– Average gold grade per  tonne stacked (gpt)           0.53         0.52         0.52         0.44 ————————————————————————– Average silver grade  per tonne stacked  (gpt)                        42.77        52.99        44.95        35.39 ————————————————————————– Gold production (oz)         16,279        7,447       53,662       40,008 ————————————————————————– Silver production (oz)      692,121      184,887    2,653,620      707,120 ————————————————————————– Sales proceeds  (millions)                   $53.8        $13.6       $179.2        $61.6 ————————————————————————– Gold equivalent volume  sold (oz) (1)               32,222       11,170      118,498       53,076 ————————————————————————– Cash operating cost  per gold equivalent  ounce sold (1)                $506         $743         $477         $633 ————————————————————————– Total cash cost per  gold equivalent ounce  sold (1)                      $549         $779         $515         $669 ————————————————————————– Gold volume sold (oz)        15,945        8,070       53,708       41,827 ————————————————————————– Average realized gold  price (per oz)              $1,668       $1,214       $1,517       $1,157 ————————————————————————– Silver volume sold  (oz)                       693,532      202,800    2,665,024      729,597 ————————————————————————– Average realized  silver price (per oz)       $39.22       $18.74       $36.66       $18.09 ————————————————————————–  (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).  

As of January 1, 2011, the Company’s financial results are prepared in accordance with International Financial Reporting Standards (“IFRS”). As a result, accounting policies, presentation, financial statement captions and terminology used in this news release, the third quarter financial statements and Management’s Discussion and Analysis differ from that used in financial reporting in previous years. Further details on the transition to IFRS are included in the Changes in Accounting Policies section beginning on page 19 of Management’s Discussion and Analysis and in note 15 of the third quarter financial statements.

The complete unaudited condensed consolidated interim financial statements and accompanying Management’s Discussion and Analysis are available at www.sedar.com or on the Company’s website at www.minefinders.com.

Outlook

Dolores Mine

The Company’s Board of Directors recently approved the addition of a mill to complement the existing heap leach operation at Dolores. During the third quarter tender documents were issued to certain independent mine engineering firms for the preparation of detailed engineering design. The Company is in the process of reviewing bids and the chosen engineering firm is expected to begin detailed engineering work in the fourth quarter of 2011 and construction in the first quarter of 2012, subject to the receipt of permitting. Concurrently, the Company is accelerating the development of an underground exploration program below the existing open pit at Dolores. This work will include engineering, procurement of underground equipment and upon receipt of final permits, construction of an underground portal and decline.

Remediation work on the phase 1 leach pad is progressing and to date has included excavation of approximately 2.2 million tonnes to fully expose the affected area. Recent assessment of the excavated area on the phase 1 leach pad shows more damage to the liner than anticipated and indicates the liner may be impaired upslope from the excavated area. Accordingly, the Company is assessing various options to fully remediate the liner. The remaining low grade material on the phase 1 leach pad consists of approximately 8.3 million tonnes containing an estimated 3,800 recoverable gold ounces and 575,000 recoverable silver ounces. This material will be reserved for future processing, the manner of which will be determined based on the resolution of a remediation plan for the phase 1 pad.

La Bolsa Project

During the third quarter the Company received the most significant permits required from the relevant Mexican authorities for the Board to approve, and for management to begin to initiate, the construction of a mine at La Bolsa. The construction decision is based on the previously reported positive pre-feasibility study results as well as detailed engineering which was substantially completed in the third quarter by an independent engineering contractor retained by the Company.

Initial site access and infrastructure as well as adequate water supplies needed to operate the mine are currently being established. The recruitment of senior personnel necessary to construct and operate La Bolsa has also commenced.

The project has an initial mine life of approximately six years with current proven and probable mineral reserves of 316,000 ounces of gold and 4.5 million ounces of silver.

La Virginia Project

Exploration drilling at La Virginia is progressing and results continue to be encouraging. Two core rigs are currently dedicated to the project and the Company plans to add a third core rig before the end of the year. Drilling will continue to follow up on encouraging intercepts located in the three main zones and will also be extended to cover an area to the south of the existing zones.

Investor Conference Call

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 Dolores gold and silver mine in Mexico. For more information, please visit our website at www.minefinders.com.