Vancouver, March 1, 2012 – Baja Mining Corp. (TSX: BAJ – OTCQX: BAJFF) today announced that it has filed and is mailing a second letter to shareholders. In the letter, Baja responds to misleading statements by dissident shareholder Mount Kellett Master Fund II A L.P., and highlights Mount Kellett’s failure to address seven critical facts in its dissident circular. Baja cautions shareholders not to trust the Mount Kellett wolf in sheep’s clothing.

Vancouver, British Columbia — Silver Bull Resources, Inc. (TSX: SVB, AMEX: SVBL) (“Silver Bull”) is pleased to announce the appointment of George Rawsthorne P.Eng. to the role of Vice President of Metallurgy.

Excalibur Resources Ltd. announces that, further to its news release of February 23, 2012, it has completed its non-brokered private placement of 6,190,000 Units at $0.10 per Unit for a total of $619,000. Each Unit consists of one common share and one share purchase warrant, exercisable to acquire an additional common share at $0.15 per share during the first year, and at $0.20 per share in the second year.

New Gold Inc. (“New Gold”) (tsx and nyse amex:NGD) today announces financial and operational results for the fourth quarter and year ended 2011, with record annual earnings and cash flow. The company, once again, met its production guidance achieving record annual production of 387,155 ounces during 2011 at a total cash cost(1) per ounce sold, net of by-product sales, of $446 per ounce. The combination of increased gold production, well below industry average total cash cost(1) and continued strength in commodity prices led New Gold to the strongest financial performance in the company’s history. When compared to 2010, earnings from mine operations increased by 54% to $315 million, net earnings increased by 212% to $179 million, or $0.42 per share, and net cash generated from operations increased by 23% to $230 million. New Gold is also pleased to reiterate its guidance for 2012 with the targeted start of the New Afton Mine in June set to increase gold production further to 405,000 to 445,000 ounces at a lower annual total cash cost(1) per ounce sold, net of by-product sales, of $410 to $430 per ounce.

Silvermex Resources Inc. is focused on delivering growth through expansion of resources and production in 2012. Building on 2011, which was a transitional year for Silvermex, the Company’s efforts will be centered on upgrading and expanding resources to deliver sustainable production from the La Guitarra Mine, as well as delineating future production centers within the Temascaltepec Mining District for near-term production expansion. Over the course of 2011, Silvermex’s focus was on rebuilding, upgrading and redeveloping the La Guitarra Mine. The Company’s primary goal of reaching mill designedproduction capacity and achieving positive cash flow from operations was accomplished ahead of schedule and under budget.

San Marco Resources Inc. announces that it has arranged a non-brokered private placement of 2,133,334 units at $0.15 per unit for gross proceeds of $320,000.

Gold Resource Corporation today announced record 2011 production, fourth quarter results and provides its 2012 production outlook which continues to target an aggressive low-cost growth profile. Gold Resource Corporation is a low-cost gold producer with operations in the southern state of Oaxaca, Mexico.