Riverside Resources Inc. is pleased to announce that the Company has completed final earn-in requirements to the underlying concession holder for the Penoles Project, located in Durango, Mexico. In making the final cash and share payments Riverside has satisfied all terms of the option with its Mexican partner to earn its 100% interest in the Penoles Project.

Catalyst Copper Corp. announces that it has received a letter dated March 1, 2013, from an affiliate of Teck Resources Limited offering to grant Catalyst’s wholly owned Mexican subsidiary, Minera Hill 29 S.A de C.V. the option to acquire Teck’s interest in the La Verde property. The Purchase Option is subject to Teck, Catalyst and Minera Hill negotiating and signing a binding agreement by April 2, 2013, and is subject to TSX-V approval.

Mammoth Resources Corp. is pleased to report that it has received additional assay results from samples taken from its geological team exploring the company’s Tenoriba Property, located in the prolific Sierra Madre precious metal belt in south western Chihuahua State, Mexico. The best result from this most recent campaign, the third campaign mapping and sampling surface outcrops and structures on the property, assayed 9.4 grams per tonne (gpt) gold and 15.7 gpt silver, or 9.7 gpt gold equivalent (using a ratio of 50 gpt silver is equivalent to 1.0 gpt gold based on current gold and silver prices) from a grab sample located within the Moreno prospect on the property. This single highest gold assay was followed by 31 other samples that exceeded more than 3.0 gpt gold equivalent (refer to Table 1. Surface Outcrop Samples for complete assay results assaying greater than 0.3 gpt gold equivalent).

Almaden Minerals Ltd. is pleased to announce that it has signed a non-binding Letter of Intent with Tarsis Resources Ltd. to sell Tarsis a 100% interest, subject to a 2% net smelter returns royalty payable to Almaden, in four gold/silver properties located in Nayarit and Jalisco States, western Mexico and two gold properties in eastern Nevada, USA. A formal agreement is being prepared. This transaction is consistent with Almaden’s goal of creating assets through prospecting and maximizing shareholder exposure to discovery with minimum risk. The sale also allows management to focus time and resources on advancing the Company’s Ixtaca gold-silver discovery and its El Cobre copper-gold project.

Mercator Minerals Ltd. is pleased to provide an update on activities at its El Pilar copper project in northern Sonora, Mexico. Ongoing activities include continuing to de-risk the Project through additional metallurgical testing, which has already commenced, and completion of the final environmental permits for constructing the power line to the Project. All other permits for construction are already in place.

Vista Gold Corp. today announced the positive results of a Preliminary Economic Assessment for its Guadalupe de los Reyes gold/silver project in Sinaloa, Mexico.

Livermore’s discovery of microscopic gold in northern Nevada in the early 1960s sparked a modern-day gold rush and established the region as one of the world’s premier gold districts.