Soltera Mining Receives Environmental Impact Statement Approval

Orocobre provides Olaroz Lithium Project Construction Update

Arizaro Project - Mineralization potentially amendable to Heap Leach Processing

Minera IRL - Three New Gold Vein Systems near Don Nicolas

Minera IRL Limited reported positive exploration results from three new gold vein systems near Don Nicolas project,Santa Cruz province.

Highlights include:

- The Cecilia Prospect hosts an undrilled, two-kilometre long, vein system with recent surface diamond saw channel sample results up to 19.3g/t gold, and is located approximately 20 kilometres south of the proposed site of the Don Nicolas Project treatment plant. To date, systematic diamond saw sampling has encountered significant gold mineralization over at least 1.5 kilometres of the principal vein structure, which remains open along strike.

- The Paula Andrea Prospect is an undrilled vein system with recent surface diamond saw channel sample results up to 54.4g/t gold. It is located less than four kilometres southeast of the Sulfuro Vein (Measured and Indicated Resource of 498,361 tonnes grading 9.2g/t gold containing 147,214 ounces), a significant contributor of high-grade ore to the Don Nicolas Project. Diamond saw channel sampling of quartz vein outcrops along three mineralized trends at Paula Andrea has returned a number of high-grade gold assays.

- At the Goleta Prospect, recent surface sampling returned scattered gold values up to 24.9g/t gold over an area of 600m by 400m. It is located approximately six kilometres north of the proposed Don Nicholas processing plant site at Martinetas. The Company recently sourced historical exploration results carried out by Yamana Gold Inc in 1997. These results included 49 shallow reverse circulation drill holes for a total of 1,326 metres, with the best hole intersecting six metres grading 27.7g/t gold. Field work carried out by Minera IRL has defined anomalous gold mineralization at Goleta over a 600 metre by 400 metre area.

All three prospects are in close proximity to the planned infrastructure for the Don Nicolas Project, where financing negotiations with Argentina based funds are currently progressing.

McEwen Mining Provides Operational and Development Update

McEwen Mining Inc provided a summary of significant developments and first quarter operating results during Q1, 2013: Production results for the company's share in San José mine (Santa Cruz province / 49% shareholding) was 10,328 gold ounces and 661,915 silver ounces, representing 23,057 gold equivalent ounces (converting silver into gold using a 52:1 ratio). Production for the remaining quarters is expected to be slightly higher. In 2013, McEwen Mining's share of production has been forecast at 102,700 gold equivalent ounces.

At Los Azules (San Juan province), this season's exploration effort focused on expanding the resource base. A total of 15,800 meters of drilling was completed which produced a 17% increase in contained copper in the Indicated Resource category, to 5.4 billion poundsof copper and a 32% increase in contained copper in the Inferred Resource category, to 14.3 billion poundsof copper, since the June 2012 estimate of mineral resources.

This updated resource estimate will form the basis of a new Preliminary Economic Assessment (PEA), which is expected to be completed in the third quarter of 2013. This PEA will evaluate the possibility of: (1) increasing the daily throughput; (2) producing copper cathode instead of a concentrate and (3) processing low-grade mineralized material not previously considered, via a heap leach.

The advantages of being able to produce a copper cathode rather than a copper concentrate are twofold: first, it would eliminate the capital intensive, concentrate pipeline through Chile; and second, it would reduce the applicable export tax by 50%.

Hunt Mining’s Exploration and Operations Update

Marifil Partners With Southern Copper on Cerro Samenta

Marifil Mines Limited announced that it has signed a definitive agreement with Southern Copper Argentina ("SCA"), a wholly owned subsidiary of Southern Copper Corporation for SCA to acquire a 70% equity interest in the Company's Cerro Samenta porphyry copper project in Salta Province

The agreement is subject to the following terms to earn a 70% equity interest in the property:

1. SCA will pay Marifil a total of $375,000 over four years including $75,000 on signing the agreement
2. SCA will carry out a minimum $4 million work program on the property over four years

SCA will make the contract payments on behalf of Marifil to two underlying property owners over a six years period.

Additionally, SCA can increase their equity interest from 70% to 80% by providing Marifil with a bankable feasibility study within seven years of the date of signing.

Southern Copper Corporation is an integrated copper producer and in 2011 was the 7th largest copper producer in the world with sales of $6.8 billion. SC produces copper, molybdenum, zinc and silver. All of its mining, smelting and refining facilities are located in Peru and Mexico, and SC conducts exploration activities in those countries and in Argentina, Chile and Ecuador.

High Grade Zone at Filo Del Sol Project

NGEx Resources Inc. provided the complete results from the 2012/2013 exploration program at the Filo del Sol project located in San Juan province. The results of this season's drilling expand the previously identified high grade copper zone at Filo del Sol and extend the broader zone of disseminated copper, gold, silver mineralization that surrounds the high grade zone.

Filo del Sol is a high sulphidation epithermal copper-gold-silver system that overlies a porphyry copper-gold system. It is part of the Vicuña Project which includes the nearby Los Helados and Josemaria copper-gold porphyry deposits. Filo del Sol is a very large mineralized system, with minimum dimensions, based on wide spaced drill holes, of 2.8 kilometres in a north-south direction and 1 kilometre in an east-west direction.

The system includes both disseminated and stockwork mineralization and is open in all directions. Leaching and secondary enrichment of this mineralized system has created a high-grade copper-silver zone, further adding to the potential of the deposit.

These results, combined with previously released drilling, are encouraging and support plans for a larger drill program next season that could, if successful, lead to a maiden resource estimate for the project. The exploration season is during the South American summer and drilling is expected to restart in late 2013.

A total of 819.6 metres were drilled in 5 holes during the program. Highlights from the results reported include: FSDH08 with 38.1m of 1.23% copper, 0.21 g/t goldand 10.9 g/t silverand FSDH11 with 65m of 0.77 g/t gold.

The 2012/2013 drill program focused on expanding the high-grade copper-silver zone which occurs in the northern part of the mineralized system and has been traced by previous drilling over a distance of at least 1,200 metres.

Encouraging Results from Preliminary Drilling at Corina Project

Samco Gold Limited announced encouraging results from the preliminary drill campaign on the Cerro Cubilete target at its Corina Project in Santa Cruz province.

Samco Gold has completed a ten-hole, fully cored drill program. The program was carried out at the Cerro Cubilete silver prospect, where Samco has previously announced a NNE-trending, 300 x 75m zone of high to bonanza silver grades in rock chip samples.

The drill program, which totals 2,148m, was carried out between January 10 and 28, 2013. Nine holes were drilled on four sections oriented at 295°, and angled at -55°. The distance between the northernmost and southernmost sections is 270m. The tenth hole was drilled on an azimuth of 238°, and angled at -50°, to investigate possible hangingwall mineralization.

- Drilling on four fences has defined an east-dipping and probably south-plunging mineralized body over a strike length of at least 270m and width up to 70m, open at depth and in all directions.

- Of the nine parallel holes, eight intersected what appears to be a broad NNE striking silver-lead-zinc mineralized body. The Cubilete Structure dips 30-45° E and occurs in the footwall of a fault with similar orientation it is hosted by oxidized and brecciated volcanics which are also inferred to dip to the east. Flow-banded rhyolite at depth suggests the body may be located on the east flank of a buried rhyolite flow-dome.

- Notable intersections include:
-In the North of the Structure, (CCDDH008) 32 metres averaging 75ppm silver; 3.02% silver and 0.66% zinc from 26 metres including, from 54 metres, 2 metres averaging 178ppm silver; 2.56% lead and 0.67% zinc;
-In the South of the Structure, (CCDDH007) 10 metres (from 67 metres) averaging 0.29ppm gold; 57ppm silver, with trace lead and zinc;

At Cerro Cubilete, silver and base metals are associated with strongly anomalous iron, magnesium, barite, and molybdenum in both outcrop and drill-core, suggesting an intermediate sulfidation style of mineralization. Anomalous values of these elements also occur in outcrop at Cerro de la Mina, 1 km to the west, within a large ground magnetic low which trends NW and also pass through Cerro Cubilete.

Exploration Update Chita North Porphyry Sector, Chita Valley Cu-Mo-Ag-Au Project

Minsud Resources Corp. announced exploration results from the Chita North Porphyry area of the Chita Valley diatreme volcanic vent/porphyry complex, located in San Juan province.

The following is an update on recent exploration work conducted on the Chita North sector of the Chita Valley Project. The Project is a large exploration stage diatreme volcanic vent/porphyry complex with classic alteration features, widespread porphyry style Copper-Molybdenum-Silver-Gold mineralization, and associated gold and silver-bearing polymetallic veins.

Exploration Work First Quarter 2013

The current exploration program represents a balance between systematic multidisciplinary exploration and prudent use of limited funding in a poor financial market. As a result Minsud is currently concentrating primarily on the continuation of systematic detailed geological mapping and alteration studies with selective surface sampling.

The strategy is to continue expanding the areas covered by detailed mapping to eventually include the entire Chita Valley Properties area. Lithological, alteration, structural and mineralization studies that initially focused on the Chinchillones and Chita South Porphyry areas are being expanded to include other nearby sectors (Chita North Porphyry, Breccias Ridge, Placetas Porphyry, Romina and Minas de Pinto) to eventually produce a coordinated exploration and mineral deposits model for the entire property.

Regulus Commences Drilling at the Cerro Cori Gold Target

Regulus Resources Inc. has commenced a drilling campaign at the Company's 100% owned Cerro Cori gold target located two kilometres northeast of the main Rio Grande Project in Salta Province. Near-surface gold mineralization was discovered with a single drill hole at Cerro Cori in late 2012 (RGR-12-118 with 297 m containing 0.36 g/t goldfrom the surface). In the intervening months the Company has completed a follow-up program consisting of trenching, geological mapping, and extension of the existing ground magnetic survey in preparation for the current drilling program.

The work completed over the last several months at the Cerro Cori gold target has confirmed potential for near-surface gold mineralization amenable to heap leaching. The company believes that the multi-directional, sheeted quartz-magnetite vein style of mineralization at Cerro Cori may represent the upper levels of a system similar to the nearby Lindero gold deposit, located ten kilometres to the southeast. Goldrock Mines recently announced the completion of a positive feasibility study for a heap-leach gold operation at Lindero and is fully permitted for mine development. The proximity of the projects presents opportunity for synergy if similar mineralization is encountered at Cerro Cori and this possibility can be tested for very low cost.

A total of 3,127 metres of trenching has been completed and sampled at the Cerro Cori gold target, largely in areas of limited outcrop exposure. This trenching has confirmed the presence of elevated gold, ranging from 0.2 to 1.1 g/t.

The Company started a 1,200 metre drilling programme, comprised of four to five shallow (<250-300 metre) holes, on May 10th, 2013. Drilling is expected to be completed by the end of the month with assays available shortly thereafter. This low-cost program is intended to determine if there is potential for significant grade and volume of mineralization to warrant additional drilling.

U3O8 Corp. Completes Acquisition of Calypso Uranium Corp.

U3O8 Corp. and Calypso Uranium Corp. announced the completion of the acquisition of Calypso by U3O8 Corp. The Acquisition expands U3O8 Corp's strategic land position around the state-owned Cerro Solo and Sierra Pintada uranium deposits in Argentina and adds approximately $3.3 million in working capital.

Under the terms of the Acquisition, U3O8 Corp. issued 20,252,327 common shares in exchange for all of the 50,630,819 issued and outstanding common shares of Calypso, on the basis of 0.40 of one U3O8 Corp. share for each whole Calypso share.

U3O8 Corp. has now solidified its position as a leading uranium company in Argentina at a time when the country is seeking local uranium production to fuel its growing nuclear fleet. U3O8 Corp. continues to progress on a preliminary economic assessment expected in the second half of 2013 on its Laguna Salada Deposit (Chubut province) towards positioning this project as a potential low-cost, near-term uranium producer. With the Calypso properties, U3O8 Corp. consolidates its strategic holdings adjoining Argentina's two largest known uranium deposits, and sets up a strong pipeline of projects for exploration after Laguna Salada.