[cid:image004.gif@01CB6B7A.3127DFB0] AIM and PLUS code: MARL 14 October 2010 Las Calandrias Gold-Silver Project Surface Rights Secured, Santa Cruz Province, Argentina Mariana Resources Ltd (Mariana or the Company), the AIM quoted exploration and development company focussed on Argentina and Chile, has purchased the Estancia La Calandria, and thereby the freehold surface rights to the 23,400 hectare area of its flagship Las Calandrias gold and silver project (Las Calandrias) located in the prospective Deseado Massif gold district in southern Argentina.

The purchase gives the Company more flexibility in the future to fast-track the exploration and development of the project.

The surface rights cover all of the known Mariana gold mineralised zones at Las Calandrias as well as those areas considered to be the highly prospective for new gold discoveries. The surface rights purchase agreement grants the former owner the ability to occupy and farm livestock on all vacant land areas at Las Calandrias as to not interfere with any exploration and future mining operations. Mariana has advanced infrastructure on site which currently includes the Las Calandrias project office, two new core sheds and the recently purchased new camp facility.

This facility caters for a capacity of 36 people and is fully operational as the 10,000m drill programme aimed at defining a maiden resource at Las Calandrias is now underway. Marianas Chairman John Horsburgh said: "The purchase of the freehold surface rights demonstrates our commitment to our flagship Las Calandrias project as we continue to advance the project through the development cycle and up the value curve.

The purchase not only secures our access to the project but gives us future flexibility to optimise further exploration work and development infrastructure. "Mariana is continually engaging local communities and has maintained a very good relationship with the previous owner which we hope to build upon as we develop the Las Calandrias project.

We believe this purchase demonstrates Marianas commitment to the project, local community and the Santa Cruz Province as a place where junior explorers can add wealth for shareholders through discovery and development." The 23,400 hectare land area at Las Calandrias makes up the surface rights as displayed in the attached map of the Estancia La Calandria. For further information please visit website at www.marianaresources.com or contact the following. John Horsburgh (Chairman) Mariana Resources Ltd +61 2 94374588 John Sutcliffe (MD) Mariana Resources Ltd +593 99 808080 Glen Parsons (CFO) Mariana Resources Ltd +61 2 94374588 Rob Adamson RFC Corporate Finance Limited (Nomad) +61 2 9250 0041 Will Souter RFC Corporate Finance Limited (Nomad) +61 2 9250 0050 Joe Lunn (Analyst) FinnCap (Broker) +44 20 7600 1658 Matthew Robinson FinnCap (Broker) +44 20 7600 1658 Felicity Edwards St Brides Media and Finance Ltd (PR) +44 20 7236 1177 Hugo de Salis St Brides Media and Finance Ltd (PR) +44 20 7236 1177
About Mariana Resources Mariana Resources Ltd is an AIM quoted exploration and development company with an extensive portfolio of gold, silver and copper projects in Argentina and Chile.

In Argentina, in addition to the Las Calandrias gold-silver discovery, the Company owns the Sierra Blanca silver prospect and has a joint venture with Hochschild Mining.

Mariana also owns exclusive exploration rights to a 160,000 Ha area acquired following detailed interpretation of satellite imagery.

All of these projects are located in the Deseado Massif gold district in mining-friendly Santa Cruz province of southern Argentina, which hosts four gold/silver mines and several notable bonanza precious metal prospects. In Chile, Mariana has a joint venture agreement with US based international mining and natural resources company Cliffs Natural Resources Inc., to explore for Iron Oxide-Copper-Gold deposits (IOCG) in a 92,000 sq.

km area (SCM Mariana Area) in north-central Chile.

The SCM Mariana Area includes two Iron Oxide Copper Gold (IOCG) exploration projects in the highly prospective Atacama Fault Zone, approximately 100 km from Freeports Candelaria Copper Mine: the 44km2 Buenaventura and 46km2 Perro Chico projects.
Felicity Edwards St Brides Media and Finance Ltd Chaucer House 38 Bow Lane London EC4M 9AY Tel: +44 (0) 207 236 1177 Mob: +44 (0) 7748 843871 Fax: +44 (0) 207 236 1188 Email: Web: www.stbridesmedia.co.uk