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Company Information for Orosur Mining Inc

TSX.V-OMI; AIM-OMI

www.orosur.ca

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TSX.V; OMI

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Company Statement

Orosur Mining Inc. is a fully integrated gold producer and exploration company focused on identifying and developing gold projects in Latin America. The Company operates the only producing gold mine in Uruguay (San Gregorio), and has assembled an exploration portfolio of high quality assets in Uruguay & Chile and Argentina.

Highlights:

Gold production profile of at least 190,000 ounces over the four years to May 31, 2013 from open pit operations at the San Gregorio mine in Uruguay with the potential to significantly improve this production profile and reduce cash costs with the development of the Arenal Deeps underground deposit.
A development project at Pantanillo in the Maricunga Belt in Chile. Historical geological work on the Pantanillo property by Anglo American (1992-2005) and Kinross Gold (2005-2008) has defined a potential mineral deposit estimated to be in the range of 82 to 125 million tonnes grading 0.83 to 0.73 g/t gold, using a 0.6 to 0.5 g/t gold cut-off for the lower and higher tonnage estimates respectively, which is equivalent to 2.18 to 2.95 million ounces of contained gold. This preliminary assessment was made by Kinross Gold in 2007 and was estimated based on a total of 8,398 meters of reverse circulation drilling and diamond drilling. The potential quantity and grade of the potential mineral deposit is conceptual in nature as there has been insufficient exploration to define a mineral resource in accordance with disclosure guidelines in National Instrument 43-101 Standards of Disclosure for Mineral Projects and it is uncertain if further exploration will result in the target being delineated as a mineral resource. A planned exploration and development program targeting the definition of a NI43-101 compliant mineral resource would commence in 2010with the objective of creating a second production asset for the group within 3 to 4 years.
Further growth potential from the combined group's exploration portfolio in Chile and Uruguay including the Anillo project in Northern Chile which is along strike from the El Peñón mine operated by Yamana Gold Inc.
A combined group with the financial and technical resources to develop its business and capitalise on other gold growth opportunities in Latin America.
Cash on hand of approximately $US 8 million with no debt or hedging.

Current Operations

San Gregorio

The San Gregorio deposit has historically produced in excess of 400,000 ounces of gold from two open pit deposits down to approximately 200 meters vertical depth. In fiscal 2010, it is expect to produce 55,000 - 57,500 ounces. The remaining in-situ resource of 8 million tonnes at 1.04 g/t for 270,000 ounces gold lies mainly along strike to the west and at depth between the two pits. Approximately 70,000 ounces of this resource is planned to be mined from the final cutback of the San Gregorio pit.

Isla Christina Belt

SAN GREGORIO AND ARENAL DEEPS DISTRICT

OMI's operating gold mine; The San Gregorio Mine is located in Northern Uruguay in the historic Minas de Corrales mining district 450 kilometers north of Montevideo by paved road. The Minas de Corrales district forms the western flank of the Isla Cristalina Belt; a Proterozoic granite-greenstone belt approximately 110km long by 40km wide. The metamorphic grade of the greenstones rocks actually grade from greenschist into granulite facies however the belt is dominated by amphibolites facies rocks. The known deposits are spatially associated with the San Gregorio Shear Zone (SGSZ) and are often referred to as lode gold deposits due to their formation with quartz-carbonate boudens along shear structures in deformed rocks. The principal alteration assemblage associated with this style of mineralization is silica- carbonate-sericite-pyrite-chlorite-epidote. Gold mineralization is related to quartz-carbonate-pyrite lodes and silica-sulfide stock-work veining. The Isla Cristalina Belt contains a number of important structural features that are prospective for gold mineralization but to date all of the historic production has come from the Minas de Corrales district.

ZAPUCAY, KNOB HILL & ARGENTINITA

Introduction: The Zapucay, Knob Hill and Argentinita deposits are located 29 kilometers (trucking distance), southeast of the San Gregorio Plant. All 3 deposits are considered to be hosted along the same principal shear structure with Zapucay to the north Knob Hill about 500m to the south and Agentinita about 1km further south of Knob Hill. Production to date has only come from Zapucay and was about 900,000 tonnes at 1.76g/t for 51,000 oz Au. Both Knob Hill and Argentinita have reported resources.

Geology: The Zapucay & Argentinita deposits occur within a low angle, folded shear structure at or near the contact between granitic gneiss and underlying diorites. The mineralization is hosted in silicified mylonites and sub-horizontal quartz-carbonate lodes. The principal alteration assemblage associated with the mineralization is comprised of silica-carbonate-sericite-pyrite-chlorite. The host structure dips gently to the northeast but is folded along a steeply SW verging axial plane. It is also inferred that the thrust faulting may have occurred along the axial plane and may have played a role in upgrading mineralization especially at the Zapcuay deposit.

REGIONAL EXPLORATION

Summary: Regional exploration in the Isla Cristalina Belt has been redefined to include the prospects east of the Zapucay Mine. Current the prospects of interest are Curtume, Vaca Muerta and Vichadero. Additionally a regional stream sediment sampling program is being completed in areas with sparse sample data as part of generative exploration program.

Geology: Anomalous gold mineralization is present along the entire 110 kilometre strike length of the Isla Cristalina belt and is spatially associated with the Rivera Shear Zone. In the eastern two thirds of Isla Cristalina, and in particular at the Curtume, Vaca Muerta and Vichadero prospect, mineralized and sheeted vein complexes occur in granites and quartz monzonites.

Southern Uruaguay Projects

PRESIDENTE TERRA

Project Description: The Presidente Terra gold project, which is OMI's principal exploration property in the Dom Feliciano Belt, is located adjacent to the Sierra Ballena strike-slip fault zone. The project comprises a large gold mineralized system that has been traced for 11 kilometres along strike. The project area of 2,300 hectares is located approximately 240 kilometres northeast of Montevideo.

Geology: The project geology is characterized by granite, quartzite and meta-sediments which are cut by northeast trending high-angle shear zones. These shear zones are sub-parallel to the Sierra Ballena Fault. Gold mineralization is found associated with shear zones and quartz veins in granite, and at the contact between granite and quartzite meta-sediments. Historical and recent samples have defined mineralization over a strike length of 11 kilometres with reported values of up to 336 g/t Au in outcrop.

CASUPA-CRUCERA

Project Description: The Casupa-Crucera gold projects are 20 kilometres apart and are located 110 -130 kilometres north of Montevideo. The Casupa district is located at the eastern end of the La Florida Belt adjacent to the Dom Feliciano Belt. The total project area is 22,103 hectares. It contains many shear-zone hosted quartz veins which suggest the potential for economic bulk mining targets.

Geology: Both projects are characterized by multiple high-angle veins and shears that cut granitic host rock, and individually range in width from 1 to 15 metres. Strongly anomalous rock-chip samples have been reported from quartz veins and associated shear zones in both project areas.

NUEVA HELVECIA

Project Description: This gold project covers an area of 1,726 hectares and is located in the central portion of the La Florida Belt. OMI is earning a 100% interest in the Nueva Helvecia property through an agreement with Delcosur S.A., a private Uruguayan company.

Geology: The project geology comprises foliated meta-andesites, pelites, gabbros and felsic rhyolites. Quartz feldspar porphyry dykes occur in a structurally complex setting, along a west-northwest striking lithological contact. Gold mineralization is associated with arsenopyrite, pyrite and pyrrhotite in quartz veins and veinlets, and as disseminations in the volcanic host rock.

CHAMIZO

Project Description: This gold project covers an area of 26,772 hectares and is located in the central portion of the La Florida Belt in southern Uruguay, approximately 140 kilometres northwest of Montevideo.

Geology: The project is situated within the granite-greenstone terrane of the La Florida Belt. This terrane comprises Palaeo-proterozoic age rocks. Exploration is focused on one to two shear zone/quartz vein zones with over 10km strike length.

ISLA PATRULLA DISTRICT

District Description: This district includes the Isla Patrulla, Texas, Volcadero and Bragado prospects and covers a total area of 15,807 hectares in the Dom Feliciano Belt, at a distance of 350 kilometres northeast of Montevideo.

Geology: Proterozoic granites, quartzite and meta-sediments have been mapped in the Isla Patrulla district. Mapping and rock-chip sampling has confirmed the presence of mineralized quartz veins.

PASO DE LUGO

Project Description: This project is located 225 kilometres northwest of Montevideo in the Arroyo Grande Belt and covers an area of 20,363 hectares.

Geology: The geology consists of intrusive units ranging from felsic to ultramafic rock types and associated volcanic rocks. The ultramafic to mafic, intrusive to extrusive rocks range in composition from dunites and pyroxenites, to periodititic and basaltic komatiites. The felsic and an intermediate rocks are comprised of granite to dacites and tonalites. These rocks occupy an elongate northwest trending zone within a volcano-sedimentary sequence.

Non-gold

LASCANO PROJECT

Project Description: The Lascano project is based on a large magnetic and gravity anomaly located in the department of Rocha, 240 kilometres northeast of Montevideo. The project covers an area of 277,592 hectares and was originally identified in the late 1980's from a government regional geophysical survey. The anomaly is situated in a major northeast-southwest trending structural corridor.

Geology: The origin of the Lascano geophysical anomaly has been interpreted to be caused by gabbro to granitic (granophyre) rocks underlying a sequence of magnetic basalts and felsic volcanic rocks.

LEAD-ZINC-COPPER PROJECTS

Project Description: These projects, which include Retamosa, Maria Albina (Lead-Zinc), and Bragado (copper), cover a total area of 51,284 hectares in the Dom Feliciano Belt. The projects are located approximately 250 kilometres northeast of Montevideo.

Geology: The lead-zinc projects are situated within a carbonate formation of the Lavalleja Group, which was deposited in the Proterozoic, and which was deformed during the Brasiliano orogeny. Gossanous areas of hematite replacement and weathered out carbonates/sulphides occur in outcrop. At Retamosa, sphalerite, galena, silica, dolomite, calcite and iron oxide represent the principal gossan mineralogies. Previous exploration has targeted replacement style Mississippi Valley Type (MVT) lead-zinc mineralization.

NICKEL PROJECTS

Project Description: The Mal Abrigo and Cerros Negros projects cover an area of 24,185 hectares. They are located immediately north of the town of Mal Abrigo, approximately 125 kilometres northwest of Montevideo. The nickel projects also include the Carpintería project, which covers an area of 12,963 hectares, and is located approximately 30 kilometres east of the San Gregorio Gold mine in northern Uruguay.

Geology: Mal Abrigo and Cerros Negros are two spatially separate gabbro/norite complexes, within which outcropping disseminated nickel mineralization has been observed at several locations. These complexes, which may be part of the same event, intrude the San Jose granite-greenstone belt of the Piedra Alta Terrane, which forms part of the Rio de la Plata Craton. This Paleoproterozoic belt has an east-west length of approximately 200 kilometres, and is 30 kilometres wide in a north-south direction. The geology at Carpintería is comprised of a structurally deformed sequence of granites, felsic gneiss, serpentinized ultramafic including talc-tremolite schists, deformed mafic lithologies, iron formation and graphitic black shales.

RIVERA DIAMOND PROJECT

Project Description: The Rivera diamond project comprises an area of 55,525 hectares. It is located on the Rio de la Plata craton in the departments of Rivera and Tacuarembo in northern Uruguay, approximately 500 kilometres north of Montevideo. The reported recovery of alluvial micro- and macro-diamonds historically, and in the 2007 exploration program, illustrates the potential for the discovery of kimberlites in this region.

Geology: The Rio de la Plata Craton which is considered to be of Palaeo-proterozoic age in northern Uruguay, hosts kimberlites and related rocks in southern Brazil and Paraguay. The Rivera project area which consists of Upper Palaeozoic and Mesozoic sediments, and which borders the Cretaceous Parana Basin, is considered prospective for diamondiferous kimberlites. The project is located within a prominent northwest-southeast trending structural corridor, which is a favorable setting for kimberlite emplacement.

Geographical Spread

Uruguay, Chile

Board of Directors and Key Management

Mario Caron	Non-Executive Chairman
David Fowler	Director and Chief Executive Officer
Ignacio Salazar	Director and Chief Financial Officer
William Lindqvist	Non Executive Director
Julio Porteiro	Non Executive Director
Roger Davey	Non Executive Director
Patricia Rodríguez	Company Secretary & Legal Counsel

Company Address

Puntas de Santiago 1604
C.P. Montevideo, Uruguay 11500


Telephone:	+5982 6016354
Facsimile:	+5982 6006232
Email:	info[at]orosur.ca
Website:	http://www.orosur.ca

Capital

Common Shares Outstanding; 64,432,706
Fully Diluted; 68,973,021

Annual General Meeting

November

Year End

May 31

Nominated Advisors

Matrix Corporate Capital LLP
One Vine Street, London W1J 0AH ‐
United Kingdom
Tel: + 44 (0) 20 3206 7000
Contacts: Louis Castro / Tim Graham

Major Shareholders

AXA and affiliates	5,471,587	8.49%
SAAD Investment	4,904,000	7.61%
HSBC Global Custody Nominee (UK) Limited	4,434,075	6.88%

Most Recent Statement

02/03/10 - Orosur Mining Inc. announces results for updated resource estimate of Arenal Deeps of 2.05Mt @ 3.68g/t (using a 1.5g/t cutoff)
04/02/10 - Orosur Mining Inc. announces New Website Address
15/01/10 - Orosur Mining Inc. Directors Dealing
14/01/10 - Orosur Mining Inc. Announces Results for the Second Quarter and First Half of Fiscal Year 2010
10/01/10 - Orosur Mining Inc. Grants Option to Gladiator Resources to Earn Up to 80% Interest in Iron Ore, Manganese Ore and Base Metals Prospects in the Isla Cristalina Belt in Uruguay
07/01/10 - Completion of Plan of Arrangement - Change of Company Name

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