Guyana Frontier Reports Drill Results from Sardine Hill Gold Project

VANCOUVER, June 16, 2011 /PRNewswire/ - Guyana Frontier Mining Corp. ("Guyana Frontier") is pleased to announce the results of a diamond drilling program at the Sardine Hill Gold Project located in Guyana, South America. A total of 3,076 metres were drilled in 18 holes. Drill core logging and sampling has been completed, and analytical results for gold have been received, compiled and interpreted. Further analytical results for copper and other elements are pending.

Highlights of the 2010-2011 Drill Program

Known gold mineralization at Sardine Hill occurs in saprolite (deeply-weathered bedrock) that may be up to 150 metres thick on portions of the property. Thirteen of the eighteen drill holes intersected gold-bearing saprolite from surface, including:

• DDH SH11-04 intersected 1.33 grams/tonne gold over 73.5 metres (estimated true width 53.66 metres);
• DDH SH11-07 intersected 0.73 grams/tonne gold over 137.38 metres (estimated true width 101.38 metres);
• DDH SH11-09 intersected 1.68 grams/tonne gold over 67.5 metres (estimated true width 49.28 metres);
• Drill holes SH10-01 and SH11-02 confirmed the presence of gold mineralization 600 and 660 meters respectively north of the previously known gold mineralization.

Fourteen of the eighteen drill holes were collared along east-west sections at 50 metre intervals along 300 metres of strike length to confirm the grade and geometry of shallow portions of the historical gold-mineralized zone. The main target area of Guyana Frontier's 2010-2011 drill program was previously mapped by auger geochemistry, trenching and diamond drilling by International Roraima Exploration in 1995-1996, and by Newmont Overseas Exploration in 1999. To view a map of Sardine Hill visit Guyana Frontier's website at: http://www.guyanafrontier.com/s/SardineHill.asp.

Two of the drill holes, SH11-05 and SH11-18, were drilled to define an interpreted structure which offsets the northern portion of the mineralized body as defined by historical work. Holes SH10-01 (lost at 79.5 meters) and SH11-02 confirmed the presence of gold mineralization 600 and 660 metres further north of the previously known mineralized body. Guyana Frontier intends to conduct further geological mapping, ground geophysics and drilling during future work programs to help evaluate the extensions of the mineralized zone.

The Sardine Hill drill holes intersected intensely weathered saprolite, showing pervasive chlorite, ankerite and sericite alteration assemblages, varying amounts of tourmaline in veining, widespread disseminated pyrite and lesser chalcopyrite in foliated and veined zones. None of the drill holes were extended to test the projected fresh bedrock portion of the mineralized zone.

Saprolitic weathering is viewed as a positive aspect of the Sardine Hill gold mineralization because the weathered rock is generally softer and the gold mineralogy is less complex than is commonly the case for unweathered bedrock.

Gold results from this drill program are presented in Table 1.

Table 1.   Sardine Hill 2010-2011 Diamond Drilling Results

General Criteria for Calculation of Mineralized Intercepts            

Sample and assay intervals are based on drilled intervals with controlled start and end depths. The estimate of grade across width is based on the multiple of reported gold values and reported sample intervals. Core recoveries ranged from 100%, to less than 50% in short intervals, and all drilled intervals were treated equally in the weighted mean calculations. Sequences of samples with less than 0.15 grams of gold per tonne across more than three contiguous samples are not included in stated intercepts.

Analytical Methods           

All drill samples are shipped directly to the independent preparation facility of Activation Laboratories Ltd. ("Activation") in Georgetown, Guyana ("ActLabs Guyana") for sample preparation. All gold fire assay determinations are conducted in Activations' Venezuelan facility while multi-element analyses and copper assays are completed at its Ancaster, Ontario headquarters.

At ActLabs Guyana, all drill samples were crushed to 90% passing -10 mesh (1.7 mm), then split to provide a 250 gram subsample which is pulverized to 95% passing 150 mesh (105 microns). A 50 gram split is subject to Fire Assay Preconcentration gravimetric analysis, with results reported in grams per per tonne with a lower limit of 0.03 grams per tonne. A separate sub-sample, 0.25 grams of the pulp is subject to four-acid digestion and analysis by ICP/OES (Optical Emission Spectroscopy) to provide analyses for 35 elements.   Upon receipt of all analytical results from the 2010-2011 drilling program, a selected suite of gold bearing intercepts will be re-subsampled for supplemental analysis using screen fire metallics to evaluate possible "nugget effect" to determine if coarse gold is present in the samples.

An airborne magnetic, VLF (very low frequency) and radiometric survey was completed by Terraquest Ltd. in February, 2011 at Sardine Hill. A total of 649 line kilometres were flown. Guyana Frontier's technical team is working to integrate the airborne data with other geochemical and geological data in support of future drill target development.

The technical work disclosed in this document was planned and supervised by David Bending, M.Sc., P.Geo., President and CEO of Guyana Frontier, who is a Qualified Person as defined in National Instrument 43-101, and is responsible for all technical information contained in this news release.

About Sardine Hill

Sardine Hill consists of one Large Scale Prospecting Licence totaling 10,427 acres (4,219 hectares) located approximately 90 kilometres from the capital city of Georgetown. Guyana Frontier has the right to earn a 100% interest in Sardine Hill from a private Guyanese corporation, subject to a 3% net smelter returns royalty. Pursuant to an option agreement dated May 14, 2010 between Guyana Frontier and Mulgravian Ventures Corporation ("Mulgravian"), Mulgravian has an option to earn a 51% interest in Sardine Hill from Guyana Frontier. Guyana Frontier is the operator of Sardine Hill work programs.

About Guyana Frontier

Guyana Frontier is a public mineral exploration company listed on the TSX Venture Exchange (TSX-V: GYG), and is focused on the exploration, discovery and development of precious metals deposits located within Guyana, South America. Guyana Frontier began acquiring interests in Guyanese exploration properties in 2007, and now holds various rights to obtain working interests in approximately 342,000 acres (138,400 hectares) of prospective lands. Guyana Frontier's main asset is the Marudi Mountain Project, which was the subject of extensive historical exploration, but has not been the focus of a diamond drilling program since 2004. Guyana Frontier's goal is to develop a significant gold resource at the Marudi Mountain Project, and to explore its other Guyanese projects using funding from exploration partners.

Neither the TSX Venture Exchange nor its Regulation Services Provider
(as that term is defined in the policies of the TSX Venture Exchange)
accepts responsibility for the adequacy or accuracy of this release.

Forward Looking Statements

Forward-looking statements are based on a number of material factors and assumptions, including, the result of drilling and exploration activities, that contracted parties provide goods and/or services on the agreed timeframes, that equipment necessary for exploration is available as scheduled and does not incur unforeseen break downs, that no labour shortages or delays are incurred, that plant and equipment function as specified, that no unusual geological or technical problems occur, and that laboratory and other related services are available and perform as contracted.  Forward-looking statements involve known and unknown risks, future events, conditions, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, prediction, projection, forecast, performance or achievements expressed or implied by the forward-looking statements. Such factors include, among others, the interpretation and actual results of current exploration activities; changes in project parameters as plans continue to be refined; future prices of minerals; possible variations in grade or recovery rates; failure of equipment or processes to operate as anticipated; the failure of contracted parties to perform; labour disputes and other risks of the mining industry; delays in obtaining governmental approvals or financing or in the completion of exploration, as well as those factors disclosed in the company's publicly filed documents. Although Guyana Frontier has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

SOURCE Guyana Frontier Mining Corp.