03 Feb 2011 13:03 ET
MarketwireMansfield Minerals Inc.February 3, 2011 - 01:02:54 PMMansfield Discovers Gold Copper Porphyry SystemVANCOUVER, BRITISH COLUMBIA--(Marketwire - Feb. 3, 2011) - Mansfield MineralsInc. (the "Company") (TSX VENTURE:MDR) is pleased to announce the discovery ofa porphyry gold - copper gold system while completing a 2,000 metrecondemnation drill program on its 100% owned Lindero gold project inNorthwestern Argentina. The Arizaro gold-copper porphyry is located 3 kmsoutheast of the Lindero gold deposit. Significant copper-gold mineralizationwas encountered in five of the six holes that were drilled.--------------------------------------------------------------------------- Arizaro Drill Results ---------------------------------------------------------------------------Drill Hole # Interval Length Gold (g/t) Copper (%)---------------------------------------------------------------------------ARD 3 10 - 34 m 24 m 0.70 0.36---------------------------------------------------------------------------ARD 4 0 - 184 m 184 m 0.42 0.17---------------------------------------------------------------------------ARD 5 0 - 268 m 268 m 0.38 0.17 incl. 84 - 246 m 162 m 0.50 0.16 incl. 110 - 154 m 44 m 0.93 0.28 incl. 130 - 148 m 18 m 1.44 0.36---------------------------------------------------------------------------ARD 6 NSV NSV---------------------------------------------------------------------------ARD 7 0 - 206 m 206 m 0.30 0.15 incl. 0 - 54 m 54 m 0.33 0.26 incl. 44 - 54 m 10 m 0.75 0.37 incl. 74 - 96 m 22 m 0.39 0.18 incl. 124 - 146 m 22 m 0.45 0.20 incl. 190 - 206 m 16 m 0.54 0.12---------------------------------------------------------------------------ARD 8 24 - 36 m 12 m 0.64 0.24---------------------------------------------------------------------------Arizaro BackgroundThe Arizaro porphyry body was identified prior to the discovery of the Linderogold deposit in 1999. Management initially believed that the surfacealteration zone reflected a more deeply eroded porphyry system with geologicsimilarities to the nearby Rio Grande property. During a field traverse inlate 2010, a well mineralized copper-gold breccia fragment was discovered inan otherwise un-mineralized fragmental body. The mineralized fragment wasinterpreted to be sourced from a mineralized system at depth.Discussion of Drill ResultsHole ARD-5 encountered an intercept of 162 metres grading 0.50 g/t gold and0.16% copper with a sub-interval grading 0.93 g/t gold and 0.28% copper over44 metres. The higher grade interval is believed to part of a higher gradefeeder zone. The copper mineralization identified in Hole ARD-7 is a mix ofbornite and chalcopyrite. Given the proximity of Arizaro to Rio Grande, the Company will continue toevaluate Arizaro with a minimum of 3,000 metres of drilling to commenceshortly. Lindero UpdateThe Company is currently 80% complete on its bankable feasibility study atLindero. In early November 2010, the Company submitted a global mining permitwith the provincial mining ministry which is progressing through theappropriate channels with final approval expected in Q2/2011.This news release has been reviewed by Gordon P. Leask, P.Eng., President ofthe Company, and a Qualified Person ("QP") as defined by National Instrument43-101 (Standards of Disclosure for Mineral Projects).ON BEHALF OF THE BOARD OF DIRECTORS,Gordon P. Leask, P. Eng., PresidentSecurity - Chain of Custody and Quality ControlThe Company has implemented a quality assurance (QA) and quality control (QC)program to ensure the reliability of all litho-geochemical sampling andanalysis of both surface samples and drill samples from all of its projects.All samples are shipped directly to Alex Stewart International LLC, acertified laboratory sample prep facility in Mendoza, in sealed bags withunique Mansfield identification numbers. Analyses were executed using fireassay and multi-element ICP. Samples are prepared and analyzed only atinternationally certified labs (e.g., international standards ISO 9001:2000and ISO 17025:1999), which control their data quality with the use of reagentblanks, reference materials, and replicates. All lab control results pertinentto the Company, such as standards, blanks, and duplicates must be reported toMansfield. In addition, Mansfield independently inserts certified controlstandards, coarse field blanks, sample checks and duplicates into the samplestream to monitor data quality. These standards are inserted "blindly" intothe sample sequence and delivered to the laboratory. Mansfield knows thevalues that should be determined for these standard samples, but thelaboratory does not, and the standards act as an independent test of thelaboratory's accuracy of analysis. Mansfield inserts a minimum of 5% controlsamples in all sample batches and 10% control samples for drilling samples.The results of all data quality controls are carefully reviewed prior to thepublic release of any data. Cautionary Note to US Investors: This news release may contain informationabout adjacent properties on which we have no right to explore or mine. Weadvise U.S. Investors that the SEC's mining guidelines strictly prohibitinformation of this type in documents filed with the SEC. U.S. Investors arecautioned that mineral deposits on adjacent properties are not indicative ofmineral deposits on our properties. This news release may containforward-looking statements including but not limited to comments regarding thetiming and content of upcoming work programs, geological interpretations,receipt of property titles, potential mineral recovery processes, etc.Forward-looking statements address future events and conditions and thereforeinvolve inherent risks and uncertainties. Actual results may differ materiallyfrom those currently anticipated in such statements.FOR FURTHER INFORMATION PLEASE CONTACT: Mansfield Minerals Inc. Gordon P. Leask President and CEO (604) 681-4462 info@mansfieldminerals.com www.mansfieldminerals.com The TSX Venture Exchange has not reviewed and does not accept responsibilityfor the adequacy or the accuracy of this release.
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