For veins, a search ellipse was used with dimensions 50 m x 50 m x 20 m oriented according to the strike and dip of the veins. For breccia and mineralized basalt, a search ellipse was used with dimensions 90 m x 53 m x 142 m. In veins, the estimate used a minimum of 1 composite and maximum of 5, with no maximum limit of samples per hole. In breccia and mineralized basalt, the estimate used a minimum of 3 composites and a maximum of 10, with a maximum of 3 samples per hole.
To categorize the blocks, a combined strategy was applied, using quantity of holes and distance used for estimation and visual evaluation of drilling density. Only blocks of breccia and mineralized basalt were classified as measured, considering that to categorize a block as measured, a minimum of 2 holes within a distance of 30 m are required. The blocks estimated using at least 2 holes in a distance of 100 m were classified as indicated. The blocks in veins estimated with the unique search ellipse of 50 m were categorized as indicated. The blocks that do not accomplish the parameters described were categorized as inferred.
A total of 2,100 specific gravity measurements were used to define the density of each block. For blocks of basalt rock type a density of 2.87 tonnes / m3 were used, for veins and breccia a density of 2.75 tonnes / m3, and 2.67 tonnes / m3 for saprolite.
Sample Preparation and QA/QC program
The core samples were split by rock saw, and half of the core was sampled. Core samples were prepared by ALS Colombia Ltd., in Medellin and were assayed at the ALS laboratory in Lima, Peru (before November 2013, SGS Colombia S.A. Laboratory was used for preparation and SGS Peru for assaying). Gold was analyzed by fire assay on a 30 gram sample with atomic adsorption spectrophotometer (AAS) finish. Samples above 10 g/t Au were repeated by fire assay on a 30 gram sample with gravimetric finish. Silver and other 47 elements were analyzed by inductively coupled plasma mass spectroscopy (ICP-MS) following multi-acid digestion. A program of metal screen analysis was carried out on 459 samples. This program provided important information about the behavior of coarse gold in the deposit. Blank, standard and duplicate samples were routinely inserted for quality assurance and quality control, including second laboratory control.
Ongoing Work Program
Seafield has also commenced studies that include metallurgical test work, hydrogeology, and geotechnical studies for pit, plant site and tailings disposal facilities.
Environmental baseline studies have been ongoing since January 2012. Seafield expects that all baseline data required for submitting an Environmental Impact Assessment to the Colombian authorities will be complete in Q3 2013, allowing for an environmental permit submission in Q4 2013.
Scott Wilson of Metal Mining Consultants Inc. of Englewood, Colorado prepared the Miraflores Deposit resource estimate. The Company will file a NI 43-101 technical report in support of the technical information in this press release within 45 days.
Mr. Wilson is an independent qualified person as defined by National Instrument 43-101 and has prepared or reviewed the preparation of the information which forms the basis of this press release. He is a Certified Professional Geologist and member of the American Institute of Professional Geologists (CPG #10965) and a Registered Member (#4025107) of the Society of Mining and Metallurgy and Exploration, Inc., a professional association and designation recognized by the Canadian regulatory authorities. Mr. Wilson verified the data disclosed in this release, including the sampling, analytical and test data underlying the information contained in this release. Verification included a review and validation of the applicable assay databases and reviews of assay certificates.
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