RE: NR aurcana (part 2) Quality Assurance - Quality Control
Sample intervals of drill core were two feet. One half of the cut core was placed in labeled polyethylene sample bags along with a sample tag and secured with a wire tie. Control standards and blanks were inserted into the sample batch by company geologists.
All samples were sent to Pinnacle Labs or American Analytical Labs in 2012 and were submitted by courier. Duplicate samples of returned pulps from selected high and low grade silver assays from Pinnacle Labs were sent for re-assay to American Analytical Labs for QA-QC purposes.
Samples were dried and reduced to minus ten mesh. A 250 gram sub sample was obtained and pulverized to 90% passing 150 mesh by ring and puck pulverizer. Multi-element analysis on 72 elements (including gold) consisted of 2 acid digestion and analysis by ICP-OES which was the standard method used in 2012. Silver and gold values greater than 2.917 Opt (100 ppm) were determined by Fire Assay with a gravimetric finish using a 30 gm prepared sub sample. Pulps and rejects from the assay process were returned to the company.
The scientific and technical information contained in this news release has been reviewed by Nils von Fersen, P.Geo. Vice President of Exploration of the Company, and a Qualified Person ("QP") as defined by National Instrument 43-101 (Standards of Disclosure for Mineral Projects).
2012 Shafter Exploration Drill Program ---------------------------------------------------------------------------Drill Hole From (ft) To (ft) Width (ft) Ag (Opt)---------------------------------------------------------------------------S-12-401(i) 921 934 13 7.75 (i)prev.disclosed ---------------------------------------------------------------------------S-12-407 917 922 5 5.3---------------------------------------------------------------------------S-12-410 992 1001 9 2.1---------------------------------------------------------------------------S-12-417 857 861 2 4--------------------------------------------------------------------------- 865 875 10 5.9--------------------------------------------------------------------------- 877 895 18 6.2---------------------------------------------------------------------------S-12-432 985 987 2 3.5--------------------------------------------------------------------------- 991 993 2 2.5--------------------------------------------------------------------------- 1011 1019 8 6--------------------------------------------------------------------------- 1033 1037 4 3--------------------------------------------------------------------------- 1046 1052 6 2.4--------------------------------------------------------------------------- 1060 1064 4 2.2---------------------------------------------------------------------------S-12-433 908 918 10 14.3--------------------------------------------------------------------------- 920 928 8 6.9---------------------------------------------------------------------------S-12-434 732.5 734 1.5 14.7---------------------------------------------------------------------------S-12-436 956.5 968 11.5 6.4--------------------------------------------------------------------------- 972 974 2 2.2---------------------------------------------------------------------------S-12-437 898 902 4 4.1--------------------------------------------------------------------------- 912 914 2 2.3--------------------------------------------------------------------------- 964 974 10 7.2---------------------------------------------------------------------------S-12-439 562 564 2 4.1--------------------------------------------------------------------------- 578 580 2 3.1--------------------------------------------------------------------------- 590 594 2 7.6---------------------------------------------------------------------------S-12-441 604 606 2 3.6--------------------------------------------------------------------------- 612 618 6 11--------------------------------------------------------------------------- 624 630 6 3.5--------------------------------------------------------------------------- 632 636 4 5.9--------------------------------------------------------------------------- 646 652 6 27---------------------------------------------------------------------------
Baltazar Solano-Rico and Betty Gibbs have reviewed the technical information reported in the National Instrument 43-101 technical reports regarding the La Negra Silver Mine. All National Instrument 43-101 technical reports can be found on the Company's website at www.aurcana.com or on SEDAR at www.sedar.com.
Baltazar Solano-Rico (M.Sc., Geol. Eng.) and Mrs. Betty Gibbs (E.M., MSc.) of Behre Dolbear are the independent Qualified Persons pursuant to NI 43-101 for the Company. Mr. Nils von Fersen (PGeo), Vice President, Exploration is also certified Qualified Person of the company. The technical contents of this release have also been reviewed by Nils von Fersen for QP technical disclosures.