QUALITY ASSURANCE / QUALITY CONTROL (QA/QC)
CBR Gold Corp. (the “Company”) maintains a rigorous quality control program with respect to the preparation, shipping, analysis and checking of all samples and data from the Committee Bay Greenstone and Niblack Properties. Quality control for drill programs at the Company’s projects covers the complete chain of custody of samples, including verification of drill hole locations (collar surveys and down-hole directional surveys), core handling procedures (logging, sampling, sample shipping) and assay-related work, including duplicate sampling, “check analyses” at other laboratories and the insertion of standard and blank materials. The QA/QC program also includes data verification procedures. Quality control was carried out by CBR Gold Corp. employees under the supervision of the Company's Vice President of Exploration, Peter Kleespies, M.Sc, P.Geol. Mr. Kleespies is a qualified person as described by National instrument 43-101.
CBR Gold Corp. has established a rigorous analytical quality control and quality assurance program with respect to sample analysis as part of its overall QA/QC protocols. This program includes the systematic insertion of blank materials (coarse and pulp) as well as certified reference materials (standards) into the sample stream. In addition, duplicate sampling (from core, reject and pulp materials) and “check” assaying (splits of coarse reject material sent to a second laboratory) are performed on a regular basis. Blank samples are used to check for possible contamination in laboratories. Field duplicate samples quantify over-all precision, while certified standards determine the analytical accuracy.
Nunavut
,
Canada
–
Committee
Bay
Greenstone Project (Gold)
Assaying gold samples from the Committee Bay Greenstone Project is conducted at TSL Laboratories in
Saskatoon
,
Saskatchewan
, using fire assay (2 AT) with gravimetric finish or screened metallic procedures. Any sample containing free gold is immediately sent for screened metallics assay. Any sample that returns an initial gravimetric assay of 20 g Au/t or greater is sent for re-assay by screened metallics. A scatter plot comparing assay results below 20 g Au/t shows strong agreement between the two types of assay procedures for the same samples.
As part of a comprehensive QA/QC program, one blank and one gold standard is inserted into the sample stream in each group of 20 samples. The analytical results for blank and, in particular, standard samples are monitored and if a results falls outside the expected range (certified value plus or minus two standard deviations), the entire sample lot is re-assayed. As an additional check, 10 percent of samples are re-assayed at ALS Chemex Laboratories in
North Vancouver
. Scatter plots comparing assay results from the two labs are checked throughout the program and the data has indicated a strong correlation.
For complete procedures in the QA/QC program, please refer to the technical report titled "2006 Exploration Summary Report- Committee Bay Greenstone Belt" by Andrew Turner, B.Sc., P.Geol. at APEX Geoscience Ltd.
USA
– Niblack Project (Polymetallic – Au, Ag, Cu, Zn)
Since the acquisition of the Niblack Project in October 2009, CBR Gold Corp. has implemented its extensive quality control program in the preparation, shipping and checking of all samples from the project. As part of a comprehensive QA/QC program, one blank and one standard is inserted into the sample stream in each group of 20 samples. The analytical results for blank and, in particular, standard samples are monitored and if a result for any metal (Au, Cu. Zn, Ag, Pb) falls outside the expected range (certified value plus or minus two standard deviations), the entire sample lot is re-assayed.
All drill core samples are sent to ALS Chemex Laboratories in North Vancouver, Canada, for sample preparation and analysis for gold by fire assay (30 gram) with atomic absorption finish and multi-element ICP-AES analysis using a 4 acid (HF-HN03-HCL04, HCl leach) “near total” digestion. Over limit values for Ag, Cu, Pb, and Zn are automatically re-analyzed using an “ore-grade” method that also uses 4-acid digestion followed by ICP-AES analysis with calibration for higher metal concentrations.
