New Found Provides Results of QA/QC Review
New Found Gold Corp. (NFGC) announced that independent consultants concluded there is no systematic bias in its assay results after analyzing 475 half-core duplicates. This investigation, initiated after potential bias was noted, included a thorough review of sampling, preparation, and lab procedures. The results confirm that the company’s operating procedures are sound, allowing it to resume normal reporting. Despite some high natural variability in gold grades, findings indicate assays are reliable, with no significant contamination or accuracy issues detected.
- No evidence of systematic bias in assay results.
- Well-conceived standard operating procedures for core sampling.
- Resumption of normal reporting of assay results.
- High natural variability in gold grades could complicate future assay consistency.
Figure 1. Scatterplot of field duplicates with visible gold highlighted; Table 1. Sample intervals above 1 g/t with the most variable field duplicate results and factors contributing to field duplicate uncertainty. (1)Rock Quality Designation (‘RQD’). (Graphic: Business Wire)
The investigative program was led by
HIGHLIGHTS
- New Found's independent consultants have concluded that there is no evidence of systematic bias in the Company's assay results.
- The consultants conclude that the project uses well conceived and documented standard operating procedures (SOPs) for marking and sawing core, and for selecting the half-core samples sent for analysis.
- The Company will now resume normal reporting of assay results.
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Mo Srivastava summarizes his findings as follows: “The field duplicate data from Queensway confirm that the very high natural in-situ variability creates potential for large differences in field duplicates in drill hole intervals with abundant visible gold. Although there are several intervals with striking differences, both positive and negative, these represent only a few percent of the several hundred field duplicates now available. A statistical comparison of all duplicate and original sample pairs, including the most variable, supports the view that the assays are accurate; the sampling procedures at site, and the preparation and analysis procedures at the lab, have not imparted any systematic bias to the reported gold grades.” -
Lynda Bloom ofAnalytical Solutions Ltd. summarizes her findings as follows: “Our rigorous review of the NFG assay quality control data did not identify any systematic accuracy or contamination issues at either ALS or EA. Over 12,000 samples have been assayed by the expensive screened metallic fire assay method on at least 3 kg of a half-core sample, demonstrating management’s efforts to manage sub-sampling issues inherent with high grade gold deposits. Throughout the extensive database there are examples of rare events where duplicate assays of the fine fraction or splits of the crushed sample may differ by a factor of five or more. So, it is not surprising to see the same kind of variation when comparing two halves of the core where we know that geological complexity will always confound our ability to reproduce assays. The variability seen in the re-assays of the second half of the core is within an expected range for the style of mineralization. The ongoing routine collection of core duplicates will add confidence in the assays and our understanding of the gold distribution.”
SUMMARY DISCUSSION
The following summary discussion was provided by the Company’s independent consultants.
Key Items of Note:
- High natural variability in Queensway’s most strongly mineralized zones leads, in places, to large changes in gold grades over short distances: adjacent samples can have different grades, as can the two halves of core within a single sample interval.
- As shown in Figure 1 below, there is generally good agreement between 475 original assays and the field duplicates from the other half of the core.
- The pink and orange dots mark the samples for which visible gold (VG) was noted during logging. Even when VG is present, the 2nd half of the core often produces a higher assay (above the X=Y line) than the original assay of the 1st half of the core. Of the 37 samples with abundant VG, the 2nd assay is higher for 17 and lower for 20. There has been no systematic bias that favours the visibly higher-grade half being chosen for original analysis.
- Table 1 lists sample intervals with original and duplicate assays above 1 g/t that had large relative differences: the ten highest (above the X=Y line) and the ten lowest (below the X=Y line). The sample intervals with the largest inconsistencies between the assays of each half of the core are often those where the exact location of the original sample was unclear in the core box; this creates the possibility that the material collected for the duplicate sample might overlap into an adjacent interval. Most of the intervals listed in Table 1 had soft or rubbly core that is difficult to cut in the way that the SOPs recommend.
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The factors that contribute to uncertainty in the half-core duplicate are present in all but five of the 20 most inconsistent intervals listed in Table 1. In two of these, the duplicate is higher; in the other three, the duplicate is lower. With almost 500 original and duplicate pairs now reported, this represents about
1% of the available data.
Monte Carlo Simulation
A Monte Carlo simulation study was used by
QA/QC Review
A thorough review of laboratory procedures, laboratory and company internal QC samples and check assays was completed by
- The results for standards and blanks meet industry standard quality control expectations for both laboratories, EA and ALS.
- Check assays exchanged between laboratories had acceptable correspondence.
- The internal pulp and preparation duplicates had acceptable correspondence in both laboratories.
Qualified Person
The technical content disclosed in this press release was reviewed and approved by
About
New Found holds a
Please see the Company’s website at www.newfoundgold.ca and the Company’s SEDAR profile at www.sedar.com.
Acknowledgements
New Found acknowledges the financial support of the
Contact
To contact the Company, please visit the Company’s website, www.newfoundgold.ca and make your request through our investor inquiry form. Our management has a pledge to be in touch with any investor inquiries within 24 hours.
Neither the
Forward-Looking Statement Cautions
This press release contains certain "forward-looking statements" within the meaning of Canadian securities legislation, relating to assay results, exploration and drilling on the Company’s Queensway gold project in
View source version on businesswire.com: https://www.businesswire.com/news/home/20220223005583/en/
Per: "Craig Roberts"
croberts@newfoundgold.ca
+1 (910) 406-2407
Source:
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