GUIDELINES TO ASSESSING JORC COMPLIANCE REPORT (ORE RESERVE AND MINERAL RESOURCES) - SAMPLING TECHNIQUE AND DATA

(Adapted from The JORC Code 2012 Edition, Australasian Code of Reporting Exploration Results, Mineral Resources and Ore Reserve; download JORC Code Template)

The Joint Ore Reserve Committee (JORC) in their description of reporting exploration results recommend these generic assessment criteria that investors can use to determine the integrity of a JORC Compliance report.

There are four key areas highlighted in the assessment criteria that investors should observe. These are:
  1. Sampling Technique and data
  2. Reporting of Exploration Data
  3. Estimation and reporting of Mineral Resources
  4. Estimation and reporting of Ore Reserve


1. Sampling Technique and data

  • Sampling technique
The sampling methods used must be explicitly defined with detials of sampling procedure including equipment/tools used.  Certian industry standards and varying sampling methods may be inherited however the emphasis is on the nature and quality of the sampling techniques employed and measures taken to ensure sample representivity

  • Drilling Techniques  & Drill Sample Recovery
In addition to sampling techniques, the  drill type used and details may be necessary. This includes but not limited to core recovery, handling, biaseness and measures used to optimise representativity of samples.

  • Logging
The report should indicate whether core and chip samples have been geologically and geotechnically logged, the qualitative/quantitative nature of the logs and the total length and percentage intersection.


  • Sub-sampling technique and sample preparation
It is necessary to note if core, whether cut or sawn and whether quarter, half or all core taken. For all sample types, note the nature, quality and appropriateness of the sample preparation technique. The quality control procedures adopted should also be noted for all sub-sampling stages to maximise representivity of samples. It is equally necessary to note measures taken to ensure that the sampling is representative of the in-situ materials collected, including for instance results for field duplicate/second-half sampling.


  • Quality of assay data and laboratory test
Note the quality of assay data and laboratory tests, the nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total.


  • Verification of Sampling and assaying
It is important to note the verification of significant intersections by either independent or alternative company personnel. Assess documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols and discussion on any adjustment to assay data.


  • Location of data points
Note the location, accuracy and quality of surveys used to locate drill holes, trenches, mine workings and other locations used in Mineral Resource estimation and the survey grid and geodetic reference.


  • Data spacing and distribution
Note the data spacing for reporting of Exploration Results as to whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied and whether sample compositing has been applied. The spacing used should be able to compliment the confidence level established.


  • Orientation of Data in relation to geological structures
It is vital to note the orientation of data in relation to geological structure and whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known.


  • Sample security, Audits and Reviews
It is necessary to note the measures taken to ensure sample security and the results of any audits or reviews of sampling techniques and data.

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GUIDELINES TO ASSESSING JORC COMPLIANCE REPORT (ORE RESERVE AND MINERAL RESOURCES) - SAMPLING TECHNIQUE AND DATA GUIDELINES TO ASSESSING JORC COMPLIANCE REPORT (ORE RESERVE AND MINERAL RESOURCES) - SAMPLING TECHNIQUE AND DATA Reviewed by CEDRICK KAU on January 15, 2018 Rating: 5

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