Surface Geochemical Sampling

Soil Sampling

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Systematic, multi-scale ‘C horizon’ soil sampling has proven an effective primary tool for deposit discovery in the Yukon. Significant modern discoveries such as Kinross’ Golden Saddle, Kaminak’s Coffee Deposit and Comstock’s QV discovery have all been delineated on Soil Anomalies collected by the GroundTruth team.

Since 2010, GroundTruth has collected 320,000 soil samples (>10,000 field man days) in the Yukon. Our foremen and crews possess unmatched experience in ensuring surveys of any size are conducted with maximum quality and efficiency.

Our sample collection procedure is 100% standardized, ensuring consistent data. Sample recording is done digitally in the field, with handhelds on custom forms equipped with barcode scanners. Data is downloaded and monitored by foreman on a nightly basis. Remote camps are equipped with internet to relay data on a daily basis.

We place great effort on preplanning our surveys to maximize efficiency. We camp onsite when possible, a 5 person camp can be slung onsite in one astar sling load + 1 internal. Our traverse length is standardized, making our production and cost extremely predictable.

 

Ridge and Spur/Contour Soil Sampling:

  • Surveys designed to identify regional targets
  • Ideal for a first pass on under-explored regions
  • Target sample density is 20 samples/km²
  • Typical spacing is 50m to 100m along the traverse

Grid Sampling:

  • Surveys are designed to outline the surface extent of deposits
  • Ideal for a first pass on under-explored regions
  • Typical grids are 50m sample x 100m line spacing for Au targets
  • Sample density on 50x100m grid soil program is 200 samples/km²
  • Grids can be customized by the client to any line and sample spacing

 

 

Data Collection

Sample Collection protocol is fully standardized and monitored to provide a consistent product: Sample-to-Sample, Year-to-Year.

Samples are monitored, from field to lab, via barcode Ids

Sample database is reviewed and backed up daily.

 

All samples include:

  • Detailed description of the sample and the sample site.
  • Geotagged Photos of the sample and the sample site
  • GPS position of every sample
  • Assurance of highest quality sample possible

Data Deliverables:

  • Sample Location/Description database (.csv) and summary
  • QAQC samples database: field duplicates, reference samples (.csv)
  • Database of Georeferenced photos, hyperlink points for GIS. (.csv)
  • Map of Plotted Sample Locations

 

Backpack Drill Soil Sampling

GroundTruth has developed a lightweight (40lb), high powered auger drilling system mounted on a backpack for soil sampling in winter and permafrost conditions. The system easily portable by one technician, drills to a consistent depth of 80cm with auger, and uses a coring extraction bit to collect sample. Extensive winter sampling programs have been successfully conducted with this unit.

Till Sampling

Sampling of glacial till provides valuable information to vector exploration efforts towards buried mineralized systems and fast tracking the discovery process.  Glacial till is unsorted sedimentary material derived directly from glacial processes.  In simple terms till is formed when a glacier erodes the bedrock (via abrasion, plucking) as it slides across the land surface.

The material collected by the glacier often includes a poorly sorted mixture of ground rock ranging from clay, silt, sand, pebbles and boulders.  Till is deposited directly by the glacier as the glacier melts. Samples are collected preferentially from sites known as Frost Boils.  These features occur in the permafrost environment due to a freeze-thaw mixing/churning process known as cryoturbation.  Frost boils often contain material from deeper within the till cover and provide an excellent composite of the till cover sequence.

In the past 2 years GroundTruth Exploration has collected over 10,000 till samples.

Our sample collection procedure is 100% standardized, ensuring consistent data. Sample recording is done digitally in the field, with handhelds on custom forms equipped with barcode scanners. Data is downloaded and monitored by foreman on a nightly basis.

 

Data Collection

Sample Collection protocol is fully standardized and monitored to provide a consistent product: Sample-to-Sample, Year-to-Year.

Samples are monitored, from field to lab, via barcode Ids

Sample database is reviewed and backed up daily.

 

All samples include:

  • Detailed description of the sample and the sample site.
  • Geotagged Photos of the sample and the sample site
  • GPS position of every sample
  • Assurance of highest quality sample possible

Data Deliverables

  • Sample Location/Description database (.csv) and summary
  • QAQC samples database: field duplicates, reference samples (.csv)
  • Database of Georeferenced photos, hyperlink points for GIS. (.csv)
  • Map of Plotted Sample Locations

 

Field Portable XRF

GT provides benchtop XRF analysis of soil samples using Innovx X-5000 unit. XRF can be used as a screening tool for results ahead of the lab to direct exploration programs, or as cost saving measure to replace conventional ICP-MS Analysis. 200 samples can be analyzed in one 8 hour shift, providing analysis results at ~1/5th the cost of the lab.