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HyLogger

HyLogger Data - Now Available on SARIG

read below for more details and instructions...

Introduction

The HyLogger core scanner is a new, rapid spectroscopic core and chip logging and imaging system developed by CSIRO's Mineral Mapping Technologies Group.

PIRSA successfully trailed the HyLogger technology in May 2002 and since then, has worked with Geoscience Australia (GA) and the Cooperative Research Centre for Landscape Environments and Mineral Exploration (CRC-LEME) to scan core held in the PIRSA Drill Core Storage Facility.

In 2003, a three-month campaign logged over 50,000 metres of core and in 2004-2005 another 25,000 metres were completed.

 

The Technology

The new system uses automated core tray handling, continuous visible and infrared spectroscopy, and digital imaging, to characterise and identify dominant mineral species on core, chips and pulps, at spatial resolutions of ~1cm (spectral data) and ~0.1mm (image data).

The system can log up to 1000 metres of core per day and several thousand metres of drill chips. Mineralogy is pre-interpreted using specialised identification software trained on a selected suite of minerals showing characteristic absorption features within the measured spectral range.

 

Hylogger on SARIG

Hylogger drillhole data is now available via SARIG, the South Australian Resources Information Geoserver.

Customers now have the ability to view and interrogate a specific HyLogger data layer allowing them to view complete core details of each hole.

In Addition, SARIG also offers .pdf core scan results for selected drillholes. These scan results can be saved directly to your computer for future reference and as more image files are compiled, they will be added to the layer. Some examples of the spectra and imagery can be viewed in the Emmie Bluff Case Study below.

As the diagram to the right indicates, the HyLogger data layer is located in the Map Data area of SARIG, under the Sampling and Drilling heading in the Layer Control panel. Red points indicate drillholes where image files are available where as for grey points, the images are currently unavailable.

  • Link directly to SARIG to access the Drillholes with Hylogger Data layer.
  • More information on SARIG

 

Image Examples and Current Catalogue

  • View the Scanned Core Inventory (last updated 17/09/04 - currently in review).
  • An Example of the HyLogger Technology can be found in the Emmie Bluff case study below

 

Case Study - Emmie Bluff

At the Emmie Bluff iron oxide copper-gold prospect, 470 km NW of Adelaide and 80 km SSE of the Olympic Dam Cu-U-Au deposit, the spectral mapping system was able to characterise a number of alteration zones enveloping the deeper, sub-economic Cu-Au mineralisation in basement. These consist of distal white mica phases showing decreasing aluminium content towards mineralisation, a zone of increased iron oxide content in the hangingwall to mineralisation, and a zone proximal and coincident to Cu-Au mineralisation that is enriched in chlorite with variable Mg / Fe chemistry. (Note: the upper mineralisation in Tapley Hill Formation was not scanned).

Review examples of the captured spectral data from the Emmie Bluff prospect here.

 

DH Number Hole Name Description Download .pdf file
165046 EB_SAE7 Emmie Bluff SAE7 150kb
165609 EB_SAE6 Emmie Bluff SAE6 280kb

 

The speed and objectivity offered by such a system, combined with assay data and visual log descriptions, provide tremendous scope to increase the returned value on expensive drilling programs. Early mapping of alteration zones, some often larger than previously detected, may provide more targeted and hence more cost effective drilling programs, as well as providing an early indication of geotechnical and/or metallurgical issues in an ore system**.

** Adapted from : - Huntington, J. et al., 2004. Automated mineralogical logging of core from the Emmie Bluff, iron oxide copper-gold prospect, South Australia. PACRIM 2004 Congress, Adelaide, SA, 19-22 September 2004, p 223-230, AusIMM Pub Series No 5/2004.

 

Further Information and Reading

For further information on the HyLogger program, please contact:

Dr Alan J Mauger (PIRSA)

Telephone: (08) 8463 3062

 Mr John L Keeling (PIRSA)

Telephone: (08) 8463 33135

 

Keeling, J., Mauger, A., Huntington, J., 2004. Spectral core logger update - preliminary results from the Barns gold prospect. MESA Journal 33, pp 32 - 36. (.pdf file ~ 2Mb)

 

HyLogger TM is a Registered Trademark of the CSIRO