HyLogging
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Hylogger™ drillhole data is available via the South Australian Resources Information Geoserver (SARIG). Specific HyLogger™ data layers can be viewed and interrogated, allowing the user to view complete core details of each hole. Core scan results (presented as .pdf) for selected drillholes can be saved directly to your computer for future reference. As more image files are compiled, they will be added to the layer. The HyLogger™ data layer can be accessed under the Drillholes layer in the Data Layer panel of SARIG. Some examples of the spectra and imagery found using the HyLogger™ Technology can be seen in the Emmie Bluff case study. |
Current catalogue
The Scanned Core Inventory (.ppt) was last updated 17 Sepetember 2004. The inventory is currently in review.
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.)
Examples of the captured spectral data from the Emmie Bluff prospect
|
DH Number |
Hole Name |
Description |
Download .pdf file |
|---|---|---|---|
| 165046 | Emmie Bluff SAE7 | EB_SAE7 | Emmie Bluff SAE7 (.pdf 50kb) |
| 165609 | Emmie Bluff SAE6 | EB_SAE6 | Emmie Bluff SAE6 (.pdf 80kb) |
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.)
About HyLogger™
The HyLogger™ core scanner (external site) is a rapid spectroscopic core and chip logging and imaging system developed by CSIRO's Mineral Mapping Technologies Group.
DMITRE's Mineral Resources Division successfully trialled the HyLogger™ technology in May 2002 and since then, has worked with Geoscience Australia (GA) (external site) and the Cooperative Research Centre for Landscape Environments (CRC-LEME) (external site) to scan core held in the DMITRE 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 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 TM is a Registered Trademark of the CSIRO
Further reading
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)
For more information contact:
Dr Alan J Mauger
Phone: +61 8 8463 3062
Mr John L Keeling
Phone: +61 8 8463 33135
- Page URL: http://www.minerals.pir.sa.gov.au/geological_survey_of_sa/data/hylogger
- Page Last Modified: March 30, 2012