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Gold Undercover: Science - Project Summaries
Data Capture and Analysis
Exploration Toolkit
Gold Resource Assessment
3D Models and Management
Data Capture and Analysis
| Seismic Line Extension |
Project contact
Peter O’Shea
Project Summary
Determine, using reflection seismic, the geometry and nature of key faults bounding basement zones, the internal structure of the basement zones, and the relationship of major gold deposits to major regional structures in central Victoria.
Data was collected as part of the pmd*CRC T13 seismic project.
Products
The seismic reflection profiles and data were interpreted during 2007 and presented at a workshop in Feb 2008 to industry and academia. The interpreted profile is available on DVD from GSV on request. GSV is collaborating with Geoscience Australia in the preparation of two research papers which have been submitted to Economic Geology and the Australian Journal of Earth Sciences for publication.
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| Drill hole Database |
Project contact
Paul McDonald
Project Summary
The ERD drill hole database is the State’s official central depot for data and information on holes drilled for a range of purposes. The accuracy and availability of these data facilitates minerals/petroleum exploration and mining/extraction companies to make informed business decisions. Thus, it is imperative that the database is of high quality standard and up to date.
This project is capturing and validating new open file gold drill hole data, as well as updating and revalidating existing open file gold drill hole data within the GU area. The accessibility of these data can assist explorers determine the extent of previous work and improve their interpretation capabilities.
Products
Updated corporate databases and delivery improved to international standards by August 2009.
Depth to basement maps and associated report by August 2009.
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| Gravity Survey |
Project contact
Paul McDonald
Project Summary
Increased gravity data density across strike between the Mount William and Avoca Faults shows Cainozoic movements on Palaeozoic faults and pre-Cainozoic topographic highs. The faults were possible conduits for gold mineralisation and the topographic highs are possible sites of silicification/gold mineralisation.
This project collected 8050 new gravity stations at 500 m spacing across strike in the most prospective covered area in Victoria (between Avoca and Mt Williams Faults).
Products
Gold Undercover Report 7 - Bendigo-Mitiamo gravity survey is now available for free download in the Online Store.
Gold Undercover Report 11 - The northern Bendigo Zone: interpretation of the Bendigo-Mitiamo gravity survey, including depths to basement is now available for free download in the Online Store. |
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| Geochemistry Database |
Project contact
Paul McDonald
Project Summary
The ERD geochemistry database is the State’s official central depot for data and information collected from open file exploration reports. The accuracy and easy access to these data facilitates minerals exploration and mining/extraction companies to make informed business decisions. Thus, it is imperative that the database is kept current and of high quality standard.
This project will re-engineer ERD’s geochemistry database and produce geochemical anomaly maps for the GU area.
Products
Updated corporate databases and delivery improved to international standards by August 2009.
Gold Undercover report 20 - Compilation of open-file surface geochemical data from the Bendigo 1:250 000 map sheet and adjacent areas, Victoria is now available for free download in the Online Store. |
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| MT Geophysical Survey |
Project contact
Peter O’Shea
Project Summary
Capture magnetotellurics (MT) over the route of the T13 reflection seismic line and on a parallel line to the north, in order to improve the development of a 3D model which will allow explorers to better target prospective areas for mineralisation under cover.
Products
Gold Undercover Report 8 - A magnetotelluric survey along part of the 2006 central Victorian seismic transect is now available for free download in the Online Store.
Gold Undercover Report 18 - A magnetotelluric survey to the north of the 2006 central Victorian seismic transect: final report is now available for free download in the Online Store. |
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| Helicopter-borne Versatile Time Domain Electromagnetic System (VTEM) |
Project contact
Paul McDonald
Project Summary
The Department of Primary Industries contracted Geotech Airborne Pty Ltd to acquire Helicopter-borne Versatile Time Domain Electromagnetic System (VTEM) data along four traverses which are coincident with a deep seismic reflection profile that DPI conducted in June 2006.
The VTEM data were collected in April 2007 and totalled 381 line kilometres.
The aims of the survey were to;
- Map and characterise the conductivity responses of the geology
- Determine the depth to basement
- Map and characterise the conductivity response of possible saline ground waters
- Determine the suitability (eg. depth penetration) of the VTEM system for use in Victoria
Products
Gold Undercover Report 9 - A Versatile Time Domain Electromagnetic (VTEM) survey along the 2006 central Victorian seismic transect is now available for free download or to purchase on CD with the accompanying VTEM data in the Online Store. | |
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Exploration Toolkit
| Hylogger Analysis |
Project contact
Paul McDonald
Project Summary
Capture SWIR spectra and digital photographs of selected drill core and chips, in GSV custody, with CSIRO HyLogger equipment to determine if diagnostic alteration related to mineralisation is present.
The data and interpretation provided input into the Gold Undercover Lithogeochemistry project.
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| Deposit Models |
Project contact
Peter O’Shea
Project Summary
Desk-top study to assess all possible gold deposit “styles” for Victoria (ie. Carlin, VHMS, epithermal, porphyry, etc) against Victoria's geology & tectonic setting and determine the distribution for each deposit “style” within the GU area.
Products
Report describing key geological, geochemical, geophysical, mineralogical, features of gold deposit “styles” and new layer in GeoVic showing distribution of deposit types.
Gold Undercover Report 1 - Classifying gold-bearing deposits in central and western Victoria is now available for free download in the Online Store. |
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| Exploration Models |
Project contact
Paul McDonald
Project Summary
Desk-top study to compile exploration strategies and techniques that work for each gold deposit “style” which will permit optimisation of exploration dollars, reduce exploration risk and encourage ground turnover.
Products
Gold Undercover Report 3 - Suggested exploration methods for covered gold-bearing deposits in central and western Victoria is now available for free download in the Online Store. |
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| Geochronology Study |
Project contact
Peter O’Shea
Project Summary
Document current gold deposit and regional geochronology data for GU area and acquire new data where required. This is an essential tool for understanding mineralising events and underpins new predictive mineralisation modelling techniques.
Products
Gold Undercover Report 6 - Geochronology of gold deposits in the western Lachlan Fold Belt, Victoria: A review is now available for free download in the Online Store.
Gold Undercover Report 12 - GU Report 12 - New 40Ar39Ar geochronology of gold mineralisation in central Victoria: interim report is now available for free download in the Online Store.
Gold Undercover Report 15 - Preliminary report: fluid inclusion noble gas and halogen signature of gold deposits in the western Lachlan Fold Belt, central Victoria is now available for free download in the Online Store.
Gold Undercover Report 19 - New 40Ar/39Ar geochronology of gold deposits in central Victoria: final report is now available for free download in the Online Store. |
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| Lithogeochemistry Study |
Project contact
Peter O’Shea
Project Summary
Define and characterise primary and secondary alteration halos around key Vic gold deposits to produce geochemical and mineralogical vectors for explorers, increase footprint size of deposits, and aid in optimising sample spacing. Compile density determinations for major Victorian rock types.
Products
Gold Undercover Report 4 - Lithogeochemical haloes surrounding central Victorian gold deposits: Part 1 - Primary alteration is now available for free download in the Online Store.
Gold Undercover Report 5 - Compilation of rock densities for Victoria, 2007 is now available for free download in the Online Store. The report describes densities for key Victorian rock units, presented by rock type, structural zones and formations/suites.
Gold Undercover Report 10 - Exploration for deeply buried gold deposits in northern Victoria: soil, regolith and groundwater geochemistry of the Lockington and Lockington East gold deposits is now available for free download in the Online Store.
Gold Undercover Report 16 - Lithogeochemical haloes surrounding central Victorian gold deposits: Part 2 – Secondary dispersion is now available for free download in the Online Store. |
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| Hydrogeochemistry - Exploration for minerals undercover |
Project contact
Paul McDonald
Project Summary
This project involved the reinterpretation of existing CSIRO hydrogeochemical data to provide additional exploration information to assist in the discovery of mineral deposits under cover.
Product
Gold Undercover Report 14 - Hydrogeochemistry of groundwaters associated with orogenic gold deposits in central Victoria is now available for free download in the Online Store. |
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Gold Resource Assessment
Project contact
Paul McDonald
Project Summary
Conduct a probabilistic quantitative assessment of the potential gold endowment of the Gold Undercover area.
Product
Gold Undercover Report 2 - Assessment of undiscovered mesozonal orogenic gold endowment under cover in the northern part of the Bendigo Zone is now available for free download in the Online Store.
Gold Undercover Report 13 - Assessment of undiscovered mesozonal orogenic gold endowment under cover in the northern part of the Stawell Zone (Victoria) is now available for free download in the Online Store.
Gold Undercover Report 17 - Assessment of undiscovered gold endowment under cover in the northern part of the Melbourne Zone (Victoria) is due October 2009. |
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3D Models and Management
| 3D model capability framework |
Project contact
Linda Bibby
Project Summary
The 3D Model Management System provides a framework to build, store, maintain and deliver 3D models. The project developed data standards, established integration with corporate databases, provided appropriate applications and documented workflows.
The schematic below shows the components of the framework.
Products
The 3D Model Management System was delivered in December 2008.
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