NDI Campaign 3: Delamerian Orogen

WANT TO KNOW MORE?

For further information on the Delamerian Orogen NDI Campaign, please see the Geological Survey of South Australia website.

WHAT IS THE NATIONAL DRILLING INITIATIVE?

The National Drilling Initiative (NDI) will manage and deliver drilling programs in multiple case study areas proposed by MinEx CRC’s partner geological survey organisations. The NDI vision is to drill multiple holes in a region to map the regional geology and architecture and define the potential for mineral systems in 3D. A range of drilling methods may be used however it is intended that the NDI will take advantage of new low-cost Coiled Tubing (CT) drilling technology and associated sensing, in order to the minimise environmental footprint and maximise the number of drill holes and the volume of data collected.

The National Drilling Initiative is not an exploration program itself, rather it seeks to provide new evidence about the existence of mineralising systems for exploration companies to then come in and take up the search. It is a necessary action by the Government to lower the risk for explorers to come into previously unexplored areas. Without this pre-competitive work, explorers will invest their money elsewhere, probably outside of Australia.

 

WHO IS INVOLVED IN CAMPAIGN 3: DELAMERIAN OROGEN?

MinEx CRC is conducting the drilling program in collaboration with the Geological Survey of South Australia as part of a long-running precompetitive geoscience program.

 

WHERE IS THE  DELAMERIAN OROGEN PROJECT AREA?

The Cambrian-Ordovician Delamerian Orogen is an arcuate orogenic belt with a strike length of approximately 15,000 km, encompassing eastern South Australia, western New South Wales, western Victoria and central and western Tasmania. It preserves the remnant of an accretionary plate margin formed along the eastern margin of the proto-Australian continent when it was part of the supercontinent Gondwana. The basement to the Murray Basin in South Australia is arguably the most poorly understood element of the Delamerian Orogen, flanked to the west by deformed Neoproterozoic-Middle Cambrian sedimentary rocks of the Adelaide Fold Belt, and to the east by volcanic arcs of the Grampians Stavely Zone in Victoria, and the Koonenberry and Loch Lily-Kars belt in NSW.

While the cover succession of the Murray Basin continues to be the target of exploration for heavy mineral sands, exploration for base and precious metals within the Delamerian basement has until now been almost solely focused along the western margin of the Murray Basin. This project will provide new constraints on the geological setting, deformational history, thickness of cover and prospective mineral systems of the basement beneath the Murray Basin.

 

WHEN WILL THE DRILLING CAMPAIGN TAKE PLACE?

2021.

 

WHAT DOES THE  DELAMERIAN OROGEN PROJECT HOPE TO ACHIEVE?

To stimulate mineral exploration beneath cover of the Murray Basin by providing industry with new data and new constraints on the geological framework and mineral prospectivity in this greenfields region

 

MAP

Click here for a map of the region.

 

CONTACT

Drilling Program:

Data Release:

Media:

 

General enquiries:

comms@minexcrc.com.au

 

MINEX CRC PROJECTS SUPPORTING THE NDI

In addition to drilling campaigns, MinEx CRC is undertaking the following three Projects to support the NDI.

Project 7: Maximising the Value of Data and Drilling Through Cover
The NDI will generate a vast amount of new data and add value to existing data. These data will need to be appropriately managed throughout the life of the MinEx CRC to maximise the value from the NDI. Current methods for managing drilling data require multiple software packages and data delivery systems and are generally undertaken after the completion of the program.

A streamlined approach to managing and integrating the many layers of complex drilling data will allow new methods such as machine learning to provide an objective analysis of the data, and will also result in significant efficiency gains including the ability to modify drilling programs in real-time. In contrast, the drilling rig and staff are in the field. Project 7 aims to deliver a single point of access to NDI drilling data for all stakeholders, which will be a data management and delivery system with in-built geospatial and data analytical tools and drill target optimisation algorithms.

 

Project 8: Geological Architecture and Evolution
Project 8 aims to provide new geoscience data and knowledge in the NDI case study areas via integration of geophysics and petrophysics, regolith and hydrogeology, alteration signatures, basin analysis, and igneous and metamorphic analysis. This project works closely with the NDI drilling to help re-assess what is known about the geology of each area before drilling and to identify gaps in our knowledge and develop a sampling rationale for the drilling program. After completion of the drilling, the new data will aid in the construction of 3D geological models and 4D reconstructions of the geological evolution of the case study areas and aid in the identification of known and potential mineral systems within. Project 8 will provide advice to assist program design for future drilling in covered terranes, including within the NDI case study areas.

 

Project 9: Targeting Mineral Systems in Covered Terranes
Project 9 is about the application of Mineral Systems thinking particularly in the NDI drilling areas, but also at the continental scale. Mineral Systems analysis is genetic a way of looking at how and why ore deposits form, and it provides a predictive ability of where we might find new undiscovered deposits mainly buried beneath cover rocks. In Project 9 we are going to focus on the key features necessary for forming any ore deposit, including the key geological inputs of metal and fluid sources, energy drivers, a pathway for the large amounts of fluid needed to carry the metals, the conditions of deposition, and of preservation.

 

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