Expression of Interest for infill flying near Broken Hill

The Geological Survey of New South Wales (GSNSW) and Geoscience Australia (GA) welcome Expressions of Interest (EOI) for flying infill lines within a regional airborne electromagnetic (AEM) survey in Western NSW.

Expressions of interest close at C.O.B. on Friday 28 August 2020.

When and where?

The survey will be flown during November 2020, with final data delivered in the first half of 2021. The survey area will be northwest of Broken Hill, over the Mundi Mundi Plain, and is shown in the map below.

Email for a shapefile of the survey area.

Why an AEM survey?

The survey will assist in basement geology interpretation, also identifying the thickness of younger cover sequences and potential groundwater resources.

Why survey in this area?

This is the second in a series of GSNSW AEM data collection projects as part of its commitment to MinEx CRC. MinEx CRC is a nation-wide program that will lead to better understanding of the geology in under-cover areas and support exploration for mineral deposits up to 500 m beneath Earth’s surface. GSNSW will undertake geological mapping, geophysical and geochemical data acquisition and drilling programs in five Mineral Allocation Areas in the state’s central and far west from 2019 to 2028. Drilling is planned between 2022 to 2026.

What are the survey parameters?

The AEM survey will be flown east‒west at 2.5 km and 5 km line spacing. Flight lines will avoid towns and buildings and be correlated with existing water monitoring boreholes and mineral drillholes to aid interpretation. The exact AEM system to be used will be finalised during the tender process for the Mundi AEM Survey.

Map of Broken Hill and Mundi Mundi Plain

Map showing Mundi Mineral Allocation Area and proposed AEM survey area. Background is a greyscale first vertical derivative of total magnetic intensity image.

How can you be involved?

EOIs to privately fund infill flying are currently being sought. The minimum infill area size is 5 km by 5 km and lines must be oriented east‒west. The area must be within or adjacent to the Mundi AEM Survey regional boundaries.
Interested parties need to register their interest with GSNSW.

Why should you get on board?

Parties can take advantage of a reduced line-kilometre price that includes aircraft mobilisation. GSNSW will undertake community consultation and arrange permits. GA will handle contracting, data QA\QC and delivery and specialist data processing. Other benefits of flying infill lines include:

  • AEM line data that meet quality requirements of GA and GSNSW
  • regional AEM survey to provide context for your infill-line data
  • best practice conductivity‒depth images produced by GA
  • logistics report
  • one-year confidentiality from the government data public release date for privately funded infill lines

How do I apply?

Please submit a map or shapefile of the infill area and your desired line spacing to Expressions of interest close COB 28/08/20.

What is the administrative process?

Parties who submit EOIs deemed compatible with the Mundi AEM Survey will be invited to sign a Memorandum of Understanding (MOU) with GSNSW and GA. The MOU specifies that the infill data will remain confidential for the period of one year after the regional AEM data are publicly released. After the one-year confidentiality expires, the infill data will be publicly released by GSNSW and GA.

The regional component of the Mundi AEM Survey will be put out to tender by GA during July to August 2020 and a preferred AEM contractor will be selected. GA and the AEM contractor will then enter into a contract that allows for infill flying to occur. GSNSW will provide the AEM contractor with a list of all EOI parties who have signed an MOU. The contractor and the EOI party will then negotiate directly about the infill flying, line-kilometre rate and payment. EOI parties can then decide if they wish to proceed with the infill flying.

How will I know if my EOI has been accepted?

You will receive an email confirming receipt of your EOI within five working days of submission. Following closure of the EOI process and assessment of all EOIs, you will receive and email advising acceptance of rejection of your EOI and providing further instructions regarding the MOU, if accepted.

Where can I find out more?