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Alien Metals commences airborne magnetic survey

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Global Mining Review,

Alien Metals Ltd, a minerals exploration and development company, has advised that further to the announcement on 14 December 2020, an airborne magnetic survey has started over the Elizabeth Hill Project in Western Australia.

The project not only covers the original Mining Licence M47/342 which hosts the Elizabeth Hill Silver Mine and associated prospects, but also exploration permit ELA47/4422, which the company has conditionally acquired and will be referred to as the Munni Munni North tenement going forward, a name used for part of this area in the past.


  • Aeromagnetic survey will aid in tying in all existing prospects and historical data to assist in prioritising numerous existing targets.
  • Potential for new targets to be defined from geophysical survey.
  • Collation of the airborne surveys, geological interpretations and geochemical results, will drive new target generation across Munni Munni North.

Alien have engaged Southern Geoscience Consultants (SGC) of Perth, Western Australia, to provide and manage the acquisition, processing and interpretation of airborne magnetic, radiometric and digital elevation data over the Elizabeth Hill Project. From a detailed review of existing available data, it was decided to only fly the eastern section of the project area as the western area was recently flown at the same line spacing and line direction with that data available to purchase at less than the cost of re-flying it. SGC have confirmed that they can integrate both data sets into one larger unit that they can then interpret as a single area.

Bill Brodie Good, CEO and Technical Director of Alien Metals, commented: "The company is extremely pleased that we can announce the commencement of this programme as it will add invaluable overall new interpretation to the entire project area and allow us to incorporate various historic results with this new data.

“We are delighted to get this work underway at this time so over the coming weeks while field work is much more limited due to the cyclone season in the region the team can keep working in the background.

“Once we have the results and interpretations, we can start developing priority targets to follow up in the field alongside the already planned trenching within the Mining Licence.

“The company is excited about the potential to add significant value to the project and developing next stage exploration from the outcome and looks forward to updating the market of progress in due course."

Thomson Airborne Pty Ltd of New South Wales are carrying out the acquisition work and are due to commence today using a Cessna 210 fixed wing aircraft. They will be flying at 1534 line km to cover the survey area at 50 m spaced east west lines with north south 'tie' lines.

Once this data has been collected and verified SGC will integrate it with the existing high quality data for the western area that is already flown and then complete a geological and structural interpretation based on 1:25 000 scale.

Processing of the new data would entail survey planning and contractor communication, gridding and levelling (if required) of the magnetic, radiometric and digital terrain data and grid filtering, image processing and enhancement (TMI, TMI1VD, Analytic Signal, RTP, RTP1VD, RTP2VD, RTPTilt, ASVI, DEM, TC, K, U, Th) using a relevant sun angle of this data. Along with this work, SGC will also re-process and merge the existing multi-client survey dataset to make one large dataset for interpretation.

A comprehensive interpretation of the aeromagnetic data would integrate all relevant geoscientific information, allowing for the mapping of lithologies and structure. The regional aeromagnetic data would be referred to, if required, to assist in understanding any broader scale features beyond the tenement area.

As indicated above, the airborne data capture is underway and based on a successful and timely completion, the company plans to have the final results and interpretations mid to late February 2021 to be able to start planning the follow up field work going into the optimal field season in the region.

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