Drilling is the most expensive way to answer a simple question: Is there anything down there?
A single deep hole can run into hundreds of thousands of dollars, and a poorly targeted exploration program can burn through a junior explorer’s budget without ever confirming the mineralisation everyone suspected was there.
Companies that consistently drill smarter — not just more — tend to share one habit: they send a geophysics team in first.
Founded in 2008, Fender Geophysics is an Australian-owned geophysical consulting firm that has built its business helping exploration and mining companies where to drill before a single metre of core comes out of the ground.
The right tool for every exploration challenge
What distinguishes Fender Geophysics from a narrower survey contractor is the breadth of its method set. The company offers induced polarisation (IP) and resistivity surveys, electromagnetics, microgravity, ground magnetics, seismic, magnetotellurics, portable X-ray fluorescence, and ground penetrating radar — all under one technical team.
According to founder and managing director Andrew Sloot, that breadth was deliberate from the outset:
“Our highly professional and qualified team provides confidence to our clients that we will provide the best solution for them.”
The practical value of covering multiple techniques becomes clear in how Fender approaches a typical sulphide target.
IP measures chargeability — the capacity of rock and soil to hold an electrical charge after a current is switched off — and is a well-established method for detecting gold, silver, and copper associated with sulphide mineralisation.
Electromagnetics targets the same style of deposit but typically delivers better vertical resolution. Running both in combination — rather than defaulting to whichever instrument a contractor happens to own — gives explorers a more complete picture of what is chargeable, what is resistive, and where the two overlap.
Fender operates its own electromagnetic systems, including Monex Geoscope’s TerraTem and Terra Tx50 TDEM equipment, configurable for moving loop, fixed loop, and downhole surveys. Owning rather than leasing this equipment matters for explorers on tight schedules, since availability does not depend on third-parties.
Turning drill targets into decisions
Fender’s 2021 survey for Dart Mining (ASX:DTM) at the Granite Flat Project, roughly 60km south-east of Albury-Wodonga in Victoria, is a useful illustration of how the multi-technique approach translates into a drilling decision.
Dart Mining had already recorded numerous long drill intersections of ‘low-grade’ copper-gold mineralisation in altered granitic rock. The company needed to know whether that mineralisation extended into a larger, economically significant porphyry system.
Fender ran six 2.4km-long IP and magnetotelluric profiles across the project using a distributed acquisition system that collected dipole-dipole IP data during the day and magnetotelluric data overnight, when conditions typically favour that method.
The results identified high chargeability anomalies coincident with suppressed resistivity, a pattern consistent with porphyry-style disseminated sulphide mineralisation, at depths between 200m and 400m below the surface. Magnetotelluric imaging extended interpretation down to 1,100m.
Dart Mining chairman James Chirnside described the results as “the company’s most significant results to date”, noting the survey had identified several new copper-gold targets that became the company’s primary focus for further drilling.
That kind of outcome — converting an ambiguous geological hypothesis into a defined, fundable drilling target — is the core commercial argument for geophysics ahead of a drill program.
A track record beyond Australia
Fender’s project history spans urban and remote sites across Australia, along with international work in Fiji, Peru, Papua New Guinea, and Russia. That geographic range matters for explorers assessing whether a geophysics contractor can operate reliably outside familiar terrain and under varying regulatory regimes and logistical constraints.
The company also maintains a formal safety culture with a training and induction program accredited by the Ground Geophysical Survey Safety Association (GGSSA). It also prioritises stakeholder engagement with landholders and Indigenous communities, which is increasingly critical to the smooth progress of exploration programs in regional Australia.
Geophysics for groundwater, environmental, and infrastructure
While mineral exploration is a core part of Fender’s business, the company’s near-surface techniques extend into groundwater assessment, environmental site investigation, geotechnical and infrastructure surveys, and desktop studies combining new and historical geophysical datasets.
The same instruments used to detect sulphide mineralisation at depth can locate buried infrastructure a few metres below the surface or characterise soil salinity. This versatility gives Fender’s clients a wider range of applications — and a broader commercial footprint than mining alone.
Should you drill on a hypothesis or wait for a defined target? Fender Geophysics provides a data-driven answer — before the rig mobilises. Its technical breadth, owned equipment, and a multi-decade track record give exploration and mining companies the confidence to make that call.
Image Credit: fendergeophysics.com.au
