Estrella Resources Limited (ASX: ESR) continues to identify areas prospective for nickel sulphides in its world-first time-domain Audio-Frequency-Magnetic (AFMAG) survey conducted at the company’s Carr Boyd Nickel Project, approximately 80km NNW of Kalgoorlie in Western Australia.
Leading survey technology group Expert Geophysics continue to process the data acquired at the Carr Boyd project in August 2023 and most recently have delivered a series of Resistivity Depth Imaging (RDI) sections throughout the survey area.
The AFMAG survey uses highly sensitive equipment to identify differentiation in electrical resistivity, seeking to identify anomalies which may indicate the potential for economic deposits of nickel sulphides.
The project’s highly prospective host rocks, namely the Carr Boyd pyroxenite and Colreavy komatiite, exhibit relatively low levels of resistivity when compared to other rock-types found within the project and the survey has successfully mapped the low-resistance areas in three dimensions.
The RDI sections are interpreted to reveal the project geology to a depth of around 600 metres below surface and provide greater detail on the orientation of the anomalies first identified through Expert Geophysics’ initial TargetEM survey.
Estrella is now able to interpret that the Colreavy komatitite appears to dip towards the east, while the Carr Boyd pyroxenite plunges vertically.
The RDI data will be used in conjunction with the previous seismic survey and current TargetEM bedrock anomalism to model the Carr Boyd intrusion’s internal basal contacts to prioritise drill-ready targets.
In another fantastic result following the introduction of Expert Geophysics to the Carr Boyd project, Estrella Resources has now gained further detailed information to develop precise drill targets to unlock further nickel sulphide deposits,” Managing Director Chris Daws said.
“The RDI data is a fantastic tool for exploration as the survey is capable of monitoring a greater range of electrical resistivities than any other time-domain system currently available in the market. This means we have industry-leading vision of our highly prospective host rocks.
“We are dealing with high levels of contrast between the low-resistance host rocks and other high-resistance rocks, such as granite, within the project. As a result, we can map the prospective rocks in three dimensions, with a strong degree of certainty.
“Further processing and refinement of the TargetEM and Audio-Frequency-Magnetic time-domain data is anticipated, but even this first batch of data is highly useful as we continue to map out the next stage of exploration at Carr Boyd.”
