Power Minerals Ltd (ASX:PNN) Identifies New Targets at Santa Anna Carbonatite Alkaline Complex
10 December 2025
Price Sensitive Announcement $
Highlights:
▪ Power has completed a drone aerial magnetic-digital elevation model (DEM) survey over the Santa Anna Carbonatite Alkaline Complex at its Niobium-REE Project in Brazil
▪ Power holds 100% of the complex through its acquisition of the Santa Anna Project. The complex spans ~2.5km, and nearly 90% of the surface area remains untested
▪ The survey aimed to provide details on the lateral and depth potential of the mineralised system
▪ Preliminary survey images revealed previously undetected structural features, enhancing geological understanding of the complex and highlighting at least two new target areas
▪ Results from this geophysical program will assist in targeting highgrade mineralisation in addition to the high-grade areas defined by previous drilling
▪ Geophysical data will support logistical planning for ongoing and future fieldwork, including upcoming drilling programs, as well as resource modelling
Overview:
Power Minerals Limited has announced it has identified new exploration targets from a recently completed airborne-drone geophysical survey over the Santa Anna Carbonatite Alkaline Complex at its Santa Anna Niobium-REE Project (the Project) in Brazil.
Power has completed a drone-supported aerial magnetic-DEM survey over the Santa Anna Project as the next step in its expedited exploration plans at the Project.
The survey was designed to provide details on the lateral and depth potential of the mineralised system.
Preliminary survey images have revealed previously undetected structural features, which further enhance the geological understanding of the complex.
Results from this geophysical program will assist in targeting new areas of high-grade mineralisation, in addition to the high-grade areas defined by previous and current drilling.
Power recently completed its acquisition of the Santa Anna Project (ASX Announcement dated 1 December 2025), which provided it with 100% ownership of the entire large Alkaline Carbonatite Complex, spanning ~2.5km from west to east
Santa Anna survey details
The survey was completed by Signal Geofísica Ltda, an experienced Brazilian geophysical contractor. Approximately 385.49 line-km of magnetic data has been surveyed in total, including control lines (perpendicular tie lines).
The magnetic data was collected with a sampling frequency of 10 Hz and a flight speed of 8m per second, providing a reading approximately every 0.8m. The acquisition lines had a spacing of 50m and will be oriented in the N-S direction, with the control lines perpendicular to these and oriented in the W-E direction with a spacing of 500m (10 times the distance of the survey line spacing).
The drone was flown at a height of 40m above the ground, with the sensor 30m above the ground (10m distance between sensor and drone), following the variations in terrain to always maintain a constant height.
A GEM Systems (Canada) GSMP 35U and 25U Magnetometer (Potassium Optical Pumped) magnetometer system were used, coupled to a DJI Matrice 350 RTK drone.
A highly accurate digital elevation model (DEM) survey was conducted using LiDAR and a RTK GPS system before the drone magnetic survey. This data will support logistical planning for ongoing and future fieldwork, as well as the ground surface on any resource modelling
Survey interpretation
Power’s team will complete the final interpretation on receiving the full digital data set from the survey. However, preliminary images show that the internal detail of the carbonatite alkaline complex can be observed, and new high-priority exploration target areas have been selected. The preliminary images also show linear features internal to the alkaline complex, which could be late stage structures that could concentrate movement of fluids.
Previous aerial geophysical data were restricted to regional surveys with very wide line spacing. The new preliminary exploration target areas are nearer the margin and were not identified in the previous data sets.
Carbonatites often contain elevated levels of magnetite making them appear as elevated magnetic anomalies. Consulting geophysics will model the likely source of the magnetic features and provide depth and orientation data to better target the planned extensive drilling.
These new target areas will be incorporated into Power’s upcoming drilling programs at Santa Anna.
Santa Anna exploration
Power completed a 29-hole (2,272m) reverse circulation (RC) drilling program as the core component of its due diligence. This drilling intersected broad zones of niobium and high-grade REE, and confirmed the presence of mineralisation both at surface (weathered zone) and at depth (fresh rock)1.
This drilling supported Power’s initial exploration model for the Project, and highlighted its expansion potential at depth and at surface. Nearly 90% of the surface area of the Alkaline Complex remains untested.
Based on these positive outcomes, Power commenced a shallow auger drilling program, which is ongoing, and aims to extend the mineralised footprint and highlight target areas for follow-up deeper drilling2.
In parallel, Power will undertake an RC drilling campaign of up to 10,000m targeting niobium and REE in untested areas of the Santa Anna Alkaline Complex, to deliver a maiden Mineral Resource Estimate (MRE) for the Project in Q1 calendar 2026 (subject to results)3,4. The first phase of this major campaign, a 2,000m program, is expected to commence this month.
Next steps
Power Minerals will continue the grid auger drilling while preparing to commence the extensive RC drilling. The new geophysical data will be modelled and a block model of the mineralisation created in preparation to assist with the delineation of a maiden Mineral Resource Estimate.
Company Notes:
“As we look to accelerate the exploration of Santa Anna following the completion of our acquisition, we are pleased to have completed this drone aerial survey to help us further understand the geology and identify the best areas for follow-up.
Given that a significant portion of the complex area remains untested by drilling, with minimal
exploration below 100 metres from surface, the introduction of this new geophysical dataset is
expected to provide crucial insights for exploration targeting and resource definition drilling.
We are set to commence a major RC drilling campaign of up to 10,000m to extend the project’s niobium and REE mineralised footprint, with an initial 2,000m program to commence this month. Identifying new target areas for drilling may help us to accelerate our evaluation of the project, and work towards a maiden Mineral Resource Estimate for Santa Anna in the first half of 2026.”
Power Minerals Managing Director Mena Habib
Full ASX Announcement: https://hotcopper.com.au/threads/ann-new-targets-identified-at-santa-anna-ree-nb-carbonatite.8931634/