Newsflow and Key Activities16 Jul 2025 17:56
Hope to see continued news flow and would hope to see at minimum in line with the following taken from the recent RNS Boland Update :-
Sonic Core Drilling
In May 2025, 445.3m of sonic core drilling was completed across the 6km2 mineralised footprint at Boland, enabling analysis of drilling recovery, sample repeatability and the mapping of geological characteristics important to ISR. Key points include:
· Assay results from sonic core drilling are imminent - DONE 👍
· Sample representation between previous aircore drilling and sonic core drilling to be evaluated from the twinning of multiple holes:
o Previous wellfield sonic core drilling resulted in significantly higher grades when compared to low-cost aircore drilling
o Sonic drilling provides 100% sample recovery through the confined aquifer, where ionic mineralisation enriched in dysprosium and terbium is absorbed to fine organics within coarse permeable sands
o Twinning of aircore holes enables a direct evaluation of the effective sample recovery by aircore drilling
· Results will be a precursor for further resource definition drilling
Resource Definition
Cobra aims to define a maiden rare earth MRE at Boland, which will be a precursor to economic scoping.
Key activities include:
· The Company has modelled drilling results to date and is close to appointing an independent Competent Person to commence the technical requirements to enable a resource estimation
· Core density results on 10 sonic core samples are expected to be completed by ANSTO soon
· A total of 395 samples from the recently acquired tenement EL6742 have been extracted from the core library and are at the laboratory for REE analysis. Results are anticipated in late July 2025
· Further samples are planned to be collected in the coming weeks to test a further 50 drill holes for Boland-type mineralisation across the acquired tenements (see Figure 1)
· Cobra is preparing the necessary approvals to enable drilling on the recently acquired tenements upon the transfer of title
Infield Permeability Study
In 2024, Cobra demonstrated the ISR potential of Boland mineralisation through three bench-scale ISR tests that successfully demonstrated high REE recoveries and high permeabilities. Infield permeability and hydrology testing aims to demonstrate these key productivity metrics in the field, as a basis for future engineering and economic evaluation. Key workstreams include:
· Further monitoring wells installed at the Boland wellfield in May 2025
· Electronic Program for Environment Protection and Rehabilitation ("EPEPR") lodged seeking approvals for a permeability study aimed at testing the ISR mining rate achievable within the wellfield installed at Boland
· Discharge permit application to be submitted upon receipt of EPEPR approval
· Key consultants have been engaged for study execution
· Cobra is targeting August 2025 for permeability study completion