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Commenting on Orroroo results, Executive Chairman Ben Phillips states: “We are excited by the results of the downhole geophysical survey and cannot understate the implications this has for the potential of a greenfields discovery in the Walloway basin. Typically, sandstone uranium mineralisation is hosted in flat and planar tabular bodies close to surface, and as a consequence, the best discoveries typically occur early in the life cycle of defining a new fertile sedimentary basin. We have rapidly and successfully confirmed the potential of the Walloway via the novel approach of reviewing gamma anomalies in historical wells drilled by the oil and gas industry, and overlooked by the minerals industry. Norfolk have 100% ownership of a very large basin area in Australia’s leading uranium resource state. Norfolk has presented favourable uranium occurrences at depths potentially suitable for in-situ extraction technology. We look forward to working with our stakeholders to accelerate our exploration efforts, leveraging modern geophysics for rapid delineation of potential paleochannels followed by high-impact drilling.”
- Norfolk Metals LimitedMetals Limited succeeds in confirming uranium occurrences at three targets tested (via PFN or Spectral Gamma) in the Walloway Basin providing important proof of concept for the prospectivity of the Walloway Basin for sediment hosted uranium deposits.
- These early results are considered significant and demonstrate the potential to unlock a new uranium province in South Australia, a leading jurisdiction for the discovery and development of world-class sandstone hosted uranium deposits (e.g. Beverley, Four Mile and Honeymoon).
- The downhole geophysical survey in historical exploration wells (undertaken by Linc Energy) returned a peak uranium reading of 650ppm pU3O8 within an interval of 192ppm pU3O8 over 0.5m from 112.59m via PFN survey in well 7P3.
- Depths of confirmed uranium occurrences at 100-113m are potentially suitable for proven in-situ recovery methods1.
- Confirmed uranium occurrences are located over 5km apart with remainder of the basin untested for uranium (well 15P1 to 7P3). The Company’s previous understanding of the extent of uranium occurrences, is limited to historical drilling by Linc Energy.
- The Walloway Basin has never been explored for uranium despite being the same age as sediments of the Frome Embayment which is host to Beverley, Four Mile and Honeymoon uranium resources.
- Norfolk Metals is a first-mover in the Walloway Basin and controls 100% interest in two exploration licences covering 659 square kilometres.
- The Company plans to accelerate exploration to a campaign of geophysics and roadside drilling to rapidly follow up on these initial results and target potential roll-front style uranium mineralisation.
Figure 1. Norfolk 100% owned EL6552 and EL6814 overlayed on the Walloway Basin sediments showing the initial target area, Linc Energy historical wells and recently confirmed uranium occurrences. The legend also shows the surface footprint of three (3) resources from the Frome Embayment at the same s
Orroroo Exploration
Downhole Geophysical Survey Summary
Norfolk is pleased to report the downhole geophysical survey conducted at the Orroroo Project has been completed. Spectral Gamma and Prompt Fission Neutron (PFN) well logs recorded during the survey will be utilised for further exploration planning; however, at this stage the program is considered successful having confirmed the following;
1. Uranium occurrences in all three target zones (wells) of which the depths are potentially suitable for proven in-situ recovery methods (refer to reference 1. on page 1 of this announcement)
2. Uranium peak reported at 650ppm pU3O8 within an interval of 192ppm pU3O8 over 0.5m from 112.59m via PFN in well 7P3; and,
3. Uranium recorded from this survey at expected target depths obtained from historical holes supports the proposed “oxidised tails or interface zones” of roll-front uranium style mineralisation theory proposed by the Norfolk geology team.
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EIS Grant for Minnie Springs Copper Porphyry Drilling
- Augustus Minerals has been granted a co-funded drilling grant of up to $110,000 for 2 x 700m deep diamond drill holes under the WA Government’s Exploration Incentive Scheme (EIS) for the Minnie Springs prospect.
- The deeper diamond drill program is designed to test and to provide a 550m deep, 1km wide geological/geochemical/structural cross-section through the large 3km long by 1km wide copper moly porphyry system, linking the Mo mineralised leucogranite to the extensive Cu in soil anomaly to the northeast.
- Previous RC drilling at Minnie Springs intersected mineralisation, geology and alteration halo consistent with the zoning of a large porphyry copper / moly system.
Andrew Ford, GM Exploration
“The Company is pleased to receive an EIS grant to complete deeper drilling at the Minnie Springs Copper Molybdenum Project. The resultant data will enable mapping of the lithology and alteration to a depth of 550m and potentially intersect, or provide vectors to, higher grade Mo-Cu mineralisation using a Mo-Cu porphyry geological model”.
Minnie Springs
Minnie Springs hosts porphyry related copper molybdenum mineralisation previously drilled and defined by Catalyst Metals. A molybdenum Exploration target has been defined for the historicdrillingareacomprisedofbetween12-84Mtasoutlinedbelow (Table 1 and Figure 1, 2.)1.
Table 1. Exploration target size estimate for Minnie Springs Molybdenum depositNote: Based on ~300 ppm cut-off at 100% recovery.
The potential quantity and grade of the exploration target is conceptual in nature, there has been insufficient exploration to estimate a Mineral Resources, and it is uncertain if further exploration will result in the estimation of a Mineral Resource.
The planned diamond drilling will complement the recently completed 3,200m RC drilling program that infilled around hole MSRC012 (18m @ 0.37% Cu and 9.7 g/t Ag from 94m downhole, and 16m @ 0.38% Cu and 19.4g/t Ag from 121m downhole2) and tested the northern half of the 2km long copper-in soil anomaly. Assays from this program are expected to become available over the next month.
The limited exploration in the region, highlighted by 95% of the Ti-Tree project having no previous exploration, demonstrates the prospectivity of this underexplored mineral province.
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Quarterly Activity Report 31 March 2024
Figure 1. Fiery Creek Copper Prospect/Yataga Granodiorite summarizing rock (brown diamonds) and termite mound sample results (black crosses)
Continuing with its primary exploration focus on the Georgetown project in the latter half of 2023, EMU received assay results during the quarter from its second, in field reconnaissance work. The geochemical sampling programme covered the Fiery Creek high grade copper vein swarm and the Snake Creek prospects with significant element results returned from the Fiery Creek Copper (elevated Cu-Au-Ag-Bi-In-Pb-Sb-Te) and Snake Creek (elevated Pb-Ag-Au-Sb).
Whilst the survey was cut short due to inclement weather, EMU was encouraged by the significant success reflected in the assays results. The results from mineralogical studies confirmed EMU’s interpretation of an indicative, scale Copper-Porphyry system at the Fiery Creek prospect and was a highlight of the survey with new information building on the scale and potential of the prospect1.
Assay results returned included:
- Fiery Creek rock assay results up to 23.5% Cu, 0.27ppm Au, 460ppm Ag, 1.9% Bi, 89ppm In, 2.7% Pb, 667ppm Sb, 1470ppm Zn2.
- evidence of strong potential for the presence of critical and strategic minerals (Cu, Bi, In), with precious and base metals.
- evidence of alteration mineralogy, mineralisation geochemistry and areal extent of the Fiery Creek quartz-Cu-Bi vein swarm strongly suggesting a previously unrecognised subjacent porphyry Cu-Mo system.
- Yataga Granitoid Complex termite mound and coincident rock chip sampling returned several anomalous polymetallic zones for follow up.
- Snake Creek Prospect assays returned 0.20ppm Au, 390ppm Ag, 22.4% Pb, 464ppm Sb1.
Significant results were returned from the Fiery Creek Copper prospect with elevated Cu-Au- Ag-Bi-In-Pb-Sb-Te and from the Snake Creek prospect with elevated Pb-Ag-Au-Sb.
The elevated pathfinder element results and a macro-petrology assessment3 of rock samples completed by Mr Nigel Maund, Consulting Economic Geologist, from the previously unexplored Fiery Creek Prospect, point to the discovery of a porphyry copper system.
The sampling program assessed a number of high-priority prospects within the Georgetown Project tenements utilising termite mound and outcrop rock chip geochemistry. A total of 46 rock chip and 489 termite mound samples were collected across eight prospects.
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