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Australian manganese explorer and developer, Black Canyon Limited (Black Canyon or the Company) (ASX: BCA) is pleased to announce further assay results yielding thick, shallow manganese enriched shales at the KR1 discovery within the Balfour Mineral Field (BMF), located in the Pilbara region of Western Australia.
HIGHLIGHTS
- Further assay results have been received from the ~7,000m reverse circulation (RC) drilling program completed across six key targets including KR1 within the Balfour Manganese Field.
- Results demonstrate thick manganese enriched shale mineralisation and continue to show scale at KR1, with the following significant intersections:
- KRRC024 3m @ 19.2% Mn from surface
- KRRC025 15m @ 18.6% Mn from 2m, including: 7m @ 26% Mn from 10m
- KRRC027 23m @ 12.2% Mn from 11m, including: 4m @ 18.4% Mn from 12m
- KRRC031 10m @ 15.2% Mn from 15m, including: 4m @ 18% Mn from 15m
- KRRC045 20m @ 11.4% Mn from 9m
- KRRC046 22m @ 12.2% Mn from 1m, including: 3m @ 18% Mn from 1m
- Drill assays confirm the KR1 manganese discovery has a cross strike width of between 200 to 500m and a strike extent of at least 600m and open to the north for a further 1,600m pending assay results.
- Overall geology, grade, and thickness are similar to Flanagan Bore mineralisation where 171Mt @ 10.3% Mn of Mineral Resource has been discovered at the FB3 and LR1 deposits.1
- Further assay results are expected from the other Balfour Manganese Targets over the next two months. The data will then be collated and Mineral Resource and/or Exploration Targets estimated subject to review of the results.
- Leaching testwork extracted 97% Mn from KR1 material2, which is part of the expanded High Purity Manganese Sulphate (HPMSM) variability study. Purification stages have now commenced on the leached KR1 sample.
- The results from KR1 demonstrate that subject to further metallurgical testwork, it could provide suitable feedstocks for manganese oxide concentrate used as alloys in the steel industry as well as downstream production of HPMSM.
The program, completed in July 2023, was designed to drill test six targets across Black Canyon’s 100% owned tenements within the Balfour Manganese Field (Figure 1). These latest assay results continue to demonstrate widespread manganese mineralisation at KR1 with several higher-grade intersections reported from surface or near to surface. All the drill samples are at the laboratory and further assays from the remaining targets are expected over the coming months.
Black Canyon Executive Director, Brendan Cummins, said:
“The continued delivery of wide zones of manganese enriched shale at KR1 has tripled the known strike of the mineralised body to 600m with a further 1,600m of drill results along strike to the northeast still to be received, which could see a material increase in the mineralised footprint. Cross-strike widths are also significant, ranging from 200 to 500m and the latest results have also shown shallow higher-grade intervals ranging between 18% and 26% Mn. In short, we are extremely pleased with the way the KR1 discovery is currently trending.
“The results are confirming our expectations of the mineralisation model and we are confident that KR1 and other key targets across the Balfour Manganese Field will help to build Mineral Resources, based on previous discoveries we have made in the region.”
Figure 1. Location of the main drill targets across the Balfour Manganese Field and manganese shale target horizon (red solid outlines).
KR1 Discovery RC Drill Assay Results
A total of 220 holes for 6,927m of drilling were drilled across six target areas. The program was designed to drill test multiple targets across Black Canyon’s 100% owned tenements within the Balfour Manganese Field. The drill intersections announced in this release represent further assays received from drilling at KR1, with approximately half of the KR1 drillhole results now reported.
At KR1, the Company tested a previously undrilled 2,500m section of outcropping supergene mineralisation using E-W oriented lines, 200m apart with drillholes spaced at 100m or 200m centres.
Widespread manganese mineralisation was encountered with stronger zones of surface manganese enrichment intersected along a 1,500m long ridge. The mineralised zones are between 200 and 500m wide, extending 10m to 25m downhole. The drill data and mapping completed at KR1 have confirmed the mineralised horizon is shallowly dipping to the west and striking to the north-northeast.
Satellite imagery and check mapping has confirmed additional untested manganese enrichment for a further 3,000m to the north combining to an overall strike length of 5,000m. The mineralisation to the south appears to be closed off or possibly displaced by a structure and infilled with dolerite, however this requires additional drilling to resolve.
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BCA:AU
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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Basin Energy Mining Exploration Entity or Oil and Gas Exploration Entity Quarterly Cash Flow Report
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