Elizabeth Creek Copper Cobalt Project
The Elizabeth Creek Copper Cobalt Project is centred approximately 30 km south-east of Woomera and 135 km north-west of Port Augusta in South Australia.
The project currently covers 701 km2 in the Olympic Dam Copper Province, Australia’s most productive copper belt. The project is located 100 km south of BHP Billiton’s Olympic Dam copper-gold-uranium mine and 50 km west of OZ Minerals’ Carrapateena copper-gold project.
The project mining centre lies 10 km off the sealed Stuart Highway and is accessed by established unsealed roads. Established access to electrical grid power and scheme water is available in the area. The Adelaide to Perth/Darwin railway runs parallel to the Stuart Highway. Additionally, regular air services are available at Roxby Downs and Port Augusta, and a serviceable airstrip for light aircraft is located on site. Accommodation is available at Woomera.
GEOLOGY
The MG14 and Windabout copper-cobalt deposits at Elizabeth Creek, are hosted by flat-lying undeformed sedimentary rocks of Late Proterozoic Age, deposited on the Stuart Shelf. These platform sediments are referred to as the ‘Cover Sequence’ and unconformably overlie complexly deformed and metamorphosed igneous rocks of the eastern margin of the Archaean Gawler Craton.
The copper-cobalt-silver mineral deposits are composed of sediment-hosted fine-grained sulphides. Copper is primarily hosted in chalcopyrite, with accessory chalcocite and bornite, with Cobalt is primarily in the form of carrolite.
The main mineralisation occurs as well-defined stratabound zones at the upper and lower contacts of the dolomitic shales and arenites of the host Tapley Hill Formation (THF). The THF appears to have been deposited in shallow basin-like structures elongated along a north-west to south-east trend. Elevated base metal values (copper, lead and zinc) occur throughout the unit, but large-scale economic deposits are rare outside of the Elizabeth Creek area.
RESOURCES AND RESERVES
MG14 & WINDABOUT
The MG14 deposit is a concealed, flat lying body of disseminated copper sulphide mineralisation at 25m depth. It is oriented east-west and is approximately 1,400 m long by 400 m wide with a varying thickness between 3 to 8 m. A JORC 2012 compliant resource was estimated by T. Callaghan in January 2018 with a cut-off grade of 0.5% Cu equivalent.
The Windabout deposit is similar in style to MG14 with copper sulphide mineralisation dipping approximately 5° to the north-east and varying in depth from 55m to 80m. The deposit is elongated east-west and is approximately 2,000 m long by 1,000m wide with varying thickness between 3 to 8 metres. A JORC 2012 compliant resource was estimated by T. Callaghan in January 2018 with a cut-off grade of 0.5% Cu equivalent.
MG14 deposit has a JORC 2012 compliant indicated resource estimate as follows [1]
| CuEq > 0.5% cut off | CuEq > 1.0% cut-off | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Mt | Cu % | Co ppm | Ag g/t | CuEq% | Mt | Cu % | Co ppm | Ag g/t | CuEq% |
| 1.83 | 1.24 | 334 | 14 | 1.67 | 1.59 | 1.33 | 360 | 15 | 1.8 |
The Windabout deposit has a JORC 2012 compliant indicated resource estimate as follows [1]
| CuEq > 0.5% cut off | CuEq > 1.0% cut-off | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Mt | Cu % | Co ppm | Ag g/t | CuEq% | Mt | Cu % | Co ppm | Ag g/t | CuEq% |
| 17.67 | 0.77 | 492 | 8 | 1.41 | 11.86 | 0.95 | 599 | 10 | 1.73 |
The currently contemplated mining strategy for MG14 and Windabout mineral deposits is based on the shallow depth, free dig overburden, and their sheet-like and sub-horizontal structure. The MG14 orebody would likely be mined first due to its higher grades and shallow depth while Windabout, with a lower head grade, longer life, and higher stripping ratio would likely be mined subsequently.
Emmie Bluff
The Emmie Bluff prospect in the north of the Elizabeth Creek project area is comprised of the same style of Tapley hosted Cu-Co-Ag mineralisation style as is found at MG14 and Windabout. Emmie Bluff is an underground target, with the top of mineralisation sitting at approximately 400m.
Much like the other deposits, the host rock is largely flat lying, extending over an area of roughly 3km by 2km, with mineralisation split into an upper and lower lode at the Tapley Hill’s contact horizons.
The company has recently defined a significant JORC 2012 compliant maiden Mineral Resource Estimate (MRE) at Emmie Bluff, demonstrating the enormous scale of the deposit, which is one of the largest known of its type in Australia.
The Emmie Bluff JORC 2012 compliant mineral resource estimate is as follows[2]
| Category | Copper Equivalent | Copper | Cobalt | Silver | Zinc | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tonnes | Grade (% CuEq) |
Contained Metal (t) | Grade (% Cu) |
Contained Metal (t) | Grade (ppm Co) |
Contained Metal (t) | Grade (g/t Ag) |
Contained Metal (MOz) | Grade (% Zn) |
Contained Metal (t) | |
| Indicated | 38,800,000 | 1.9% | 735,000 | 1.3% | 515,000 | 500 | 19,000 | 11 | 15 | 0.15% | 58,000 |
| Inferred | 4,500,000 | 1.4% | 62,000 | 1.1.% | 47,000 | 230 | 1,000 | 9 | 1 | 0.17% | 8,000 |
| Total | 43,300,000 | 1.84% | 797,000 | 1.30% | 562,000 | 470 | 20,000 | 11 | 15.5 | 0.15% | 66,000 |
Competent Person Statement for MG14 and Windabout JORC 2012 Mineral Resource
This report was prepared in accordance with the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ (“JORC Code”) by Tim Callaghan, who is a Member of the Australian Institute of Mining and Metallurgy (“AusIMM”), has a minimum of five years’ experience in the estimation and assessment and evaluation of Mineral Resources of this style and is the competent Person as defined in the JORC Code. This information accurately summarises and fairly reports his estimations and he has consented to the resource report in the form and context it appears.
The MG14 and Windabout Mineral Resource at the Elizabeth Creek Copper-Cobalt Project has been estimated by Mr Tim Callaghan, an external consultant, and is reported under the 2012 Edition of the Australasian Code for reporting of Exploration Results, Mineral Resources and Ore Reserves (see Coda Minerals ASX announcement 26 October 2020 titled: Confirmation Statements (JORC)).
Competent Person Statement for Emmie Bluff JORC 2012 Mineral Resource
The information in this statement that relates to the Mineral Resource Estimate is based on work done by Dr Michael Cunningham of Sonny Consulting Services Pty Ltd. Dr Cunningham is a member of the Australasian Institute of Mining and Metallurgy and has sufficient relevant experience to the style of mineralisation and type of deposit under consideration and to the activities undertaken to qualify as a Competent Person as defined in the 2012 Edition of the Joint Ore Reserves Committee (JORC) Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. This information accurately summarises and fairly reports his estimations and he has consented to the resource report in the form and context it appears.
The Emmie Bluff Mineral Resource at the Elizabeth Creek Copper-Cobalt Project has been estimated by Dr Michael Cunningham, an external consultant, and is reported under the 2012 Edition of the Australasian Code for reporting of Exploration Results, Mineral Resources and Ore Reserves (see Coda Minerals ASX announcement 20 December 2021 titled: Standout 43Mt Maiden Cu-Co Resource at Emmie Bluff).
References
[1] CONFIRMATION OF EXPLORATION TARGET & MINERAL RESOURCE AND ORE RESERVE STATEMENT “https://coda.scriptylion.com/wp-content/uploads/2020/10/20201026_Coda_ASX-ANN_Confirmation-Statements-JORC.pdf”
[2] STANDOUT 43MT MAIDEN Cu-Co RESOURCE AT EMMIE BLUFF “https://www.codaminerals.com/wp-content/uploads/2021/12/20211220_Coda_ASX-ANN_Standout-43Mt-Maiden-Cu-Co-Resource-at-Emmie-Bluff_RELEASE.pdf
Elizabeth Creek
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IOCG Drill Hole – DD21EB0018
PROJECTS
ELIZABETH CREEK CAMERON RIVER
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