The Conversation (0)
GreenTech Metals Ltd (ASX: GRE) (GreenTech or the Company) is pleased to announce a second stage drill program at the Whundo Cu-Zn project in the West Pilbara region, which is anticipated to commence in the coming weeks.
Highlights
- GreenTech has finalised plans for the second stage drill program comprising up to 4,000m of diamond core drilling at its 100% owned Whundo Cu-Zn project in the West Pilbara
- The stage 2 program aims to confirm potential for significant resource expansion at the Whundo cluster of VMS style Cu-Zn deposits
- Drilling will focus on extending the under-explored mineralised shoots at Austin, Shelby, Yannery and Ayshia
- Drilling to be followed by downhole electromagnetic (DHEM) surveys aimed at identifying further extensions to the Cu-Zn mineralised shoots
- Identified DHEM conductor targets associated with the known mineralised shoots present potential to significantly increase existing Cu-Zn resources
- Drilling contractor Topdrill has been engaged to commence in the coming weeks
- Drilling is funded by recently completed $2.3M placement, $1M drill for equity agreement with Topdrill and an EIS grant of up to $140,000 from the WA Government1
GreenTech’s Executive Director, Tom Reddicliffe, commented: “Following hot on the heels of a successful first stage of drilling, this next campaign will get underway this year to further test potential extensions to the mineralised shoots comprising the Whundo VMS cluster. In particular, we eagerly await the outcome of testing the exceptional Shelby conductor which eclipses other targets in the field with respect to its scale. This target is a clear standout and will be a priority to be drilled. Given the nature of VMS clusters, and the multiple opportunities for resource growth we believe a project with around 10-15Mt would make a significant difference to the economics of the Whundo Copper project and represents a potentially achievable target for exploration going forward.”
The program aims to confirm potential for significant resource expansion at the Whundo cluster of VMS style Cu-Zn deposits and is a follow-up to the successful first program of 1,710m completed in July 2024.
This second drill campaign will comprise up to 4,000m of diamond core drilling, with follow- up downhole electromagnetic (DHEM) surveys planned for selected holes. The results of the DHEM surveys will assist in the planning of follow-up drill holes which may be drilled as part of this program.
Figure 1: Whundo Resources, Prospects and Targets over Electromagnetic Image
Whundo VMS Field
The Whundo Project comprises six known mineralised Cu-Zn shoots, typically plunging to the north at 30 – 40 degrees. These mineralised shoots, known as Whundo East, Whundo West, Austin, Shelby, Yannery and Ayshia, occur within a defined generally northeast trending zone over a strike of 2km. A further combined 2km of this prospective zone remains open to both the west and the east of the known mineralisation within the tenement. The close spatial relationship between the known mineralised shoots with respect to plunge and thickness of mineralisation suggest these are potentially part of a large VMS type mineralising event which remains open along strike and at depth.
Click here for the full ASX Release
This article includes content from GreenTech Metals Limited, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
GRE:AU
New Ground Acquisition at Broken Hill
- Impact to acquire a large tenement package from New Frontier Minerals Limited (ASX:NFM) adjoining its existing ground holding that almost completely surrounds the giant Broken Hill lead-zinc-silver mine in New South Wales.
- Impact’s ground now extends over 1,770 sq km and covers an area considered extremely prospective for large copper deposits following a novel exploration model that formed the basis of the company’s participation in the inaugural BHP Xplor program in 2023.
- Detailed mapping and sampling of 99 gabbro sills and other work completed during the Xplor program confirmed the copper potential with numerous areas for further exploration identified within the Broken Hill sequence. At least one such target lies within the newly acquired ground.
- Next steps will include ground geophysics to help identify targets for drilling.
- Terms of the acquisition are as follows: Impact to purchase BHA No 1 Pty Ltd, a wholly owned subsidiary of NFM, for $275,000 in Impact shares and subject to staged voluntary escrow over six months commencing one month after Completion.
The acquisition builds on exploration and research completed as part of the BHP Xplor program, in which Impact participated in its inaugural year, and positions the company as one of the largest ground holders in the region, particularly to the south of Broken Hill. Impact now has 100% ownership of tenements covering 1,770 sq km and over 100 kilometres of strike (Figures 1 and 2; ASX Releases January 17, 2023, and February 16, 2023).
The Broken Hill region is currently experiencing a resurgence of interest in exploration. Broken Hill Mines (ASX: BHM, formerly Coolabah Metals Limited) recently purchased the privately owned Rasp Mine in Broken Hill and the nearby Pinnacles deposit. In addition, South32 Limited has entered a joint venture with a private company that owns a significant ground holding north of the Broken Hill mine. This interest is partly driven by a recent increase in silver prices and long-term demand trends for zinc and lead.
The Search for Copper at Broken Hill
Since the discovery of the giant Broken Hill deposit in 1883, most previous exploration has focused on silver-lead-zinc mineralisation. However, various styles of copper mineralisation are also known to occur throughout the region and have been the focus of some exploration and shallow drilling, though with limited success (Figures 1 and 2). Since copper mineralisation is commonly associated with, but peripheral to, numerous silver-lead-zinc deposits, many exploration geologists have asked, “Where is the large copper deposit at Broken Hill?”.
Figure 1. Image of regional total magnetic intensity showing the Broken Hill orebody (Line of Lode), Impact’s granted licences and licence applications and the new tenements acquired. Note the Thackeringa Fault and Farmcote shear zone, both interpreted as deep-seated long-lived crustal lineaments, and the interpreted sub-basin in the new tenements. Widespread copper occurrences attest to the prospectivity of the region for copper. Impact’s rock chip locations are also shown.
Figure 2. Image of the first vertical derivative of regional magnetic data as in Figure 1. A detailed interpretation of this data has resulted in the identification of numerous target areas for large copper deposits.
Impact became interested in the region's copper potential during exploration for silver-lead- zinc at the Dora East prospect, located about 30 km south of Broken Hill (Figures 1 and 2). Here, Impact discovered moderate widths of high-grade silver-lead-zinc mineralisation and narrow zones of high-grade copper-silver mineralisation (Figure 3 and ASX Releases December 8, 2015, and February 19 2016).
Click here for the full ASX Release
This article includes content from Impact Minerals, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
BHP to Spend up to A$40M to Explore for Tier 1 Copper-Silver Deposits on CBE Tenements in Botswana
Highlights
- The Transaction comprises the following key funding terms (detailed in Schedule 1):
- A minimum of US$5 million of committed funding to be paid to Cobre within 2 years of the commencement date with a planned budget of US$7m (A$11m) for exploration expenditure for the Kitlanya Projects starting in April 2025; and
- BHP can earn a 75% interest in the Kitlanya Projects by funding US$25 million (inclusive of the initial US$5 million) for exploration expenditure for the Kitlanya Projects.
- Cobre Botswana will be appointed operator during the earn-in phase and will be entitled to a management fee of no less than US$250,000 per annum.
- Upon commencement of the 75:25 joint venture, BHP may provide a loan to Cobre to fund Cobre's portion of joint venture expenditure up until the final investment decision.
- An additional payment of up to US$10 million, calculated at $5/tonne contained copper, is payable to Cobre upon the declaration of a maiden JORC Compliant Mineral Resource (JORC) at the Kitlanya Projects.
- If the Transaction is terminated during the Earn-In Phase and BHP has funded at least US$20 million for exploration expenditure, BHP will be entitled to a 2.0% net smelter royalty in respect of the Kitlanya Projects. Cobre may, in certain circumstances, buy back 50% of this royalty for an amount equal to the aggregate of exploration expenditure funded by BHP at the time of electing to exercise the buy-back.
- The Transaction does not cover Cobre’s flagship Ngami and Okavango Copper Projects which Cobre will continue to operate and advance independently.
The Transaction underscores Cobre's confidence in the potential for its projects to host Tier 1 copper- silver deposits. A partnership with BHP provides the exploration funding, scale and expertise to maximise Cobre's chances of making significant new discoveries on our basin margin exploration ground while retaining 100% ownership of its Ngami and Okavango Copper Projects.
The planned work programme for the initial US$7m includes several deep (~1km) diamond holes combined with active 2D seismic survey designed to assess key components of the Mineral System required for Tier 1 copper deposit formation. Mobilisation for the first phase of drilling, which will test targets identified in the 2024 seismic programme at Kitlanya West, is scheduled for April 2025.
Tim O’Connor, BHP Group Exploration Officer said:
"We are thrilled to continue our partnership with one of the BHP Xplor alumni, Cobre Limited, through this agreement. This collaboration reflects our excitement for the exploration potential in Botswana and underscores the high standard of partnerships we see coming out of the BHP Xplor program. The Kitlanya Projects in Botswana represent an exciting opportunity to uncover Tier 1 copper-silver deposits, and we are pleased to contribute our expertise and resources to this venture.”
Commenting on the Transaction, Adam Wooldridge, Cobre’s Chief Executive Officer, said:
“This significant transaction with BHP, one of the world’s leading mining companies, is a major moment in time for Cobre as a company as well as a testament to the success of BHP’s Xplor programme. The partnership with BHP will provide us with the funding and support necessary to implement a technology-driven work programme designed to discover the Tier 1 deposits we believe may be hosted in our Kitlanya East and West Projects.
Independently, Cobre will continue advancing its Ngami and Okavango copper Projects.This combined strategy provides exposure to potential Tier 1 discoveries, a development opportunity at Ngami and short-term discoveries on our Okavango project.”
Commenting on the transaction, Martin Holland Chairman of the Cobre board, said:
“First and foremost, I would like to extend my gratitude to BHP for their exceptional efforts in the 2024 BHP Xplor program, which aims to foster bold thinking and elevate global exploration to new heights.
I would also like to thank the Cobre Board and team, especially our CEO Adam Wooldridge and Technical Lead Thomas Krebs, for their tireless dedication throughout the year-and-a-half-long process that has led us to this point and for their efforts in successfully finalising this transaction with BHP.”
Figure 1. Locality map illustrating the position of Cobre’s project areas. Green licenses are relevant tothe Transaction, dark grey licenses will be run, and are owned, independently by Cobre.
Geology, Mineralisation and Exploration Target
Mineralisation in the KCB is sediment-hosted and structurally controlled, with copper-silver mineralisation most frequently hosted along the redox contact between the basal units of the reduced marine sedimentary rocks of the D’Kar Formation and oxidised clastic sedimentary red bed units of the Kuke and Ngwako Pan Formations and the underlying volcanosedimentary Kgwebe Formation. Of particular interest for Tier 1 deposits are the tight, upright folds which offer ideal trap-sites for upgrading of copper-silver mineralisation and formation of large deposits. These folds are typically bounded by district-scale shears (often with evidence of copper anomalism) which would provide the necessary plumbing architecture for movement of copper-rich fluids during basin formation and subsequent closure and deformation. A schematic illustration of the preserved fold hinge model is illustrated in Figure 2. The upcoming exploration programme will focus on testing these buried anticline hinge zones along with assessing primary basin architecture, source rocks, fluid pathways and trap-site mechanisms.
Figure 2: Schematic illustrating of the target model compared with typical settings for known KCB deposits.
Click here for the full ASX Release
This article includes content from Cobre Limited, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
