⚒️ Southern Hemisphere Mining Limited reports an Exploration Target for the Llahuin Copper-Gold-Moly Project, which was defined following the updated 218Mt MRE – released on 30 July 2025.
The Llahuin Exploration Target is between 260Mt and 340Mt.
⚒️ Southern Hemisphere’s Chairman Mr Mark Stowell commented:
“Our Exploration Target is ~260-340Mt in addition to the 218Mt JORC Resource, showing a pathway to a mine scale resource for a 25 year operation.”
The Exploration Target with the widest range between Lower tonnes and Upper tonnes and grade ranges reflect the lower amount of drilling data available for these prospects.
The Exploration Target is based on the current geological understanding of the copper mineralisation and endowment at Llahuin supported by >60,000m of RC and diamond drilling, recent MRE modelling, geological and structural mapping, surface IP geophysics, MT Geophysics, airborne geophysical data and interpretation and the comprehensive surface geochemical sampling sets available.
The Exploration Target does not consider factors related to detailed geological complexity, possible mining extraction methods or metallurgical processing or recoveries. This Exploration Target provides an assessment of the potential scale of the Llahuin Project mineralisation beyond the existing MRE and of the work programs needed to convert this Exploration Target into at least an Inferred MRE in the future.
The reported Llahuin Project Exploration Target is defined over three deposit and prospect areas. The majority is based on planned infill drilling between resources and extensions thereof as shown below, and the remainder is unclassified resources based on drill results albeit spacing too wide to classify as inferred.
Figure 15. Exploration target (Blue) and resource shells (Green). MT Targets (pink) (Looking ENE). Grid size 250m x 250m.
Geological Volume and Unclassified Mineralisation
A total of 109,000,000 cubic metres is contained within the interpreted blue wireframe shell, defined using drillhole data, geochemical assays, and geophysical interpretations.
Unclassified mineralised volumes (RCAT = 4) within the three main resource areas are as follows:
- Central Porphyry: 907,000 cubic metres – Unclassified
- Cerro De Oro: 3,310,000 cubic metres – Unclassified
- Ferro Carril: 3,350,000 cubic metres – Unclassified
The combined baseline volume is estimated at 116,600,000 cubic metres (rounded), with a lower range (-10%) (taking into account internal barren intrusives,) tonnage of ~260 million tonnes and an upper range (+20%) of ~340 million tonnes, assuming the same bulk density values used in the current MRE – (Approximately 2.67 tonnes / cubic metre). The Exploration Target has not extended below the depth of the majority of the existing drilling.
Grade ranges for copper, gold, and molybdenum are based on the current MRE and geological interpretations derived from drilling and analytical work completed to date.
The Exploration Target is to be evaluated through staged drilling programs, with the aim of generating JORC-compliant MREs—initially expected to meet the criteria for Inferred classification—within each prospect area or deposit identified. These programs are planned to be undertaken progressively over the coming years.
This Exploration Target is exclusive of the current MRE.
The Exploration Target has been prepared and reported in accordance with Clause 17 of the JORC (2012) Code and disclosed in compliance with ASX Listing Rule 5.7.2.
The potential quantity and grade of the Exploration Target is conceptual in nature. There has been insufficient exploration to estimate a Mineral Resource, and it is uncertain whether further exploration will result in the estimation of a Mineral Resource.
The Exploration Target is based on geological mapping and interpretations, drilling, geophysics, soil sampling geochemistry and Resource Model Interpretation. All relevant material assumptions used in the generation of this Exploration Target are outlined in the body of this announcement and in the accompanying JORC Table 1.
The Exploration Target is reported as a range of tonnes and grade in accordance with the requirements of ASX Listing Rule 5.7.2(a).
Cautionary Statement: The potential quantity and grade of the Exploration Target is conceptual in nature. There has been insufficient exploration to estimate a Mineral Resource in the area considered an Exploration Target (except where noted) and it is uncertain if further exploration will result in the estimation of additional Mineral Resources.
The Exploration Target has been prepared and reported in accordance with the 2012 edition of the JORC Code.
⚒️ Increased Llahuin JORC MRE Executive Summary
The Llahuin MRE totals 218Mt at an average grade of 0.38% CuEq (at a 0.22% CuEq cutoff grade) as tabulated below and includes 496,600t of Copper 654,900oz of Gold and 12,500t of Molybdenum.
Metal recoveries have not been applied in the CuEq calculation which is based solely on metal prices. The CuEq is provided as a comparative tool only and should not be used for economic valuation.
⚒️ HIGHLIGHTS
- Mineral Resource Estimate (MRE) for the Llahuin Copper-Gold Project of 218Mt at an average grade of 0.38% CuEq
- MRE is across three deposits, with strong potential to define further resources (refer new Exploration Target)
- Progressing towards mine scale open pit configuration.
⚒️ Southern Hemisphere’s Chairman Mr Mark Stowell commented:
“We are delighted to report this Mineral Resource update which is a compliment to our team’s work over the past 4 years at Llahuin.
The JORC Resource underpins the future potential of this project over a substantial strike of ~4km with our shallow drilling adding to the from- surface resources and prospects. This does two things, first: to continue advancing towards mine scale and secondly: the potential of this system that can produce large tonnages at surface over such strike length has a high probability of substantial copper endowment at higher grades deeper. We will initially test this at the Curiosity-Southern Porphyry scheduled for drilling in Q4 2025 with FMR Resources Limited (ASX: FMR).
We see considerable scope for resource growth at Cerro-Ferro including the Ferro West MT target, and the recent discovery at Ferro South given shallow drilling to date in these areas. Our Exploration Target is ~260-340Mt in addition to the 218Mt JORC Resource.”
News Release
Date: 30 July 2025 | ASX Code: SUH | Frankfurt Exchange: NK4
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Southern Hemisphere Mining Limited is an experienced minerals explorer in Chile, South America.
Chile is the world’s leading copper producing country and one of the most prospective regions of the world for major new copper discoveries. The Company’s projects include the flagship Llahuin Porphyry Copper-Gold-Moly Project and the Los Pumas Manganese EV Battery Project, both of which were discovered by the Company.
For the latest information about the Company – please visit our Latest News and Corporate Profile pages. We are also on LinkedIn and Twitter (X).
