Southern Cross GOLD Achieves Significant Metallurgical Development at Sunday Creek GOLD-Antimony Project
Mariana Bermudez – Corporate Secretary
+1 604 685 9316 [email protected]
1305 – 1090 West Georgia Street Vancouver, BC, V6E 3V7, Canada
Nicholas Mead – Corporate Development
+61 415 153 122 [email protected]
Level 21, 459 Collins Street, Melbourne, VIC, 3000, Australia
SOUTHERN CROSS GOLD CONSOLIDATED LTD
TSX: SXGC | ASX: SX2
www.southerncrossgold.com
NEWS RELEASE
TSX: SXGC | ASX: SX2
AUGUST 06, 2025
SOUTHERN CROSS GOLD ACHIEVES SIGNIFICANT METALLURGICAL
DEVELOPMENT AT SUNDAY CREEK GOLD-ANTIMONY PROJECT
Vancouver, Canada and Melbourne, Australia - Southern Cross Gold Consolidated Ltd ("SXGC", "SX2"
or the "Company") (TSX:SXGC) (ASX:SX2) (OTCPK:MWSNF) (Frankfurt:MV3.F) is pleased to announce a
significant metallurgical development at its Sunday Creek Gold-Antimony Project in Victoria.
Stage 2 test work has demonstrated successful selective flotation processing that produces a high-grade,
low-arsenic antimony-gold concentrate from the upper antimony rich zones of the deposit, alongside excellent
recovery of native gold.
Michael Hudson, President & CEO, states: "This significant metallurgical development significantly de-
risks our Sunday Creek project and positions us to potentially deliver multiple high-value products to market.
The combination of excellent overall native gold recovery with the ability to produce premium antimony
concentrates validates our strategy and enhances the project's economic potential. The timing is particularly
favorable given antimony's exemption from the recent US Executive Order on Reciprocal Tariffs and ongoing
Chinese export restrictions on this critical metal."
Mr. Craig Brown, a Fellow of the Australasian Institute of Mining and Metallurgy and Metallurgical
Consultant to Southern Cross Gold , commented: "This represents a significant advancement in our
metallurgical understanding. We have demonstrated we can produce low -arsenic antimony concentrates
while maintaining excellent gold recovery across multiple product streams. The selectivity we've achieved
against arsenic in the antimony flotation stage will likely reduce reliance on blending strategies to produce
acceptable concentrates."
Key Points
1. Significant Development: Selective Flotation Technology
Identified specialized collector chemistry that successfully separates antimony minerals from arsenic -
bearing minerals, solving a key requirement while maintaining excellent gold recovery.
2. Triple Product Stream
Overall gold recovery of 92.3% to 95.6% across three product streams:
1. Gravity gold concentrate (37.3 – 51.4% recovered gold).
2. Antimony-gold concentrate (28.8 - 36.5% recovered gold): Antimony grades 48.2 – 53.1%, gold
grades up to 93.2 g/t and arsenic grades 0.1% to 0.2% (well below 0.6% thresholds). Antimony
recovery 83.2% to 92.7%.
3. Sulphide concentrate (15.5-18.0% recovered gold)
3. De-Risked For Further Development
A total of 144 samples from Apollo and Rising Sun prospects prov ide geometallurgical variation, with
established processing conditions ready for scale -up through locked -cycle testing, pilot plant evaluation,
and process plant design targeting Q1 2027.
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Stage 1 Sighter Tests - Proving the Concept
The metallurgical journey at Sunday Creek began with initial sighter testing conducted on two drill holes from
the project reported in January 11 2024. This work demonstrated that the mineralization responded well to
standard gravity recovery and selective flotation processing, producing high recovery of both gold and
antimony to separate high value concentrates.
The initial program successfully outlined a n indicative flow sheet for Sunday Creek consisting of gravity
separation of gold, followed by bulk or sequential flotation of gold and sulphides. This resulted in high
recoveries of both gold and antimony into products that were anticipated to be readily saleable, whi le also
highlighting the non-refractory nature of native gold at Sunday Creek with a high proportion of native ('free')
gold in both test samples, with 84.0% in the RS01 sample and 82.1% in the AP01 sample.
The initial results were highly encouraging, achieving total gold recovery of 93.3% to 97.6% across three
separate products, with primary antimony recovery of 89.5% to 94.3% in antimony concentrates. The
samples also demonstrated high cyanide solubility of gold at moderate grind size (74.8% to 68.4%) an d
effective gravity recovery of 18% to 33% to high-grade concentrates ranging from 185 to 1,090 g/t Au.
Stage 2 Development - The Significant Development
Building on the initial sighter test results, the development team embarked on a Stage 2 program designed
to investigate three critical areas: 1) gravity recovery optimization with upgrading of rougher products, 2)
flotation enhancement using a range of chemical conditions and specialized collectors to improve selectivity
between sulphide minerals in the antimony flotation stage while maintaining high overall gold recovery, and
3) advanced processing of flotation concentrates to assess the metallurgical response of contained gold.
The dataset examined included 66 mineralized intersections from the Apollo prospect and 74 from the Rising
Sun prospect, providing a robust foundation for understanding metallurgical variability across the deposit .
Two bulk samples were prepared from s elected drill core intersections to enable preliminary evaluation of
spatial and mineralogical composition variability across the main project zones.
The Apollo composite (AP02) comprised 46.0 kg of material grading 4.84 g/t Au, 1.33% Sb, and 0.17% As.
The Rising Sun composite (RS02) totalled 49.0 kg with grades of 5.83 g/t Au, 0.73% Sb, and 0.3 3% As. A
Rising Sun Deep composite (RS03) represent ing the deeper, higher -grade zones with 32.5 kg of material
grading 21.8 g/t Au, 0.24% Sb, and 0.25% As was selected for testing with the enhanced processing strategy
and conditions. Further data from RS03 will be presented when results become available.
Current Significant Achievement
This work centres on the successful development of selective flotation conditions using specialized collectors
that effectively separate stibnite (antimony sulphide) from arsenopyrite and pyrite, addressing a general
challenge for antimony -gold projects globally. Th is work was conducted at the ALS Burnie Laboratory ,
Tasmania. Recent test work using selective flotation methodology achieved positive results (Table 1) through
single rougher plus cleaner flotation stages. The results demonstrate a n improvement in both recovery and
selectivity compared to initial testing.
Table 1: Rougher-Cleaner Concentrate Assays (Post gravity extraction)
Parameter AP02 Sample RS02 Sample Units
Gold Grade 93.2 59.3 g/t
Antimony Grade 53.1 48.2 %
Arsenic Grade 0.14 0.16 %
Iron Grade 3.71 3.42 %
Sulphur Grade 25.2 22.1 %
Calcium Grade 0.53 1.37 %
Magnesium Grade 0.45 0.84 %
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The gold grade of the concentrate reflects the interplay between the proportion of feed gold associated with
arsenic-iron sulphides, the ratio of gold to antimony in the feed, the gold recovered to the metallic gold
product, and the flotation rate of gold in the first flotation stage.
Converting these concentrate assays to representative mineral percentages (Table 2) reveals the purity
achieved through the process:
Table 2: Mineral Composition Analysis
Mineral Phase AP02 Sample (%) RS02 Sample (%)
Stibnite 74.2 67.3
Arsenopyrite 0.3 0.4
Pyrite 7.8 5.6
Non-Sulphide Gangue 17.7 26.8
Performance Metrics - Validation of Success
Antimony recovery to concentrate ranged from 83.2% to 92.7% depending on feed type, while achieving
antimony concentrate arsenic grades of 0.1% to 0. 2%, significantly below the 0.6% thresholds typically
required by antimony smelters.
The process consistently produces antimony concentrate grades up to 53.1% with gold grades in
antimony concentrate reaching up to 93.2 g/t, while maintaining overall gold recovery of 91.8% to 95.6%
across the three product streams.
Strategic Processing Framework
The development work has established a sophisticated three -product processing strategy that maximizes
value recovery through complementary extraction methods (Table 3).
• The first product stream focuses on gravity metallic gold concentrate, achieving direct recovery of
native gold representing up to 51.4% of feed gold to high-grade concentrates with minimal processing
requirements.
• The second and most significant development involves the antimony -gold concentrate, producing
high-grade concentrates up to 53.1% Sb with low arsenic content below 0.2% As. These concentrates
are potentially highly marketable to antimony smelters and could offer excellent potential payabilities.
• The third product stream captures remaining free gold and gold associated with pyrite -arsenopyrite
in a marketable and leachable sulphide concentrate, ensuring high overall gold recovery is maintained
across the entire process.
Table 3: Gold Distribution Across Products
Product AP02 Au Recovery RS02 Au Recovery Product Quality
Metallic Gold 37.3% 51.4% Direct recovery
Antimony-Gold Con 36.5% 28.8% 59-93 g/t Au
Au-S Concentrate 18.0% 15.5% 7-23 g/t Au
Total Recovery 91.8% 95.6%
Comprehensive Testing Methodology
The success of this work resulted from a comprehensive testing program that included diagnostic
LeachWELL testing, gravity recovery optimization, timed flotation with chemical condition variations, two -
stage bulk rougher flotation with separate cleaning stages, gravity testing of concentrates, and cyanide
solubility analysis. Quarter core samples were crushed, homogenised and split for analysis at ALS Burnie
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Laboratory, with diagnostic cyanide leaching conducted alongside gravity recovery using Knelson
concentrator technology with Mozley Panner upgrade and extensive flotation testing with staged reagent
additions.
Future Development Pathway
The results demonstrate significant scope for further optimization through additional cleaning stages to
remove non -sulphide gangue, multi -stage cleaning optimization, locked -cycle testing for overall recovery
confirmation, and process recycling optimization. Future testing will focus on understanding the effect of grind
size on recoveries, understanding gold-rich/lower antimony grades within deeper mineralization, and creating
geometallurgical models across deposit zones.
This milestone relates to laboratory -based test work and does not involve any changes to site activities .
Southern Cross Gold remains committed to ongoing consultation and transparency with our local community
as the project advances through study phases.
About Sunday Creek
The Sunday Creek epizonal -style gold project is located 60 km north of Melbourne within 16,900 hectares
(“Ha”) of granted exploration tenements. SXGC is also the freehold landholder of 1,054.51 Ha that forms the
key portion in and around the main drilled area at the Sunday Creek Project.
Cumulatively, 181 drill holes for 88,400.67 m have been reported from Sunday Creek since late 2020. Five
holes for 929 m hav e been drilled for geotechnical purposes. An additional 14 holes for 2990.95 m from
Sunday Creek were abandoned due to deviation or hole conditions. Fourteen drillholes for 2,383 m have
been reported regionally outside of the main Sunday Creek drill area. A total of 64 historic drill holes for 5,599
m were completed from the late 1960s to 2008. The project now contains a total of sixty-six (66)
>100 g/t AuEq x m and seventy -three (73) >50 to 100 g/t AuEq x m drill holes by applying a
2 m @ 1 g/t AuEq lower cut.
Our systematic drill program is strategically targeting these significant high-grade vein formations. Initially
these have been defined over 1,500 m str ike of the host from Christina to Apollo prospects, of which
approximately 620 m have been more intensively drill tested (Rising Sun to Apollo). At least 77 ‘rungs’ have
been defined to date, defined by high-grade intercepts (20 g/t to >7,330 g/t Au) along with lower grade edges.
Ongoing step-out drilling is aiming to uncover the potential extent of this mineralized system.
Geologically, the project is located within the Melbourne Structural Zone in the Lachlan Fold Belt. The regional
host to the Sunday Cr eek mineralization is an interbedded turbidite sequence of siltstones and minor
sandstones metamorphosed to sub-greenschist facies and folded into a set of open north-west trending folds.
Further Information
Further discussion and analysis of the Sunday C reek project is available through the interactive Vrify 3D
animations, presentations and videos all available on the SXGC website. These data, along with an interview
on these results with Michael Hudson, President & CEO, can be viewed at www.southerncrossgold.com.
No upper gold grade cut is applied in the averaging and intervals are reported as drill thickness. However,
during future Mineral Resource studies, the requirement for assay top cutting will be assessed. The Company
notes that due to rounding of assay results to one significant figure, minor variations in calculated composite
grades may occur.
Critical Metal Epizonal Gold-Antimony Deposits
Sunday Creek is an epizonal gold-antimony deposit formed in the late Devonian (like Fosterville, Costerfield
and Redcastle), 60 million years later than mesozonal gold systems formed in Victoria (for example Ballarat
and Bendigo). Epizonal deposits are a form of orogenic gold deposit classified according to their depth of
formation: epizonal (<6 km), mesozonal (6-12 km) and hypozonal (>12 km).
Epizonal deposits in Victoria often have associated high levels of the critical metal, antimony, and Sunday
Creek is no exception. China claims a 56 per cent share of global mined supplies of antimony, according to
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NEWS RELEASE
a 2023 European U nion study. Antimony features highly on the critical minerals lists of many countries
including Australia, the United States of America, Canada, Japan and the European Union. Australia ranks
seventh for antimony production despite all production coming fro m a single mine at Costerfield in Victoria,
located nearby to all SXG projects. Antimony alloys with lead and tin which results in improved properties for
solders, munitions, bearings and batteries. Antimony is a prominent additive for halogen -containing flame
retardants. Adequate supplies of antimony are critical to the world's energy transition, and to the high -tech
industry, especially the semi -conductor and defence sectors where it is a critical additive to primers in
munitions.
Antimony represents approximately 21% to 24% in situ recoverable value of Sunday Creek at an AuEq of
2.39 ratio.
In August 2024 the Chinese government announced it would place export limits from September 15, 2024
on antimony and antimony products. This puts pressu re on Western defence supply chains and negatively
affects the supply of the metal and pushes up pricing given China’s dominance of the supply of the metal in
the global markets. This is positive for SXGC as we are likely to have one of the very few large and high-
quality projects of antimony in the western world that can feed western demand into the future.
Antimony Exempt from Executive Order on Reciprocal Tariffs
Southern Cross Gold Consolidated notes that antimony ores and concentrates (HTSUS code 26171000) are
exempt from the April 2, 2025 US Executive Order on Reciprocal Tariffs. The exemption covers antimony
ores and concentrates as well as unwrought antimony, antimony powders, antimony waste and scrap, and
articles of antimony (HTSUS codes 81101000, 81102000, and 81109000).
About Southern Cross Gold Consolidated Ltd. (TSX:SXGC) (ASX:SX2)
Southern Cross Gold Consolidated Ltd. (TSX:SXGC, ASX:SX2) controls the Sunday Creek Gold -Antimony
Project located 60 km north of Melbourne, Australia. Sunday Creek h as emerged as one of the Western
world's most significant gold and antimony discoveries, with exceptional drilling results including 66
intersections exceeding 100 g/t AuEq x m from just 88 km of drilling. The mineralization follows a "Golden
Ladder" structure over 12 km of strike length, with confirmed continuity from surface to 1,100 m depth.
Sunday Creek’s strategic value is enhanced by its dual -metal profile, with antimony contributing
approximately 20 % of the in -situ value alongside gold. This has gai ned increased significance following
China's export restrictions on antimony, a critical metal for defense and semiconductor applications. Southern
Cross’ inclusion in the US Defense Industrial Base Consortium (DIBC) and Australia's AUKUS -related
legislative changes position it as a potential key Western antimony supplier. Importantly, Sunday Creek can
be developed primarily based on gold economics, which reduces antimony -related risks while maintaining
strategic supply potential.
Technical fundamentals further strengthen the investment case, with preliminary metallurgical work showing
non-refractory mineralization suitable for conventional processing and gold recoveries of 92-96% through
gravity and flotation.
With a strong cash position, over 1,000 Ha of strategic freehold land ownership, and a large 60 km drill
program planned through Q3 2025, SXGC is well -positioned to advance this globally significant gold -
antimony discovery in a tier-one jurisdiction.
NI 43-101 Technical Background and Qualified Person
Michael Hudson, President and CEO and Managing Director of SXGC, and a Fellow of the Australasian
Institute of Mining and Metallurgy , and Mr Kenneth Bush, Exploration Manager of SXGC and a RPGeo
(10315) of the Australian Institute of Geosc ientists, are the Qualified Persons as defined by the NI 43 -101.
They have prepared, reviewed, verified and approved the technical contents of this release.
Analytical samples are transported to the Bendigo facility of On Site Laboratory Services (“On Sit e”) which
operates under both an ISO 9001 and NATA quality systems. Samples were prepared and analyzed for gold
using the fire assay technique (PE01S method; 25 g charge), followed by measuring the gold in solution
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NEWS RELEASE
with flame AAS equipment. Samples for multi-element analysis (BM011 and over-range methods as required)
use aqua regia digestion and ICP-MS analysis. The QA/QC program of Southern Cross Gold consists of the
systematic insertion of certified standards of known gold and antimony content, blanks wit hin interpreted
mineralized rock and quarter core duplicates. In addition, On Site inserts blanks and standards into the
analytical process.
Information in this announcement that relates to new metallurgical results contained in this report is based
on information compiled by Mr. Craig Brown, a Fellow of the Australasian Institute of Mining and Metallurgy.
He is the Metallurgical Consultant to Southern Cross Gold Consolidated Ltd. He has sufficient experience
which is relevant to the style of mineralization and types of deposits under consideration and to the activity
being undertaking to qualify as a Competent Person as defined in the 2012 edition of the Australasian Code
for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Co de). Craig Brown
has consented to the inclusion in this report of the matters based on this information in the form and context
in which it appears.
SXGC considers that both gold and antimony that are included in the gold equivalent calculation (“AuEq")
have reasonable potential to be recovered and sold at Sunday Creek, given current geochemical
understanding, historic production statistics and geologically analogous mining operations. Historically, ore
from Sunday Creek was treated onsite or shipped to the Costerfield mine, located 54 km to the northwest of
the project, for processing during WW1. The Costerfield mine corridor, now owned by Mandalay Resources
Ltd contains two million ounces of equivalent gold (Mandalay Q3 2021 Results), and in 2020 was the s ixth
highest-grade global underground mine and a top 5 global producer of antimony.
SXGC considers that it is appropriate to adopt the same gold equivalent variables as Mandalay Resources
Ltd in its 2024 End of Year Mineral Reserves and Resources Press Release, dated February 20, 2025. The
gold equivalence formula used by Mandalay Resources was calculated using Costerfield’s 2024 production
costs, using a gold price of US$2,500 per ounce, an antimony price of US$19,000 per tonne and 2024 total
year metal recoveries of 91% for gold and 92% for antimony, and is as follows:
𝐴𝑢𝐸𝑞 = 𝐴𝑢 (𝑔/𝑡) + 2.39 × 𝑆𝑏 (%)
Based on the latest Costerfield calculation and given the similar geological styles and historic toll treatment
of Sunday Creek mineralization at Costerfield, SXGC considers that a 𝐴𝑢𝐸𝑞 = 𝐴𝑢 (𝑔/𝑡) + 2.39 × 𝑆𝑏 (%) is
appropriate to use for the initial exploration targeting of gold-antimony mineralization at Sunday Creek.
JORC Competent Person Statement
Information in this announcement that relates to new metallurgical results contained in this report is based
on information compiled by Mr. Craig Brown, a Fellow of the Australasian Institute of Mining and Metallurgy.
He is the Metallurgical Consultant to Southern Cross Gold Consolidated Ltd. He has sufficient experience
which is relevant to the style of mineralization and types of deposits under consideration and to the activity
being undertaking to qualify as a Competent Person as defined in the 2012 edition of the Australasian Code
for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code). Craig Brown
has consented to the inclusion in this report of the matters based on this information in the form and context
in which it appears.
The Company confirms that it is not aware of any new information or data that materially affects the
information included in the original document/announcement and the Company confirms that the form and
context in which the Competent Person’s findings are presented have not materially modified from the original
market announcement.
- Ends -
This announcement has been approved for release by the Board of Southern Cross Gold Consolidated Ltd.
For further information, please contact:
Mariana Bermudez – Corporate Secretary - Canada
[email protected] or +1 604 685 9316
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Executive Office: 1305 – 1090 West Georgia Street Vancouver, BC, V6E 3V7, Canada
Nicholas Mead – Corporate Development
[email protected] or +61 415 153 122
Justin Mouchacca, Company Secretary - Australia
[email protected] or +61 3 8630 3321
Subsidiary Office: Level 21, 459 Collins Street, Melbourne, VIC, 3000, Australia
Forward-Looking Statement
This news release contains forward-looking statements. Forward-looking statements involve known and unknown risks,
uncertainties and assumptions and accordingly, a ctual results and future events could differ materially from those
expressed or implied in such statements. You are hence cautioned not to place undue reliance on forward -looking
statements. All statements other than statements of present or historical fact are forward-looking statements. Forward-
looking statements include words or expressions such as “proposed”, “will”, “subject to”, “near future”, “in the event”,
“would”, “expect”, “prepared to” and other similar words or expressions. Factors that could cause future results or events
to differ materially from current expectations expressed or implied by the forward -looking statements include general
business, economic, competitive, political, social uncertainties; the state of capital markets, unforeseen events,
developments, or factors causing any of the expectations, assumptions, and other factors ultimately being inaccurate
or irrelevant; and other risks described in the Company’s documents filed with Canadian or Australian securities
regulatory authorities (under code SX2). You can find further information with respect to these and other risks in filings
made by the Company with the securities regulatory authorities in Canada or Australia (under code SX2), as applicable,
and available for the Company in Canada at www.sedarplus.ca or in Australia at www.asx.com.au (under code SX2).
Documents are also available at www.southerncrossgold.com. The Company disclaims any obligation to update or
revise these forward-looking statements, except as required by applicable law.
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ASX ANNOUNCEMENT
JORC Table 1
Section 1 Sampling Techniques and Data
Criteria JORC Code explanation Commentary
Sampling
techniques
• Nature and quality of sampling (e.g. cut channels, random chips, or specific
specialised industry standard measurement tools appropriate to the minerals
under investigation, such as down hole gamma sondes, or handheld XRF
instruments, etc.). These examples should not be taken as limiting the broad
meaning of sampling.
• Include reference to measures taken to ensure sample representivity and the
appropriate calibration of any measurement tools or systems used.
• Aspects of the d etermination of mineralization that are Material to the Public
Report.
• In cases where ‘industry standard’ work has been done this would be relatively
simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from
which 3 kg was pulverised t o produce a 30 g charge for fire assay’). In other
cases more explanation may be required, such as where there is coarse gold
that has inherent sampling problems. Unusual commodities or mineralization
types (e.g. submarine nodules) may warrant disclosure of detailed information.
• Sampling has been conducted on drill core (half core for >90% and quarter
core for check samples), grab samples (field samples of in -situ bedrock and
boulders; including duplicate samples), trench samples (rock chips, including
duplicates) and soil samples (including duplicate samples).
Locations of field samples were obtained by using a GPS, generally to an
accuracy of within 5 metres. Drill hole and trench locations have been
confirmed to <1 metre using a differential GPS.
Samples locations have also been verified by plotting locations on the high -
resolution Lidar maps
• Drill core is marked for cutting and cut using an automated diamond saw used
by Company staff in Kilmore.
Samples are bagged at the core saw and transported to the Bendigo On Site
Laboratory for assay.
At On Site samples are crushed using a jaw crusher combined with a rotary
splitter and a 1 kg split is separated for pulverizing (LM5) and assay.
• Standard fire assay techniques are used for gold assay on a 30 g charge by
experienced staff (used to dealing with high sulphide and stibnite-rich charges).
On Site gold method by fire assay code PE01S.
• Screen fire assay is used to understand gold grain -size distribution where
coarse gold is evident.
• ICP-OES is used to analyse the aqua regia digested pulp for an additional 12
elements (method BM011) and over-range antimony is measured using flame
AAS (method known as B050).
• Soil samples were sieved in the field and an 80 mesh sample bagged and
transported to ALS Global laboratori es in Brisbane for super -low level gold
analysis on a 50 g samples by method ST44 (using aqua regia and ICP-MS).
• Grab and rock chip samples are generally submitted to On Site Laboratories
for standard fire assay and 12 element ICP-OES as described above.
Drilling
techniques
• Drill type (e.g. core, reverse circulation, open -hole hammer, rotary air blast,
auger, Bangka, sonic, etc.) and details (e.g. core diameter, triple or standard
tube, depth of diamond tails, face -sampling bit or other type, whether core is
oriented and if so, by what method, etc.).
• HQ or NQ diameter diamond drill core, oriented using Axis Champ orientation
tool with the orientation line marked on the base of the drill core by the
driller/offsider.
A standard 3 metre core barrel has been found to be most effective in both the
hard and soft rocks in the project.