Triumph Resource Grows to 150koz Gold
Released
Released
Announcement PDF
ASX Release
4 March 2025
TRIUMPH RESOURCE GROWS TO 150KOZ GOLD.
Dart Mining NL (“Dart” or the “Company”) is pleased to announce a JORC Mineral Resource update of
its recently acquired Triumph project in Queensland. The update takes advantage of previously
reported exploration drilling by Sunshine Metals Limited (ASX: SHN) (Sunshine) after their initial
reporting of the maiden JORC (2012) resource in 2022.
HIGHLIGHTS
•
Triumph Mineral Resource Estimate (MRE) has been increased to 2.16Mt @ 2.17g/t Au for
150koz gold at a 1g/t Au cut-off;
•
The increase represents an 7% uplift in grade and a 27% uplift in contained gold ounces.
•
Drilling information that underpins the MRE update was collected by previous operators and
effectively reduces Dart’s acquisition cost per ounce from $17.0/ounce to $13.3/ounce.
•
Resource represents attractive open pittable targets with 43% of gold ounces within the first
50m at 2.18 g/t Au grade, and 77% of gold ounces within the first 100m at 2.10 g/t Au grade;
•
All Resources are open along strike and at depth and are expected to grow steadily over 2025.
•
Drilling is currently underway to both expand and upgrade MRE at New Constitution.
At an alternative cut-off of 0.5g/t Au, the estimation boasts an impressive 3.35Mt at 1.7g/t Au for
a total of 178koz and would represent a 51% increase in contained gold ounces highlighted by
Grade Tonnage Curve analysis (Figure 2).
Dart is pleased with the uplift in ounces, but more importantly the increase in grade which was
primarily delivered from new intercepts at Bald Hill and the Constitution prospects. A summary
breakdown of the Mineral Resources for Triumph is outlined in Table 1 below. The North and South
Corridor deposits, as well as other prospects within the Triumph project is shown in Figure 1.
Dart Mining NL
ABN: 84 119 904 880
Level 6, 412 Collins Street
Melbourne VIC 3000
Contact: James Chirnside
Email: jchirnside@dartmining.com.au
Mobile: +61 447 447 613
Webpage:
www.dartmining.com.au
LinkedIn: Dart Mining NL
Twitter: @DartMining
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Table 1: Summary of Triumph Mineral Resource Estimate as at 3rd March 20251.
Corridor
Prospect
Category Tonnes (Mt) Grade (g/t)
Big Hans
Inferred
0.46
2.30
New Constitution
Inferred
0.86
2.08
Southern Corridor
South Constitution
Inferred
0.19
2.40
Super Hans
Inferred
0.29
1.78
Sub-total
Inferred
1.80
2.12
Northern Corridor
Bald Hill
Inferred
0.35
2.39
Total
Inferred
2.16
2.17
Contained Au (troy ounces)
33,903
57,635
14,803
16,553
122,894
27,197
150,091
Dart’s observations on the steadily increasing gold price and strong outlook for gold means that Dart
will consider focused preliminary economic studies for the next major Mineral Resource iteration
with the intent determine a more focus, sub-deposit specific cut-off grade where appropriate.
Figure 1 – Plan map showing extents of February 2025 MRE update as well as broader prospects to evaluate.
1 Mineral Resources are reported at a 1 g/t Au cut-off and differences in table may occur in totals due to rounding.
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Triumph Feb 2025 Grade Tonnage Curve
Alternative cut-off grade shows
Triumph estimation at 3.35Mt @ 1.7g/t
Au for 178koz gold
4.50
4.00
3.50
3.00
2.50
Tonnes (Mt)
3.00
2.50
2.00
2.00
1.50
1.50
1.00
Average Grade Au (g/t)
3.50
1.00
0.50
0.50
Tonnes (Mt)
Grade
-
0.25
0.5
0.75
1
1.25
1.5
1.75
2
Cut-off Grade Au (g/t)
Figure 2 – Grade tonnage curve for Triumph Feb 2025 MRE highlighting contained ounces at 0.5g/t Au cut-off.
Darts Chairman, James Chirnside, commented: “Dart is pleased to update shareholders with an
updated MRE for the Triumph project. Taking into account the addition drilling completed prior to
acquisition and applying those results through the resource update, Dart has effectively reduced our
acquisition cost on a dollar per ounce basis.
Dart will continue on with its preliminary 7,000m diamond drilling programme through 2025 to
continue to grow the resource and upgrade the JORC classification. Diamond drilling is progressing
well with the company looking forward to updating shareholders on results in Q1 2025.”
EXPANSION FOCUS – NORTH AND SOUTH CORRIDOR
Existing drill intercept highlights are shown on Figure 3 for the Southern Mineralised Corridor
including the Super Hans, Big Hans, New Constitution and South Constitution resource blocks.
Existing drill intercept highlights are shown on Figure 4 for the Northern Mineralised Corridor
including the Bald Hill resource block and historic Advance mine area. Both areas highlight strong
geophysical extensions which is shown in the background of Figure 3 and Figure 4 by the
chargeability (ASX: MBK Nov 2016, MBK Jan 2017) as well as historical and current drilling intercepting
high grade material. These areas will be a focus for Mineral Resource growth as Dart works through
the numerous targets at Triumph.
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Figure 3 – Existing drill intercept highlights for the Southern Mineralised Corridor including (east to west) the Super Hans, Big Hans,
New Constitution and South Constitution resource blocks with chargeability (geophysics) maps as the background.
Figure 4 - Existing drill intercept highlights the Northern Mineralised Corridor including the Bald Hill resource block, Bald Hill East
and historic Advance mine area with chargeability (geophysics) maps as the background.
RESOURCE – SUPPORTING INFORMATION
Regional Geology
The Triumph Gold Project is located within Yarrol belt of the Wandilla Province (New England
Orogen), where late Permian to Middle Triassic leucocratic intrusives are scattered throughout
Devonian and Carboniferous sediments. It is within one of these intrusives, the Norton Tonalite,
where Triumph is centred.
Lithology
The delineated Triumph Resource is located within the Norton Tonalite. The Norton Tonalite is a
phaneritic intrusive primarily comprised of plagioclase and quartz, with lesser amounts of primary
k-feldspar and biotite. The Tonalite is of Late Permian age to Early Triassic age and is intruded into
Late Devonian sediments of the Wandilla Formation. Further Permian intrusives, such as the Many
Peaks Granite and associated gabbros, are in contact with the Norton Tonalite to the south and east.
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On a local scale, the Norton Tonalite is dissected by numerous brittle faults and shears, as well as
common minor mafic intrusive dykes of dolerite to basaltic composition. Whilst known to be barren,
the relationship between the mafic dykes and the mineralisation is yet unclear. A distinct low
magnetic signature at the core of the Norton Tonalite likely relates to a different intrusive phase,
which is yet to be drill tested.
Structure
The Norton Tonalite is sinistrally offset (in plan) by ~1.8km, by the northwest-trending Norton /
Yarrol Fault – a semi-regional fault which is traced for over 28km. Whilst the fault is clearly postintrusive, it remains unclear whether the fault was active at the time of gold mineralisation.
On a local scale, the Norton Tonalite dissected by two distinct fracture orientations which are both
known to host gold mineralisation. One fracture set is broadly east-west striking, the other
northwest-southeast striking. Both fracture orientations are likely to have formed
contemporaneously.
Alteration and Mineralisation
Gold mineralisation is hosted within quartz-sulphide veins and is broadly associated with pyrite and
arsenopyrite. The veins typically show a sericite (-chlorite) alteration halo, however this appears to
be more associated with the quartz veining itself rather than sulphides.
Targeted drilling during recent programs has focussed on an area known as the “Southern Corridor”.
The Southern Corridor comprises historical workings including Big Hans, Super Hans, New
Constitution, South Constitution and Brigham Young. The Big Hans area is a mineralised trend which
strikes southeast from the third-party mining lease boundary for ~650m. This trend has a number
of historical workings.
Super Hans is an east-west trending zone which continues over 300m. The main zone strikes eastwest whilst possible secondary trends are aligned west-northwest. It is possible that the Big Hans
trend either merges into or is terminated by the Super Hans trend. To the east, it is hypothesised
that the mineralisation is terminated, or more likely offset by, the Norton Fault. The New
Constitution trend also consists of a number of workings in a southeast orientation. The trend
largely consists of two worked zones – a southern and northern. The southern area sits at the
confluence of an east-west trend known as South Constitution. The northern area is located ~320m
northwest and encompasses an area also known as Brigham Young, which was also reported as an
east-west trending zone.
Sampling and Sub-Sampling Techniques
Drill hole data has been composited downhole prior to the geostatistical analysis, continuity
modelling and grade estimation process. A 1m sample composites was used which comprises over
99% of the raw sample lengths, in order to minimise any bias due to inconsistent sample lengths.
Data used comprises Sunshine Gold’s reverse circulation and diamond drilling and historical reverse
circulation and diamond drilling from various operators.
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Drilling Techniques
RC drill holes were collared using an 8-inch hammer bit to a depth of 10m and then reduced to 5.5inch for the remainder of the hole. The metre samples were delivered as an 87.5% (bulk sample) to
12.5% (laboratory sample) split. The laboratory sample was collected in a calico bag, pre-numbered
with a sample ID. The bulk sample was collected in plastic green bags which were pre-numbered
with meterage intervals. The bulk sample was then speared, sieved and washed and then logged by
the rig geologist, who recorded the lithology, alteration, mineralisation, veining, structure and
oxidation. A small representative sample of the interval was then placed into a plastic chip tray
which was marked with the corresponding hole ID and metre interval.
Diamond drilling was HQ size core. Core was orientated where possible then geologically logged and
photographed prior to cutting. Core was half sawn along a cut line when present and collected in
plastic bags with a pre-numbered sample tickets. HQ core was quarter sawn for field duplicate
analysis as per QAQC protocols.
The Mineral Resource is determined from 226 RC and 18 diamond drill holes and is tabulated in
detail in Appendix 3.
Sample Analysis Method
All samples are crushed, dried, pulverised to a nominal 75μm to produce a 50g sub sample for
analysis by Fire Assay/Atomic Absorption Spectroscopy. A further 10 elements (Ag, As, Bi, Cd, Cu,
Fe, Pb, S, Sb and Zn) are routinely assayed for using a four-acid digest with an ICP-AES finish.
Estimation Methodology
Geological wireframes were produced in Leapfrog. The assay data was then hard boundary
composited to limit high-grade or low-grade smearing across individual shears or veins.
Variography, ordinary kriging and block model estimation was completed using Leapfrog Edge.
Cut-Off Grade
Resource wireframes were modelled to 0.25 g/t Au to maximise geological continuity of the veining.
Resources are reported at a 1.0 g/t Au lower cut-off grade which is deemed acceptable based on
approximate industry costings associated with open pit mining and the resultant 2.17g/t Au Mineral
Resource.
Mining and Metallurgical and Other Modifying Factors Considered
Over 75% of the mineral resource estimate is shallower than 100m depth making these mineral
resource estimates appropriate for open-cut mining consideration. Block continuity at the 1g/t cutoff grade is good, with limited isolated “pods” where gold grade is greater than 1g/t gold.
Assumptions made on mining methods for the purpose of this mineral resource were truck and
shovel, open-pit mining operations. No mining dimensions or dilution were considered. Previous
metallurgical test recoveries from New Constitution and Advance cores shows high gold flotation
amenability with an average flotation recovery from the two tests holes of 97.6%. Dart has reviewed
this test work and satisfied with the representivity of those results given their similar performance
to earlier test work. Dart and will continue to collect suitable core samples to further evaluate
metallurgical performance of the Triumph ores.
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Classification
All Resources are currently classified as Inferred. Drill hole intercepts with downhole survey and
assay results (point of observation) is reviewed along strike for continuity of grade and thickness.
Where mineralisation continuity is proven with drilling with up to 40m drill hole spacings, these
zones have been used to support classification of Inferred Mineral Resources.
Figure 5 – Thick slice cross section through New Constitution (South Corridor) MRE and drill hole assays. Cross section represents
typical grades and shape of mineralisation and shows the distribution of grades within the MRE for New Constitution.
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Figure 6 – Thick slice cross section through Bald Hill (North Corridor) MRE and drill hole assays. Cross section represents typical
grades and shape of mineralisation and shows the distribution of grades within the MRE for Bald Hill.
NEXT STEPS
At the Triumph Gold Project, Dart intends to:
•
Continuation of Diamond drilling programme to expand the existing resources along strike
and at depth in accordance with Table 2 below;
•
Undertake regional exploration, targeting the project area, as well as testing bulk tonnage
targets;
•
Continue to review and identify additional prospective target zones for exploration at
Triumph in addition to existing resource areas; and
Continue to review and identify further advanced projects throughout Central Queensland
for potential acquisition or joint venture.
•
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Table 2 – Project timelines assuming a single rig operation only
Approved for release by the Board of Directors.
For more information contact:
James Chirnside
Managing Director
Dart Mining NL
jchirnside@dartmining.com.au
+61 419 605 842
Owen Greenberger
Head of Exploration / Investor Relations
Dart Mining NL
ogreenberger@dartmining.com.au
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About Dart Mining
The Triumph Gold Project is Dart’s first step into an advanced intrusion related gold system project in
Queensland. Dart will look to develop a regional presence in Queensland through advanced stage intrusion
related and epithermal gold projects. Dart Mining will continue to evaluate several historic goldfields in
Central and Northeast Victoria including the Rushworth Goldfield and the new porphyry and lithium province
in Northeast Victoria identified by Dart. The area is prospective for precious, base, and strategic metals. Dart
Mining has built a strategic and highly prospective gold exploration portfolio in Central and Northeast regions
of Victoria, where historic surface and alluvial gold mining indicates the existence of potentially large gold
endowment.
Competent Person’s Statement
The information in this report has been prepared, compiled, and verified by Mr. Owen Greenberger (B.Sc.
Geology), a Competent Person who is a Member of the Australian Institute of Geoscientists. Mr. Greenberger
is Head of Exploration for Dart Mining. Mr. Greenberger has sufficient experience that is relevant to the style
of mineralisation and type of deposits under consideration and to the activity being undertaken 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”. Mr. Greenberger takes responsibility for the exploration
results, and consents to the inclusion in the report of the matters based on his information in the form and
context in which it appears.
Competent Person’s Statement
The information in this report that relates to Mineral Resources is based on information compiled and
reviewed by Mr Andrew Dawes, who is a Member of the Australasian Institute of Mining and Metallurgy and
a Member of the Australian Institute of Geoscientists. Mr Andrew Dawes is employed by AHD Resources and
consults to Dart Mining NL. Mr Andrew Dawes has sufficient experience that is relevant to the style of
mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a
Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Mineral Resources.
Mr Andrew Dawes consents to the inclusion in the report of the matters based on his information in the form
and context in which it appears.
Forward-Looking Statement
Certain statements contained in this document constitute forward-looking statements. Forward-looking
statements include, but are not limited to, Dart Mining’s current expectations, estimates and projections
about the industry in which Dart Mining operates, and beliefs and assumptions regarding Dart Mining’s future
performance. Such forward-looking statements are based on a number of estimates and assumptions made
by the Company and its consultants in light of experience, current conditions and expectations of future
developments which the Company believes are appropriate in the current circumstances. When used in this
document, words such as; “anticipate”, “could”, “intends”, “estimate”, “potential”, “plan”, “seeks”, “may”,
“should”, and similar expressions are forward-looking statements. Although Dart Mining believes that its
expectations presented in these forward-looking statements are reasonable, such statements are subject to
known and unknown risks, uncertainties and other factors, which may cause the actual results, achievements
and performance of the Company to be materially different from the future results and achievements
expressed or implied by such forward-looking statements. Investors are cautioned that forward-looking
information is no guarantee of future performance and accordingly, investors are cautioned not to place
undue reliance on these forward-looking statements.
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APPENDIX ONE
THE TRIUMPH GOLD PROJECT
The Triumph Gold Project (Triumph or Project) is located approximately 520km by road north of
Brisbane, Queensland, and is well serviced by the coastal port city of Gladstone 80km by road to the
north. The Project is comprised of two Exploration Permits: EPM 18486 and EPM 19343 covering an
area of 137.6 sq.km or 43 sub-blocks in total. The Company has recently applied for additional area
immediately adjacent east of the triumph project with EMP 29097.
Figure 7: Location of the Triumph Gold Project
Local Geology
The Triumph Gold Project is located in the Yarrol belt of the Wandilla Province (New England
Orogen), where late Permian to Middle Triassic leucocratic intrusives are scattered throughout
Devonian and Carboniferous sediments. Known mineralisation at Triumph is located within one of
these intrusive bodies, the Norton Tonalite.
The Norton Tonalite is dissected by numerous brittle faults and shears, as well as common minor
mafic intrusive dykes of dolerite to basaltic composition. There is a distinct magnetic low signature
at the core of the Norton Tonalite which is yet to be drill tested (ASX SHN: Robust Maiden Resource at Triumph
Gold Project (31 March 2022)).
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Structure
The Norton Tonalite is sinistrally offset by 1.8km by the northwest-trending Norton Fault, which can
be traced for over 28km. Initially thought to post date mineralisation, a single drill hole has
intersected the interpreted Norton Fault which returned 1m @ 2.9g/t Au and 1m @ 2.2g/t Au (ASX
MKB: Triumph Gold Project Update Amended (25 July 2014) indicating that the fault may have been active during
the main gold mineralisation event.
On a local scale the Norton Tonalite has two distinct fracture orientations that both host gold
mineralisation. One fracture set is approximately east-west striking and the other is northwestsoutheast striking. These fracture orientations are likely to have formed contemporaneously (ASX
SHN: Robust Maiden Resource at Triumph Gold Project (31 March 2022)).
Mineralisation
Gold and silver mineralisation is hosted in quartz-sulphide veins with pyrite and arsenopyrite
forming the bulk of the sulphide. Calcite is abundant in some lodes and present in most or all of
them. Veins typically show sericite-chlorite alteration halos although this appears to be more
associated with quartz veining rather than sulphides. Mineralisation at Triumph is interpreted as an
intrusion related gold system (IRGS) (ASX SHN: Robust Maiden Resource at Triumph Gold Project (31 March 2022)).
Morrison (Intrusion-Related Gold Deposits in North Queensland, GSQ Project final meeting 7th December, 2017)
stated that there were over 130 known IRGS in Queensland with 17 of these having resources over
1 million ounces. Sunshine have stated that Triumph is analogous to the Ravenswood IRGS gold
deposit which has an endowment in excess of 5 million ounces of gold (ASX SHN: Follow Up Drilling at Liontown
(19 June 2024)).
Resource Highlights
The Project is located across the historic Norton Goldfield and has a current JORC (2012) Mineral
Resource Estimate prepared over five prospects in close proximity: Inferred gold resource of
150,091 oz made up of 2,16 million tonnes at a grade of 2.17g/t gold using a 1g/t cut-off (outlined
in this announcement.
More than 75% of the Triumph Inferred resource is within 100m of the surface and largely located
within 1.2km of strike within a 6km long structural corridor (ASX SHN: Follow Up Drilling at Liontown (19 June
2024)). Dart considers that there is potential for proving up mineralisation below current drilling and
open pit depths that may result in underground mining options subject to favourable economic
studies.
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APPENDIX TWO
JORC Code, 2012 Edition – Table 1
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code explanation
Sampling
techniques
• Nature and quality of sampling (eg 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 determination of mineralisation that are
Material to the Public Report.
• In cases where ‘industry standard’ work has been done this
would be relatively simple (eg ‘reverse circulation drilling was
used to obtain 1 m samples from which 3 kg was pulverised to
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 mineralisation types (eg submarine nodules)
may warrant disclosure of detailed information.
Commentary
•
•
•
•
•
Drilling has been mostly Reverse Circulation (RC) drilling with some
complimentary Diamond Drilling (DD) available for the mineral
resource. The drilling has been completed by two companies; Metal
Bank Limited (MBK) and Sunshine Gold Limited (SHN).
Sampling procedures for RC and core drilling conducted by MBK prior
to 2020 are only documented in their ASX announcements under Table
1 and a review of sample lengths for both core and RC indicate
similarities with SHN 2020-2023 work.
For MBK RC holes 1m samples were collected via a cyclone mounted
splitter for all samples. Where moderate to strong alteration was noted
the 1m samples was collected for analysis. In less altered samples the
1m samples were split to create a 4m composite sample for analysis
and the splitter cleaned with compressed air gun after each interval.
From 2020 to 2023, SHN RC drill holes were sampled either as
individual, 1 m length samples from the rig split or as composites
ranging from 2 – 4 m in length. The sample type was designated as per
the Geologist’s discretion – typically unaltered areas were composited,
where those deemed to be altered or mineralised were individually
sampled. Composite samples were collected by the Field Technician
using a spear to provide a quantitative representation of the sample.
Individual metre samples were collected as a 12.5% split collected from
the drill rig.
Both individual and composite RC samples were collected in calico
sample bags and grouped into green plastic bags for dispatch
(approximately five per plastic bag). These were then taken by SHN to a
local freight depot and loaded into cages for transported by freight
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Criteria
JORC Code explanation
Commentary
•
•
•
Drilling
techniques
• Drill type (eg core, reverse circulation, open-hole hammer,
rotary air blast, auger, Bangka, sonic, etc) and details (eg core
diameter, triple or standard tube, depth of diamond tails, facesampling bit or other type, whether core is oriented and if so,
by what method, etc).
•
•
truck to Intertek laboratory, Townsville.
Diamond drill core cutting and sampling was outsourced to ALS Global
(ALS) due to SHN not possessing its own sampling facility. Sample
length averaged 1 m but was adjusted by the Geologist due to notable
geological contacts, structures or due to core loss.
ALS were then provided with a simplified version of the cut sheet,
which showed all sample intervals and location and type (STD, Dup,
Blank) of QAQC samples (but not the specific STD information
pertaining to its identification). Calico bags stamped with the
corresponding sample IDs were provided to ALS. Typically, sample
intervals were a minimum of 20 m either side of the main mineralised
zone. However, if mineralisation was sporadic, likely the majority of the
drill hole was sampled.
All core was half cut by the Technician at ALS to the requirements listed
by SHN. For the automated saw, core pieces were taken from the core
trays and loaded into the respective-sized core cradles. These were
then placed into the core saw feeder and fed through the saw until the
cradle emerges into the exit tray. The core was then placed back into
the core tray. The core was cut a few mm to the right of the orientation
/ cut line as to sample the right-hand side (RHS) of the core and to keep
the left-hand side with the line intact. The core trays with cut samples
were then pushed along roller racks out of the core shed to the sample
station. Typically, the core samples were of 1 m length and sampled
consistently from the RHS with the samples placed into its designated
calico sample bag.
Historical exploration at Triumph has been conducted by various
companies since 1966 onwards. Drilling has included eight holes drilled
by Delhi Australian Petroleum Ltd between 1966 and 1971 and nine
holes by Amoco Minerals Australia Company between 1985 and 1988.
No other significant drilling in the project area is known.
From 2011 to 2019, MBK conducted a substantial exploration program
which included 293 RC and 33 DD holes for a total of 21,345 m of
drilling. In addition, 1,155 shallow bedrock holes for a total of 6,181m
of drilling was completed.
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Criteria
JORC Code explanation
Commentary
•
Drill sample
recovery
• Method of recording and assessing core and chip sample
recoveries and results assessed.
• Measures taken to maximise sample recovery and ensure
representative nature of the samples.
• Whether a relationship exists between sample recovery and
grade and whether sample bias may have occurred due to
preferential loss/gain of fine/coarse material.
•
•
•
•
•
From December 2020 to March 2023, SHN drilled 182 RC and four DD
at the Triumph project area, including one abandoned RC hole, for a
total of 19,403.5 m. The drilling targeted a mineralised trends at the
Bald Hill, Super Hans, Big Hans, New Constitution, and Galena areas
and explored for possible new extensions around South Constitution
and other undrilled areas. Note that the Galena prospect is not
included in this mineral resource.
During MBK programmes, RC sample recoveries of less than
approximately 80% are noted in the geological/sampling log with a
visual estimate of the actual recovery. Very few samples were recorded
with recoveries of less than 80%. No wet RC samples were recovered.
Core recoveries for DD was recorded by measuring the total amount of
core between each core block. This was then compared to the recovery
noted on the core block by the driller and any errors were rectified. The
Rock Quality Designation (RQD) value is calculated by summing the
total length of core in the run composed of pieces of core greater than
10 cm in length. The recovery and RQD are both converted to a
percentage of the recovery during the data entry phase. At this time,
further geotechnical information is recorded such as Longest Unbroken
Piece (LUP) and Rock Strength. The LUP is recorded as the longest piece
of core within each block-to-block interval. The Rock Strength class is
recorded as an average, also between core block to core block.
Fracture count involved counting individual fractures within a drill run.
If the core was crushed and fractures were too numerous to accurately
count, it was given the designation “999” which indicated a highly
fractured zone.
Core photography from the MBK era core drilling contains core blocks
detailing core run recovery but this has not been verified or made
available as digitised data. Core photos for MBK and SHN DD are
available with “Wet” and “Dry” photos.
SHN RC drilling was drilled dry whenever possible to prevent poor
recoveries.
No relationship has been observed between sample recovery and gold
grade.
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Criteria
JORC Code explanation
Logging
• Whether core and chip samples have been geologically and
geotechnically logged to a level of detail to support
appropriate Mineral Resource estimation, mining studies and
metallurgical studies.
• Whether logging is qu
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