Continued Success at Rushworth
Released
Released
Announcement PDF
ASX Release
13th August 2024
FURTHER DRILLING SUCCESS AT RUSHWORTH GOLD PROJECT
VALIDATES EXPLORATION MODEL & STRATEGY
Dart Mining NL (ASX:DTM) (“Dart Mining” or “the Company”) has received more positive results
from the Phase 2 diamond drilling within the company’s 100% owned Rushworth Gold tenement
package.
Results continue to highlight the prospectivity of the Historic Rushworth Goldfield. The ongoing
success of the drilling validates our mineral systems model and supports the company’s ongoing
exploration strategy across a field showing very shallow historic development and very limited
previous deeper drill testing.
HIGHLIGHTS INCLUDE:
•
•
SWDD005 - 1.2m @ 4.5g/t Au from 19.9m downhole, including
o 0.4m @ 8.4g/t Au, and
o 0.3m @ 6.6g/t Au.
Drilling continues at the Phoenix Reef with 2 of a planned 6 holes (1100m) completed
targeting repeating thrust faults at depth.
Chairman, James Chirnside commented:
“Dart’s drilling activities at Rushworth continue to be successful. By leveraging our advanced
mineral systems model and in-depth structural analysis, we have effectively pinpointed highly
prospective targets. Each drill hole has consistently returned positive gold grades, reinforcing the
potential of these identified structures. We remain committed to further advancing our exploration
efforts and are eager to further develop the project’s apparent opportunities”
DRILLING RESULTS DISCUSSION
The first results from the Phase 2 program returned up to 0.24m @ 8.8g/t Au, from
56.2m downhole from hole SWDD004 (Shellback Reef) from within a broad zone of
sulphide mineralisation returning 7.1m @ 0.75g/t Au from 50.8m - ( DTM ASX 23rd July
2024 ) in the Star of the West area. Results from Phase 2 continue to show high grade
results within the targeted Shellback Reef structures with hole SWDD005 showing up to
0.4m @ 8.4g/t Au from 19.9m downhole.
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
1|Page
SWDD005 intersected a steep south dipping thrust fault structure surrounded by apparent
sulphide mineralisation forming a halo of gold results (1.2m @ 4.5g/t Au from 19.9m).
Mineralisation was observed in the drill core as weathered sulphide pitting with surrounding iron
staining, surrounding a quartz reef structure in sandstone lithologies. In line with the results from
hole SWDD004, SWDD005 also intersected at least two zones of gold mineralisation with the weak
lower zone showing up to 0.5m @ 1.1g/t from 94.9m downhole (Figure 3). Lidar interpretation to
the west of holes SWDD004 & SWDD005 illustrates a broad area of extensive surface pitting (Figure
2). SWDD006 results remain outstanding, however given the pleasing results from initial drilling
into the Shellback Reef to date, further drill testing appears to be clearly warranted in the coming
months
The presence of gold rich sulphide mineralisation surrounding thrust faulting is a consistent
observation and supports the company’s interpretation that the mineralising fluid and deposition
environment of the Rushworth region is similar, if not the same, as nearby Central Victorian gold
regions of Fosterville and Costerfield.
RUSHWORTH PHASE 3 DRILLING
Drilling has commenced at the Phoenix Reef prospect with 385m of a planned 1100m drill program
completed to the 7th of August 2024. The Phoenix group of historic workings is one of the more
extensive for the field but still only shows historic workings to some 50m below surface. Drilling is
targeting interpreted deeper repeating thrust faulting below the historic stacked Phoenix,
Fletchers and Appleton’s Reefs exploited for over 1000m of strike from surface.
Figure 1: Phoenix Hill cross-section compiled from geological mapping completed by Jones & Turnbull (2014) and
Boucher (2016). Figure modified from Dart Mining ASX November 2020. Planned drilling location shown in Red.
2|Page
RUSHWORTH STRUCTURAL ARCHITECTURE
The Rushworth goldfield is focused along a series of regional East-West orientated anticline folds
which host shallow historic gold workings along a cumulative strike length of approximately 14km
(Figure 2). The major limbs of the anticline also exhibit smaller scale parasitic folding and various
changes in bedding strike and dip. Significant North-South orientated structures crosscut and
offset East-West bedding and fold hinges along the length of the field.
The East-West orientation of the field is unusual for Victorian Goldfields, which usually trend
North-South, due to the added structural complexity of the Rushworth Region being highly
influenced by the Lachlan Orocline formation and induced North-South crustal shortening
through subduction rollback.
Mineralisation historically exploited at Rushworth concentrated on alluvial mining before focus
shifted to the hard rock source. Mineralisation is dominated by free gold located in quartz veins
hosted within sandstone and shale lithologies.
Mineralisation at Rushworth is comprised of three main structural architecture types.
1. Thrust hosted Quartz Veins. Formed during compressional events where folding has
accommodated as much crustal shortening as it can, thrust faulting then takes over,
utilising planer weakness usually associated with bedding and accommodates further
shortening. Structures progress along limbs of folds and when a hinge zone is intersected,
the fault structures break across the opposite fold limb introducing dilatational areas and
structural complexity of discordant bedding to promote the deposition of gold from the
mineralised fluid. This style of mineralisation is common across central Victoria particularly
at Fosterville, Bendigo and Ballarat fields.
2. North South Veins. Significant mineralised fault structures crosscut the East-West bedding
and thrust hosted quartz veins in a North-South orientation across the Rushworth
Goldfield. During the folding and rollback event of the Lachlan Orocline formation, NorthSouth structures would have formed to accommodate the rotation of the upper crust in the
region.
3. Saddle Reefs. Some historic workings reported exploiting “Bendigo Style” saddle Reefs
where soft shale units deform in a more ductile fashion than the surrounding sandstone
units and produce dilatational saddles in the hinge of the fold. This style of deformation
and mineralisation is particularly evident and reported in historic texts in the Nuggetty Reef
region.
Areas of significant interest for Dart Mining in the Rushworth Goldfield are areas of
structural intersections, i.e. where the Thrust Faults which strike parallel to bedding
intersect the large-scale North-South Structures. The intersection of major structures
provides an increase in structural complexity and opportunity for the further deposition of
gold from mineralised fluids. The intersection can also increase levels of mineralisation
through introducing more mineralising events.
3|Page
Figure 2: Plan image showing Star of the West drilling progress and historic drilling collars
4|Page
Figure 3: SWDD005 cross section looking West
5|Page
Figure 4: Rushworth Tenement location plan
6|Page
Figure 5: Dart Tenement location plan
7|Page
Approved for release by the Board of Directors.
For more information contact:
James Chirnside
Managing Director
Dart Mining NL
jchirnside@dartmining.com.au
+61 447 447 613
Aimee Coates
Investor Relations
Dart Mining NL
acoates@dartmining.com.au
About Dart Mining
Dart Mining (ASX: DTM) has the aim of evaluating and developing several historic goldfields, as well as
substantiating a new porphyry province in Northeast Victoria. The area is prospective for precious, base,
and strategic metals. These include Lithium, Gold, Silver, Copper, Molybdenum, Zinc, Tungsten, Tin,
Tantalum, and a host of other important minerals. Dart Mining has built a strategically placed gold
exploration footprint in the Central and Northeast regions of Victoria, where historic surface and alluvial
gold mining indicates the existence of potentially significant 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 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 forwardlooking statements.
Additional JORC Information
Further details relating and information relating to Dart Mining’s Strategic and Technology metals
exploration programs can be found in Dart Mining’s ASX announcements available on the Company’s
Website.
8|Page
APPENDIX 1
TENEMENT STATUS
All tenement applications continue to pass through the approvals process with the tenements
remaining in good standing as of the 31st July 2024 (Table 1 – Figure 4 & Figure 5).
Table 1. TENEMENT STATUS
Name
Tenement Type
EL5315
Mitta Mitta4&5
Exploration Licence
Area (km2)
Unless
specified
148
EL006016
Rushworth4
Exploration Licence
EL006277
Empress5
Exploration Licence
EL006300
Eskdale3&5
EL006486
Mt Creek5
EL006764
EL006861
Tenement
Number
Interest
Location
100%
NE Victoria
32
100%
Central Victoria
87
100%
NE Victoria
Exploration Licence
96
100%
NE Victoria
Exploration Licence
116
100%
NE Victoria
Cravensville
Exploration Licence
170
100%
NE Victoria
Buckland
Exploration Licence
414
100%
NE Victoria
EL007007
Union
Exploration Licence
3
100%
Central Victoria
EL006994
Wangara
Exploration Licence
190
100%
Central Victoria
EL007008
Buckland West
Exploration Licence
344
100%
NE Victoria
EL007099
Sandy Creek5
Exploration Licence
437
100%
NE Victoria
EL006865
Dart
Exploration Licence)
567
100%
NE Victoria
EL006866
Cudgewa
Exploration Licence
508
100%
NE Victoria
EL007170
Berringama
Exploration Licence
27
100%
NE Victoria
EL007430
Buchan
EL (Application)
546
100%
Gippsland
EL007435
Goonerah
EL (Application)
587
100%
Gippsland
EL008161
Colbinannin
EL (Application)
458
100%
Central Victoria
EL008542
Star of the West
EL (Application)
2
100%
Central Victoria
EL007425
Deddick
Exploration Licence
341
100%
Gippsland
EL007428
Boebuck
Exploration Licence
355
100%
NE Victoria
EL007426
Walwa
Exploration Licence
499
100%
NE Victoria
EL007754
Tallandoon5
Exploration Licence
88
100%
NE Victoria
RL006615
Fairley’s2
Retention License
340 Ha
100%
NE Victoria
RL006616
Unicorn1&2
Retention License
23,243 Ha
100%
NE Victoria
EL9476
Woomargama
Exploration Licence
85
100%
New South Wales
EL9516
Brewarrina
Exploration Licence
185
100%
New South Wales
All tenements remain in good standing as of 31 July 2024.
NOTE 1: Unicorn Project area subject to a 2% NSR Royalty Agreement with Osisko Gold Royalties Ltd dated 29
April 2013.
NOTE 2: Areas subject to a 1.5% Founders NSR Royalty Agreement.
NOTE 3: Areas are subject to a 1.0% NSR Royalty Agreement with Minvest Corporation Pty Ltd (See DTM ASX
Release 1 June 2016).
NOTE 4: Areas are subject to a 0.75% Net Smelter Royalty on gold production, payable to Bruce William
McLennan.
NOTE 5: Tenements subject to conditions noted in the SQM earn-in agreement (Dart Mining ASX December 2022
SQM Earn-In)
9|Page
APPENDIX 2
Table 1: Phase 2 Drilling Collars
Hole ID
Inclination
Azimuth
(Magnetic)
Achieved Hole
Depth (m)
Surveyed
Easting
Surveyed
Northing
Surveyed
Elevation_m
(RL)
GHDD002
SWDD001
SWDD002
SWDD003
SWDD004
SWDD005
SWDD006
SWDD007
HHDD001
-70.4
-60.2
-60.1
-59
-60.8
-59.9
-60.4
-60
-60.9
91.1
45
17.2
102.3
317.6
296.7
326.3
300
162.3
102.5
60.7
61.2
61.1
202.9
176.7
149.7
170.0
200.0
321996.9
320459.8
320458.3
320459.7
321673.0
321673.7
5948605.0
5948605.0
5948417.9
5948697.9
5948761.9
5948761.4
5948758.9
5948653.4
5948653.0
321590.0
321590.0
320000.4
195.2
154.0
154.1
154.2
172.7
172.8
174.0
174.0
164.0
*Grey highlights planned details
Table 2: Phase 2 Drilling Significant Intercepts
Hole ID
From
(m)
SWDD005
Inc.
Inc.
SWDD005
SWDD005
SWDD005
19.9
19.9
20.7
82.0
87.5
94.9
To
(m)
21.0
20.2
21.0
82.5
88.0
95.4
Length
(m)
Grade
(Au ppm)
1.2
0.4
0.3
0.5
0.5
0.5
4.5
8.4
6.6
1.0
0.5
1.1
10 | P a g e
APPENDIX 3
JORC CODE, 2012 EDITION – TABLE 1
SECTION 1 SAMPLING TECHNIQUES AND DATA
Criteria
JORC Code Explanation
Sampling techniques
•
•
•
•
Drilling techniques
•
Drill sample recovery
•
•
•
Logging
•
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 determination of mineralisation 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 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 (e.g. submarine nodules)
may warrant disclosure of detailed information.
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.).
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.
Whether core and chip samples have been geologically and
geotechnically logged to a level of detail to support appropriate Mineral
Commentary
•
Diamond drilling was utilised to obtain NQ2 sized drill core which was logged in
detail at the Dart Core farm in Wodonga
• Zones of expected mineralisation, and zones showing visual prospectivity during
logging were split into a minimum 0.15m to maximum 0.5m sample intervals
• In interpreted unmineralized samples were not submitted for analysis.
• Sample intervals were whole core sampled
• Samples were submitted to Onsite Laboratories in Bendigo for Photon Assay
analysis
o Samples were crushed and pulverised to 90% passing 75 microns
o Samples wer rotary split into approximate 300gm sub samples
o Samples were passed through the Photon Assay machine for final
gold analysis.
• Certified Reference Materials OREAS 233, OREAS 235, OREAS 237, OREAS 277, and
OREAS 279 as well as CRM blank OREAS 22h were inserted a nominal 20 samples as
part of a QA/QC system.
• Whole core sampling, and the large subsample size of the Photon Assay technique
were utilised to combat the expected nuggerty nature of mineralisation at the
Rushworth Project.
• Diamond Drilling (Core) is of NQ2 (50.6mm diameter) from surface. Drill holes are
angled, and core is orientated (Reflex Tool) to allow structural interpretation
• Holes surveyed using an Trushot downhole camera, with 3m multishot survey
completed at the End of Hole
•
Drill core recovery is recorded for each drill interval recorded by the driller. The
drilled interval (recorded on core blocks) and the recovered interval (measured
during logging) are recorded in the company drill log database and recovery is
calculated as a percentage.
•
Drill core initial summary lithology logging is carried out to allow subsequent hole
planning and to track hole geology against hole plan.
11 | P a g e
•
Sub-sampling
techniques and sample
preparation
•
•
•
•
•
•
•
Quality of assay data
and laboratory tests
•
•
•
Verification of
sampling and assaying
•
•
•
•
Location of data points
•
Resource estimation, mining studies and metallurgical studies.
Whether logging is qualitative or quantitative in nature. Core (or
costean, channel, etc.) photography.
The total length and percentage of the relevant intersections logged.
If core, whether cut or sawn and whether quarter, half or all core taken.
If non-core, whether riffled, tube sampled, rotary split, etc. and whether
sampled wet or dry.
For all sample types, the nature, quality and appropriateness of the
sample preparation technique.
Quality control procedures adopted for all sub-sampling stages to
maximise representivity of samples.
Measures taken to ensure that the sampling is representative of the in
situ material collected, including for instance results for field
duplicate/second-half sampling.
Whether sample sizes are appropriate to the grain size of the material
being sampled.
The nature, quality and appropriateness of the assaying and laboratory
procedures used and whether the technique is considered partial or
total.
For geophysical tools, spectrometers, handheld XRF instruments, etc.,
the parameters used in determining the analysis including instrument
make and model, reading times, calibrations factors applied and their
derivation, etc.
Nature of quality control procedures adopted (e.g. standards, blanks,
duplicates, external laboratory checks) and whether acceptable levels of
accuracy (i.e. lack of bias) and precision have been established.
•
•
•
•
•
•
•
•
Detailed geological logging of all drill core includes recording of recovery,
weathering, lithology, alteration, mineralization and RQD.
All drill core is photographed prior to sampling. This logging is qualitative.
100% of the drilling was logged.
Samples were submitted to ALS Chemex and analysed for a suite of trace elements
using ALS Methods ME-ICP89 and ME-MS91 (a peroxide leach is considered a total
extraction technique for lithium). These techniques are appropriate and
considered a total extraction technique for key metals Rb, Nb, Sn, Nb, Ta, Cs and Li.
Samples were whole sample crushed, pulverised to P85 at 75um and assayed by
ALS methods ME-ICP89 and ME-MS91.
ALS conducted their own internal laboratory checks.
Laboratory blanks, standards are reviewed per batch to monitor accuracy and
precision.
•
The verification of significant intersections by either independent or •
alternative company personnel.
•
The use of twinned holes.
Documentation of primary data, data entry procedures, data verification,
data storage (physical and electronic) protocols.
•
Discuss any adjustment to assay data.
•
•
•
•
Geological logging is completed by experienced geologists
The laboratory supplies all assay data as an export to a CSV file. The raw data is
edited to separate all duplicates and CRM results into a QA/QC tab in the CSV file
and reviewed.
Verification of significant intersections were made by alternative company
personnel.
No independent review of assay data has been carried out.
Geological data is logged quality controlled spreadsheet and checked.
Electronic-only assay data is imported into a database from the laboratory’s
electronic data.
No holes were twinned at this early exploration stage.
Accuracy and quality of surveys used to locate drill holes (collar and down- •
hole surveys), trenches, mine workings and other locations used in Mineral
The location of drill hole collars were confirmed with a Trimble DA2 receiver and
Catalyst 0.3m Subscription set to MGA94 Grid Datum (Zone 55)
12 | P a g e
•
•
Resource estimation.
Specification of the grid system used.
Quality and adequacy of topographic control.
•
•
•
•
Sample security
•
•
Data spacing for reporting of Exploration Results.
•
Whether the data spacing and distribution is sufficient to establish the
degree of geological and grade continuity appropriate for the Mineral •
Resource and Ore Reserve estimation procedure(s) and classifications
applied.
Whether sample compositing has been applied.
Whether the orientation of sampling achieves unbiased sampling of possible •
structures and the extent to which this is known, considering the deposit
type.
If the relationship between the drilling orientation and the orientation of key •
mineralised structures is considered to have introduced a sampling bias, this
should be assessed and reported if material.
•
The measures taken to ensure sample security.
Audits or reviews
•
The results of any audits or reviews of sampling techniques and data.
Data spacing and
distribution
Orientation of data in
relation to geological
structure
•
•
•
•
•
•
•
Accuracy is variable but is expected to be 0.3m
During the mapping and Collar pickup process with constant visual quality
assessment conducted, the receiver maintained an accuracy level <0.4m.
Elevation
Down hole, multi-shot surveys were taken at 15m then a nominal 30 m interval
where possible using a Trueshot survey tool. A 3m multi-shot survey was
conducted at end of hole.
Drill sites were restricted to existing tracks. It was not intended to establish a drill
spacing for resource estimation although these holes can be used at a later date.
Drill core sampling minimum 0.15m and maximum 0.5m with sampling to
lithological and mineralogical boundaries and is considered appropriate for the
style of mineralisation.
Drilling was restricted to existing tracks and pads. However, in all cases it was
possible to drill at a high angle to the host structures and achieve a suitable
orientation that crosscuts the expected mineralised orientation.
Drill transects were oriented perpendicular across the known trend of major
structures.
All samples submitted for analysis are placed in sealed poly-weave bags and
delivered to the laboratory by Dart Staff
An internal review of procedures, operations, sampling techniques and analytical
techniques was made by Dart Mining.
No external review of sampling or results has been undertaken at this early stage
of exploration.
13 | P a g e
SECTION 2 REPORTING OF EXPLORATION RESULTS
Criteria
Mineral tenement
and land tenure
status
JORC Code Explanation
Commentary
•
Type, reference name/number, location and ownership including agreements
or material issues with third parties such as joint ventures, partnerships,
overriding royalties, native title interests, historical sites, wilderness or
national park and environmental settings.
The security of the tenure held at the time of reporting along with any known
impediments to obtaining a licence to operate in the area.
•
•
All tenements remain in good standing as of 1st June 2024
Details of Dart Mining tenements shown in Appendix 2 and Figure 4 and Figure 5
Acknowledgment and appraisal of exploration by other parties.
•
Gold was discovered in Rushworth in August 1853, and for several years
production was from alluvial workings. This developed into reef workings by 1860.
Mining had almost completely ceased by 1914 and attempts to revitalise the
goldfield since have been met with no success.
Garratt (1985) calculated at least 97,000 oz of gold was produced from the
Rushworth Goldfield, with a further 40,000 oz from the Whroo Goldfield 6km to
the south of Rushworth. These figures are considered an absolute minimum for
production due to poor record keeping prior to the 1860’s and the number of
small, unrecorded workings in the district.
A detailed soil sampling survey of over 1200 samples were collected across a 6
km2 area by New Holland Mining N. L.
A series of 26 RAB holes were drilled across the Nuggety Hill – Specimen Hill
prospect by New Holland Mining N.L. in 1993. Several significant intersections
were identified, including 3m at 10.1 g/t, 3m at 3.16 g/t, and 3m at 3m at 2.83 g/t.
The highest grades typically occurred between 50-60m down hole, and grade
often displayed gold enrichment near the surface and approaching the water
table. Notably, drilling stopped at the water table.
In 1994 New Holland Mining N. L. drilled 909m across 14 RAB drill holes across the
Star of the West prospect, and 896m across 12 RC holes on the Nuggety prospect,
924m were drilled across 14 RC holes on the Fletchers Reef section of the Phoenix
prospect. A review and resampling of soil grids across workings and various
prospects showed little correlation between gold bearing structures and gold
grade, suggesting soil sampling is of limited utility in identifying mineralisation.
Dart Mining completed an RC drilling campaign at Phoenix Hill in 2021 and
reported results to the ASX (DART MINING ASX April 2021)
EL006016 is located in the Melbourne structural zone of the Lachlan Fold Belt in
central Victoria. The EL is underlain by metamorphosed Upper Silurian to Lower
Devonian age Melbourne Group sediments.
A Bendigo-style mineralisation model in folded turbidite sequence with late-stage
brittle faulting and late gold mineralisation is interpreted across the Phoenix HillAppleton’s-Chinaman’s Hill prospect at Rushworth, with nuggety gold
•
Exploration done
by other parties
•
•
•
•
•
•
Geology
•
Deposit type, geological setting and style of mineralisation.
•
•
14 | P a g e
•
Drill hole
Information
•
•
Data aggregation
methods
•
•
•
Relationship
between
mineralisation
widths and
intercept lengths
Diagrams
•
•
•
•
A summary of all information material to the understanding of the
exploration results including a tabulation of the following information for all
Material drill holes:
o easting and northing of the drill hole collar
o elevation or RL (Reduced Level – elevation above sea level in metres) of
the drill hole collar
o dip and azimuth of the hole
o down hole length and interception depth
o hole length.
If the exclusion of this information is justified on the basis that the
information is not Material and this exclusion does not detract from the
understanding of the report, the Competent Person should clearly explain
why this is the case.
In reporting Exploration Results, weighting averaging techniques, maximum
and/or minimum grade truncations (e.g. cutting of high grades) and cut-off
grades are usually Material and should be stated.
Where aggregate intercepts incorporate short lengths of high-grade results
and longer lengths of low-grade results, the procedure used for such
aggregation should be stated and some typical examples of such
aggregations should be shown in detail.
The assumptions used for any reporting of metal equivalent values should be
clearly stated.
These relationships are particularly important in the reporting of Exploration
Results.
If the geometry of the mineralisation with respect to the drill hole angle is
known, its nature should be reported.
If it is not known and only the down hole lengths are reported, there should
be a clear statement to this effect (e.g. ‘down hole length, true width not
known’).
•
Appropriate maps and sections (with scales) and tabulations of intercepts
should be included for any significant discovery being reported These should
include, but not be limited to a plan view of drill hole collar locations and
appropriate sectional views.
•
•
•
•
•
•
•
•
mineralisation observed on thrust-fault related flat veins, saddle reefs and AC
joints.
The exploration rationale applied by Dart Mining is in line with the significant work
previously undertaken across the tenement, targeting large thrust fault style reef
systems and cross course faults, known to show high grade mineralisation and
having potential for large tonnage stockwork-related gold mineralisation.
All drillhole data (location, RL, azimuth, dip, depth etc.) for this drilling program,
and significant assay intercepts are presented in appendix 2
The length weighted average gold content across the the full intersection width in
each drill hole that has a continuous intersection of elevated gold grades greater
than 0.2g/t Au
The nominal sample length is 0.5m with a limited freque
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