Further Base Metal Mineralisation from Tiger
Released
Released
Announcement PDF
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ASX ANNOUNCEMENT 29 October 2024
Further Base Metal Mineralisation from Tiger – Mangaroon (100%)
HIGHLIGHTS
•
Assays have been received for all 7 RC holes (1,086m) in the follow up drilling program at Tiger
with significant intercepts including:
TIGERC013: 26m @ 1.5% Zn, 0.3% Cu, 0.5% Pb, 20.2g/t Ag, 0.2g/t Au from 30m incl.
7m @ 3.1% Zn, 0.5% Cu, 0.4% Pb, 15.7g/t Ag, 0.3g/t Au from 33m and
2m @ 1.5% Zn, 0.2% Cu, 0.1% Pb, 13.6g/t Ag 0.1g/t Au from 94m and
3m @ 0.5% Cu, 2.5g/t Ag from 121m
TIGERC011: 20m @ 0.4% Zn, 0.1% Cu, 0.2% Pb, 6.8g/t Ag, 0.1g/t Au from 1m incl.
2m @ 1.7% Zn, 0.3% Cu, 1.1% Pb, 39.3g/t Ag, 0.1g/t Au from 8m
•
These are in addition to previously announced results including:
TIGERC003: 12m @ 3.6% Zn, 0.5% Cu, 0.4% Pb, 13.4g/t Ag, and 0.1g/t Au from 31m incl.
6m @ 5.4% Zn, 0.6% Cu, 0.3% Pb, 16.6g/t Ag from 32m incl.
2m @ 5.6% Zn, 1.1% Cu, 0.3% Pb, 11.7g/t Ag from 35m and
6m @ 1.4% Zn, 0.4% Cu, 0.9% Pb, 11.5g/t Ag, and 0.2g/t Au from 18m
TIGERC002: 9m @ 1.4% Zn, 0.3% Cu, 0.3% Pb, 11.5g/t Ag, and 0.1g/t Au from 31m incl.
1m @ 3.3% Zn, 0.8% Cu, 0.9% Pb, 31.0g/t Ag, and 0.3g/t Au from 32m and
2m @ 3.7% Zn, 0.5% Cu, 0.6% Pb, 23.3g/t Ag, and 0.3g/t Au from 37m
TIGERC005: 2m @ 2.0% Zn, 0.2% Cu, 0.8% Pb, 32.5g/t Ag and 0.3g/t Au from 54m
•
This program was supported by co-funding from the WA Government’s merit-based
Exploration Incentive Scheme (“EIS”) and a drill for equity agreement with Topdrill Pty Ltd.
Dreadnought Resources Limited (“Dreadnought”) is pleased to announce assay results from
RC drilling at the Tiger Cu-Au-Zn-Ag prospect, part of the Mangaroon Gold project, located
in the Gascoyne Region of Western Australia.
Dreadnought’s Managing Director,
Dean Tuck, commented: “Tiger has
delivered exciting, near surface, results
and is only one of a number of large,
base metals/gold targets at Mangaroon.
These targets will be systematically
tested to determine their priority in our
overall gold commercialisation strategy.
Accordingly, the large camp scale
prospects at Bordah and High Range
will be advanced in parallel with ongoing
target definition work around the Star of
Mangaroon.”
Figure 1: Photo of the Topdrill RC rig
drilling at Tiger.
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Overview of Drilling: Tiger Cu-Au-Zn-Ag Prospect (100%)
Tiger is defined by a ~500m long sub-cropping gossanous horizon within a coincident ~900m x 300m Cu-Au-Zn-Ag and
pathfinder-in-soil anomaly. The Cu-Au-Zn-Ag gossans appear to have formed after massive sulphides and, given the strong
pathfinder association, are considered to be related to VMS style or intrusion-related mineralisation.
First Program (8 RC holes, 1,456m): The first ever program at Tiger tested the ~500m strike of sub-cropping gossanous
horizon. Drilling generally intersected multiple zones of base metals and chlorite-sericite-magnetite-carbonate alteration
within a meta-sedimentary sequence before going into a footwall intrusion. Significant intercepts included:
TIGERC003: 12m @ 3.6% Zn, 0.5% Cu, 0.4% Pb, 13.4g/t Ag, and 0.1g/t Au from 31m incl.
6m @ 5.4% Zn, 0.6% Cu, 0.3% Pb, 16.6g/t Ag from 32m incl.
2m @ 5.6% Zn, 1.1% Cu, 0.3% Pb, 11.7g/t Ag from 35m and
6m @ 1.4% Zn, 0.4% Cu, 0.9% Pb, 11.5g/t Ag, and 0.2g/t Au from 18m
TIGERC002: 9m @ 1.4% Zn, 0.3% Cu, 0.3% Pb, 11.5g/t Ag, and 0.1g/t Au from 31m incl.
1m @ 3.3% Zn, 0.8% Cu, 0.9% Pb, 31.0g/t Ag, and 0.3g/t Au from 32m and
2m @ 3.7% Zn, 0.5% Cu, 0.6% Pb, 23.3g/t Ag, and 0.3g/t Au from 37m
TIGERC005:2m @ 2.0% Zn, 0.2% Cu, 0.8% Pb, 32.5g/t Ag and 0.3g/t Au from 54m
In addition to the to the Cu-Au-Zn-Ag mineralisation, significant W-Ag-Au mineralisation was also intersected including:
TIGERC001:1m @ 0.3% WO3, 31.8g/t Ag and 0.8g/t Au from 26m
Figure 2: Plan view image of Tiger showing the location of recent drilling in relation to off-hole conductors and rock chip assays along the
~500m of mapped gossanous horizons and Cu-Au-Zn-Ag soil contours.
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Downhole surveys (magnetometric resistivity “DHMMR” and electromagnetic “DHEM”) conducted after the first drill
program identified geophysical conductors that were tested in a second, follow up program.
Second Program (7 RC holes, 1,086m): This follow up program tested off hole conductors as well as conducting extensional
and infill drilling. Significant intercepts included:
TIGERC013: 26m @ 1.5% Zn, 0.3% Cu, 0.5% Pb, 20.2g/t Ag, 0.2g/t Au from 30m incl.
7m @ 3.1% Zn, 0.5% Cu, 0.4% Pb, 15.7g/t Ag, 0.3g/t Au from 33m and
2m @ 1.5% Zn, 0.2% Cu, 0.1% Pb, 13.6g/t Ag 0.1g/t Au from 94m and
3m @ 0.5% Cu, 2.5g/t Ag from 121m
TIGERC011: 20m @ 0.4% Zn, 0.1% Cu, 0.2% Pb, 6.8g/t Ag, 0.1g/t Au from 1m incl.
2m @ 1.7% Zn, 0.3% Cu, 1.1% Pb, 39.3g/t Ag, 0.1g/t Au from 8m
Sulphide species also generally showed a distinct zonation with a core of mixed sphalerite, chalcopyrite and galena with more
chalcopyrite-rich possible stringer zones and more distal sphalerite-galena mineralisation in some holes. Mineralisation is
interpreted to have a westerly plunge and remains open in all directions.
Drilling was supported by a co-funding EIS grant of up to $150,000 and a drill for equity agreement with Topdrill Pty Ltd.
Conclusions and Next Steps
Tiger is the first gold / base metal target generated by Dreadnought to be drill tested and has delivered near surface base
metal mineralisation and opened up the project area for a new style of mineralisation. A result of this early success is to
prioritise target generation
and definition work across
Mangaroon to build a
pipeline of quality targets
to rank and pursue.
Future work at Tiger
consists of down hole
geophysical surveys to test
for off hole conductors and
diamond drilling to collect
structural
information.
Downhole
geophysical
survey of these holes will
be undertaken in late 2024
or early 2025 and with
diamond drilling planned
for early 2025.
Figure 3: Cross
section image of
Tiger showing the
location of recent
drilling in relation to
off-hole conductors,
outcropping and
interpreted geology.
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UPCOMING NEWSFLOW
October/November: Results from diamond drilling at the Star of Mangaroon (100%)
October/November: Results from airborne geophysical surveys at Mangaroon (100%)
October: Quarterly Activities and Cashflow Report
November: Results of further target generation and definition work at Mangaroon Au (100%)
November: Results from EIS co-funded IP surveys at Tarraji-Yampi (80%/100%)
November: Results from Au drilling at Mangaroon (100%)
November: Initial Mineral Resource for Star of Mangaroon (100%)
28 November: Annual General Meeting
December: Results of further target generation and definition work at Mangaroon Au (100%)
~Ends~
For further information please contact:
Dean Tuck
Managing Director
Dreadnought Resources Limited
E: dtuck@dreres.com.au
Jessamyn Lyons
Company Secretary
Dreadnought Resources Limited
E: jlyons@dreres.com.au
This announcement is authorised for release to the ASX by the Board of Dreadnought.
For further information please refer to previous ASX announcements:
• 25 November 2020
Mangaroon Ni-Cu-PGE & Au Project
• 15 March 2021
Exploration Commences at Mangaroon Ni-Cu-PGE & Au Project
• 7 April 2021
Option/JV Agreement Signed with Global Base Metal Miner
• 17 May 2021
Update on Mangaroon Ni-Cu-PGE & Au Project
• 12 September 2022
Star of Mangaroon Acquisition & Consolidation
• 7 June 2023
Mangaroon Gold Review and Further Consolidation
• 4 September 2023
Outstanding Gold Opportunities Along >10km Mangaroon Shear Zone
• 1 November 2023
Gold Drilling Commenced at Star of Mangaroon
• 11 December 2023
Thick, High-Grade Gold Including 7m @ 23.0g/t Au
• 22 January 2024
Star of Mangaroon Extended
• 12 February 2024
Star of Mangaroon Camp Scale Prospect Continues to Expand
• 13 March 2024
Star of Mangaroon Camp Scale Gold Prospect Expands to ~15km x 10km
• 20 May 2024
Outcropping Cu-Zn-Ag-Au Gossans at Tiger
• 27 May 2024
High Grade Cu-Zn-Ag-Au Gossans at Tiger
• 18 June 2024
Tiger Cu-Au-Zn-Ag Gossan Confirmed over 500m
• 15 August 2024
Visual Sulphides in Tiger Cu-Au-Zn-Ag Drilling
• 2 September 2024
Drill Results & 5 Off-Hole Conductors at Tiger
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SNAPSHOT – MANGAROON GOLD (100%)
Mangaroon Gold is 100% Owned by Dreadnought
•
>5,300km2 of highly prospective ground. Initial focus is on the ~15km x 10km gold and base metals system
situated over the Mangaroon Shear Zone between the crustal scale Minga Bar and Edmund Faults with
multiple phases of intrusions.
•
Genuine camp scale potential with 5 historical mines (Star of Mangaroon, Popeye, Two Peaks, Lead and
Pritchard Well) developed on outcropping mineralisation and numerous historical workings along the
Mangaroon Shear Zone which have only seen limited, shallow drilling along ~200m of strike near the Star of
Mangaroon mine.
Transformation into a self-funded explorer
•
Potential high-grade open pit at the Star of Mangaroon is being progressed whereby funding, development,
haulage & processing is to be outsourced to third parties. This is a common model in WA given the robust
gold price and, once successful, could be extended to Popeye, Two Peaks, Lead, Pritchard Well etc.
Consolidation Provides for First Ever Modern Exploration
•
All historical workings and occurrences were discovered by pastoralists and prospectors over outcropping
mineralisation. There has been minimal historical and modern exploration due to fractured, small-scale
ownership. Large scale modern exploration is now being undertaken for the first time under Dreadnought’s
consolidated ownership.
•
Dreadnought is deploying modern geochemical and geophysical techniques to explore for mineralisation
under shallow cover. Initial geochemical and geophysical surveys have already generated new prospects with
stronger and larger signatures than the historical mines, including the region’s largest high-grade producer
at the Star of Mangaroon mine.
Shallow, High-grade, Au-Ag Potential
•
•
The Star of Mangaroon mine contains significant shallow high-grade gold intersections including (ASX: 6 Jun 2023,
4 Sep 2023, 11 Dec 2023, 22 Jan 2024):
MA10: 4m @ 26.0 g/t Au from 9m
MA17: 7m @ 14.3 g/t Au from 21m
SOMRC004: 9m @ 13.4 g/t Au from 9m
SOMRC005: 7m @ 23.0 g/t Au from 53m
SOMRC006: 8m @ 15.5 g/t Au from 89m
SOMDD001: 1.4m @ 87.9 g/t Au from 16m
Rock chip results from regional prospects and historical workings include:
MNRK0515: 74.8 g/t Au (Diamond)
TPRK05: 41.7 g/t Au (Two Peaks)
SM7: 121.2 g/t Au, 179 g/t Ag (Popeye)
RNLYD048: 30.1 g/t Au, 552 g/t Ag (Popeye)
Emerging Cu-Au-Zn-Ag System
•
Sub-cropping gossans covering a >500m strike length highlight the potential for a substantial base metals
system with recent rock chips at Tiger including (ASX: 20 May 2024, 20 May 2024, 18 Jun 2024):
TIG006: 4.3% Cu, 1.4% Zn, 22.5g/t Ag and 0.2g/t Au
TIG010: 2.2% Cu, 7.9% Zn, 30.5g/t Ag and 0.2g/t Au
TIG013: 1.9% Cu, 17.5% Zn, 289.0g/t Ag and 0.3g/t Au
TIG026: 8.7% Cu, 9.0% Zn, 40.7g/t Ag and 1.0g/t Au
TIG027: 10.5% Cu, 4.6% Zn, 16.3g/t Ag and 1.0g/t Au
TIG025: 2.4% Zn, 6.3% Pb, 409.0g/t Ag and 0.1g/t Au
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INVESTMENT HIGHLIGHTS
Mangaroon Au, Nb-REE, Ni-Cu-PGE Project (100%)
Mangaroon covers ~5,300kms2 and is located 250kms
south-east of Exmouth in the Gascoyne Region of WA.
At Mangaroon, Dreadnought has consolidated areas of
outcropping high-grade gold and historical high grade
gold mines including the historic Star of Mangaroon and
Diamond gold mines. Exploration at the Money Intrusion
has identified high tenor Ni-Cu-PGE sulphides. In
addition, Mangaroon has emerged as a globally
significant, rapidly growing, potential source of critical
minerals. Highlights include:
•
An independent Resource for Yin Ironstones
Complex of 29.98Mt @ 1.04% TREO over only
~4.6kms – including a Measured and Indicated
Resource of 26.3Mt @ 1.04% TREO (ASX 30 Nov
2023).
•
Discovery of the globally significant, Nb-REE-P-TiSc enriched Gifford Creek Carbonatite (ASX 7 Aug
2023).
•
A large, independent initial Resource of 10.84Mt @
1.00% TREO at the Gifford Creek Carbonatites,
containing a range of critical minerals including rare
earths, niobium, phosphate, titanium and scandium
(ASX 28 Aug 2023).
Kimberley Ni-Cu-Au Project (80/100%)
The project is located only 85kms from Derby in the
West Kimberley region of WA and was locked up as a Defence Reserve since 1978.
The project has outcropping mineralisation and historical workings which have seen no modern exploration.
Results to date indicate that there may be a related, large scale, Proterozoic Cu-Au VMS system at Tarraji-Yampi,
similar to DeGrussa and Monty in the Bryah Basin.
Central Yilgarn Gold, Base Metals, Critical Minerals & Iron Ore Project (100%)
Central Yilgarn is located ~190km northwest of Kalgoorlie in the Yilgarn Craton. The project comprises ~1,400kms2
covering ~150km of strike along the majority of the Illaara, Yerilgee, South Elvire and Evanston greenstone belts.
Central Yilgarn is prospective for typical Archean mesothermal lode gold deposits, VMS base metals, komatiitehosted nickel sulphides and critical metals including Lithium-Cesium-Tantalum.
Prior to consolidation by Dreadnought, the Central Yilgarn was predominantly held by iron ore explorers and
remains highly prospective for iron ore.
Bresnahan HREE-Au-U Project (100%)
Bresnahan is located ~125km southwest of Newman in the Ashburton Basin. The project comprises ~3,700kms2
covering over 200kms strike along the Bresnahan Basin / Wyloo Group unconformity. Bresnahan is prospective for
unconformity related heavy rare earth (“HREE”) deposits similar to Browns Range HREE deposits, unconformity
uranium (“U”) deposits and mesothermal lode gold similar to Paulsens Au-Ag-Sb deposits along strike.
Prior to consolidation by Dreadnought, the Bresnahan Basin had been successfully explored for unconformity
uranium with limited exploration for mesothermal gold. Bresnahan is a first mover opportunity to explore for
unconformity HREE.
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Cautionary Statement
This announcement and information, opinions or conclusions expressed in the course of this announcement contains forecasts and forward-looking
information. Such forecasts, projections and information are not a guarantee of future performance, involve unknown risks and uncertainties. Actual
results and developments will almost certainly differ materially from those expressed or implied. There are a number of risks, both specific to
Dreadnought, and of a general nature which may affect the future operating and financial performance of Dreadnought, and the value of an
investment in Dreadnought including and not limited to title risk, renewal risk, economic conditions, stock market fluctuations, commodity demand
and price movements, timing of access to infrastructure, timing of environmental approvals, regulatory risks, operational risks, reliance on key
personnel, reserve estimations, native title risks, cultural heritage risks, foreign currency fluctuations, and mining development, construction and
commissioning risk.
Competent Person’s Statement – Mineral Resources
The information in this announcement that relates to Mineral Resources is based on information compiled by Mr. Lynn Widenbar, a Competent
Person who is a Member of the Australasian Institute of Mining and Metallurgy. Mr. Widenbar is a full-time employee of Widenbar and Associates
Pty Ltd. Mr. Widenbar has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the
activity that is being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration
Results, Minerals Resources and Ore Reserves’. Mr. Widenbar consents to the inclusion in the announcement of the matters based on his information
in the form and context that the information appears.
Competent Person’s Statement – Exploration Results and Exploration Targets
The information in this announcement that relates to geology, exploration results and planning, and exploration targets was compiled by Mr. Dean
Tuck, who is a Member of the AIG, Managing Director, and shareholder of the Company. Mr. Tuck has sufficient experience which 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 Exploration Results, Mineral Resources and Ore Reserves'. Mr. Tuck consents to the
inclusion in the announcement of the matters based on the information in the form and context in which it appears.
The Company confirms that it is not aware of any further new information or data that materially affects the information included in the original
market announcements by Dreadnought Resources Limited referenced in this report and in the case of Mineral Resources, that all material
assumptions and technical parameters underpinning the estimates in the relevant market announcements continue to apply and have not materially
changed. To the extent disclosed above, the Company confirms that the form and context in which the Competent Person’s findings are presented
have not been materially modified from the original market announcements.
RESOURCES SUMMARY
Yin Ironstone Complex – Yin, Yin South, Y2, Sabre Measured, Indicated and Inferred Resources
Table 1: Summary of Yin Resources at 0.20% TREO Cut-off.
Resource
Classification
Geology
Measured
Measured
Measured
Indicated
Indicated
Indicated
Inferred
Inferred
Inferred
Total
Total
Oxide
Fresh
Subtotal
Oxide
Fresh
Subtotal
Oxide
Fresh
Subtotal
Oxide
Fresh
Resource
(Mt)
TREO
(%)
Nd2O3+Pr6O11
(kg/t)
NdPr:TREO
Ratio (%)
Contained
TREO (t)
Contained
Nd2O3+Pr6O11 (t)
2.47
2.70
5.17
13.46
7.67
21.13
1.51
2.17
3.68
17.44
12.54
29.98
1.61
1.09
1.34
1.06
0.95
1.02
0.75
0.75
0.75
1.11
0.95
1.04
4.6
3.0
3.8
3.1
2.8
3.0
1.9
2.1
2.0
3.2
2.7
2.9
29
27
28
29
29
29
25
28
27
29
29
29
39,700
29,500
69,300
142,600
72,800
215,400
11,200
16,300
27,600
193,600
118,700
312,300
11,400
8,100
19,500
41,000
21,300
62,300
2,800
4,500
7,300
55,300
33,900
89,300
TOTAL
Gifford Creek Carbonatite – Inferred Resource
Table 2: Summary of the Gifford Creek Carbonatite Inferred Resource at various % TREO Cut-offs.
Cut-Off
(%TREO)
Resource
(Mt)
TREO
(%)
NdPr:TREO
(%)
Nb2O5
(%)
P2O5
(%)
TiO2
(%)
Sc
(ppm)
Contained
TREO (t)
Contained Nb2O5
(t)
0.90
0.70
0.50
0.30
5.73
10.84
20.55
45.87
1.18
1.00
0.80
0.58
21
21
21
21
0.25
0.22
0.15
0.10
3.8
3.5
3.0
2.7
5.4
4.9
3.9
3.0
92
85
68
52
67,500
108,000
164,600
265,300
14,500
23,700
31,100
44,800
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Hole ID
TIGERC001
and
TIGERC002
incl
and
and
and
and
and
TIGERC003
and
and
incl
incl
TIGERC004
and
and
TIGERC005
and
TIGERC007
and
TIGERC010
TIGERC011
incl
TIGERC012
and
TIGERC013
incl
and
and
and
Hole ID
TIGERC001
TIGERC002
TIGERC003
TIGERC004
TIGERC005
TIGERC006
TIGERC007
TIGERC008
TIGERC009
TIGERC010
TIGERC011
TIGERC012
TIGERC013
TIGERC014
TIGERC015
Table 3: Significant Results (>0.2% Zn, Cu, Pb, WO3 >0.2g/t Au)
From
To
Interval Zn Cu Pb
Ag
Au
WO3
(m)
(m)
(m)
(%) (%) (%) (g/t) (g/t)
(%)
26
27
1
0.2
0.2
0.5
31.8
0.8
0.3
56
59
3
1.0
0.1
0.3
12.0
31
40
9
1.4 0.3 0.3 11.5
0.1
32
33
1
3.3 0.8 0.9 31.0
0.3
37
39
2
3.7 0.5 0.6 23.3
0.3
82
84
2
0.2
0.3
14.5
0.1
90
91
1
0.2
0.3
18.3
93
95
2
0.2
0.2
13.2
139
141
2
0.3
0.1
7.8
0.1
13
15
2
0.3
3.2
0.2
18
24
6
1.4 0.4 0.9 11.5
0.2
31
43
12
3.6 0.5 0.4 13.4
0.1
32
38
6
5.4 0.6 0.3 16.6
35
37
2
5.6 1.1 0.3 11.7
70
71
1
0.8
0.1
2.7
86
87
1
0.4
0.1
0.1
5.8
46
52
6
0.2
54
56
2
2.0 0.2 0.8 32.5
0.3
61
62
1
0.8
3.3
91
93
2
0.2
0.1
0.3
9.5
98
100
2
0.2
24
25
1
0.5
0.1
9.4
0.3
1
21
20
0.4
0.1
0.2
6.8
0.1
8
10
2
1.7 0.3 1.1 39.3
0.1
110
111
1
0.9
0.2
0.1
9.2
0.2
123
124
1
0.3
0.5
0.1
28.5
0.1
30
56
26
1.5 0.3 0.5 20.2
0.2
33
40
7
3.1 0.5 0.4 15.7
0.3
48
54
6
0.7 0.5 1.0 46.7
0.3
94
96
2
1.5 0.2 0.1 13.6
0.1
121
124
3
0.5
2.5
Easting
370224
370312
370390
370493
370646
370633
370224
370393
370469
370160
370282
370309
370350
370423
370576
Table 4: Drill Collar Data (GDA94 MGAz50)
Northing
RL
Dip
Azimuth
EOH
7360081
295
-60
1
150
7360079
314
-60
0
150
7360072
299
-60
356
150
7360063
286
-61
0
150
7359992
286
-61
1
150
7359943
285
-61
0
250
7360036
285
-61
4
210
7360025
288
-61
2
246
7360201
291
-65
1
252
7360091
291
-60
22
144
7360095
297
-55
9
168
7360027
291
-61
359
228
7360070
294
-59
3
150
7359995
289
-90
0
84
7360016
286
-60
0
60
dreadnoughtresources.com.au
Prospect
Tiger
Type
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
Prospect
Tiger
8
ASX:DRE
+61 (08) 9473 8345
info@dreres.com.au
Unit 1, 4 Burgay Court
Osborne Park WA 6017
ABN 40 119 031 864
JORC Code, 2012 Edition – Table 1 Report Template
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code explanation
Commentary
Sampling techniques
•
Reverse Circulation (RC) drilling was undertaken to produce
samples for assaying.
•
•
•
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.
Laboratory Analysis
Two sampling techniques were utilised for this program, 1m
metre splits directly from the rig sampling system for each
metre and 3m composite sampling from spoil piles. Samples
submitted to the laboratory were determined by the site
geologist.
1m Splits
From every metre drilled a 2-3kg sample (split) was subsampled into a calico bag via a Metzke cone splitter from
each metre of drilling.
3m Composites
All remaining spoil from the sampling system was collected
in buckets from the sampling system and neatly deposited in
rows adjacent to the rig. An aluminium scoop was used to
then sub-sample each spoil pile to create a 2-3kg 3m
composite sample in a calico bag.
A pXRF is used on site to help determine mineralised
samples. Mineralised intervals have the 1m split collected,
while unmineralised samples have 3m composites collected.
Suspected mineralisation at Tiger is submitted for Fire Assay
from crushed sample (ALS Method Au-ICP22).
All 1m samples are also submitted for 48 multi-elements via
4 acid digestion with MS/ICP finish (ALS Code ME-MS61).
QAQC samples consisting of duplicates, blanks and CRM’s
(OREAS Standards) are inserted through the program at a
rate of ≥1:50 samples.
Drilling techniques
Drill sample recovery
•
•
•
•
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.
RC Drilling
Topdrill undertook the program utilising a truck mounted
Schramm T685WS drill rig with additional air from an
auxiliary compressor and booster. Bit size was 5 ½ ”.
RC Drilling
Drilling was undertaken using a ‘best practice’ approach to
achieve maximum sample recovery and quality through the
mineralised zones.
Best practice sampling procedure included: suitable usage of
dust suppression, suitable shroud, lifting off bottom between
each metre, cleaning of sampling equipment, ensuring a dry
sample and suitable supervision by the supervising geologist
to ensure good sample quality.
At this stage, no known bias occurs between sample recovery
and grade.
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 qualitative or quantitative in nature.
Core (or costean, channel, etc.) photography.
The total length and percentage of the relevant
intersections logged.
RC Drilling
RC chips were logged by a qualified geologist with sufficient
experience in this geological terrane and relevant styles of
mineralisation using an industry standard logging system which
could eventually be utilised within a Mineral Resource
Estimation.
Lithology, mineralisation, alteration, veining, weathering and
texture were all recorded digitally.
Chips were washed each metre and stored in chip trays for
preservation and future reference.
RC pulp material is also analysed on the rig by pXRF and
magnetic susceptibility meter to assist with logging and the
identification of mineralisation.
Logging is qualitative, quantitative or semi-quantitative in
dreadnoughtresources.com.au
9
ASX:DRE
+61 (08) 9473 8345
info@dreres.com.au
Unit 1, 4 Burgay Court
Osborne Park WA 6017
ABN 40 119 031 864
Criteria
JORC Code explanation
Sub-sampling
techniques and sample
preparation
•
Commentary
nature.
•
•
•
•
•
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.
RC Drilling
From every metre drilled, a 2-3kg sample (split) was subsampled into a calico bag via a Metzke cone splitter.
QAQC in the form of duplicates and CRM’s (OREAS
Standards) were inserted through the ore zones at a rate of
≥1:50 samples. Additionally, within mineralised zones, a
duplicate sample was taken and a blank inserted directly
after.
Tiger - 2-3kg samples are submitted to ALS laboratories
(Perth), oven dried to 105°C, crushed to >90% passing
3mm, then pulverised to >90% passing 75µ to produce a 50g
charge for determination of gold Fire Assay from crushed
sample (ALS Method Au-ICP22).
Additional material is then pulverised to 85% passing 75um
to produce a 0.25g charge for determination of 48 multielements via 4 acid digestion with MS/ICP finish (ALS Code
ME-MS61).
Standard laboratory QAQC is undertaken and monitored.
Quality of assay data
and laboratory tests
•
•
•
Verification of sampling
and assaying
•
•
•
•
Location of data points
•
•
•
Data spacing and
distribution
Orientation of data in
relation to geological
structure
•
•
•
•
•
Sample security
•
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.
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.
Laboratory Analysis
Accuracy and quality of surveys used to locate drill holes
(collar and down-hole surveys), trenches, mine workings
and other locations used in Mineral Resource estimation.
Specification of the grid system used.
Quality and adequacy of topographic control.
Collar position was recorded using a Emlid Reach RS2 RTK
GPS system (+/- 0.2m x/y, +/-0.5m z).
Data spacing for reporting of Exploration Results.
Whether the data spacing and distribution is sufficient to
establish the degree of geological and grade continuity
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