Skip to main content

AI assistant

Sign in to chat with this filing

The assistant answers questions, extracts KPIs, and summarises risk factors directly from the filing text.

RESOLUTION MINERALS LTD Audit Report / Information 2018

Jul 24, 2018

65717_rns_2018-07-24_5dcc6851-577c-4115-8801-113565cedafb.pdf

Audit Report / Information

Open in viewer

Opens in your device viewer

DRILLING RESULTS - WOLLOGORANG COBALT PROJECT, NT

  • Assays received for 320 of 805 reconnaissance shallow air core drill holes completed this season.

  • Positively 53 of 320 (~17%) of the holes have anomalous cobalt in excess of 100 ppm Co. This compares favourably with the signature of 147ppm Co over the existing Stanton Cobalt Deposit. Deeper drilling on the most prospective targets will commence in two weeks.

  • Shallow drill testing of drill targets to continue for another 2 weeks. Drilling is expected to continue till the commencement of the wet season in November.

  • Measures to overcome recent technical issues with field equipment have been implemented. Over the coming weeks, laboratory assay results from the additional ~500 holes are expected to be released.

Wollogorang Cobalt Drilling Program

Northern Cobalt Limited ( ASX: N27 ) is pleased to announce that ongoing drilling has confirmed significant new cobalt mineralised targets in the results from the first pass drilling campaign. The company has been testing drill targets consisting of magnetic lows similar to that underlying the Stanton Cobalt Deposit. This exploration method has been encouraging, with approximately 17%, or 53 of the 320 drill holes analysed so far intersecting cobalt mineralisation in excess of 100ppm which is comparable to similar samples taken over the Stanton Cobalt Deposit. Deeper follow up drilling to test these targets will commence in two weeks.

“These new drill results are a strong step towards our strategy of adding additional resource tonnes near our existing Stanton Cobalt Deposit ”, Managing Director, Michael Schwarz.

==> picture [525 x 156] intentionally omitted <==

CAPITAL STRUCTURE

BOARD

Listed 6.3 M @ 20c Unlisted 12.3 M @ 25c

==> picture [419 x 562] intentionally omitted <==

Figure 1. High priority drill targets on RTP magnetic image

Page | 2

Shallow Drilling Results Defining Deeper Drilling Targets

The highly mobile, 6-wheel drive mounted drill rig is proving very effective at rapidly testing the cobalt potential of our multiple drill targets. The rig is, on average, drilling to a depth of 5 m, allowing us to see beneath the overlying sands and clays which have masked the underlying mineralisation.

To give context to the results we have compared the surface sampling undertaken over the Stanton Cobalt Deposit to get an idea of anomalous values expected in the material over the top of the cobalt mineralisation at depth. The average cobalt of all lag samples taken within the resource boundary is 147 ppm Co with a peak value of 358 ppm Co. Given the shallow nature of drilling on our regional targets we would expect that assay results of 100 ppm and above are anomalous are a good indicator of cobalt mineralisation at depth.

==> picture [309 x 428] intentionally omitted <==

Figure 2. Detailed diagram of Area 1

Page | 3

==> picture [422 x 473] intentionally omitted <==

Figure 3. Detailed diagram of Area 2

It will take about another 2 weeks to complete the first pass drilling of targets within the immediate vicinity of the Stanton Deposit.

Page | 4

Follow-up Drilling

Northern Cobalt is now refining drill targets that indicate good potential for hosting mineralisation similar to that at the Stanton Cobalt Deposit.

Once the first-pass drilling is complete the drill rig will return to prospects that have demonstrated good cobalt mineralisation. These prospects will be drilled out on a 25m grid, to depths of 30m-40m, to map the dimensions of the mineralised body.

Those prospects that demonstrate the potential to host an economic resource will be drilled out with a large percussion reverse-circulation (RC) rig on 40m centres to a depth of 80m100m.

==> picture [378 x 396] intentionally omitted <==

Figure 4. Surface lag sampling over the Stanton Cobalt Deposit

Page | 5

==> picture [309 x 272] intentionally omitted <==

Project Location

The Wollogorang Cobalt Project is located in the far north-eastern corner of the Northern Territory, a mining friendly authority. The Project area is 180 km to the south-east of the population centre of Borroloola. The capital city of Darwin is 870 km to the north-west and the McArthur River Mine is approximately 150 km to the west-northwest.

Competent Persons Statement

The information in this report that relates to exploration results is based on, and fairly represents, information and supporting documentation compiled by Mr Michael Schwarz who is a member of the Australian Institute of Geoscientists. Mr Michael Schwarz is a full-time employee of the company and 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 ‘Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Michael Schwarz consents to the inclusion in the report of the matters based on his information in the form in which it is appears. The information in this announcement is an accurate representation of the available data and studies of the material mining project. This report includes results that have previously recently been released under JORC 2012 by the Company as “Stanton Resource Upgrade Increases Contained Cobalt” on 9 April 2018.The Company is not aware of any new information or data that materially affects the information included in this announcement and all material assumptions and technical parameters underpinning the Mineral Resource continue to apply and have not materially changed.

For further information please contact: Michael Schwarz Managing Director, Northern Cobalt Ltd M: +61 402 101 790 E: [email protected]

Page | 6

Appendix 1. Summary table of drill hole details

Note: All analyses in this table have been determined by X-Ray Fluorescence Spectrometry– undertaken by the Bureau Veritas laboratory in Perth. All drill holes not shown in this table have reported cobalt analyses of less than 100 ppm and were not considered significant for exploration purposes. In the interests of readability these have not been reported in this table.

Sample Depth Depth Depth As Bi Co Cu NiO Mo XRF1
No DH NAME
Easting

Northing

RL
From To (ppm) (ppm)
(ppm)
(ppm) (ppm) (ppm)
30037
18AC0009
794099
8150254

67

2
3
10

0.9

101

128

40

1
30038 18AC0009 794099 8150254 67
3
4
-1

0.4

166

88

26

-0.5
30039
18AC0009
794099
8150254

67

4
5
3

1

216

116

40

1
30145 18AC0047 793994 8150274 74
8
9
30

-10

110

160

40

-10
30146
18AC0047
793994
8150274

74

9
10
60

-10

120

230

50

-10
30165 18AC0050 793850 8150291 76
8

8.5

10

-10

270

220

70

-10
30169
18AC0052
793775
8150249

76

0
1
-10

-10

100

60

40

-10
30170 18AC0052 793775 8150249 76
1
2
20

-10

120

40

40

-10
30172
18AC0052
793775
8150249

76

3
4
10

-10

100

80

40

-10
30200 18AC0060 793715 8150509 86
0
1
50

-10

100

30

50

-10
30205
18AC0062
793716
8150405

85

0
1
40

-10

140

60

10

-10
30209 18AC0063 793721 8150352 87
1
2
60

-10

160

60

50

-10
30228
18AC0066
793722
8150200

92

2
3
30

-10

120

30

20

-10
30229 18AC0066 793722 8150200 92
3
4
70

-10

110

30

-10

-10
30244
18AC0069
793658
8150296

95

1
2
10

-10

200

60

30

10
30249 18AC0070 793657 8150348 95
1
2
20

-10

150

60

60

10
30280
18AC0076
793598
8150503

100

1
2
50

-10

150

50

70

-10
30286 18AC0077 793602 8150449 99
1
2
20

-10

100

40

30

-10
30289
18AC0078
793603
8150403

99

1
2
30

-10

140

50

30

-10
30306 18AC0081 793604 8150300 92
1
2
40

-10

150

60

-10

-10
30333
18AC0087
793486
8149952

75

1
2
60

-10

150

70

10

-10
30352 18AC0089 793477 8149853 78
7
8
50

-10

120

90

50

-10
30353
18AC0089
793477
8149853

78

8
9
50

-10

120

100

50

-10
30354 18AC0089 793477 8149853 78
9
10
60

-10

110

70

40

-10
30357
18AC0089
793477
8149853

78

12
13
30

-10

140

90

40

-10
30374 18AC0092 793845 8149904 86
1
2
60

-10

180

50

10

-10
30381
18AC0093
793833
8149854

89

1
2
50

-10

100

60

30

-10
30390 18AC0094 793830 8149804 91
1
2
40

-10

130

50

10

-10
30411
18AC0097
793583
8149300

99

1
2
50

-10

170

40

30

-10
30423 18AC0098 793575 8149248 101
1
2
50

-10

170

50

10

-10
30424
18AC0098
793575
8149248

101

2
3
30

-10

100

60

-10

-10
30465 18AC0106 794342 8148503 102
1
2
60

-10

110

110

10

10
30498
18AC0115
791601
8149648

75

1
2
30

-10

100

40

40

-10
30524 18AC0121 791602 8149949 72
1
2
40

-10

130

20

60

-10

Page | 7

Sample Depth Depth As Bi Co Cu NiO Mo XRF1
No DH NAME
Easting
Northing RL From To (ppm) (ppm) (ppm) (ppm) (ppm) (ppm)
30578
18AC0133
791980
8149701

80

1

2

50

-10

100

30

50

-10
30592 18AC0137 792660 8148899 92
0

1

60

-10

200

30

20

-10
30855
18AC0212
796284
8149800

48

1

2

10

-10

120

20

30

-10
30858 18AC0213 796269 8149850 48
1

2

10

-10

140

20

40

-10
30875
18AC0215
796280
8149951

48

1

2

10

-10

120

40

30

-10
30876 18AC0215 796280 8149951 48
2

3

20

-10

100

40

10

-10
30937
18AC0226
797534
8150856

38

1

2

10

-10

140

60

50

-10
30993 18AC0234 798143 8151349 42
1

2

10

-10

110

30

30

-10
31027
18AC0242
798225
8151252

45

1

2

-10

-10

100

30

40

-10
31071 18AC0250 798386 8151653 48
1

2

20

-10

280

60

80

-10
31159
18AC0261
797799
8150046

52

1

2

20

-10

120

30

60

-10
31179 18AC0263 797801 8150146 52
1

2

20

-10

100

30

60

-10
31180
18AC0263
797801
8150146

52

2

3

20

-10

100

40

110

-10
31211 18AC0268 798024 8150648 52
1

2

50

-10

100

60

50

-10
31222
18AC0269
798020
8150696

52

1

2

60

-10

100

50

80

-10
31242 18AC0272 798338 8150901 62
1

2

40

-10

100

50

50

-10
31276
18AC0275
798340
8150750

62

1

2

60

-10

120

60

30

-10
31294 18AC0277 797884 8150993 62
1

2

60

-10

100

50

50

-10
31371
18AC0287
797042
8150402

37

1

2

50

-10

100

60

90

-10
31372 18AC0287 797042 8150402 37
2

3

40

-10

100

50

40

-10
31379
18AC0288
797043
8150354

37

1

2

40

-10

110

60

70

-10
31408 18AC0290 797049 8150249 37
1

2

60

-10

150

110

90

-10
31431
18AC0294
797037
8150056

47

1

2

30

-10

130

30

50

-10
31442 18AC0296 796020 8150801 73
0

1

40

-10

130

120

30

-10
30603
18AC0140
792878
8148800

94

1

2

40

-10

100

110

50

10
30720 18AC0178 793000 8148150 94
1

2

60

-10

100

60

40

10
30798
18AC0202
795859
8149396

48

1

2

40

-10

100

60

50

10
30832 18AC0209 796276 8149647 43
1

2

40

-10

140

30

20

-10
30894
18AC0220
796082
8150052

48

1

2

40

-10

100

50

30

10
33315 18AC0611 798841 8154205 88
0

1

60

-10

100

30

50

-10
33370
18AC0621
798841
8153702

74

13

14

90

-10

160

220

30

-10
33371 18AC0621 798841 8153702 74
14

14.5

120

-10

150

140

30

-10
33383
18AC0623
798838
8153602

74

1

2

60

-10

160

50

70

-10

Page | 8

Appendix 2. The following tables are provided to ensure compliance with the JORC Code (2012) requirements for the reporting of the exploration results for the Wollogorang Cobalt Project

Section 1 Sampling Techniques and Data

(Criteria in this section apply to all succeeding sections.)

Criteria JORC Code explanation
Commentary
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.
•Air core (AC) drilling using standard
equipment.
•Sampling was undertaken at one
metre intervals.
•Samples were collected in rubber
buckets from the drill rig cyclone and
then subsampled for analyses into
plastic zip-lock bags.
•Drilling was designed to sample
relatively fresh basement beneath
surficial soil cover and wetherd and
laterised basement.
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, face-
sampling bit or other type, whether
core is oriented and if so, by what
method, etc).
•Reverse circulation air core (AC)
with a 75 mm diameter drill bit.
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
•Recovery generally good, with poor
recovery in a small number of
samples due to groundwater.

Page | 9

Criteria JORC Code explanation
Commentary
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.
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.
•Drilling logged in detail on a metre
by metre basis.
•Lithology, alteration and oxidation
logged qualitatively.
Sub-
sampling
techniques
and sample
preparation
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.
•Samples were collected in rubber
buckets from the drill rig cyclone and
then subsampled by sieving to a -80
mesh size fraction and placed into
plastic zip-lock bags.
•Representative end-of-hole samples
have been kept in plastic chip trays.
•Sample duplicates collected, and
standards used to confirm
representivity of sampling.
Quality of
assay data
and
laboratory
tests
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 (eg standards, blanks,
duplicates, external laboratory checks)
and whether acceptable levels of
Analytical Laboratory Analyses
•Sample Preparation - The samples
have been sorted & dried. The whole
sample has been pulverised in a
vibrating disc pulveriser.
•Analytical Methods - As, Bi, Co, Cu,
NiO, Mo XRF determined by X-Ray
Fluorescence Spectrometry on oven
dry (85 'C) sample unless otherwise
stated.
•The samples have been cast using a
12:22 flux to form a glass bead
which has been analysed by XRF.

Page | 10

Criteria JORC Code explanation
Commentary
accuracy (ie lack of bias) and precision
have been established.
Verification
of sampling
and
assaying
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.
•An electronic database containing
collars, geological logging and
assays is maintained by the
Company.
Location of
data points
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.
•Holes have been surveyed using
Differential GPS (DGPS).
•UTM grid MGA94 Zone 53 was used
Data
spacing and
distribution
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.
•RC drill hole spacing approximately
every 50m on a traverse across the
drill target.
•Where more than one traverse
covers a target they are spaced 50m
apart.
•Spacing and distribution is
considered to be appropriate.
Orientation
of data in
relation to
geological
structure
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.
•Sample relationship to mineralisation
and structure is unknown at this
stage.
Sample
security
The measures taken to ensure sample
security.
•Samples are bagged and sealed in
plastic tubs on site and transported
to the analytical laboratories by
commercial transport companies for
analyses
Audits or
reviews
The results of any audits or reviews of
sampling techniques and data.
•No audits undertaken at this stage
as the drilling program has only
recently commenced.

Page | 11

Section 2 Reporting of Exploration Results

(Criteria in this section apply to all succeeding sections.)

Criteria JORC Code explanation Commentary
Mineral
tenement
and land
tenure
status
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 inthe area. _
•Wollogorang Cobalt Project
exploration area occurs on EL 31272
which is 100% owned by Mangrove
Resources Pty Ltd a wholly owned
subsidiary to Northern Cobalt Ltd.
•The licence is currently in good
standing with the relevant authorities.
Exploration
done by
other
parties
Acknowledgment and appraisal of
exploration by other parties.
•The Stanton Cobalt Deposit and
surrounding prospects were
discovered by CRA Exploration Pty
Ltd in the period 1990-1996 period
under a farm in arrangement with W J
(Joe) Fisher.
Geology
Deposit type, geological setting and
style of mineralisation.
•The local geology is dominated by the
Gold Creek Volcanics of the Tawallah
Group. This formation is a series of
basaltic lavas and shallow intrusives,
interlayered with thin oxidised
sandstone, carbonate and siltstone
units. It is conformably underlain by
reduced sedimentary facies of the
Wollogorang Formation, which
includes dolostones, sandstones and
carbonaceous shales. A regional
dolerite sill, the Settlement Creek
Dolerite, was emplaced synchronous
with effusion of the Gold Creek
Volcanics. The Wollogorang
Formation and Settlement Creek
Dolerite do not outcrop on the Stanton
prospect area, but are however
intersected in a number of drill holes
on the tenement. Within the district,
the Gold Creek Volcanics are
disconformably overlain by a felsic
volcanic package that includes a
rhyolitic rheoignimbrite sheet
(Hobblechain Rhyolite), proximal
epiclastics (Pungalina Member) and
distal reworked clastics (Echo
Sandstone).

Page | 12

Criteria JORC Code explanation Commentary
•Mineralisation is interpreted to be
largely controlled by stratigraphy
within the flat lying interbedded
sediment and volcanic rock units of
the Proterozoic Gold Creek Volcanics.
Brecciation and faulting has a strong
control on the intensity and limits of
mineralisation. In fresh rock the
cobalt-nickel is located in
disseminated siegenite (cobalt-nickel
sulphide). Chalcocite and pyrite are
also noted. Weathering to a variable
depth of approximately 30m has
resulted in cobalt oxide secondary
mineralisation in a large proportion of
the deposit.
Drill hole
Information
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.
•See Appendix 1
Data
aggregation
methods
In reporting Exploration Results,
weighting averaging techniques,
maximum and/or minimum grade
truncations (eg 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
No data aggregation methods were
used

Page | 13

Criteria JORC Code explanation Commentary
reporting of metal equivalent values
_should be clearly stated. _
Relationship
between
mineralisatio
n widths and
intercept
lengths
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 (eg
‘down hole length, true width not
_known’). _
•Any observations made are down hole
length and true width is not known.
Diagrams
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. _
•See attached release.
Balanced
reporting
Where comprehensive reporting of all
Exploration Results is not practicable,
representative reporting of both low
and high grades and/or widths should
be practiced to avoid misleading
_reporting of Exploration Results. _
•All significant drill intersections have
been reported and it has been noted
when no significant intersection has
been encountered.
Other
substantive
exploration
data
Other exploration data, if meaningful
and material, should be reported
including (but not limited to): geological
observations; geophysical survey
results; geochemical survey results;
bulk samples – size and method of
treatment; metallurgical test results;
bulk density, groundwater,
geotechnical and rock characteristics;
potential deleterious or contaminating
substances.
•No other relevant data to report.
Further work
The nature and scale of planned
further work (eg tests for lateral
extensions or depth extensions or
large-scale step-out drilling).
Diagrams clearly highlighting the areas
of possible extensions, including the
main geological interpretations and
future drilling areas, provided this
information is not commercially
sensitive.
•Planned further work detailed in this,
and previous releases, and in figures.
This work includes comprises drill
testing further drill targets and follow
up drilling of mineralised prospects.

Page | 14