Trek commences high-impact exploration at Christmas Creek
Released
Released
Announcement PDF
15 July 2024
Trek Commences High-Impact Exploration Campaign at
Christmas Creek - 8,000m Drill Program Imminent
2024 field season begins with soil sampling program underway, drill site preparation due to
commence along with heritage surveying, ahead of a large drill program scheduled next month
Highlights
Field work underway at flagship Christmas Creek Gold & REE Project:
• Soil sampling commenced, targeting both gold & REE.
• Heritage survey for untested high-priority gold drill target due to commence this week.
• 8,000m RC drill program scheduled to commence in the coming weeks.
Multiple drill targets:
• Four high-priority gold prospects – Coogan, Martin, Zahn and Willis.
• Previous intersections at Martin include 7m @ 4.90g/t Au and 2m @ 9.65g/t Au.
• One REE/Niobium target.
Other field work planned:
• Follow-up anomalous rock chip results for REE (NdPr oxides to 900ppm).
• Sample outcropping pegmatites & base metal mineralisation.
Trek Metals Limited (ASX: TKM) (“Trek” or the “Company”) is pleased to advise that its multi-pronged
2024 exploration field season has commenced at the Christmas Creek Gold and Rare Earth Element
(REE) Project in the Kimberley region of Western Australia, with extensive field work programs now
underway ahead of a major drilling campaign scheduled to commence next month.
Trek Metals’ CEO Derek Marshall said:
“After many months of data review and desktop studies, it is pleasing have boots on the ground
at Christmas Creek. Our field camp has been established, station tracks have been graded to
facilitate easy access, and the soil sampling crew have already collected several hundred
samples. We are well underway!
“Outside of the gold potential that initially attracted Trek to this Project, the emergence of robust
REE and critical metals targets is adding some extra excitement. The in-fill soil survey has been
designed to strengthen these target areas prior to future drill testing.
“We are due to commence earthmoving this week in preparation for our upcoming drilling
program in collaboration with heritage monitors from the Yi-Martuwarra. We also have a
heritage survey scheduled to commence this week with representatives from the Jaru to assess
the proposed drilling areas at high-priority gold target Willis. I look forward to keeping investors
informed as work progresses and when results come to hand.”
Figure 1: Extensive soil sampling program commences at Christmas Creek. The OZEX Crew collecting an in-fill soil sample.
Soil sampling is being completed to strengthen existing targets and generate additional targets for
further exploration. Targets fall into two broad categories – follow-up or in-fill sampling around
previously recorded anomalous results; and areas where no previous sampling is recorded but where
there are features of interest in the geophysical data.
Figure 2: Main soil sampling areas in yellow, with existing prospects over DSG gold targeting hotspots.
2
Being located adjacent to RareX’s (ASX: REE) Cummins Range Critical Metals Project, which has a
significant REE and Phosphate Resource, the Christmas Creek Project is also highly prospective for
similar carbonatite-hosted mineralisation. In light of this, Trek has been re-evaluating historic
exploration data with a view to identifying the potential for critical minerals discoveries as well as
gold. While the previous project owners were not targeting critical metals, there are samples and
assays that are encouraging and warrant follow-up sampling and mapping.
The Cummins Range REE deposit was discovered by CRA Exploration (CRAE) in 1980 by following up
prospective magnetic features in a regional survey. CRAE identified several additional targets
surrounding the Cummins Range Deposit, with limited follow-up work completed.
One of the stronger magnetic anomalies sits wholly within Trek’s Christmas Creek Project, then known
as B153, is illustrated in Figure 3 below. Wide-spaced soil sampling by the previous project operator
generated a base metal anomaly co-incident with the CRAE B153 anomaly. With niobium-enriched
carbonatites identified in adjacent anomalies and no drilling at the Price/B153 anomaly, this is a high
priority for targeted exploration, where an initial in-fill soil sampling program is to commence shortly.
The results of the soil sampling will determine the next steps for this encouraging target.
Figure 3: CRA Exploration magnetic contour map of the Cummins Range Project from its 1980 annual exploration report,
WAMEX a10497. Note the overlapping Price base metal and B153 REE anomalies and the magnetic trend towards the highly
magnetic Cummins Range REE deposit.
Turner North – Rare Earth Elements
The Turner North Prospect (Figure 2) comprises three field samples that returned highly elevated REE
results, such as 3,069ppm TREO including 900ppm NdPr oxides and 1,121ppm TREO including 247ppm
NdPr. Geologic descriptions of the Turner North samples indicate an iron-rich lithology that appears
similar to recorded surface samples associated with the Cummins Range deposit. Covering a strike
3
length of 150m, the samples provide a target for additional field mapping and sampling, and
potentially drilling, pending a thorough assessment of the scale and mineralisation potential.
Table 1: Rare earth element rich rock samples from the Turner North Prospect at the Christmas Creek Project with NdPr results
above 100ppm. Note that elements with abundances below 10ppm are not displayed but are included in the TREO number.
SAMPLE MGA_East MGA_North Ce2O3 Dy2O3 Er2O3 Gd2O3 La2O3 Nd2O3 Pr2O3 Sm2O3 Y2O3 Yb2O3 TREO NdPr
GDA2020 GDA2020 ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm
1146481 295905
7888054
161.6 18.9
8.4
22.4 127.8 112.9 26.7
22.3 93.7
6.0 613.2 139.6
1798475 268062
7880989
350.2
5.0
3.3
5.0 174.7
92.1 30.2
10.6 34.5
3.2 713.3 122.3
1798489 299634
7892608 1311.9 39.0 24.4
32.7 121.4 107.9 28.0
25.9 303.5 20.7 2041.5 135.9
1798490 295065
7890918
542.3 10.9
3.5
17.6 223.4 191.3 56.2
34.4 29.5
2.8 1120.8 247.5
1798491 295101
7890928 1335.3 44.3 16.0
68.2 369.4 713.8 186.7 129.9 157.5 12.0 3068.9 900.5
1798493 295212
7890919
413.5
7.2
3.2
11.1 179.4 128.3 36.9
18.2 34.0
2.5 840.2 165.2
About the Christmas Creek Project (Kimberley, Western Australia)
The Christmas Creek Project, located south-west of Halls Creek, represents a largely concealed districtscale gold and rare earths exploration opportunity, associated with a major continental-scale tectonic
lineament intersection. The Project covers a total area of 1,183km2, all of which is covered by Heritage
Access Agreements, with total exploration expenditure to date of ~$5.7 million.
The Project previously sat within Newmont’s suite of exploration projects, held under a joint venture
with Archer X Pty Ltd (Archer X). Under the previous joint venture and earn-in agreement, Newmont
successfully earned a 75% interest in the Project. Newmont subsequently relinquished that interest
following a rebalancing of its global exploration portfolio, returning the Project to 100% Archer X
ownership.
Archer X targeted the area as it believed it may be an extension of the prolific Granites-Tanami Orogen
(Figure 4), exposed as a basement high, with metasediments in the area showing a correlation to the
Tanami host sequences.
Figure 4: Continental scale context and location map for the Christmas Creek Project, located at the intersection of G3 and
G5 metallogenic lineament corridors, potentially representing the intersection of the Granites-Tanami Orogen & the Halls
Creek Orogen.
4
Four major prospects have been identified within the Christmas Creek Project area – Martin, Coogan,
Zahn and Willis (Figure 2) utilising Newmont’s proprietary Deep Sensing Geochemistry (DSG) which
has been developed to explore for mineralisation concealed under cover.
The presence of bedrock gold mineralization has been confirmed by drilling at Martin and Coogan,
although both these prospects remain sparsely drill tested, in particular Coogan with drill lines
approximately 1km apart. The strong gold surface anomalism at Zahn remains unexplained in drilling
and there has been no drilling to date at the Willis Prospect.
Drill intersections at Martin include 7m @ 4.9g/t Au and 2m @ 9.65g/t Au, with the mineralisation
remaining open (refer ASX:TKM 11 October 2023). A broad gold-mineralised structure with
intersections such as 34m @ 0.18g/t Au and 38m @ 0.16g/t Au has been defined at Coogan by drilling
on two sections about 1km apart, with the central core of the anomaly (between these sections)
remaining untested (refer ASX:TKM 11 October 2023).
Trek completed the acquisition of the Christmas Creek Project in October 2023 (refer ASX:TKM 11
October 2023). Having acquired a considerable data package with the Project, the Trek team has been
systematically working through this data and building a pipeline of targeted work programs. Standout
drill targets are interpreted at the Zahn, Coogan, Martin and Willis Prospects (Figure 5).
Figure 5: Gold heatmap as defined by Deep Sensing Geochemistry (DSG) surface geochemistry across the project area,
highlighting the four main prospect areas; Coogan, Martin, Zahn & Willis – all with planned drilling this year.
5
Authorised by the Board of Directors
ENDS
For further information contact:
INVESTORS:
MEDIA:
Derek Marshall
Nicholas Read
dmarshall@trekmetals.com.au
info@trekmetals.com.au
0419 929 046
Competent Persons Statement
The information in this report relating to Exploration Results is based on information compiled by the
Company’s Exploration Manager, Mr Chris Shaw, a Competent Person, and Member of the Australian
Institute of Geoscientists (AIG). Mr Shaw has sufficient experience relevant to the style of
mineralisation and to the type of activity described 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 Shaw has disclosed that he holds Performance Rights in the Company. Mr Shaw
consents to the inclusion in this announcement of the matters based on his information in the form
and content in which it appears.
DISCLAIMERS AND FORWARD-LOOKING STATEMENTS
This announcement contains forward looking statements. Forward looking statements are often, but
not always, identified A words such as "seek", “target”, "anticipate", “forecast”, "believe", "plan",
"estimate", "expect" and "intend" and statements that an event or result "may", "will", "should",
"could" or "might" occur or be achieved and other similar expressions.
The forward-looking statements in this announcement are based on current expectations, estimates,
forecasts and projections about Trek and the industry in which it operates. They do, however, relate
to future matters and are subject to various inherent risks and uncertainties. Actual events or results
may differ materially from the events or results expressed or implied by any forward-looking
statements. The past performance of Trek is no guarantee of future performance.
None of Trek’s directors, officers, employees, agents or contractors makes any representation or
warranty (either express or implied) as to the accuracy or likelihood of fulfilment of any forwardlooking statement, or any events or results expressed or implied in any forward-looking statement,
except to the extent required by law. You are cautioned not to place undue reliance on any forwardlooking statement. The forward-looking statements in this announcement reflect views held only as
at the date of this announcement.
6
JORC Table Section 1: Sampling Techniques and Data:
Criteria
Sampling
techniques
JORC Code explanation
• 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
•
Soil sampling was the primary method for generating drill targets at the
Project, with sampling and analysis being undertaken by two main
methods:
o Deep Sensing Geochemistry (DSG):
Drilling
techniques
•
•
NA
Drill sample
recovery
•
•
NA
•
NA
•
Soil sampling by Newmont’ proprietary DSG technology is described above
and includes the subsampling of the ultrafine fraction of the collected soil
sample.
Quality control included field and laboratory duplicates
•
•
Logging
•
•
•
Sub-sampling
techniques
and sample
preparation
•
•
Drill type (eg core, reverse circulation, openhole 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).
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
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.
DSG is a proprietary geochemical method developed at Newmont and is
applied in areas with covered terrain. The method is used to map
lithologies, regolith variations, alteration, and mineralisation at depth
based on the analysis of materials obtained in the area of interest.
Details about the method are proprietary to Newmont and involve
nonconventional aspects of field collection, analytical methods, and data
analysis. The samples were shipped to Newmont’s proprietary facility in
Denver, USA for processing. Results from the survey require
geochemical interpretation to produce products typically quantified by a
“score” that reflects geological information of interest such as lithology,
alteration, mineralisation etc. Newmont’s DSG technique is proprietary,
and the data and methodology are commercial in confidence.
All figures within the main body of the announcement relating to surface
geochemistry are utilising the DSG dataset.
o
Conventional:
A conventional soil sampling program was also undertaken at Martin to
confirm the replication of the DSG sampling results. A soil sample was
collected from each sample site using a hand shovel, and the soil passed
through a sieve. Each soil sample was generally collected over a 30cm x
30cm area, from an average depth of 30cm. Soil samples were
submitted to Australian Laboratory Services Pty Ltd (ALS) in Malaga,
Western Australia for gold and multi‐element analysis (ME-MS41L, Aqua
Regia & LA-ICP-MS).
•
7
Criteria
Quality of
assay data
and
laboratory
tests
Verification of
sampling and
assaying
JORC Code explanation
• For all sample types, the nature, quality and
appropriateness of the sample preparation
technique.
• Quality control procedures adopted for all subsampling 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 (eg standards, blanks, duplicates,
external laboratory checks) and whether
acceptable levels of accuracy (ie lack of bias)
and precision have been established.
•
•
•
•
Location of
data points
•
•
•
Data spacing
and
distribution
•
•
•
Orientation of
data in
relation to
•
Commentary
•
Using an ultrafine sediment subsample has been statistically demonstrated
to be highly representative subsample technique.
•
Soil and rock chip sampling is appropriate for the stage of exploration being
conducted.
•
Publicly available information on Deep Sensing Geochemistry (DSG) is
provided under Sampling techniques of this table. It is considered an
appropriate method to analyse transported cover sequences in the search
of concealed bedrock mineralisation.
•
Conventional soils were analysed by Australian Laboratory Services Pty Ltd
(ALS) in Malaga, Western Australia for gold and multi‐element analysis
(ME-MS41L, Aqua Regia & LA-ICP-MS).
•
Surface rock samples were analysed by screen fire assay for Au, fusion
with ICP finish and 4Acid digest for multi-element analysis (ME-MS61L, AuICP22) at ALS in Malaga. These techniques are considered full digest for
most elements and appropriate for the elements of interest.
•
Gold standards were inserted at a frequency of one per 50 samples and
blanks inserted every 50 samples. Duplicate samples were requested every
50 samples.
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.
•
Any significant results reported are from surface rock chip samples and may
require further field work, including additional rock chip samples to verify the
mineralisation, and potentially drilling.
•
All company data has been verified and included in the company database.
•
Reporting to rare earth elements as oxides requires the conversion of the
elemental REE into REO, the ratios employed for this are standard
stoichiometric conversions, in this case sourced from
https://www.jcu.edu.au/advanced-analytical-centre/resources/element-tostoichiometric-oxide-conversion-factors
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.
•
Location of samples were recorded using a handheld GPS which is
considered appropriate at this stage of exploration.
•
Grid projection system is GDA2020 / MGA zone 52
•
Surface RL data is collected using GPS.
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.
•
Wide spaced (2 x 1km) DSG surface geochemistry was initially used as first
pass. Anomalies defined were selectively infilled by DSG carried out at a
nominal offset grid spacing ranging from 250 m x 250 m to 500 m x 500 m.
Some tight spaced infill was done at 25m x 100m to refine drill targets.
•
At this early stage of exploration, the exact influence of geological structure
is unknown.
8
Criteria
geological
structure
Sample
security
Audits or
reviews
JORC Code explanation
• 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.
Commentary
•
Chain of custody is managed by the Company. Samples are freighted
directly to the laboratory with the appropriate documentation.
•
•
A review of all available information regarding the sampling techniques, data
and analytical methods has been undertaken by Trek and an external
consultant where it is considered that industry best practice methods have
been employed at all stages of exploration to date.
The results of any audits or reviews of
sampling techniques and data.
JORC Table Section 2: Reporting of Exploration Results:
(Criteria listed in the preceding section also apply to this section.)
Criteria
Mineral
tenement and
land tenure
status
Exploration
done by other
parties
JORC Code explanation
• 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 license to operate in the area.
•
Acknowledgment and appraisal of exploration
by other parties.
Commentary
• The Project is located ~140 km south-west of Halls Creek in northern Western
Australia and comprises granted licences E80/4975, E80/5082, E80/5083,
E80/5427, & E80/5914 and four applications, E80/6007, E80/6010, E80/6011,
& E80/6012. All tenements are held by Archer X Pty Ltd
•
Key terms for the 100% acquisition of Archer X Pty Ltd by Trek are outlined in
the ASX release dated 11/10/2023.
•
The Licences are located on Native Title determined land belonging to the YiMartuwarra Ngurrara in the west, and the Jaru people in the east. There is no
Native Title claim over the Zahn prospect in the southeast of the Project.
•
For the granted tenements, Native title, heritage protection and mineral
exploration agreements have been entered into with the Jaru and YiMartuwarra Ngurrara Native Title Holders and Newmont Exploration Pty Ltd
and/or Archer X Pty Ltd. Where relevant agreements have been assigned to
Archer X Pty Ltd. All fieldwork activities have been undertaken in conjunction
with approval from Native Title representatives of the Yi-Martuwarra Ngurrara
and Jaru people with heritage surveys completed at Martin and Coogan and
the cultural monitors present when requested. An archaeological survey was
completed prior to drilling activities at Zahn.
•
The Project area lies within five cattle stations; Larrawa, Lamboo, Carranya,
Yougawalla and Bulka.
•
The Project area is relatively under explored with historical activity centred
on the Christmas Creek and Burrtina Pool prospects. A rare earth oxide
Resource within a carbonatite plug (Cummins Range Project, RareX Limited,
ASX:REE) exists just outside to the southeast of the Project area.
•
Gold nuggets were first discovered in proximity to the Christmas Creek in the
1890’s. Barnes (1985) suggests several thousand ounces were produced
from the area, mostly in the 1930s and 1950s. No official production records
exist. Further prospecting and illegal dozing of the site has occurred.
•
CRA Exploration Pty Ltd (CRAE) undertook exploration in the area during the
late-1970s and early 1980’s, undertaking an airborne magnetic and
radiometric survey, followed with field mapping and limited drilling. CRAEs
exploration lead to the discovery of the Cummins Range REE deposit, along
with the generation of several targets away from the main deposit, cfx
WAMEX A10497
•
G.B. Barnes and Associates for M.H. Ynema in the mid-1980s to early 1990s
undertook sampling across stockwork veining produced a peak gold value of
21g/t Au. A 20g/t Au result was returned in 1992 after further sampling.
9
Criteria
Geology
Drill hole
Information
JORC Code explanation
•
•
Deposit type, geological setting and style of
mineralisation.
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 –
Commentary
•
Billiton Australia explored the southwestern portion of the Project between
1991 and 1994 for Pb-Zn mineralisation. Utilising 2D seismic data collected
in 1985 for oil exploration, gravity, and magnetic data Billiton targeted an oiltrap style limestone dome with a single 565m deep diamond core hole. No
significant assay results were returned however the model they were
targeting has been superseded.
•
Northern Star Resource Ltd completed Air Core (AC) drilling targeting the
CRAE gold‐bismuth anomaly and geophysical aeromagnetic and radiometric
highs undercover. Forty‐six AC holes were drilled for 1,636m over three
years. No significant assays were returned.
•
Newmont entered into a Joint Venture agreement with Archer X Pty Ltd in
2017 and explored the Project until withdrawal in September 2023, with most
of the on groundwork undertaken in the period 2018 – 2022. Exploration
included significant surface geochemistry followed up by limited Air Core and
Reverse Circulation drilling. Three prospects (Coogan, Martin and Zahn)
have been drill tested and have all returned positive results. Highlights from
Martin include 7m at 4.9g/t Au (including 1m at 29.6g/t Au) from 24m in hole
NEWXCAC196, 2m @ 9.65g/t Au from 72m in NEWXCRC012 and 3m @
2.03g/t Au from 137m in NEWXCRC015. At Zahn, weak polymetallic
mineralisation with a maximum intercept of 1m at 1% zinc was seen in
association with sulphides along the contact between granodiorite and
metasedimentary rocks. Drilling at Coogan returned 34m @ 0.18g/t Au from
58m in hole NEWXCRC021, 38m @ 0.16g/t Au from 14m and 30m @ 0.15g/t
Au from 144m in hole NEWXCRC029 (refer announcement 11/10/2023).
Newmont also undertook numerous geophysical surveys, including passive
seismic, ground magnetics, wireline televiewer & airborne EM.
•
The Project is centred on the southernmost extension of the Halls Creek
Orogen, located within the Kimberley region of Western Australia.
Proterozoic sediments of the Project area are broadly correlative with
Proterozoic sediments of northwestern Australia, host to the world class
Callie‐Auron deposit in the Tanami Orogen.
•
It is hypothesised that this area may represent a triple junction with the
Granites‐Tanami Orogen, Wunaamin Miliwundi Orogen and the Halls Creek
Orogen. Paleoproterozoic rocks of the eastern zone of the Lamboo Province
are the oldest rocks mapped. Neoproterozoic rocks of the Wolfe and Louisa
Basins are also present. In the Project area, these Palaeo‐ to Neoproterozoic
rocks are largely covered by Phanerozoic sedimentary rocks of the Canning
Basin.
•
The exploration undertaken by Newmont has identified gold mineralisation at
Coogan and Martin associated with minor sulphides (pyrite, chalcopyrite) in
quartz veins. Mineralisation at Martin has an association with bismuth,
tellurium, tungsten and selenium. Mineralisation at Coogan has a strong
correlation with bismuth and also an association with tellurium, copper and
molybdenum, potentially pointing towards an intrusion-related mineral
system. In both cases, the psammitic to pelitic host rocks are interpreted to
be part of the Olympio Formation, a correlative of the Killi Killi Formation in
the Tanami Region.
•
NA
10
Criteria
Data
aggregation
methods
Relationship
between
mineralisation
widths and
intercept
lengths
Diagrams
Balanced
reporting
Other
substantive
exploration
data
Further work
JORC Code explanation
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 (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 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 (eg ‘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 a
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