Nickel Sulphide Discovery Expanded At Carr Boyd
Released
Released
Announcement PDF
19 November 2020
ASX ANNOUNCEMENT
Nickel Sulphide Discovery Expanded At Carr Boyd
HIGHLIGHTS
25.7m wide zone of nickel-copper (Ni-Cu) sulphide mineralisation has been intersected in hole
CBDD033 which drilled through the Carr Boyd Layered Complex (CBLC) ~25m north of the
discovery hole CBDD030 at T5
Mineralisation is hosted within a gabbroic host unit intruded along the contact zone of the CBLC
and comprises pulses of Ni-Cu bearing massive, matrix, disseminated and breccia sulphides
Intersection is consistent with the EM conductor plate and validating the geophysical modelling
to date
Two diamond core rigs are now drilling 40m apart on the T5 discovery zone in order to expand
on the mineralisation currently being defined at the T5 zone
Figure 1. Copper rich breccia sulphides (chalcopyrite+pyrrhotite) towards the base of a 25.7m wide zone of Ni-Cu
mineralisation within drill hole CBDD033 at the T5 Prospect, Carr Boyd Rocks Project (387.2m-387.8m shown).
Estrella Resources Limited (ASX: ESR) (Estrella or the Company) is pleased to inform the market that a
further significant drill intersection of Ni-Cu (+ PGE) bearing sulphides has been intersected in diamond
core hole CBDD033 which was drilled at the T5 discovery zone at the Company’s flagship Carr Boyd
Project. The original discovery hole CBDD030 was drilled from the footwall sediment side in order to
provide a deep EM platform hole to test the basal contact position for sulphide accumulations. CB00030
intersected significant magmatic Ni-Cu mineralisation as detailed over.1
1 ASX: ESR
4/11/2020 Assays Confirm Significant High-Grade Magmatic Nickel Sulphide Discovery
_________________________________________________________________________________
Office Address London House, Level 11, 216 St Georges Terrace, PERTH WA 6000 Postal Address GPO Box 2517, PERTH WA 6831
Phone +61 8 9481 0389 Fax +61 8 9463 6103
Email info@estrellaresources.com.au
Discovery hole CBDD030 intersected the CLBC contact, was completely blind and is open in all
directions.
Results include:
o
2.5m @ 3.66% Ni, 0.46% Cu, 0.16% Co, 2.09g/t Ag & 0.78g/t Au+Pt+Pd, with 2.98%
MgO; within a zone grading
o
3.7m @ 2.85% Ni, 0.65% Cu, 0.13% Co, 2.58g/t Ag & 0.75g/t Au+Pt+Pd, with 5.65%
MgO;
o
Overall grade of sulphide zone grades 13.9m @ 1.07% Ni, 0.39% Cu, 0.05% Co,
1.56g/t Ag & 0.48g/t Au+Pt+Pd, with 10.84% MgO;
Hole CBDD033 was drilled from the opposite direction, drilling back through the CBLC mafic-ultramafic
intrusion towards the contact zone targeting above the discovery intersection. Hole CBDD033 has
intersected more Ni-Cu sulphides along the contact zone and is associated with coarse grained gabbroic
rocks intruded up the contact between the serpentinised ultramafics of the CBLC and the footwall basalts.
The sulphide mineralisation occurs over a substantial 25.7m downhole wide zone (~20m true width)
comprising of pulses of Ni-Cu bearing massive, matrix, disseminated and breccia sulphides as shown in
Figures 1 & 2 and detailed in Table 1 below.
Additional stringers and blebby sulphides occur within the footwall basalts outside of the reported zone,
supporting the intrusive remobilised nature of these sulphides being derived from a larger primary sulphide
source chamber at depth.
Figure 2. Ni-Cu bearing martix-massive sulphide zone in upper zone (left image) and breccia sulphides in lower sulphide
zone (right image) within diamond drill hole CBDD033 at the T5 Ni-Cu discovery (373.2-377.8m & 385.0-391.3m shown).
On the confirmation of more nickel sulphide being intersected at the Carr Boyd T5 Discovery Zone,
Estrella Resources MD and CEO, Mr Chris Daws, said:
“Our team has again delivered another significant drill hole confirming the extensive DHTEM plate
surrounding our initial discovery hole hosts substantial nickel sulphide mineralisation. We are moving fast
to see what further mineralisation exists at T5 with two diamond rigs drilling 24/7 into the defined DHTEM
plate, I expect from here we will continue to see more significant results. I am extremely pleased with what
has thus far been achieved and I look forward in the days, weeks ahead as the drill bits keep turning on
what has been a remarkable program to date.
“As the Company gears up for expanded drilling efforts focusing on the T5 Target area we are also rapidly
expanding our infrastructure at the project location. We have recently improved the communications at site,
with the erection of a communications tower to provide high speed internet and reliable phone service. The
old haul road is now being graded and improved to facilitate the transport of an exploration camp and office
block buildings to site,
“The core yard facility upgrades, and site office installations are in progress, with bulk water and diesel fuel
storage also being established. An old airstrip located 4km east of the Carr Boyd Mine has also been reestablished by the local station owner for RFDS and charter flight site visits of Company personnel.”
Hole ID
mFrom
mTo
Width
Texture Type
Sulphides
Visual S%
Estimation
CBDD0033
Table 1: Sulphide Intersection Summary
368.10
371.10
376.50
378.35
386.15
387.20
387.80
391.40
371.10
376.50
378.35
386.15
387.20
387.80
391.40
393.80
3.00
5.40
1.85
7.80
1.05
0.60
3.60
2.40
Disseminated
Matrix
Matrix-Massive
Dissem-Matrix
Breccia
Breccia
Disseminated
Blebby/Patchy
Po,py,cpy,pd
Po,py,cpy,pd
Po,pe,cpy
Po,py,cpy,pd
Po,py,cpy,pd
Cpy,po
Po,py,cpy,pd
Po,py,cpy
5-20%
50-70%
70-90%
20-50%
40-70%
60%
5-30%
5%
*po=pyrrhotite, py=pyrite, cpy=chalcopyrite, pe=pentlandite
In relation to the disclosure of visual mineralisation, the Company cautions that visual estimates of sulphide
and oxide material abundance should never be considered a proxy or substitute for laboratory
analysis. Laboratory assay results are required to determine the widths and grade of the visible
mineralisation reported in preliminary geological logging. The Company will update the market when
laboratory analytical results become available.
Two diamond core rigs are currently onsite drilling 40m apart at the T5 Discovery Zone (Figure 3 and Table
2) as the company’s geological team map out the extend of the sulphide zone as well as planning the next
stages of stepping out and exploring the deeper primary source of these remobilised nickel-copper sulphide
discovered to date. A DHTEM crew are currently on site surveying the completed holes and the results of
the survey will assist the geological team to modify the drill hole targeting for the next round of drill holes.
Table 2: Drill hole collar details for T5 Discovery Zone
Hole ID
CBDD0030
CBDD0033
CBDD0035
CBDD0036
Final Depth
495.7m
450m
~500m
~450m
Easting
367025
367397
367440
367420
Northing
6673640
6673660
6673660
6673620
Dip
-65
-65
-65
-65
Azimuth
090
277
270
270
Status
Completed
Completed
In Progress
In Progress
Targeted
Contact
Zone
Untested Zone
Target
Zone
Figure 3. Drone aerial photo of the T5 drill area showing the colour contrast of the targeted ultramafic contact zone between
the darker footwall zone (west) and the red iron-rich intrusion (east). The completed drill holes are on the western side of
contact and were drilled from the footwall side of the intrusion, the current drill holes are now drilling from the eastern side
through the intrusion and back towards the contact zone. Historical holes can still be seen and did not locate this blind
nickel sulphide mineralsation as they were drilled to shallow.
Competent Person Statement
The information in this announcement relating to Exploration Results, Mineral Resources or Ore Reserves is based on
information compiled by Neil Hutchison, who is the non-executive Technical Director of Estrella Resources, and a
member of The Australasian Institute of Geoscientists. Mr. Hutchison has sufficient experience relevant to the style of
mineralisation and type of deposit under consideration, and to the activity he is undertaking to qualify as a Competent
Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resource
and Ore Reserves”. Mr. Hutchison consents to the inclusion in the report of the matters based on his information in the
form and context in which it appears.
The Board has authorised for this announcement to be released to the ASX.
FURTHER INFORMATION CONTACT
Christopher J. Daws
Managing Director & Chief Executive Officer
Estrella Resources Limited
+61 8 9481 0389
info@estrellaresources.com.au
ABOUT THE PROJECT AND THE CBLC
The Carr Boyd Nickel Project (CBNP) is a magmatic
hosted sulphide system which comprises the Carr Boyd
Layered Complex (CBLC or the Complex). The CBLC is
in a Tier 1 jurisdiction approximately 80km north northeast of Kalgoorlie Western Australia. An all-weather haul
road accessible by Estrella under a granted
miscellaneous license connects the Project to the
Goldfields Highway via Scotia. Estrella holds 259km 2 of
contiguous tenure over the entire magmatic maficultramafic layered complex
The CBLC hosts the historic Carr Boyd Rocks nickel
mine which was the first magmatic hosted style of nickel
deposit discovered and mined in WA. It was discovered
an the late 1960’s and produced 202,110t of ore at an
average grade of 1.43% Ni and 0.46% Cu between
1973-1977.
Location of Carr Boyd Project
Komatiites flows have been the main source of developed nickel sulphide mines in WA and have been explored
extensively since the late 1960’s. Due to their well understood geochemistry, formation, and high-grade
sulphide enrichment process within defined channels, most of the studies and exploration programs in WA
have focused on discovering this style of mineralisation. The Kambalda-Kalgoorlie-Leinster-Laverton
Goldfields Region has been the main focus for komatiite exploration, with limited potential existing outside this
region. Greenfields discoveries of komatiite nickel have all bar dried up in the Goldfields Region and its only
deep brownfields exploration that is delivering new nickel deposits.
Elsewhere around the world, large scale magmatic nickel deposits are the norm, producing world-class
deposits with long productive mine lives. In WA, magmatic nickel deposits occur scattered throughout the
state, however, they have had a long and slow history of discovery, development and understanding. Its only
in recent years, since the discovery of the Nova-Bollinger deposit (2012) in the Fraser Range (which had been
historically explored for over 40yrs), that a string of magmatic nickel deposit have suddenly been discovered.
As komatiite sources dry up, focus and understanding around magmatic nickel deposits is starting to gain
momentum, resulting in exploration companies looking at various mafic-ultramafic bodies which have had
limited to no exploration completed over them to date. This is resulting in a new level of understanding in WA
on the formation/deposition of nickel-copper sulphides within magmatic rocks, leading to a wave of new
discoveries.
Interest in magmatic nickel-copper deposits have had a resurgence with the recent discoveries of magmatic
hosted sulphide mineralisation at Legend Mining’s (ASX:LEG) Rockford Project and Chalice Gold Mines
(ASX:CHN) Julimar Projects. A “Voisey Bay” magmatic style model has not been adequately explored within
the CBLC. This represents a compelling exploration target opportunity which the Company will continue to
aggressively pursue.
APPENDIX 1 JORC TABLE 1 - JORC CODE, 2012 EDITION – TABLE 1
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code explanation
Commentary
Sampling
Nature and quality of sampling (e.g. cut DD core samples have been half cut with automatic core
techniques
channels, random chips, or specific
saw
specialised
industry
standard 0.3m-1.1m samples are collected from the core trays as
measurement tools appropriate to the
marked out by the supervising geologist
minerals under investigation, such as A handheld XRF tool was used to verify the mineralisation
down hole gamma sondes or handheld
with samples reporting >0.3% Ni in disseminated zones
XRF
instruments,
etc.).
These
and >1% Ni in the matrix sulphide zones.
examples should not be taken as XRF results have not been reported and are used as a
limiting the broad meaning of sampling.
logging/sampling verification tool only.
No other measurement tools other than directional survey
tools have been used in the holes.
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
30g 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
Drilling
techniques
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, facesampling bit or other type, whether core
is oriented and if so, by what method,
etc).
Core is continuously cut on the same side of the
orientation line and the same side is sampled to ensure
the sample is representative and no bias is introduced.
Determination of mineralisation has been based on
geological logging and confirmation using a pXRF
machine. Samples were dispatched for laboratory ultielement analysis.
.
Diamond Core drilling was used to obtain 3-6m length
samples from the barrel which are then marked in one
meter intervals based on the drillers core block
measurement.
Assay samples are selected based on geological logging
boundaries or on the nominal meter marks.
Collect samples weigh a nominal 2-3 kg (depending on
sample recovery) was sent to lab and pulverised.
Samples have been dispatched to a commercial
laboratory in Perth for analysis
Samples are being analysed using a 4 acid digest for MEICP for 33 elements and ore zone samples are also being
tested for PGM-ICP testing for Au & PGE elements
Drilling was undertaken using NQ2 sized drill core.
Hole was collar with mud rotary from surface, HQ rough
cored to top of fresh rock then NQ2 cored to EOH.
_________________________________________________________________________________
Office Address London House, Level 11, 216 St Georges Terrace, PERTH WA 6000 Postal Address GPO Box 2517, PERTH WA 6831
Phone +61 8 9481 0389 Fax +61 8 9463 6103
Email info@estrellaresources.com.au
Criteria
Drill sample
recovery
Logging
Subsampling
techniques
and sample
preparation
Quality of
assay data
and
laboratory
tests
Verification
of sampling
JORC Code explanation
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.
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.
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.
Commentary
Core recovery was recorded by the drill crew and verified
by the geologist.
RQD measurements were digitally recorded to ensure
recovery details were captured.
Sample recovery in both holes was high with negligible
loss of recovery observed.
Diamond core drilling is the highest standard and no
relationship has been established between sample
recovery and reported grade as the core is in very good
condition.
The
verification
of
significant
intersections by either independent or
alternative company personnel.
Results verified by Company CEO
Detailed industry standard of collecting core in core trays,
marking meter intervals & drawing core orientation lines
was undertaken
Core trays were photographed wet and dry prior to
sampling.
Drill hole logs are recorded in Excel spread sheets and
validated in Micromine Software as the drilling
progressed.
The entire length of both holes was logged.
Core is half cut using an automatic core saw to achieve a
nominal 2-3kg split sample for laboratory submission
The sample preparation technique is considered industry
best standard practice
No field duplicates have been collected in this program.
Field duplicates will be collected once initial results are
return and resampling of the mineralised zones is
warranted.
Sample sizes are appropriate to the grain size of the
mineralisation.
No handheld XRF results are reported however the tool
was used to verify the mineralisation with reporting >0.3%
Ni in disseminated zones and >1% Ni in the matrix
sulphide zones.
Criteria
and
assaying
JORC Code explanation
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.
Location of
data points
Data
spacing
and
distribution
Orientation
of data in
relation to
geological
structure
Sample
security
Audits or
reviews
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.
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.
The results of any audits or reviews of
sampling techniques and data.
Commentary
Hole CBDD0028 is twinning hole CBP042
The data was collected and logged using Excel
spreadsheets and validated using Micromine Software.
The data will be loaded into an externally hosted and
managed database and loaded by an independent
consultant, before being validated and checked, then
exported and send back to ESR for analysis.
No adjustments have been made to the assay data other
than length weighted averaging.
The holes were pegged by Geolithic Geological Services
using a hand held GPS + 3m
The rig was setup over the nominated hole position and
final GPS pickup occurred at the completion of the hole.
MGA94_51
Topography is relatively flat and is more than adequate
given the early stage of the project. A #D drone orthophotographic survey is planned the create a DTM of the
project area.
Refer to Cross Sections and Plans included
Not applicable, no Mineral Resource is being stated.
No compositing has been applied. Intercepts are quoted
as length weighted intervals.
The drill line and drill hole orientation are oriented as
close as possible to normal the target contact zone.
Samples are in the possession of Geolithic personnel
from field collection to laboratory submission.
No audits or reviews have been conducted for this release
given the very small size of the dataset.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria
JORC Code explanation
Commentary
Mineral
Type, reference name/number,
Carr Boyd Nickel Pty Ltd (a wholly owned subsidiary of
tenement and
location and ownership including
ESR) holds a 100% interest in the nickel and base metal
land tenure
agreements or material issues with
rights to the project.
status
third parties such as joint ventures,
There are no known impediments to operate in the area.
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.
Exploration
Acknowledgment and appraisal of
The Carr Boyd Rocks deposit was discovered by Great
done by other
exploration by other parties.
Boulder Mines, in a joint venture with North Kalgurli Ltd
parties
in 1968. The deposit was mined between 1972 and
1975, during which time they explored for additional
breccia pipe occurrences near the mine.
WMC acquired Great Boulder Mines Ltd in 1975, briefly
reopening the mine in 1977 before closing it permanently
shortly thereafter due to a collapse in the nickel price.
The mine had produced 210,000t at 1.44% Ni and 0.46%
Cu before its closure.
From 1968 Pacminex Pty Ltd held most of the ground
over the CBLC outside of the immediate mine area.
Between 1968 and 1971 they conducted extensive
exploration programs searching for large basal contact
and/or stratabound Ni-Cu deposits. It was during this
time that most of the disseminated and cloud sulphide
occurrences such as those at Tregurtha, West Tregurtha
and Gossan Hill were discovered.
Defiance Mining acquired the regional tenements from
Pacminex in 1987 and focused on exploration for PGE
deposits between 1987 and 1990. In 1990 Defiance
purchased the Carr Boyd Rocks mine from WMC and
switched focus to the mine area between 1990 and 2001,
leaving many PGE targets untested.
From 1990 Defiance dewatered the mine to conduct
testwork and feasibility studies on the remnant
mineralisation. Metallurgical testwork, Mineral Resource
estimations, and scoping studies were completed.
Around 1996 the focus shifted again to regional
exploration for large tonnage basal contact deposits.
In 2001 Titan Resources Ltd (Titan) acquired the project
and recommenced economic evaluations of the remnant
material at Carr Boyd Rocks before embarking on
another regional exploration program focusing on the
basal contact. An aeromagnetic survey, airborne EM
reprocessing, and several programs of RAB and RC
drilling were completed.
From 2005 Yilgarn Mining entered a JV with Titan and
continued with some regional exploration, but focused
most attention in and around the Carr Boyd Rocks mine.
In 2007 Titan was acquired by Consolidated Minerals Ltd
(Consmin). Consmin conducted IP surveys and detailed
gravity surveys, but did not drill any targets before selling
the project to Salt Lake Mining (SLM) in 2013. SLM
completed limited drilling to meet expenditure
Criteria
JORC Code explanation
Geology
Deposit type, geological setting and
style of mineralisation.
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
Commentary
commitments, before selling the project to Apollo
Phoenix Resources in 2016.
Apollo sold the project to ESR in 2018.
The Carr Boyd project lies within the Achaean Yilgarn
Craton in a 700km belt of elongate deformed and folded
mafic, ultramafic rocks and volcanic sediments intruded
by granitoids which is referred to as the NorsemanWiluna Belt. The belt has been divided into several
geological distinct terranes, with the project area lying at
the northern end of the Gindalbie terrane (Swager, 1996).
The geology of the Carr Boyd area is dominated by the
Carr Boyd layered mafic-ultramafic intrusive complex
(CBLC). This layered intrusive covers an area of 17 km
by 7km and has intruded into an Achaean
Greenstone/Granite succession. The CBLC is comprised
of a basal sequence of dunites, which are overlain by
peridotites / pyroxenites and above that by gabbros. The
intrusion has been interpreted to have been tilted to the
east with the geometry of the intrusive further
complicated by regional deformation and folding. The
sequence has been metamorphosed to upper
greenschist to lower amphibolite facies.
Several distinctive styles of Ni and Ni-Cu mineralisation
have been identified within the CBLC. At the Carr Boyd
Rocks Nickel Mine Ni-Cu mineralisation is hosted within
several 20 - 60m diameter brecciated pipe-like bodies
that appear to be discordant to the magmatic
stratigraphy. Mineralisation is hosted by a matrix of
sulphides
(pyrrhotite,
pentlandite,
pyrite
and
chalcopyrite) within brecciated Bronzite and altered
country rock clasts.
Stratiform Ni-Cu-PGE mineralisation has been identified
at several different stratigraphic levels within the layered
magmatic complex. Low grade stratiform disseminated
Ni-Cu-PGE sulphides have been identified at several
locations within the basal parts of the complex and at
shallower stratigraphic levels of the complex. The
presence of Ni-Cu-PGE mineralisation within multiple
stratigraphic positions and of several unique styles of
mineralisation highlights the potential of the CBLC for
hosting a substantial Ni-Cu deposit.
The Company is not aware of any significant cobalt
exploration being completed in the area.
All relevant drillhole information can be found in Table 2
of the announcement.
Criteria
Data
aggregation
methods
Relationship
between
mineralisation
widths and
intercept
lengths
Diagrams
Balanced
reporting
Other
substantive
exploration
data
JORC Code explanation
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.
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.
Other exploration data, if meaningful
and material, should be reported
including (but not limited to):
geological
observations;
geophysical
survey
results;
Commentary
No information is excluded.
Intersections are reported on a nominal 0.3% Ni or 0.1%
Cu cut-off with length weighted intervals.
All intercepted are reported using length weighted
intervals to balance with short higher grade lengths.
No metal equivalents are used in this announcement.
The drill line and drill hole orientation in relation to
mineralisation orientation is perpendicular to the MLEM
plate and the geological contact targeted.
True width cannot be fully determined at this stage as the
dip of the contact is not planar or fully controlled due to lack
of drilling. The intersection in CBDD030 is close to true
width as the contacts are near perpendicular to the core
axis.
Maps with drill hole locations are included in the
announcement.
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