Jervois delivers high copper grades at Rockface
Released
Released
Announcement PDF
www.kglresources.com.au
22 October 2015
Jervois delivers high copper grades at Rockface
Highlights
Diamond hole KJCD171 intersects a broad interval of high‐grade copper mineralisation:
13m @ 2.14% Cu, 12.5g/t Ag, 0.10g/t Au from 255 m
2m @ 2.83% Cu, 10.8g/t Ag, 0.05g/t Au from 278 m
Mineralisation coincides with a strong, IP chargeability and conductivity anomaly
Strong DHEM conductors detected in‐hole and off‐hole extending 300m below current resource
KGL Resources (KGL) recently completed a 3D ‐ Induced Polarisation (3DIP) & Magnetotelluric (MT) survey in the
Bellbird region to search for additional sulphide mineralisation in a poorly tested and yet highly prospective portion
of the 12km long mineralised corridor at Jervois (Northern Territory). A strong coincident IP chargeability and
conductivity response was modelled at the Rockface prospect that extends to a vertical depth of over 400m, the
limit of the survey. The IP anomaly is located under a prominent ironstone ridge with copper occurrences.
Hole KJCD171 intersected intervals of disseminated mineralisation from 205m in garnet‐chlorite altered sediments
followed by 14m of massive magnetite‐chalcopyrite from 253.5m to 267.5m. Garnet‐chlorite schist and magnetite
are typical of the host rocks for other sulphide resources within the project area. The sulphide intersection is deeper
than any previous hole drilled at Rockface and well below the current Inferred resource boundary (Figures 1 & 2).
Figure 1 DHEM Conductive plates in KJCD171
www.kglresources.com.au
A Down Hole Electro‐Magnetics (DHEM) survey was completed on KJCD171 to delineate the extent of the sulphide
mineralisation and to identify off‐hole conductors that may represent additional lenses of high‐grade mineralisation.
Modelling of the DHEM by Newexco identified three good conductors. The hole pierced the top corner of Conductor
1 and 2 while Conductor 3 was not intersected and sits deeper beneath the hole, extending to 300m below the
existing resource.
The average density of the high‐grade zone in KJCD171 is 4.33 t/m3, which is considerably higher than most of the
resource that is closer to 3 t/m3 implying a higher copper metal content per cubic metre of rock than elsewhere at
Jervois given the same grades.
Simon Milroy, the Managing Director of KGL Resources comments, “Detection of strong off‐hole EM conductors
extending below KJCD171 is driving a reassessment of the potential at Rockface. The width and grade of the
mineralisation is better than in any previous drilling closer to the surface and in outcrop. Rockface appears to be
improving with depth.”
“The Rockface trend does not currently feature in our PFS mine schedule but has the potential to add a new open pit
and underground mine to the project. It is exciting to see a commitment to exploration generate further upside to
the project at these grades.”
The 3DIP technique responds well to disseminated sulphides and we are seeing low‐grade disseminated copper
mineralisation in each of the chargeability anomalies targeted. The assay results from hole KJCD171 are the best
intersection in this program to date though other drilling has intercepted high grades but narrow intercepts
including:
2m @ 3.18% Cu, 11.8g/t Ag, 0.03g/t Au from 19 m (KJC167) Target A
4m @ 0.51% Cu, 1.09% Pb, 4.27% Zn, 16.4g/t Ag, from 119 m (KJC169) Bellbird East
Figure 2 Rockface‐Rockhole long section with copper grade thickness of block model
www.kglresources.com.au
Figure 3 3DIP Chargeability depth slice at RL 100m
Figure 4 Jervois Proposed Site Layout
www.kglresources.com.au
Table 1 Table of significant results
Easting (m)
Northing (m)
RL (m)
Dip
Azimuth
BOX1
(m)
Total Depth
(m)
From
(m)
To
(m)
Interval
(m)
ETW2
(m)
Cu
%
Pb
%
Zn
%
Ag
g/t
Au
g/t
KJC167
627740
7489978
363
‐59
175
42
232
KJC169
KJC170
KJCD171
627438
628496
628331
7490548
7490480
7490510
368
366
363
‐56
‐66
‐68
62
125
167
30
42
37
147
439
502
19
89
119
368
255
269
278
21
90
123
369
268
270
280
2
1
4
1
13
1
2
1.3
0.7
3.1
0.9
10.0
0.8
1.5
3.18
0.87
0.51
0.5
2.14
0.71
2.83
0.02
0.02
1.09
0
0.02
0.01
0
0.03
0.02
4.27
0.03
0.08
0.05
0.07
11.8
3
16.4
1.5
12.5
5.3
10.8
0.03
0.02
0
0
0.1
0
0.05
Hole ID
1
Base of Oxidisation down hole depth
2
Estimated True Width
For further information contact:
Mr Simon Milroy
Managing Director
Phone: (07) 3071 9003
About KGL Resources
KGL Resources Limited is an Australian mineral exploration company focussed on increasing the high grade Resource at the Jervois Copper-Silver-Gold Project in the
Northern Territory and developing it into a multi-metal mine.
Competent Person Statement
The Jervois Exploration data in this report is based on information compiled by Martin Bennett, who is a member of the Australian Institute of Geoscientists and a full time employee of KGL Resources Limited. Mr.
Bennett has sufficient experience which is relevant to the style of the mineralisation and the type of deposit under consideration and to the activity to which 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 Resources and Ore Reserves. Mr. Bennett has consented to the inclusion of this information in the form and context in
which it appears in this report.The following drill holes were originally reported on the date indicated and using the JORC code specified in the table. Results reported under JORC 2004 have not been updated to
comply with JORC 2012 on the basis that the information has not materially changed since it was last reported.
Hole
Date originally Reported
JORC Reported Under
KJC033
08/11/2013
2004
KJC035
08/11/2013
2004
RJ159
15/08/2011
2004
J9
16/05/2011
2004
JOC141
01/08/2014
2012
www.kglresources.com.au
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
techniques
Diamond drilling and reverse circulation
(RC) drilling were used to obtain samples
for geological logging and assaying.
RC drill holes are sampled at 1m intervals
and split using a cone splitter attached to
the cyclone to generate a split of ~3kg.
Diamond core was quartered with a
diamond saw and generally sampled at 1m
intervals with shorter samples at geological
contacts.
RC samples are routinely scanned with a
Niton XRF. Samples assaying greater
than 0.1% Cu, Pb or Zn are submitted for
analysis at a commercial laboratory.
Other sampling techniques may have been
used prior to KGL Resources involvement
in 2011.
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.
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).
RC Drilling was conducted using a reverse
circulation rig with a 5.25” face-sampling
bit. Diamond drilling was either in NQ or
HQ drill diameters.
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 nature of the samples.
RC samples were not weighed on a regular
basis but no sample recovery issues were
encountered during the drilling program.
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.
All RC and diamond core samples are
geologically logged. Core samples are
also orientated and logged for geotechnical
information.
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.
RC drill holes are sampled at 1m intervals
and split using a cone splitter attached to
the cyclone to generate a split of ~3kg.
Diamond core was quartered with a
diamond saw and generally sampled at 1m
intervals with shorter samples at geological
contacts.
Logging
Sub‐sampling
techniques and
sample
preparation
Quality of assay
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.
RC sample splits (~3kg) are pulverized to
85% passing 75 microns.
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.
Diamond core samples are crushed to 70%
passing 6mm and then pulverized to 85%
passing 75 microns.
Whether sample sizes are appropriate to the grain size of the
material being sampled.
Sampling techniques used by KGL are
appropriate and generate sub-samples for
analysis that are representative of the
whole sample.
The nature, quality and appropriateness of the assaying and
The QAQC data includes standards,
www.kglresources.com.au
Criteria
JORC Code explanation
data and
laboratory tests
Location of data
points
Data spacing and
distribution
Orientation of data
in relation to
geological
structure
duplicates and laboratory checks. In ore
zones Standards are added at a ratio of
1:10 and duplicates and blanks 1:20.
laboratory procedures used and whether the technique is
considered partial or total.
Verification of
sampling and
assaying
Commentary
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.
Basemetal samples are assayed using a
four acid digest with an ICP AES finish.
Gold samples are assayed by Aqua Regia
with an ICP MS finish. Samples over
1ppm Au are re-assayed by Fire Assay
with an AAS finish.
An umpire laboratory is used to check ~1%
of samples analysed.
Assay methods are appropriate for the
style of mineralisation and provide results
of acceptable accuracy.
The verification of significant intersections by either
independent or alternative company personnel.
Data is validated on entry into the
Datashed database.
The use of twinned holes.
Further validation is conducted when data
is imported into Vulcan.
Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic) protocols.
Discuss any adjustment to assay data.
Below detection limit results are replaced
in the database with values of half the
detection limit.
Selected holes are twinned.
Intersections in selected historic holes
were visually validated.
Surface collar surveys were picked up
using a Trimble DGPS.
Downhole surveys were taken during
drilling with a Ranger or Reflex survey tool
every 30m with checks conducted with a
Gyrosmart gyro and Azimuth Aligner.
All drilling is conducted on the MGA 94
Zone 53 grid. All downhole magnetic
surveys were converted to MGA 94 grid.
A digital terrain model was generated using
grid based DGPS data and surveyed
drillhole collar data.
Drilling for Inferred resources has been
conducted at a spacing of 50m along strike
and 80m within the plane of the
mineralized zone. Closer spaced drilling
was used for Indicated resources.
Shallow oxide RC drilling was conducted
on 80m spaced traverses with holes 10m
apart.
4m RC composite samples were used in
unmineralised portions of the hangingwall
and footwall.
Holes were drilled perpendicular to the
strike of the mineralization a default angle
of -60 degrees but holes vary from -45 to 80.
There is no sampling bias based on drill
hole orientation.
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.
Sample security
The measures taken to ensure sample security.
Samples were stored in sealed polyweave
bags on site and transported to the
laboratory at regular intervals by KGL staff.
Audits or reviews
The results of any audits or reviews of sampling techniques
and data.
The sampling techniques are regularly
reviewed.
www.kglresources.com.au
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
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
in the area.
Exploration done
by other parties
Acknowledgment and appraisal of exploration by other
parties.
Geology
Deposit type, geological setting and style of mineralisation.
Drill hole
Information
Data aggregation
methods
Relationship
between
mineralisation
widths and
intercept lengths
A summary of all information material to the understanding of
the exploration results including a tabulation of the following
information for all Material drill holes:
o
easting and northing of the drill hole collar
o
elevation or RL (Reduced Level – elevation above sea
level in metres) of the drill hole collar
o
dip and azimuth of the hole
o
down hole length and interception depth
o
hole length.
If the exclusion of this information is justified on the basis that
the information is not Material and this exclusion does not
detract from the understanding of the report, the Competent
Person should clearly explain why this is the case.
In reporting Exploration Results, weighting averaging
techniques, maximum and/or minimum grade truncations (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
The Jervois project is within E25429 and
contains two Mining Leases, ML30180 and
ML30182 and one application MLA30829,
all 100% owned by Jinka Minerals and
operated by Kentor Minerals (NT), both
wholly owned subsidiaries of KGL
Resources.
The Jervois project is covered by Mining
Licences owned by KGL Resources
subsidiary Jinka Minerals.
Previous exploration has primarily been
conducted by Reward Minerals, MIM and
Plenty River.
E25429, ML30180, ML30182 and
MLA30829 lie on the Huckitta 1: 250 000
map sheet (SF 53-11). The tenement is
located mainly within the PalaeoProterozoic Bonya Metamorphics on the
northeastern boundary of the Arunta
Orogenic Domain. The Arunta Orogenic
Domain in the north western part of the
tenement is overlain unconformably by
Neo-Proterozoic sediments of the
Georgina Basin.
The copper-lead-zinc mineralisation is
interpreted to be stratabound in nature,
probably relating to the discharge of base
metal-rich fluids in association with
volcanism or metamorphism or dewatering
of the underlying rocks at a particular time
in the geological history of the area.
Refer Table 1
Refer Table 1
Refer Table 1
www.kglresources.com.au
Criteria
JORC Code explanation
Commentary
length, true width 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.
Refer Figures 1,2,3 &4
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.
Refer Table 1
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.
Outcrop mapping of exploration targets
using Real time DGPS.
Further work
The nature and scale of planned further work (eg tests for
lateral extensions or depth extensions or large-scale step-out
drilling).
Refer Figure 1
Diagrams clearly highlighting the areas of possible
extensions, including the main geological interpretations and
future drilling areas, provided this information is not
commercially sensitive.
Share your feedback
Discover