TIDMTHR
RNS Number : 1265M
Thor Mining PLC
17 September 2021
17 September 2021
KAPUNDA DRILLING
Kapunda Copper ISR Project, South Australia
Follow the link to view the announcement in full including all
figures:
http://www.rns-pdf.londonstockexchange.com/rns/1265M_1-2021-9-17.pdf
The directors of Thor Mining Plc ("Thor") (AIM, ASX: THR, OTCQB:
THORF) are pleased to advise that drilling has commenced at the
Kapunda Copper ISR Project in South Australia.
EnviroCopper Ltd ("EnviroCopper") (in which Thor holds a 30%
equity interest), in collaboration with MinEx CRC, is undertaking
an innovative Coiled Tube ("CT") drilling program at Kapunda. MinEx
CRC is the world's largest mineral exploration collaboration,
bringing together mining industry (including drilling companies),
government and research organisations. The drilling is designed to
trial technological advancements using a safer, environmentally
friendly mining technology with a low footprint.
Drilling is targeting copper-gold mineralisation approximately
30m from the planned in-situ recovery ("ISR") push/pull test site
to the south of Kapunda township. A geophysics IP anomaly was also
identified in this area by Copper Range Ltd in 2008. The drilling
program is anticipated to take approximately 4 weeks.
A photo of the coiled tube rig may be viewed via the following
link:
http://www.thormining.com/sites/thormining/media/maps/ct-drill-rig.jpg
Nicole Galloway Warland, Managing Director of Thor Mining,
commented:
"It's great to see mineral exploration collaborations between
industry, government and research organisations, such as this
Coiled Tubed ("CT") drilling program between EnviroCopper and MinEx
CRC. Based on geology and access, Kapunda is an ideal location to
be trialling the next generation of CT drilling, whilst collecting
geological information on the copper-gold mineralisation, which is
valuable for the further development of the Kapunda Copper ISR
Project."
A copy of the Project Location Plan may be viewed via the
following link:
http://www.thormining.com/sites/thormining/media/maps/17-007-1b-kapunda-alford-location.jpg
About Kapunda and EnviroCopper
The Kapunda ISR Copper Project is located approximately 90
kilometres north north-east of Adelaide in South Australia (Figure
1).
Thor holds a 30% interest in EnviroCopper, which in turn holds
rights to earn up to a 75% interest in the mineral rights over
metals which may be recovered via ISR contained in the Kapunda
deposit from Australian listed company, Terramin Australia Limited
("Terramin" ASX:TZN). (ASX:THR Announcement 11 November 2020).
For detail of the ISR process, investors are invited to view the
EnviroCopper website: https://www.envirocopper.com.au/
EnviroCopper-MinEX CRC Collaboration
EnviroCopper is an affiliate of the $10M MinEx CRC program and
currently has the CT drilling rig on site at Kapunda. The drill
program will supply geological information to EnviroCopper whilst
testing various aspects of the rig and the solid handling
system.
Copper Range Ltd in November 2008, drilled two reverse
circulation ("RC") drill holes (SK001 and SK002) into an IP
anomaly, with SK002 intersecting 22m @ 0.6% Cu (4-26m) including 4m
@ 2.4% (4-8m) (Open File Envelope ENV11691). The CT rig aims to
validate this mineralisation, in addition to gaining geological
information on the copper mineral species.
Table A: Historic Drill Collar Summary, Coopper Range, 2008
(Sourced from Open File Envelope ENV 11691)
Kapunda MinEX CRC Coil Tube Drilling
MinEx CRC is the world's largest mineral exploration
collaboration bringing together industry, government and research
organisations with a total of $220M funding. For further
information view MinEx CRC website www.minexcrc.com.au
Coiled Tubing drilling offers the potential for rapid, safe,
energy and water-efficient drilling at a fraction of the cost of
conventional techniques. MinEx CRC is building on the RoXplorer(R)
CT technology developed by DET CRC and deployed to field trials in
Nevada in 2018. The Nevada trials confirmed the potential of CT
drilling but showed that there could be improvements to fluid
management, streamline sampling procedures and reduce the footprint
of drill sites. The Kapunda drilling trial represents the next
generation of CT drilling, with these improvements being added to
the platform.
A Location Map of the CT Drill Site showing historic Kapunda
mine workings may be viwed via the following link:
http://cms.thormining.com/sites/thormining/media/maps/coiled-tube-drill-site-location-map.jpg
A plan of the Historic drill collars (ENV 11691) may be viewed
via the folwing link:
http://www.thormining.com/sites/thormining/media/maps/kapunda-historic-drill-collars.jpg
- Ends -
For further information on the Company, please visit
www.thormining.com or contact the following:
Thor Mining PLC
Nicole Galloway Warland, Managing Director Tel: +61 (8) 7324 1935
Ray Ridge, CFO / Company Secretary Tel: +61 (8) 7324 1935
WH Ireland Limited (Nominated Adviser Tel: +44 (0) 207 220
and Joint Broker) 1666
Jessica Cave / Darshan Patel
Jasper Berry (Corporate Broking)
SI Capital Limited (Joint Broker) Tel: +44 (0) 1483 413
500
Nick Emerson
Yellow Jersey (Financial PR) thor@yellowjerseypr.com
Sarah Hollins / Henry Wilkinson Tel: +44 (0) 20 3004
9512
Competent Persons Report
The information in this report that relates to Exploration
Results and the Estimation and Reporting of the Alford East Mineral
Resource Estimation is based on information compiled by Nicole
Galloway Warland, who holds a BSc Applied geology (HONS) and who is
a Member of The Australian Institute of Geoscientists. Ms Galloway
Warland is an employee of Thor Mining PLC. She has sufficient
experience which is relevant to the style of mineralisation and
type of deposit under consideration and to the activity which she
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'. Nicole Galloway
Warland consents to the inclusion in the report of the matters
based on her information in the form and context in which it
appears.
Forward Looking Statements
This document may contain certain forward-looking statements.
Forward-looking statements include, but are not limited to,
statements concerning Thor Mining PLC current expectations,
estimates and projections about the industry in which Thor
operates, and beliefs and assumptions regarding Thor's future
performance. When used in this document, words such as
"anticipate", "could", "plan", "estimate", "expects", "seeks",
"intends", "may", "potential", "should", and similar expressions
are forward-looking statements. Although Thor believes that its
expectations reflected in these forward-looking statements are
reasonable, such statements are subject to known and unknown risks,
uncertainties and other factors, some of which are beyond the
control of Thor and no assurance can be given that actual results
will be consistent with these forward-looking statements
Updates on the Company's activities are regularly posted on
Thor's website www.thormining.com , which includes a facility to
register to receive these updates by email, and on the Company's
twitter page @ThorMining.
About Thor Mining PLC
Thor Mining PLC (AIM, ASX: THR; OTCQB: THORF) is a diversified
resource company quoted on the AIM Market of the London Stock
Exchange, ASX in Australia and OTCQB Market in the United
States.
The Company is advancing its diversified portfolio of precious,
base, energy and strategic metal projects across USA and Australia.
Its focus is on progressing its copper, gold, uranium and vanadium
projects, while seeking investment/JV opportunities to develop its
tungsten assets.
Thor owns 100% of the Ragged Range Project, comprising 92 km(2)
of exploration licences with highly encouraging early stage gold
and nickel results in the Pilbara region of Western Australia, for
which drilling is planned in the second half of 2021.
At Alford East in South Australia, Thor is earning an 80%
interest in copper deposits considered amenable to extraction via
In Situ Recovery techniques (ISR). In January 2021, Thor announced
an Inferred Mineral Resource Estimate of 177,000 tonnes contained
copper & 71,000 oz gold(1).
Thor also holds a 30% interest in Australian copper development
company EnviroCopper Limited, which in turn holds rights to earn up
to a 75% interest in the mineral rights and claims over the
resource on the portion of the historic Kapunda copper mine and the
Alford West copper project, both situated in South Australia, and
both considered amenable to recovery by way of ISR.(2)(3)
Thor holds 100% interest in two private companies with mineral
claims in the US states of Colorado and Utah with historical
high-grade uranium and vanadium, drilling and production
results.
Thor holds 100% of the advanced Molyhil tungsten project,
including indicated and inferred resources , in the Northern
Territory of Australia, which was awarded Major Project Status by
the Northern Territory government in July 2020.
Adjacent to Molyhil, at Bonya, Thor holds a 40% interest in
deposits of tungsten, copper, and vanadium, including Inferred
resource estimates for the Bonya copper deposit, and the White
Violet and Samarkand tungsten deposits.
Thor holds 100% of the Pilot Mountain tungsten project in
Nevada, USA which is subject to a sale option agreement.(6)
Notes
(1)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20210127-maiden-copper.gold-estimate-alford-east-sa.pdf
(2)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20172018/20180222-clarification-kapunda-copper-resource-estimate.pdf
(3)
www.thormining.com/sites/thormining/media/aim-report/20190815-initial-copper-resource-estimate---moonta-project---rns---london-stock-exchange.pdf
(4)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20191011-molyhil-mineral-resource-estimate-enhanced.pdf
(5)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20200129-mineral-resource-estimates---bonya-tungsten--copper.pdf
http://www.thormining.com/sites/thormining/media/pdf/asx-announcements/20210901-pilot-mountain-project-us1.8m-sale-option.pdf
1. APPICES
Checklist of Assessment and Reporting Criteria (JORC Code Table
1)
Section 1: Sampling Techniques and Data
Criteria JORC Code explanation Commentary
Nature and quality of Historic drilling reported
sampling (eg cut channels, Since the cessation of mining,
random chips, or specific Kapunda has been explored
specialised industry by numerous exploration companies.
standard Five of these companies undertook
measurement tools drilling and their work is
appropriate summarized below.
to the minerals under The 2008 drilling undertaken
investigation, such as by Copper Range utilized reverse
down hole gamma sondes, circulation with the first
or handheld XRF instruments, 6m collared using a 6 1/2
etc). These examples should inch hammer bit. Individual
not be taken as limiting metre sample intervals were
the broad meaning of collected in 600x900mmx150um
sampling. plastic bags fitted to a rig
mounted cyclone. A sub sample
for analysis was then collected
in a calico bag by passing
the whole metre sample through
a two-tier riffle splitter.
A summary of the drilling
undertaken at Kapunda is presented
in table below.
Diamond core holes Total
KP Mines Exploration (1965-66)
3
K Northlands (1972-73) 52
KD Utah (1974-76) 23
Total diamond core holes 78
Percussion Holes
KV Mines Exploration (1965-66)
43
M Noranda (1970) 24
Z Noranda (1970) 1
KP Utah (1974-76) 36
SM Copper Range (2008) 1
SK Copper Range (2008) 4
Total percussion holes 109
Total drillholes 187
Total meterage of all drillholes
- f 22,712.8m.
============================= =================================================================
Include reference to Core was aligned and measured
measures by tape, comparing back to
taken to ensure sample downhole core blocks consistent
representivity and the with industry practice. Documentation
appropriate calibration indicates that the diamond
of any measurement tools and percussion drilling was
or systems used. completed by previous operators
to industry standard at that
time.
============================= =================================================================
Aspects of the
determination
of mineralisation that Sampling was to industry standard
are Material to the Public at the time of drilling, with
Report. In cases where samples collected from various
'industry standard' work interval sizes depending on
has been done this would the company involved. Samples
be relatively simple (eg were assayed at certified
'reverse circulation laboratories.
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, Copper Range's SK series holes
reverse were drilled using reverse
circulation, open-hole circulation.
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).
============================= =================================================================
Drill sample Method of recording and Core recovery was measured
recovery assessing core and chip for each drill run between
sample recoveries and the driller's marker blocks.
results assessed.
No historic information is
available for KP series holes.
============================= =================================================================
Measures taken to maximise The historic records describe
sample recovery and ensure in length (as detailed above)
representative nature the efforts that went into
of the samples. maximizing core recovery.
============================= =================================================================
Whether a relationship Statistical analysis indicates
exists between sample no significant sample bias
recovery and grade and caused by preferential loss/gain
whether sample bias may of course/fine material.
have occurred due to
preferential
loss/gain of fine/coarse
material.
============================= =================================================================
Logging Whether core and chip All drillholes have been geologically
samples have been logged for recovery, lithology,
geologically mineralisation and colour
and geotechnically logged with abundant petrographical
to a level of detail to and petrological studies to
support appropriate Mineral adequately support the Mineral
Resource estimation, mining Resource estimation, mining
studies and metallurgical studies and metallurgical
studies. studies.
SK series holes were logged
for recovery, rock type, mineralisation
and a geological description
which included, colour, texture
and grainsize. A total of
98 petrographic samples and
70 petrological samples were
described.
Geotechnical logging has been
undertaken by Environmental
Copper Recovery Pty Ltd (ECR)
geologists on drill core stored
at the South Australian Drill
Core Reference Library.
============================= =================================================================
Whether logging is Logging is qualitative based
qualitative on visual field estimates.
or quantitative in nature. Qualitative code logging was
Core (or costean, channel, conducted for lithology, alteration,
etc) photography. veining, tone and colour.
============================= =================================================================
The total length and Entire holes are logged in
percentage all instances.
of the relevant
intersections
logged.
============================= =================================================================
Sub-sampling If core, whether cut or RC Reported only
techniques sawn and whether quarter,
and sample half or all core taken.
preparation
============================= =================================================================
If non-core, whether The 2008 drilling undertaken
riffled, by Copper Range utilized reverse
tube sampled, rotary split, circulation with the first
etc and whether sampled 6m collared using a 6 1/2
wet or dry. inch hammer bit. Individual
metre sample intervals were
collected in 600x900mmx150um
plastic bags fitted to a rig
mounted cyclone. A sub sample
for analysis was then collected
in a calico bag by passing
the whole metre sample through
a two-tier riffle splitter.
============================= =================================================================
For all sample types, Documented sample preparation
the nature, quality and techniques followed best practice
appropriateness of the of the time and are considered
sample preparation adequate.
technique.
============================= =================================================================
Quality control procedures No additional historical information
adopted for all is available on quality control
sub-sampling procedures to that detailed
stages to maximise above.
representivity
of samples.
============================= =================================================================
Measures taken to ensure Techniques followed best practice
that the sampling is of the time including regular
representative cleaning of the cyclones and
of the in situ material splitters and careful flushing
collected, including for of holes when water encountered.
instance results for field
duplicate/second-half
sampling.
============================= =================================================================
Whether sample sizes are
appropriate to the grain Sample sizes are considered
size of the material being appropriate.
sampled.
============================= =================================================================
Quality of The nature, quality and Assaying was carried out at
assay data appropriateness of the certified analytical laboratories
and laboratory assaying and laboratory and the techniques are considered
tests procedures used and whether appropriate, although little
the technique is considered historical information is
partial or total. available on checks and standards.
No information is available
on checks and standards.
============================= =================================================================
For geophysical tools, Geophysical tools, spectrometers,
spectrometers, handheld handheld XRF instruments,
XRF instruments, etc, etc. were not available to
the parameters used in earlier companies.
determining the analysis
including instrument make No geophysical tools were
and model, reading times, used by Terramin to estimate
calibrations factors applied published mineral or element
and their derivation, percentages.
etc.
============================= =================================================================
Nature of quality control Minimal historical information
procedures adopted (eg is available on the use of
standards, blanks, standards, blanks or duplicates.
duplicates,
external laboratory checks) The use of check analyses
and whether acceptable were documented by Northland.
levels of accuracy (ie Check analyses were undertaken
lack of bias) and precision at their main laboratory,
have been established. Amdel and cross lab checks
done at Robertson Research
and McPhar Geophysics.
Original assay reports from
Amdel show that at the time
they ran a mix of standards
and blanks every fifteenth
sample, although the results
of these internal lab checks
were not documented.
============================= =================================================================
Verification The verification of
of sampling significant Utah's KD005 which returned
and assaying intersections by either from 45m, 27m @ 1.18% copper
independent or alternative was resampled by Copper Range
company personnel. in 2007. Copper Range's resampling
returned from 45m, 27m @ 1.20%
copper.
Utah's deep intercept of primary
copper sulphide in KD011 returned
from 426m, 11m @ 2.00% copper
was resampled by Terramin
returned from 426m, 11m @
1.89% copper and 0.1g/t gold.
Terramin's samples were a
quarter cut of the remaining
half core sample. (TZN ASX
announcement - 1(st) Quarter
Report, 29/4/2016)
Other significant intersections
from drill core have been
visually reviewed by Terramin
and ECR staff. Terramin has
also utilised a hand held
XRF to validate copper assays
of percussion holes stored
at the South Australian Drill
Core Reference Library.
============================= =================================================================
The use of twinned holes. There were two sets of planned
twin holes: KD001 twinned
drillhole K015 and KD0019
twinned drillholes KP046 and
K076. There are a further
6 pairs of drillholes that
are close enough to be considered
twins.
As part of compiling data
for the Kapunda Mineral Resource
estimate it was deemed necessary
to be comfortable with the
wide variety of drilling and
sampling methods used on the
Kapunda Project over a number
of years.
In order to look at the issue
it was decided to;
* Compare summary statistics for the different
drillhole series.
* Compare a selection of twined holes.
* Compare poor recovery core holes with good recovery
drillholes
* Compare rotary drilling with diamond drilling within
a specific, geologically constrained spatial area.
* The process entailed creating a 2m downhole composite
set of drill assays and splitting these into their
component drill series types for statistical
analysis.
Results;
* The results in general show no significant bias due
to drilling type.
* Twin holes Q-Q plots indicate there is little bias.
* There appears to be very little difference between
holes with poor core recovery versus those with good
core recovery.
* While there are some individual difference between
rotary and diamond holes, looking at a larger sample
they appear to give relatively consistent results.
============================= =================================================================
Documentation of primary Primary data was recorded
data, data entry on paper log sheets, photocopies
procedures, of originals were submitted
data verification, data as part of statutory reporting.
storage (physical and These have subsequently been
electronic) protocols. scanned to PDF and made available
online at South Australian
Resources and Information
Gateway (SARIG)in the Resource
and Energy Georeference Database.
Terramin was also able to
obtain digital data sets of
the drill data from Copper
Range Ltd and the digital
data set used by Stuart Metals
NL (Stuart Metals) for their
1992 Kapunda Resource estimate.
Where differences were found
between the data contained
in the original company reports
and the data provided by Stuart
Metals database, the original
companies' values were used.
The data was entered into
Excel spreadsheets before
being imported into a Maxwell
Geo Services' DataShed and
QAQCR which was used to validate
the data viz; overlapping
intervals, excessive drillhole
deviation, assay QAQC. Secondary
validation by Maptek's Vulcan
software and visual validation
was also undertaken.
============================= =================================================================
Discuss any adjustment No adjustments are made to
to assay data. reported summary intersections.
The Mineral Resource estimate
makes an allowance for core
loss with lost intervals assumed
to have a zero grade.
============================= =================================================================
Location of Accuracy and quality of Mines Exploration established
data points surveys used to locate the original grid baseline
drill holes (collar and parallel to main strike of
down-hole surveys), mineralization with grid north
trenches, at 335 degrees magnetic. All
mine workings and other subsequent companies, except
locations used in Mineral for Copper Range used this
Resource estimation. grid. Copper Range use GDA94
Zone 53
Initial survey control was
by licensed surveyor using
theodolite. Collars were fixed
by theodolite surveys and
metal pin bench marks. Coordinate
position 1000N 00E (collar
of drillhole KV002).
To allow for the incorporation
of drillhole data from Copper
Range an affine transformation
was used to convert the earlier
drillhole coordinates to MGA
Zone 54 (GDA 94).
============================= =================================================================
Specification of the grid The data is reported in grid
system used. system MGA Zone 54 (GDA94).
============================= =================================================================
Quality and adequacy of In 1972 Northland Minerals
topographic control. contracted surveying consultants
Alex & Symonds Pty Ltd to
survey the site and locate
drill collars. The level datum
used throughout the grid and
drillhole levelling is based
upon a Lands Department Bench
Mark Number 6921.
A digital terrain model was
created by Terramin from the
survey's 528 survey points
collected across the deposit.
Drillhole collar RL's not
picked up during this survey
were then assigned a value
from this surface.
With the exception of the
historic workings, the area
has low relief. The site has
a gentle slope to the south,
over the 1,500m of strike
length there is just a maximum
difference of 25m in collar
RLs.
============================= =================================================================
Data spacing Data spacing for reporting Drillhole spacings and sample
and distribution of Exploration Results. interval lengths are considered
appropriate.
============================= =================================================================
Whether the data spacing The data spacing and the characteristics
and distribution is of the Kapunda mineralisation
sufficient determined from reviewing
to establish the degree historical drilling results,
of geological and grade and visual inspections of
continuity appropriate the core are suitable for
for the Mineral Resource the defined Mineral Resource
and Ore Reserve estimation to be classified as Inferred
procedure(s) and for ISR.
classifications However, the protocol for
applied. estimation and reporting of
Mineral Resources for exploitation
using ISR has a number of
additional steps compared
to conventional mining and
processing. Before any portion
of the Kapunda Mineral Resource
can be classified as Indicated
or Measured pump testing and
hydrogeological modeling will
be required.
============================= =================================================================
Whether sample compositing Field sample compositing was
has been applied. not undertaken on any of the
diamond or percussion drill
samples. Sample sizes are
considered appropriate.
============================= =================================================================
Orientation Whether the orientation The orientation of the drilling
of data in of sampling achieves is considered to be appropriate
relation to unbiased for the oxide copper and secondary
geological sampling of possible copper sulphide mineralisation.
structure structures
and the extent to which
this is known, considering
the deposit type.
============================= =================================================================
If the relationship between Drilling orientation is not
the drilling orientation deemed to have introduced
and the orientation of any significant sampling bias.
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 Chain of custody management
ensure sample security. was not documented.
============================= =================================================================
Audits or The results of any audits Prior to acquiring the Kapunda
reviews or reviews of sampling Project from Maximus Resources
techniques and data. Ltd (Maximus), Terramin audited
the Stuart Metals database
against original reports and
viewed drill core at the South
Australian Drill Core Reference
Library.
Historical density techniques
were considered inappropriate
and discarded. New measurements
collected by TZN and ERC show
that density had previously
been overcalled by over 10%.
All data was loaded into a
DataShed database and validated.
Mineralisation was then visually
checked and modelled using
Maptek's Vulcan.
Re-assaying of drill core
by Copper Range and Terramin
has confirmed the veracity
of original sampling techniques
and results.
External audits and review
of modelling techniques and
data has been undertaken by
Leon Faulkner from ECR.
============================= =================================================================
Section 2: Reporting for Exploration Results
Criteria JORC Code explanation Commentary
Mineral tenement Type, reference name/number, The Kapunda Mineral Resource
and land tenure location and ownership is located approximately 90
status including agreements or km north of Adelaide and sits
material issues with third within exploration license
parties such as joint ventures, (EL) 6198 held by Terramin
partnerships, overriding Exploration Pty Ltd (Terramin
royalties, native title Exploration). EL 6198 is
interests, historical sites, currently
wilderness or national in good standing and owned
park and environmental 100% by Terramin Exploration.
settings. In August 2017 Terramin
Exploration
entered a joint venture
agreement
with ECR (TZN ASX
announcement
- New Copper Joint Venture
Development, 2/8/2017) who
will investigate the
potential
to extract the copper through
low cost in-situ recovery
(ISR) from shallow oxide ores
in and around the historic
Kapunda Mine area.
The majority of the Mineral
Resource sits beneath the
heritage listed Kapunda Mine
historic site which is owned
by Light Regional Council.
The southern extent of the
Mineral Resource sits beneath
freehold farmland.
With the Kapunda Mine
historic
site heritage listed and the
encroachment of housing
within
a few hundred metres of the
site there is no likelihood
of extracting copper by
traditional
open cut or underground
mining
techniques. ISR is seen as
the only potential method
that could be permitted to
extract copper.
The site consists of an
unrehabiliated
historic mining site covered
by numerous old workings
including
open cut pits, shafts and
waste dumps. There are also
remnants of Australia's first
heap leach trials which were
undertaken in the 1950's.
Vegetation regrowth has been
minimal because of the high
copper content of the soils
and a large portion of the
historic workings fenced off
for the safety of the general
public.
------------------------------------------------------------ ------------------------------
The security of the tenure EL 5262 is currently in good
held at the time of reporting standing. The majority of
along with any known impediments the project area falls within
to obtaining a licence the Kapunda Mine historic
to operate in the area. site which is owned by the
Light Regional Council and
as such the land is
classified
as exempt land under the
South
Australian Mining Act 1971.
This will require a waiver
of exemption to be signed
before any exploration or
mining activities can take
place.
Clearance from the Department
of Environment, Water and
Natural Resources (DEWNR)
will be required before
activities
can be conducted within the
Heritage Site.
Proximity to the Kapunda
township
means that significant
community
engagement will need to be
carried out before
preliminary
testing or mining operations
can be conducted.
============================================================ ==============================
Exploration Acknowledgment and appraisal Since the cessation of
done by other of exploration by other mining,
parties parties. Kapunda has been explored
by several different
government
agencies and exploration
companies
including.
SA Dept of Mines (1961-64)
Mines Exploration (Broken
Hill South) (1964-69)
Minefields Exploration (1970)
Noranda (1970)
Northern Minerals Syndicate
(1970-72)
Northland Minerals (1971-85)
(including
Utah Development Co.
(1974-78)
Aztec Minerals Ltd (1987-88)
Shell company (1995)
Stuart Metals (1995-99)
Minefinders Pty Ltd
(1999-2000)
Flinders Mines Ltd (2003-08)
Copper Range (2007 - 09)
Maximus (2008-2013)
Terramin (2013-present)
Work carried out by these
groups has included
geophysics,
mapping, rock chip sampling,
trenching, percussion and
diamond drilling.
Metallurgical and economic
studies on the feasibility
of restarting the Kapunda
mine have been undertaken
on at least 2 occasions.
The largest phases of
exploration
occurred during the
mid-1960's
through to the mid 1970's
with several groups
undertaking
detailed drilling programs.
A brief summary of the larger
drilling programs is provided
below. Detail is available
in the open file envelopes
on the South Australian
government's
SARIG website.
Mines Exploration Pty. Ltd.
3 Diamond holes
45 Percussion holes
Noranda Australia Ltd.
56 percussion holes
Northland Minerals Ltd.
53 diamond holes
369 Auger holes (not used
in the Mineral Resource
estimate)
11 percussion holes
Utah Development Co.
18 diamond core holes
66 non-core holes
Copper Range
4 RC holes
1 Diamond core hole
============================================================ ==============================
Geology Deposit type, geological The Kapunda Mineral Resource
setting and style of mineralisation. is located in the Tindelpina
Shale Member of the Tapley
Hill Formation.
It is a structurally
controlled
copper deposit with the
orebody
sitting on the western limb
of an antiform with primary
copper mineralisation
consisting
of an en echelon series of
lodes striking at 020
degrees
magnetic and dipping 70
degrees
west.
Secondary supergene
enrichment
has taken place leading to
the development of a
significant
copper enriched zone with
kaolinized metasediments.
Mineral species targeted by
this Kapunda Mineral Resource
include copper oxides
(azurite,
malachite and cuprite) and
secondary copper sulphide
minerals (chalcocite and
covellite)
within 100m of surface.
============================================================ ==============================
Drill hole A summary of all information No new drillhole data or
Information material to the understanding other
of the exploration results exploration results are
including a tabulation reported.
of the following information All information has been
for all Material drill compiled
holes: from "open file envelopes"
available for download
through
the South Australian
Government's
SARIG website-
http://map.sarig.sa.gov.au/
easting and northing of
the drill hole collar
------------------------------------------------------------ ------------------------------
elevation or RL (Reduced
Level - elevation above
sea level in metres) of
the drill hole collar
------------------------------------------------------------ ------------------------------
dip and azimuth of the
hole
------------------------------------------------------------
down hole length and interception
depth
hole length.
============================================================ ------------------------------
If the exclusion of this No new exploration results
information is justified have been reported, all
on the basis that the information information
is not Material and this is publicly available from
exclusion does not detract SARIG.
from the understanding
of the report, the Competent
Person should clearly explain
why this is the case.
Data aggregation In reporting Exploration No new exploration results
methods Results, weighting averaging have been reported, all
techniques, maximum and/or information
minimum grade truncations is publicly available from
(eg cutting of high grades) SARIG.
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.
============================================================ ==============================
No metal equivalents are
* The assumptions used for any reporting of metal reported.
equivalent values should be clearly stated.
============================================================ ==============================
Relationship No new exploration results
between mineralisation * These relationships are particularly important in the have been reported, all
widths and reporting of Exploration Results. information
intercept is publicly available from
lengths SARIG.
* 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').
============================================================ ==============================
Diagrams Appropriate maps and diagrams
* Appropriate maps and sections (with scales) and included in announcement
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.
============================================================ ==============================
Balanced reporting No new exploration results
* Where comprehensive reporting of all Exploration have been reported, all
Results is not practicable, representative reporting information
of both low and high grades and/or widths should be is publicly available from
practiced to avoid misleading reporting of SARIG.
Exploration Results.
============================================================ ==============================
Other substantive The overall copper grade of
exploration * Other exploration data, if meaningful and material, the Mineral Resource estimate
data should be reported including (but not limited to): fits within the accepted
geological observations; geophysical survey results; parameters
geochemical survey results; bulk samples - size and for copper ISR operations.
method of treatment; metallurgical test results; bulk Initial hydrogeological
density, groundwater, geotechnical and rock investigations
characteristics; potential deleterious or show that the en echelon and
contaminating substances. conjugate fracture systems
provide transmissivity values
within the range needed for
successful ISR operations.
============================================================ ==============================
Further work Following approvals from the
* The nature and scale of planned further work (eg Light Regional Council and
tests for lateral extensions or depth extensions or regulators, a groundwater
large-scale step-out drilling). sample from the mineralized
lode system will be collected
and be used in the laboratory
testing of lixiviant systems
on core samples to be
undertaken
by CSIRO.
Further hydrogeological
investigations
including aquifer pump
testing
and beneficial use studies
will be undertaken.
Understanding the
hydrogeology
of the area is critical to
the Kapunda Project.
Consequently,
detailed hydrogeological
investigations
will be undertaken to
accurately
model groundwater parameters.
These models will allow ECR
to undertake design work to
ensure that there is no
compromising
existing users' water quality
or ability to access water.
Groundwater Science has been
engaged by ECR to carry out
further groundwater studies.
============================================================ ==============================
Additional drilling is
* Diagrams clearly highlighting the areas of possible required
extensions, including the main geological to better define and
interpretations and future drilling areas, provided potentially
this information is not commercially sensitive. extend the southern limits
of the Kapunda
mineralisation,
Figure 2.
============================================================ ==============================
This information is provided by RNS, the news service of the
London Stock Exchange. RNS is approved by the Financial Conduct
Authority to act as a Primary Information Provider in the United
Kingdom. Terms and conditions relating to the use and distribution
of this information may apply. For further information, please
contact rns@lseg.com or visit www.rns.com.
RNS may use your IP address to confirm compliance with the terms
and conditions, to analyse how you engage with the information
contained in this communication, and to share such analysis on an
anonymised basis with others as part of our commercial services.
For further information about how RNS and the London Stock Exchange
use the personal data you provide us, please see our Privacy
Policy.
END
DRLDKOBPPBKKNCD
(END) Dow Jones Newswires
September 17, 2021 02:00 ET (06:00 GMT)
Thor Energy (LSE:THR)
Gráfica de Acción Histórica
De Mar 2024 a Abr 2024
Thor Energy (LSE:THR)
Gráfica de Acción Histórica
De Abr 2023 a Abr 2024
