TIDMARCM
RNS Number : 0618W
Arc Minerals Limited
15 August 2022
15 August 2022
Arc Minerals Ltd
('Arc' or the 'Company')
Maiden Exploration Drilling Programme Commenced - Kalahari
Copper Belt, Botswana
Update on Anglo American Transaction
Arc Minerals the Africa focussed copper company is pleased to
announce the commencement of its maiden exploration drilling
programme at its Virgo Project in Botswana. This maiden drill
programme is designed to test geochemical anomalies identified in
the Virgo licenses located within the highly prospective Central
Structural Corridor of the Kalahari Copper Belt ('KCB'). The
initial programme will start off with shallow percussion holes that
will be followed up by reverse circulation and diamond core drill
holes targeting the interpreted Ngwako Pan / D'Kar Formation
contacts in these licenses.
Highlights
-- Soil geochemical anomalies overlay contact geology interpreted from magnetic survey
-- Anomalies extend for 3km and 2.5km along the interpreted contact respectively
-- Relatively shallow Kalahari Sands cover expected
Nick von Schirnding, Executive Chairman of Arc Minerals,
commented:
"The Kalahari Copper Belt is increasingly becoming one of the
most prospective copper belts and I am delighted that we have now
commenced with our maiden drill programme. The initial percussion
holes will be used to define the location of the interpreted Ngwako
Pan and D'Kar Formation contact, following which this contact will
be drill tested.
"With respect to the Anglo American transaction in Zambia,
substantial progress has been made with providing the requested
information as part of the due diligence process. However, this is
ongoing, in part impacted due to recent temporary closures of the
Mining Cadastre by the Zambian Ministry of Mines and the
confirmation of certain information relating to the exploration
licences. Accordingly, a second 90 day exclusivity period will
commence to allow sufficient time for the conclusion of the due
diligence and the negotiation and execution of the Joint Venture
Documents as contemplated in the original announcement of 12 May
2022 relating to the transaction ."
Background to the Exploration Drill Programme
The soil geochemistry survey across the Virgo Project ("Virgo")
that consists of PL 135/2017 & PL 162/2017 license areas,
provided encouraging results for potential mineralisation along the
DKF-NPF contact.
PL135/2017 - Interpreted geology, Copper in soils assay results
and Nickel in Soils Contours
PL162/2017 - Interpreted geology, Copper in soils assay results
and Nickel in Soils Contours
At each of the license areas, the drill hole programme will
initially comprise of an initial three hole Percussion/Rotary Air
Blast 'RAB' programme over the centre of the soil anomaly to
identify the lithologies below the Kalahari sand cover and confirm
the presence of the D'Kar - Ngwako Pan contact. A further three
hole Reverse Circulation (RC') drill programme spaced over 1km
apart is planned to confirm the lateral extents of this contact,
which will then be followed by Diamond Core drilling ('DD') to core
through the contact.
About the Virgo Project
In November 2021, Arc Minerals Limited acquired a 75% interest
in Alvis-Crest (Proprietary) Limited, the holder of two prospecting
licences (PL 135/2017 & PL 162/2017) in Botswana's Kalahari
Copper Belt ("KCB"), colloquially called the Virgo
Project/Licences. These licenses, cover an area of over 210km (2) ,
with PL 135/2017 approximately 10km south east of the large
underground Khoemacau Copper mine recently commissioned by Cupric
Canyon Capital LP.
Please see the below link to a map of the licences:
http://www.rns-pdf.londonstockexchange.com/rns/3027T_1-2021-3-24.pdf
The Virgo Licenses cover an area of over 210km(2) and lie within
(PL 165/2017) and adjacent (PL 135/2017) to the highly prospective
Central Structural Corridor and within 10km and 50km of the Zone 5
and Banana Zone copper projects respectively, known as the two
largest copper projects on the KCB.
Historically, two copper-nickel soil anomalies have already been
recorded on PL 135/2017 and PL 162/2017 and are approximately 3km
and 2.5km in strike length respectively. The largest of the two
anomalies, located on PL 135/2017, overlays an interpreted DKF-NPF
contact, while a second more intermittent anomaly may be linked to
extensional faulting around the dome edge. The large coherent
anomaly on PL 162/2017, also appears to overlay the interpreted
DKF-NPF contact on the northern limb of a syncline.
Qualified Persons
Mr Vassilios Carellas (BSc (Hons), MAusIMM) is the Chief
Operating Officer for Arc Minerals and has sufficient experience
relevant to the style of mineralisation and type of deposit under
consideration and to the activity which he is undertaking to
qualify as a Competent Person as defined under the JORC Code
(2012). Mr Carellas consents to the inclusion in this announcement
of the technical matters based on his information in the form and
context in which it appears.
Market Abuse Regulation (MAR) Disclosure
This announcement contains inside information for the purposes
of Article 7 of the Market Abuse Regulation (EU) 596/2014 as it
forms part of UK domestic law by virtue of the European Union
(Withdrawal) Act 2018 ("MAR"), and is disclosed in accordance with
the Company's obligations under Article 17 of MAR.
**S**
For more information visit www.arcminerals.com .
Contacts
Arc Minerals Ltd
Nick von Schirnding (Executive
Chairman) +44 (0) 20 7917 2942
SP Angel (Nominated Adviser
& Joint Broker)
Ewan Leggat / Adam Cowl +44 (0) 20 3470 0470
WH Ireland Limited (Joint Broker)
Harry Ansell / Katy Mitchell +44 (0) 20 7220 1666
Forward-looking Statements
This news release contains forward-looking statements that are
based on the Company's current expectations and estimates.
Forward-looking statements are frequently characterised by words
such as "plan", "expect", "project", "intend", "believe",
"anticipate", "estimate", "suggest", "indicate" and other similar
words or statements that certain events or conditions "may" or
"will" occur. Such forward-looking statements involve known and
unknown risks, uncertainties and other factors that could cause
actual events or results to differ materially from estimated or
anticipated events or results implied or expressed in such
forward-looking statements. Such factors include, among others: the
actual results of current exploration activities; conclusions of
economic evaluations; changes in project parameters as plans
continue to be refined; possible variations in ore grade or
recovery rates; accidents, labour disputes and other risks of the
mining industry; delays in obtaining governmental approvals or
financing; and fluctuations in metal prices. There may be other
factors that cause actions, events or results not to be as
anticipated, estimated or intended. Any forward-looking statement
speaks only as of the date on which it is made and, except as may
be required by applicable securities laws, the Company disclaims
any intent or obligation to update any forward-looking statement,
whether as a result of new information, future events or results or
otherwise. Forward-looking statements are not guarantees of future
performance and accordingly undue reliance should not be put on
such statements due to the inherent uncertainty therein.
Appendix A - JORC 2012 Edition: Table 1 - Section 1 Sampling
Techniques and Data
JORC Code, 2012 Edition - Table 1 Report
Section 1 Sampling Techniques and Data (Criteria in this section
apply to all succeeding sections)
Criteria JORC Code explanation Commentary
Sampling
techniques * Nature and quality of sampling (eg cut channels, * Soil sampling was carried out along traverses using
random chips, or specific specialised industry 100m sample intervals
standard measurement tools appropriate to the
minerals under investigation, such as down hole gamma
sondes, or handheld XRF instruments, etc). These * Soil samples were taken at an average depth of 10cm
examples should not be taken as limiting the broad from uncontaminated and undisturbed sites.
meaning of sampling.
* Samples were collected in the dry
* Samples were sieved on site to -180 0 m m and sealed
* Include reference to measures taken to ensure sample in transparent plastic sample envelopes
representivity and the appropriate calibration of any
measurement tools or systems used.
* Soil samples were submitted to Intertek Laboratories
in Perth, Australia for analysis.
* 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 * No drilling to date on the Virgo Project Licenses
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
recovery * Method of recording and assessing core and chip * No drilling to date on the Virgo Project Licenses
sample recoveries and results assessed.
* Measures taken to maximise sample recovery and ensure
representative nature of the samples. * No drilling to date on the Virgo Project Licenses
* Whether a relationship exists between sample recovery
and grade and whether sample bias may have occurred
due to preferential loss/gain of fine/coarse * No drilling to date on the Virgo Project Licenses
material.
============================================================
Logging
* Whether core and chip samples have been geologically * No drilling to date on the Virgo Project Licenses
and geotechnically logged to a level of detail to
support appropriate Mineral Resource estimation,
mining studies and metallurgical studies.
* No drilling to date on the Virgo Project Licenses
* Whether logging is qualitative or quantitative in
nature. Core (or costean, channel, etc) photography.
* No drilling to date on the Virgo Project Licenses
* The total length and percentage of the relevant
intersections logged.
Sub-sampling
techniques * If core, whether cut or sawn and whether quarter, * No drilling to date on the Virgo Project Licenses
and sample half or all core taken.
preparation
* If non-core, whether riffled, tube sampled, rotary * No drilling to date on the Virgo Project Licenses
split, etc and whether sampled wet or dry.
* For all sample types, the nature, quality and * Sample preparation techniques appropriate for soil
appropriateness of the sample preparation technique. sampling and analytical methods, conducted to
Intertek specified guidelines
* Quality control procedures adopted for all
sub-sampling stages to maximise representivity of
samples. * 20% QA/QC blanks, standards and/or duplicates are
inserted on site while sampling further standards are
inserted by the laboratory
* 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. * Duplicated collected, assayed and checked
* Whether sample sizes are appropriate to the grain
size of the material being sampled. * Samples collected in accordance to Intertek specified
guidelines
============================================================
Quality
of assay * The nature, quality and appropriateness of the * Partial selective digests are carried out on soil
data and assaying and laboratory procedures used and whether media to detect mineralisation under cover in areas
laboratory the technique is considered partial or total. where conventional geochemistry may be ineffective.
tests Buried ore bodies may release trace levels of metals
into groundwater which are inferred to travel
vertically in the overlying substrate and accumulate
in the top portion of the soil profile where they are
added to the background metal concentrations.
* Targeted metal ions generally reside on the surfaces
of soil particles requiring only weak selective
digest to remove them, thus producing a superior
anomaly to background contrast. This differentiates
* For geophysical tools, spectrometers, handheld XRF partial digests from stronger leaches which also
instruments, etc, the parameters used in determining extract occluded substrate metal ions that contribute
the analysis including instrument make and model, to background levels of metal, resulting in an
reading times, calibrations factors applied and their inferior anomaly contrast.
derivation, etc.
* A range of partial digests are offered designed to
* Nature of quality control procedures adopted (eg target certain element suites and specific element
standards, blanks, duplicates, external laboratory species.
checks) and whether acceptable levels of accuracy (ie
lack of bias) and precision have been established.
* TL1 uses an alkaline cyanide digest.
Detection limit for Cu & Pb is 0.02ppm and
for Ag & Zn 0.2ppm
* XRF not used
* Accuracy and precision measured by Intertek
Verification
of sampling * The verification of significant intersections by * QA/QC checks are run as normal laboratory standards,
and assaying either independent or alternative company personnel. blanks and duplicates. primary data is available in
open file reports in the form of scanned hard copy
geological logs, sections of sampled intervals and
* The use of twinned holes. assays (EZ)
* Documentation of primary data, data entry procedures, * Data entry procedures standardized in SOP, data
data verification, data storage (physical and checking and verification routine
electronic) protocols.
* Data storage on partitioned drives and backed up
* Discuss any adjustment to assay data.
============================================================
Location
of data * Accuracy and quality of surveys used to locate drill * A hand-held GPS is used for all sampling locations
points holes (collar and down-hole surveys), trenches, mine with track logs and points plotted to check for
workings and other locations used in Mineral Resource consistency and accuracy during soil sampling.
estimation.
* Specification of the grid system used.
* Quality and adequacy of topographic control.
Data spacing
and * Data spacing for reporting of Exploration Results. * Data spacing was based on geology for initial
distribution drilling reconnaissance.
* Whether the data spacing and distribution is
sufficient to establish the degree of geological and * The data spacing is appropriate for initial
grade continuity appropriate for the Mineral Resource orientation and reconnaissance soil sampling.
and Ore Reserve estimation procedure(s) and
classifications applied.
* No drilling on the Virgo Project to date
* Whether sample compositing has been applied.
============================================================
Orientation
of data * Whether the orientation of sampling achieves unbiased * Soil sampling grids were orientated with reference to
in relation sampling of possible structures and the extent to interpreted geological lithologies and structures.
to which this is known, considering the deposit type.
geological
structure
* If the relationship between the drilling orientation * No drilling to date on the Virgo Project Licenses
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. * Sample bags were tagged, logged, boxed, securely
sealed and transported to Intertek Laboratories in
Perth by registered couriers.
* No drilling to date on the Virgo Project Licenses
============================================================
Audits
or reviews * The results of any audits or reviews of sampling * All sampling procedures are documented and according
techniques and data. to industry standard practice
* No drilling to date on the Virgo Project Licenses
============= ============================================================ ===============================================================
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this
section.)
Criteria JORC Code explanation Commentary
Mineral
tenement * Type, reference name/number, location and ownership * The Botswana Project area EPL's are held by three
and land including agreements or material issues with third wholly owned (100%) locally registered companies.
tenure status parties such as joint ventures, partnerships,
overriding royalties, native title interests,
historical sites, wilderness or national park and
environmental settings. * The company expects to apply for renewal or extension
of Licences as required.
* 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 * Acknowledgment and appraisal of exploration by other * Limited previous exploration was conducted by DML,
other parties parties. Khoemacau and MOD and comprised soil sampling.
Geology
* Deposit type, geological setting and style of * The regional geological setting underlying all the
mineralisation. Licences is interpreted as Neoproterozoic meta
sediments, deformed during the Pan African Damaran
Orogen into a series of NE trending structural domes
cut by local structures. The style of mineralisation
expected comprises stratabound and structurally
controlled disseminated and vein hosted Cu/Ag
mineralisation
Drill hole
Information * A summary of all information material to the * No drilling on the Virgo Project to date
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 * No drilling on the Virgo Project to date
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.
Data
aggregation * In reporting Exploration Results, weighting averaging * No drilling on the Virgo Project to date
methods techniques, maximum and/or minimum grade truncations
(eg cutting of high grades) and cut-off grades are
usually Material and should be stated.
* No drilling on the Virgo Project to date
* Where aggregate intercepts incorporate short lengths
of high grade results and longer lengths of low grade
results, the procedure used for such aggregation * No drilling on the Virgo Project to date
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.
Relationship
between * These relationships are particularly important in the * No drilling on the Virgo Project to date
mineralisation reporting of Exploration Results.
widths and
intercept
lengths * If the geometry of the mineralisation with respect to * No drilling on the Virgo Project to date
the drill hole angle is known, its nature should be
reported.
* No drilling on the Virgo Project to date
* 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 sections (with scales) and * Appropriate maps and images demonstrating the licence
tabulations of intercepts should be included for any locations and regional setting together with the
significant discovery being reported These should continental geo-tectonic setting are included in the
include, but not be limited to a plan view of drill body of the accompanying announcement.
hole collar locations and appropriate sectional
views.
Balanced
reporting * Where comprehensive reporting of all Exploration * The accompanying document is considered to be a
Results is not practicable, representative reporting balanced and representative report.
of both low and high grades and/or widths should be
practiced to avoid misleading reporting of
Exploration Results.
Other
substantive * Other exploration data, if meaningful and material, * Reprocessing of historic Botswana Geological
exploration should be reported including (but not limited to): Institute airborne geophysics was completed over
data geological observations; geophysical survey results; portions of the Ghanzi-Chobe belt.
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.
Further
work * The nature and scale of planned further work (eg * Any further work on the Licences will be dependent
tests for lateral extensions or depth extensions or upon results from the maiden exploration drill
large-scale step-out drilling). programme about to commence.
* Diagrams clearly highlighting the areas of possible
extensions, including the main geological
interpretations and future drilling areas, provided
this information is not commercially sensitive.
=============== =============================================================== ===============================================================
Section 3 Estimation and Reporting of Mineral Resources
Not Applicable
Section 4 Estimation and Reporting of Ore Reserves
Not Applicable
Appendix B - Glossary of Technical Terms
"anomaly or anomalous" something in mineral exploration that geologists
interpret as deviating from what is standard,
normal, or expected.
The laboratory test conducted to determine
"assay" the proportion of a mineral within a rock
or other material. For copper, usually reported
as percentage which is equivalent to percentage
of the mineral (i.e. copper) per tonne of
rock.
----------------------------------------------------------
"azimuth" the "compass direction" refers to a geographic
bearing or azimuth as measured by a magnetic
compass, in true or magnetic north.
----------------------------------------------------------
"bornite" Bornite, also known as peacock ore, is a copper
sulphide mineral with the formula Cu(5) FeS(4)
.
----------------------------------------------------------
"breccia" Breccia is a rock classification, comprises
millimetre to metre-scale rock fragments cemented
together in a matrix, there are many sub-classifications
of breccias.
----------------------------------------------------------
"chalcocite" Chalcocite is a copper sulphide mineral with
the formula Cu(2) S and is an important copper
ore mineral. It is opaque and dark-gray to
black with a metallic luster.
----------------------------------------------------------
"chalcopyrite" Chalcopyrite is a copper sulphide mineral
with formula CuFeS(2) . It has a brassy to
golden yellow colour.
----------------------------------------------------------
"chargeability" Chargeability is a physical property related
to conductivity. Chargeability is used to
characterise the formation and strength of
the induced polarisation within a rock, under
the influence of an electric field, suggesting
sulphide mineralisation at depth.
----------------------------------------------------------
"covellite" Covellite is a copper sulphide mineral with
the formula CuS. This indigo blue mineral
is ubiquitous in some copper ores.
----------------------------------------------------------
"diamond drilling" A drilling method in which penetration is
achieved through abrasive cutting by rotation
of a diamond encrusted drill bit. This drilling
method enables collection of tubes of intact
rock (core) and when successful gives the
best possible quality samples for description,
sampling and analysis of an ore body or mineralised
structure.
----------------------------------------------------------
"dip" A line directed down the steepest axis of
a planar structure including a planar ore
body or zone of mineralisation. The dip has
a measurable direction and inclination from
horizontal.
----------------------------------------------------------
"geochemical" Refers to geological information using measurements
derived from chemical analysis
----------------------------------------------------------
"geophysical" Refers to geological information using unit
measurements derived from the use of magnetic
and electrical readings
----------------------------------------------------------
"geophysical techniques" include the exploration of an area by exploiting
differences in physical properties of different
rock types. Geophysical methods include seismic,
magnetic, gravity, induced polarisation and
other techniques; geophysical surveys can
be undertaken from the ground or from the
air
----------------------------------------------------------
"gossan" is an iron-bearing weathered product that
usually overlies a sulphide deposit
----------------------------------------------------------
"grab sample" are samples of rock material collected from
a small area, often just a few pieces or even
a single piece of rock "grabbed" from a face,
dump or outcrop or roughly 2-5kg. These are
common types of rock samples collected when
conducting mineral exploration. The sample
usually consists of material that is taken
to be representative of a specific type of
rock or mineralisation.
----------------------------------------------------------
"grade" The proportion of a mineral within a rock
or other material. For copper mineralisation
this is usually reported as % of copper per
tonne of rock.
----------------------------------------------------------
"g/t" grams per tonne; equivalent to parts per million
('ppm')
----------------------------------------------------------
"hematite" Hematite is the mineral form of iron(III)
oxide (Fe(2) O(3) ), one of several iron oxides.
Magnetite alteration is also typically associate
with porphyry copper systems, at or close
to the central core.
----------------------------------------------------------
"Indicated Resource" An "Indicated Mineral Resource" is that part
of a Mineral Resource for which quantity,
grade or quality, densities, shape and physical
characteristics, can be estimated with a level
of confidence sufficient to allow the appropriate
application of technical and economic parameters,
to support mine planning and evaluation of
the economic viability of the deposit. The
estimate is based on detailed and reliable
exploration and testing information gathered
through appropriate techniques from locations
such as outcrops, trenches, pits, workings
and drill holes that are spaced closely enough
for geological and grade continuity to be
reasonably assumed.
----------------------------------------------------------
"Inferred Resource" An "Inferred Mineral Resource" is that part
of a Mineral Resource for which quantity and
grade or quality can be estimated on the basis
of geological evidence and limited sampling
and reasonably assumed, but not verified,
geological and grade continuity. The estimate
is based on limited information and sampling
gathered through appropriate techniques from
locations such as outcrops, trenches, pits,
workings and drill holes.
----------------------------------------------------------
"Induced Polarisation Induced polarisation (IP) is a geophysical
Geophysics" survey used to identify the electrical chargeability
of subsurface materials, such as sulphides.
The survey involves an electric current that
is transmitted into the subsurface through
two electrodes, and voltage is monitored through
two other electrodes.
----------------------------------------------------------
"intercept" Refers to a sample or sequence of samples
taken across the entire width or an ore body
or mineralised zone. The intercept is described
by the entire thickness and the average grade
of mineralisation.
----------------------------------------------------------
"JORC Code" The Australasian Code for Reporting of Exploration
Results, Mineral Resources and Ore Reserves
('the JORC Code') is a professional code of
practice that sets minimum standards for Public
Reporting of minerals Exploration Results,
Mineral Resources and Ore Reserves .
----------------------------------------------------------
"K" The element potassium, abundance on surface
can be inferred from radiometric surveys
----------------------------------------------------------
"Magnetics" Rocks are made up of different minerals and
the magnetic properties of a rock depends
on the amount and type of iron rich minerals
it contains. Earth's magnetic field interacts
with these iron rich minerals to generate
variations in the magnetic field. Measuring
and mapping these variations allows remotely
mapping of the distribution and patterns of
magnetic rocks and, as a result, map the subsurface
geology
----------------------------------------------------------
"magnetite" Magnetite is main iron ore mineral, with chemical
formula Fe(3) O(4) . Magnetite is ferromagnetic,
and it is attracted to a magnet and can be
magnetized to become a permanent magnet itself.
----------------------------------------------------------
"massive" In a geological sense, refers to a zone of
mineralisation that is dominated by sulphide
minerals. The sulphide-mineral-rich material
can occur in centimetre-scale, metre-scale
or in tens of metres wide veins, lenses or
sheet-like bodies containing sphalerite, galena,
and / or chalcopyrite etc.
----------------------------------------------------------
"Measured Resource" A "Measured Mineral Resource" is that part
of a Mineral Resource for which quantity,
grade or quality, densities, shape, and physical
characteristics are so well established that
they can be estimated with confidence sufficient
to allow the appropriate application of technical
and economic parameters, to support production
planning and evaluation of the economic viability
of the deposit. The estimate is based on detailed
and reliable exploration, sampling and testing
information gathered through appropriate techniques
from locations such as outcrops, trenches,
pits, workings and drill holes that are spaced
closely enough to confirm both geological
and grade continuity.
----------------------------------------------------------
"Mineral Resource" A "Mineral Resource" is a concentration or
occurrence of diamonds, natural solid inorganic
material, or natural solid fossilised organic
material including base and precious metals,
coal, and industrial minerals in or on the
Earth's crust in such form and quantity and
of such a grade or quality that it has reasonable
prospects for economic extraction. The location,
quantity, grade, geological characteristics
and continuity of a Mineral Resource are known,
estimated or interpreted from specific geological
evidence and knowledge.
----------------------------------------------------------
"mineralisation" In geology, mineralisation is the deposition
of economically important metals (copper,
gold, lead, zin etc) that in some cases can
be in sufficient quantity to form mineral
ore bodies.
----------------------------------------------------------
"open pit mining" A method of extracting minerals from the earth
by excavating downwards from the surface such
that the ore is extracted in the open air
(as opposed to underground mining).
----------------------------------------------------------
"outcrop" A section of a rock formation or mineral vein
that appears at the surface of the earth.
Geologists take direct observations and samples
from outcrops, used in geologic analysis and
creating geologic maps. In situ (in place)
measurements are critical for proper analysis
of the geology and mineralisation of the area
under investigation.
----------------------------------------------------------
"polymict" A geology term, often applied to breccias
or conglomerates, which identifies the composition
as consisting of fragments of several different
rock types.
----------------------------------------------------------
"Preliminary Economic NI 43-101 defines a PEA as "a study, other
Assessment" than a pre-feasibility study or feasibility
study, which includes an economic analysis
of the potential viability of mineral resources".
----------------------------------------------------------
"Pyrrhotite" Pyrrhotite is an iron sulfide mineral with
the formula Fe(1-x)S (x = 0 to 0.2). It is
a nonstoichiometric variant of FeS, the mineral
known as troilite . Pyrrhotite is also called
magnetic pyrite
----------------------------------------------------------
"Radiometrics" The radiometric, or gamma-ray spectrometric
method is a geophysical process used to estimate
concentrations of the radioelements potassium,
uranium and thorium by measuring the gamma-rays
which the radioactive isotopes of these elements
emit during radioactive decay
----------------------------------------------------------
"sediments" Sedimentary rocks formed by the accumulation
of sediments. There are three types, Clastic,
Chemical and Organic sedimentary rocks.
----------------------------------------------------------
"sphalerite" Sphalerite is a zinc sulphide in crystalline
form but almost always contains variable iron,
with formula (Zn,Fe)S. It can have a yellowish
to honey brown or black colour.
----------------------------------------------------------
"supergene" Supergene ore processes occur near surface,
and form deposits of secondary minerals, such
as malachite, azurite, chalcocite, covellite,
digenite, etc.
----------------------------------------------------------
"surface rock chip samples" Rock chip samples approximately 2kg in size
that are typically collected from surface
outcrops exposed along rivers and mountain
ridgelines.
----------------------------------------------------------
"syncline" a trough of stratified rock in which the beds
dip toward each other from either side.
----------------------------------------------------------
"Th" The element thorium, abundance on surface
can be inferred from radiometric surveys
----------------------------------------------------------
"U" The element uranium, abundance on surface
can be inferred from radiometric surveys
----------------------------------------------------------
"veins" A vein is a sheet-like or anastomosing fracture
that has been infilled with mineral ore (chalcopyrite,
covellite etc) or mineral gangue (quartz,
calcite etc) material, within a rock. Veins
form when minerals carried by an aqueous solution
within the rock mass are deposited through
precipitation and infill or coat the fracture
faces.
----------------------------------------------------------
"volcanics" Volcanic rock such as andesite or basalt that
is formed from magma erupted from a volcano,
or hot clastic material that erupts from a
volcano and is deposited as volcaniclastic
or pyroclastics.
----------------------------------------------------------
"XRF" Instrument to determine the chemistry of a
sample by measuring the fluorescent (or secondary)
X-ray emitted from a sample when it is excited
by a primary X-ray source
----------------------------------------------------------
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
DRLLELFFLVLXBBK
(END) Dow Jones Newswires
August 15, 2022 08:43 ET (12:43 GMT)
Arc Minerals (LSE:ARCM)
Graphique Historique de l'Action
De Jan 2025 à Fév 2025
Arc Minerals (LSE:ARCM)
Graphique Historique de l'Action
De Fév 2024 à Fév 2025
