TIDMARCM
RNS Number : 1384Q
Arc Minerals Limited
25 October 2021
25 October 2021
Arc Minerals Ltd
('Arc' or the 'Company')
Assays confirm the presence of copper sulphide
mineralisation
Arc is pleased to announce that a sample from the first hole
drilled at its Cheyeza East target sent for assaying has confirmed
the presence of copper sulphide mineralisation. The first hole at
Cheyeza East intersected massive and disseminated copper sulphide
mineralisation and represents the most significant copper sulphide
discovery since the Company's drilling campaign started.
Highlights
-- Sulphide copper mineralisation encountered throughout the
entire 4.3m sample assayed, including two intervals that returned
assays of over 1% Cu
-- Confirmation of sulphide mineralised system: this combined
with airborne geophysical survey data to provide enhanced targeting
for drilling
-- Second hole drilled intersects further Copper sulphide mineralisation
-- Testing of 4km long anomaly generated from multielement
geochemical characterisation proves successful in locating sulphide
copper mineralisation
Based on both visual inspection of the core drilled and X-Ray
Flourescence ('XRF') analyses, selected intervals were sent to SGS
Inspection Services, Kalalushi Laboratory in Zambia for assay. This
batch of assays confirms mineralisation throughout the entire 4.3m
sample assayed including up to 4.3m @ 0.6% Cu (including 1.8m @
0.8% Cu or 3.3m @ 0.7%) and two intervals of over 1% Cu.
Nick von Schirnding, Executive Chairman of Arc Minerals,
commented:
"This is the first result from what will be an extensive
drilling programme going forward to determine the scale of massive
sulphide mineralisation at Cheyeza East and provides support for a
large mineralised system at play.
This is the first time that the Arc team has targeted the
anomalies generated by multielement geochemical characterisation
study carried out last year, targeting Muswema and Cheyeza East as
the first and second priorities respectively with Muswema still to
be drilled. The immediate success in intersecting sulphide copper
mineralisation is extremely encouraging given the number and
re-ranking of targets that have arisen as a result of this
study.
With the high resolution airborne geophysical data, drill
targeting will be further enhanced, and I envisage further success
with regards to our ambition of discovering a significant copper
sulphide resource."
Background
Cheyeza East
The first hole drilled at Cheyeza this year is at the
south-easterly end of a 4km x 1km Cu:Sc anomaly. This hole was
designed to test this interpreted NW-SE feature, identified by the
multielement geochemical characterisation study, which is
discordant with the expected trend of the stratigraphy and is
additionally characterised by a relatively high Nb:Sc.
Located between 500m to 1,000m north-west of last years oxide
drilling campaign at Cheyeza East, it is the first time that any
drilling has ever been carried out in this part of the license by
the Company and likewise the first intersection of copper bearing
sulphides in this NW-SE trending feature.
A second hole drilled further to the north west has similarly
intersected similar lithologies and based on both visual inspection
of the core drilled and XRF analyses confirms further copper
sulphide mineralisation.
Data from the high resolution airborne programme will be used to
further enhance the drill targeting at Cheyeza as well as the other
target areas identified by the multielement geochemical
characterisation study.
Figure 1. Testing of 4km long anomaly generated from
multielement geochemical characterisation
Please see link below:
http://s2.q4cdn.com/256050873/files/doc_downloads/2021/10/Cu-Sc-anomaly.png
Table 1. Cheyeza East Sulphide Laboratory Assay Results
BHID From To Length Cu (%)
CHDDE72 275.80 280.10 4.30 0.59
--------- ------- ------- ------- -------
includes from
275.80 1.80 0.83
--------- ---------------- ------- -------
includes from
275.80 3.30 0.68
--------- ---------------- ------- -------
Notes:
1) Reported intervals are downhole widths.
2) Reported intervals are calculated for zones assaying >
0.2% Cu and more than 3m in length.
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.
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.
----------------------------------------------------------
"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.
----------------------------------------------------------
"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
----------------------------------------------------------
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