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| Share Name | Share Symbol | Market | Type | Share ISIN | Share Description |
|---|---|---|---|---|---|
| Asiamet Resources Limited | LSE:ARS | London | Ordinary Share | BM04521V1038 | COM SHS USD0.01 (DI) |
| Price Change | % Change | Share Price | Bid Price | Offer Price | High Price | Low Price | Open Price | Shares Traded | Last Trade | |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.075 | 9.68% | 0.85 | 0.80 | 0.90 | 0.85 | 0.775 | 0.775 | 5,878,414 | 12:45:55 |
| Industry Sector | Turnover | Profit | EPS - Basic | PE Ratio | Market Cap |
|---|---|---|---|---|---|
| Miscellaneous Metal Ores,nec | 0 | -6.93M | -0.0027 | -3.15 | 22.05M |
TIDMARS
RNS Number : 1600I
Asiamet Resources Limited
19 March 2018
For Immediate Release London AIM 19 March 2018 Symbol: ARS
Asiamet BKZ Resource Drilling Continues to Intersect High Grade Mineralisation
Asiamet Resources Limited ("ARS" or the "Company") is pleased to report that ongoing Resource delineation drilling at the BKZ prospect ("BKZ") continues to intersect high-grade polymetallic and copper - silver mineralisation as predicted. The BKZ prospect is located in Central Kalimantan (Indonesia) on the Kalimantan Surya Kencana ("KSK") 6(th) Generation Contract of Work ("CoW"), less than 800 metres from the BKM copper project which is at BFS stage.
Highlights of recent results include:
-- Broad intervals of high-grade massive sulphide mineralisation in the upper polymetallic zone, including 17.0m at 11.4% Zinc, 6.0% Lead and 383g/t Silver and 30.0m at 6.0% Zinc, 4.0% Lead and 62g/t Silver
-- Broad interval of high-grade copper-silver mineralisation in the lower zone, including 29.5m at 1.86% Cu and 50g/t Ag
-- Assay results confirm up to 30.7% zinc, 17.7% lead, 158g/t silver over 1-metre sample intervals in the polymetallic zone and up to 6.6% copper over 1-metre sample intervals in the interpreted "Feeder Structure" in the Lower Zone
-- A Maiden Resource estimate for both mineralised domains at the BKZ deposit is being prepared by Hackman & Associates Pty Ltd and is expected to be completed in May 2018
Highlights of the latest batch of drill results received include:
BKZ33700-06 17.0m at 11.4% Zn, 6.0% Pb, 383g/t Ag, 0.11% Cu and 0.16g/t Au (from 34.0m)
Including 5.0m at 21.4% Zn, 10.7% Pb, 137g/t Ag, 0.14% Cu and 0.29g/t Au (from 45.0m)
Final 1.0m assayed 25.3% Zn, 7.2% Pb, 130g/t Ag, 0.18% Cu and 0.26g/t Au (from 71.0m)
BKZ33700-05 30.0m at 6.0% Zn, 4.0% Pb, 62g/t Ag, 0.19% Cu and 0.79g/t Au (from 4.0m)
Including 2.0m at 10.1% Zn, 9.3% Pb, 177g/t Ag, 0.52% Cu and 0.94g/t Au (from 4.0m)
Including 13.0m at 8.2% Zn, 5.5% Pb, 56g/t Ag, 0.19% Cu and 0.49g/t Au (from 18.0m)
43.0m at 4.4% Zn, 0.9% Pb, 16g/t Ag, 0.24% Cu and 0.40g/t Au (from 39.0m)
Including 7.0m at 8.2% Zn, 2.7% Pb, 24g/t Ag, 0.08% Cu and 0.60g/t Au (from 45.0m)
Including 6.0m at 10.6% Zn, 2.0% Pb, 45g/t Ag, 0.98% Cu and 0.40g/t Au (from 56.0m)
BKZ33600-04 29.5m at 1.86% Cu, 50g/t Ag, 0.15g/t Au (from 58.0m)
Including 18.0m at 2.64% Cu, 24g/t Ag, 0.15g/t Au (from 63.0m)
BKZ33600-05 9.5m at 5.1% Zn, 0.75% Pb, 18g/t Ag, 0.12% Cu and 0.10g/t Au (from 36.5m)
25.85m at 1.36% Cu, 2.7% Pb, 20g/t Ag, 0.15g/t Au (from 75.15m)
Including 8.0m at 1.70% Cu, 12g/t Ag, 0.16g/t Au (from 82.0m)
Including 3.0m at 3.40% Cu, 6.0% Pb, 57g/t Ag, 0.21g/t Au (from 94.0m)
The Maiden Resource drilling programme at BKZ continues to provide confidence in the strike, dip and internal continuity of the high-grade polymetallic and underlying copper-silver mineralisation. A total 3,416 metres in thirty-six holes were completed for the first of a two-phase drilling campaign at BKZ, where mineralisation continues to define the dimensions of the two mineralised domains at BKZ, the footprint of which still remains open in several directions. The analysis from the final five drill holes is expected in March 2018, and the Company is on track to report a Maiden Resource estimate for the BKZ deposit in May 2018, which is being carried out by Independent consulting geologist Duncan Hackman of Hackman & Associates Pty Ltd.
Peter Bird, Asiamet's Chief Executive Officer commented:
"The excellent results generated from our drilling programmes at both the BKM and BKZ projects over the past three years clearly demonstrate the intrinsic value of Asiamet's project portfolio. This latest batch of results from Resource delineation drilling at BKZ demonstrate excellent internal continuity of both the upper high-grade polymetallic and the underlying copper-silver mineralisation and increase the Company's confidence in defining an initial high value polymetallic deposit with potential to leverage off the proposed BKM mining infrastructure. With the recent financing completed we look forward to reporting further results from the BKZ infill drilling programme and the initial Resource in May, together with further results from the final stages of the BKM bankable feasibility study and first results from our current programme of drilling and metallurgical testwork underway at the Beutong porphyry Cu-Au deposit."
Drill Hole Summary
The fifth hole on section line BKZ33700 was drilled to confirm continuity of mineralisation in BKM33700-03 (101.3m End of Hole "EOH"), which intersected 30.0m at 8.3% zinc, 3.3% lead, 39g/t silver and 0.51g/t gold from 14m (refer ARS Press Release October 18, 2017). BKZ33700-05 (94.2m EOH) was drilled eastward and intersected a broad zone of moderate to high-grade polymetallic mineralisation from 4.0m depth comprising quartz-sulphide veins and massive sulphides containing sphalerite (zinc), galena (lead), chalcopyrite (copper) and pyrite. The sixth hole on section line BKZ33700 is a scissor hole to BKM33700-02 (113.9m EOH), drilled to confirm continuity of high-grade mineralisation that included 39m at 7.3% zinc, 2.3% lead, 33g/t silver and 0.33g/t gold from 41m (refer ARS Press Releases October 3, 2017). BKZ33700-06 (72.0m EOH) was drilled eastward and intersected a broad zone of moderate to high-grade polymetallic mineralisation from 34.0m depth comprising quartz-sulphide veins and massive sulphides containing sphalerite (zinc), galena (lead), chalcopyrite (copper) and pyrite. This hole intersected some of the highest grade polymetallic assays seen to date, with up to 30.7% zinc, 17.7% lead and 158g/t silver in a 1-metre sample interval.
The fourth hole on section line BKZ33600 was drilled parallel to BKZ33600-02 (89.6m EOH), which intersected a broad zone of copper-silver mineralisation assaying 29.3m at 1.52% copper, 0.15g/t gold and 40.1g/t silver from 59.0m and includes 19.0m at 1.97% copper, 0.14g/t gold and 19.0g/t silver from 61.0m depth (refer ARS Press Release November 13, 2017). BKZ33600-04 (92.1m EOH) was targeting the area below the hematite rich zone, but unfortunately the rig was unable to breach this intensely silicified rock. However, BKZ33600-04 did intersect higher grade copper-silver mineralisation than was reported in BKZ33600-02, the interpreted feeder zone comprising a dense stockwork of quartz-sulphide and sulphide veins containing bornite, chalcopyrite and pyrite. Individual 1-metre sample intervals assayed up to 6.6% copper within the higher grade interval from 63m to 81m depth. The fifth hole BKZ33600-05 (115.8m EOH) was also drilled east, but at a shallower angle. This hole also intersected the interpreted feeder zone, comprising a dense stockwork of quartz-sulphide and sulphide veins containing bornite, chalcopyrite, galena and pyrite. This hole also terminated in the intensely silicified and hematite altered breccia, with assays confirming gold-silver mineralisation.
The drill hole location plan map and a table of full assay results are provided in Figures 1 and Table 1 respectively.
Qualified Person
Data disclosed in this press release have been reviewed and verified by ARS's qualified person, Stephen Hughes, P. Geo, Vice President Exploration of the Company and a Qualified Person within the meaning of NI 43-101 and for the purposes of the AIM Rules.
ON BEHALF OF THE BOARD OF DIRECTORS
Peter Bird, Deputy Chairman and CEO
For further information, please contact:
-Ends-
Peter Bird
Deputy Chairman and CEO, Asiamet Resources Limited
Telephone: +61 3 8644 1300
Email: peter.bird@asiametresources.com
Tony Manini
Executive Chairman, Asiamet Resources Limited
Telephone: +61 3 8644 1300
Email: tony.manini@asiametresources.com
FlowComms Limited
Sasha Sethi
Telephone: +44 (0) 7891 677 441
Email: Sasha@flowcomms.com
Asiamet Resources Nominated Adviser
RFC Ambrian Limited
Andrew Thomson / Stephen Allen
Telephone: +61 8 9480 2500
Email: Andrew.Thomson@rfcambrian.com / Stephen.Allen@rfcambrian.com
Liberum
Neil Elliot, Clayton Bush, Kane Collings
Telephone: +44 20 3100 2222
Email: Neil.Elliot@Liberum.com
Optiva Securities Limited
Christian Dennis
Telephone: +44 20 3137 1903
Email: Christian.Dennis@optivasecurities.com
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.
This announcement contains inside information as stipulated under the Market Abuse Regulations (EU) no. 596/2014 ("MAR").
Table 1: Recent drill intercepts.
Hot Features
Premium
HOLE From To Length Zinc Lead Silver Gold Copper
ID (%) (%) (g/t) (g/t) (%)
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33700-05 4.00 34.00 30.00 6.01 4.05 62.17 0.79 0.19
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 4.00 6.00 2.00 10.15 9.29 176.95 0.94 0.52
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 18.00 31.00 13.00 8.18 5.48 55.69 0.49 0.19
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33700-05 39.00 82.00 43.00 4.40 0.86 15.71 0.40 0.24
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 45.00 52.00 7.00 8.25 2.69 24.27 0.60 0.08
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 56.00 62.00 6.00 10.61 2.02 45.20 0.40 0.98
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33700-06 34.00 51.00 17.00 11.40 6.03 383.15 0.16 0.11
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 45.00 50.00 5.00 21.40 10.75 136.66 0.29 0.14
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33700-06 71.00 72.00 1.00 25.30 7.17 130.00 0.26 0.18
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33600-04 33.60 40.00 6.40 1.96 0.20 6.40 - -
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33600-04 58.00 87.50 29.50 - - 50.36 0.15 1.86
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 63.00 81.00 18.00 - - 24.37 0.15 2.64
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33600-04 87.50 92.10 4.60 - - 121.05 0.21 -
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33600-05 36.50 46.00 9.50 5.13 0.75 18.03 0.10 0.12
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33600-05 75.15 101.00 25.85 - 2.66 19.88 0.15 1.36
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 82.00 90.00 8.00 - 0.90 12.34 0.16 1.70
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Including 94.00 97.00 3.00 - 5.98 56.93 0.21 3.40
------------- ------- ------- --------- ------- ------- --------- -------- ---------
BKZ33600-05 101.00 115.80 14.80 - - 36.99 0.35 -
------------- ------- ------- --------- ------- ------- --------- -------- ---------
Notes: Grade intercepts are calculated as a weighted average grade >=1.0% Zinc (uncut) for Polymetallic Zone. Grade intercepts are calculated as a weighted average grade >=0.2% Copper (uncut) for the Copper-Silver Zone. True widths are interpreted to be between 80-100% of the reported lengths, unless otherwise stated. Orientation of the polymetallic mineralised domain is interpreted to have an azimuth of 340 degrees and a dip of -25 degrees to the northeast. Orientation of the copper mineralised domain is interpreted to have an azimuth of 340 degrees, a dip of -25 degrees to the northeast and plunging south-southeast.
Figure 1: Location map showing strong zinc in soil geochemistry over the BK district with prospects & drill collars. To view the image, please click on the link: http://www.asiametresources.com/i/maps/Fig1-mar192018-NR.png
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
"assay" to determine 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 Cu5FeS4.
---------------------------- -----------------------------------------------
"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 Cu2S
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 CuFeS2.
It has a brassy to golden
yellow colour.
---------------------------- -----------------------------------------------
"channel sample" Samples collected across a
mineralised rock exposure.
The channel is typically orientated
such that samples are collected
perpendicular to the mineralised
structure, if possible.
---------------------------- -----------------------------------------------
"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.
---------------------------- -----------------------------------------------
"CIM" The reporting standard adopted
for the reporting of the Mineral
Resources is that defined
by the terms and definitions
given in the terminology,
definitions and guidelines
given in the Canadian Institute
of Mining, Metallurgy and
Petroleum (CIM) Standards
on Mineral Resources and Mineral
Reserves (December 2005) as
required by NI 43-101. The
CIM Code is an internationally
recognised reporting code
as defined by the Combined
Reserves International Reporting
Standards Committee.
---------------------------- -----------------------------------------------
"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.
---------------------------- -----------------------------------------------
"digenite" Digenite is a copper sulfide
mineral with formula Cu9S5.
Digenite is a black to dark
blue opaque mineral.
---------------------------- -----------------------------------------------
"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.
---------------------------- -----------------------------------------------
"galena" Galena is the natural mineral
form of lead (II) sulphide,
with formula PbS. It is the
most important ore of lead
and an important source of
silver. It has a silver colour.
---------------------------- -----------------------------------------------
"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).
---------------------------- -----------------------------------------------
"g/t" grams per tonne; equivalent
to parts per million ('ppm')
---------------------------- -----------------------------------------------
"hematite" Hematite is the mineral form
of iron(III) oxide (Fe2O3),
one of several iron oxides.
Magnetite alteration is also
typically associate with porphyry
copper systems, at or close
to the central core.
---------------------------- -----------------------------------------------
"hypogene" Hypogene ore processes occur
deep below the earth's surface,
and form deposits of primary
minerals, such as chalcopyrite
and bornite.
---------------------------- -----------------------------------------------
"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)
Geophysics" is a geophysical 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.
---------------------------- -----------------------------------------------
"lbs" Pounds (measure of weight)
---------------------------- -----------------------------------------------
"Mlbs" Million pounds (measure of
weight)
---------------------------- -----------------------------------------------
"magnetite" Magnetite is main iron ore
mineral, with chemical formula
Fe3O4. Magnetite is ferromagnetic,
and it is attracted to a magnet
and can be magnetised 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.
---------------------------- -----------------------------------------------
"polymetallic" three or more metals that
may occur in magmatic, volcanogenic,
or hydrothermal environments;
common base and precious metals
include copper, lead, zinc,
silver and gold.
---------------------------- -----------------------------------------------
"polymict" A geology term, often applied
to breccias or conglomerates,
which identifies the composition
as consisting of fragments
of several different rock
types.
---------------------------- -----------------------------------------------
"porphyry" Porphyry copper deposits are
copper +- gold +- molybdenum
orebodies that are formed
from hydrothermal fluids that
originate from a voluminous
magma chamber below the deposit
itself.
---------------------------- -----------------------------------------------
"Preliminary Economic NI 43-101 defines a PEA as
Assessment" "a study, other than a pre-feasibility
study or feasibility study,
which includes an economic
analysis of the potential
viability of mineral Resources".
---------------------------- -----------------------------------------------
"propylitic alteration" Propylitic alteration is the
chemical alteration of minerals
within a rock, caused by hydrothermal
fluids. This style of alteration
typically results in epidote-chlorite+-albite
alteration and veining or
fracture filling, commonly
altering biotite or amphibole
minerals within the rock groundmass.
It typically occurs along
with pyrite.
---------------------------- -----------------------------------------------
"sediments" Sedimentary rocks formed by
the accumulation of sediments.
There are three types, Clastic,
Chemical and Organic sedimentary
rocks.
---------------------------- -----------------------------------------------
"sequential assays" Sequential copper analysis
is a technique to semi-quantitatively
define the zonations associated
with some copper deposits.
The method is based on the
partial dissolution behaviour
displayed by the prevalent
copper minerals to solutions
containing sulphuric acid
and sodium cyanide. Results
from sequential analyses can
theoretically determine the
amounts of leachable oxide
minerals, leachable secondary
sulphide minerals, and primary
copper minerals, respectively.
---------------------------- -----------------------------------------------
"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.
---------------------------- -----------------------------------------------
"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.
---------------------------- -----------------------------------------------
This information is provided by RNS
The company news service from the London Stock Exchange
END
DRLLLFSFVDIALIT
(END) Dow Jones Newswires
March 19, 2018 08:49 ET (12:49 GMT)
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