TIDMKAV
RNS Number : 1464B
Kavango Resources PLC
05 June 2019
PRESS RELEASE
5 June 2019
KAVANGO RESOURCES PLC
("Kavango" or "the Company")
PHASE 2 AEM SURVEY: DATA PROCESSING RESULTS
Kavango Resources plc (LSE: KAV), the exploration group listed
on the Standard List segment of the main market of the London Stock
Exchange and targeting the discovery of world class mineral
deposits in Botswana, is pleased to announce that processing of the
data from Phase 2 of the airborne electromagnetic (AEM) survey
carried out by SkyTEM over the northern section of the Company's
prospecting licences that cover much of the Kalahari Suture Zone
(KSZ) structure in southwest Botswana has now been completed.
HIGHLIGHTS:
-- The results of the data processing and modelling have shown
that SkyTEM's new low frequency AEM system has been able to
penetrate to an average depth just under 400m, below the conductive
cover of Kalahari sand and Karoo sediments.
-- The processing was carried out by the Danish based Aarhus
Geophysics Ltd using state of the art 3D modelling software. The
geological modelling allows Kavango's technical team to identify
lithological units, structures, zones of conductivity and potential
ore bodies on a line by line basis.
-- Each of the lines flown (500m apart) can be viewed as a
vertical section with depth penetration down to nearly 700m in some
cases. It also provides for horizontal "slicing" at any depth. This
enables Kavango's geologists to move from line to line, at any
depth, to view the conductive targets and their associated host
lithologies.
-- The model identifies a number of conductors closely
associated with gabbroic*** intrusives and faults.
-- The added depth penetration of the new SkyTEM 12.5Hz system
combined with the advanced data processing undertaken by Aarhus
Geophysics has produced results greatly superior to those from the
Phase 1 AEM survey.
-- One of the advantages of the new processing techniques is its
ability to discriminate between false (artefact) conductors created
by the software and "real" conductors that are generated by the
geology.
-- To date 45 conductive anomalies have been identified from the
Phase 2 survey. Of these, 24 conductors are detected on single
flight lines. The remaining conductors are traceable over several
lines. The longest conductor is 4.5km long.
-- The most compelling conductors will now be surveyed by ground
based resistivity techniques (CSAMT**) together with detailed soil
geochemistry. The immediate objective is to identify the best 3 or
4 targets for drilling, to be carried out as soon as ground follow
up is completed.
Michael Foster, Chief Executive Officer of Kavango Resources,
commented:
"The combination of SkyTEM's new high resolution 12.5Hz EM
surveying system together with the advanced data processing
provided by Aarhus Geophysics represents a major breakthrough in
Kavango's exploration for massive sulphide orebodies lying below
Kalahari and Karoo cover in the northern part of the KSZ. The
ability of our geologists to view the rocks using 3D models
provides them with exploration tools that will allow for the
identification of mineralized zones which have remained completely
hidden until now.
The data processing has identified numerous conductors of
interest, the longest of which is 4.5km long. The most compelling
conductors will now be surveyed by ground based resistivity
techniques together with detailed soil geochemistry. The immediate
objective is to identify the best 3 or 4 targets for drilling, to
be carried out as soon as ground follow up is completed."
Images from the data derived from the Phase 2 survey and
processed by Aarhus Geophysics can be viewed on the Company's
website (see below).
Further information in respect of the Company and its business
interests is provided on the Company's website at
www.kavangoresources.com and on Twitter at #KAV.
For further information please contact:
Michael Foster +44 20 3651 5705
mfoster@kavangoresources.com
Company's website at www.kavangoresources.com
Twitter at #KAV
City & Westminster Corporate Finance LLP +44 20 7917 6824
Nicola Baldwin
SI Capital Limited (Broker) +44 1483 41 3500
Nick Emerson
Notes for Editors:
Kavango's 100% subsidiary in Botswana, Kavango Minerals (Pty)
Ltd, is the holder of 15 prospecting licences covering 9,231 km(2)
of ground, including most of the 450km long KSZ magnetic anomaly in
the southwest of the country along which Kavango is exploring for
Cu-Ni-PGE rich sulphide orebodies. This large area, which is
entirely covered by Cretaceous and post-Cretaceous Kalahari
sediments, has not previously been explored using modern
techniques.
The area covered by Kavango's KSZ licences displays a geological
setting with distinct similarities to that hosting the World Class
Norilsk Ni-Cu-PGE orebodies in Siberia.
Exploration Model:
Kavango's exploration model is based upon the search for
magmatic massive sulphide orebodies buried beneath up to 200m of
overburden. The identification of drill targets follows a carefully
constructed exploration program specifically developed by the
Company for exploration in areas covered by Kalahari and Karoo
sediments and sands.
The exploration program is initiated by identifying the location
of magmatic intrusive rocks from an analysis of the regional
magnetic surveys published by the Botswana Government. This is
followed by an airborne electro-magnetic survey (AEM) carried out
over the magnetic anomalies that have signatures indicating the
presence of intrusive rocks at depth. By using the latest
generation of low frequency helicopter-borne EM surveying,
conductors lying below the Kalahari/Karoo cover can be identified
for further investigation. These conductors can be tested on
surface by very high sensitivity soil sampling*, which can detect
metal ions transported from buried, metal rich massive sulphide
deposits associated with the emplacement of magmatic intrusive
rocks.
Kavango uses a ground based geophysical technique known as
Controlled Source Audio frequency Magneto Tellurics (CSAMT)** to
identify the exact location of the conductors. The shape,
orientation and depth of the conductors will determine if the
conductor should be drilled. The presence of a metal in soil
anomaly is also used to prioritise the conductors.
The next phase of the exploration involves the drilling of the
conductor to determine the presence of sulphide mineralisation and
its metal component (discovery). This is followed by the evaluation
of the discovery, which will determine whether the deposit is large
enough and rich enough to make an economically viable mine
(feasibility).
*Kavango geologists have pioneered a high resolution soil
sampling technique to detect ultra-fine metal particles which have
been transported in solution from considerable depths of burial to
the surface by capillary action and transpiration. Evaporation
leaves the metal ions as accumulations within a surface "duricrust"
which is then sampled and analysed. Zinc, which is the most mobile
of the base metal elements (i.e. goes into solution easily) acts as
a pathfinder to mineralization at depth.
**Massive sulphide (base metal) deposits can be detected by
CSAMT because they conduct electricity easily (conductors) as
opposed to silicate wall rocks (resistive).
(***) Gabbro is a dense mafic intrusive rock, usually formed in
an oceanic crust environment, when molten mass cools and
crystallises at depth, forming a coarse grained, dark coloured
rock, similar in its chemical composition to basalt.
****************************ENDS**************************************
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END
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