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Wallal Project, Paterson Region, Western Australia - Technical Overview
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The company's now ready to pull out the
wand of truth being the drill rig and
test these geohysical targets. We're
looking forward to see what comes out of
the drill hole. Uh my name is uh Dr.
Jason Meyers. Um I'm a director of
resource potentials. Um we're a
consulting uh firm based in Perth,
Western Australia. Uh we provide
primarily high-end geohysical data
processing, modeling and interpretation.
And we also love to integrate geology
and geocchemistry to help our clients
with their targeting. We've been
approached by first development to
assist them in their exploration uh in
the walal ba embayment or basin um in
the pillar region of uh western
Australia. uh FDR are exploring for an
analog to the Great Land Gold um Javier
gold copper deposit um which was
discovered in the uh 1990s around 1993
but uh has been more recently drilled
over the last two years and has turned
out to be a worldclass
um gold deposit that that is quickly
being developed. Um
um the walal bayment is runs in the same
uh neoprotoz geology extending from
havron and telur. Uh undercover the
walal bayment itself is is a deep
sedimentary trough um primarily filled
with ferorizoic sediments which have
been previously explored for oil and
gas. Um some shallow holes have been
drilled in the basin and on the flank of
the basin is a shelf uh still covered by
sediments but with the same bedrock
geology that hosts Havon and Teler uh
sitting undercover. Um there have been
very few drill holes in that part of the
world but it is closer to the main
northern highway and the coast in WA. uh
that um target area that FDR have first
development is uh primarily a magnetic
anomaly very similar to the anomaly uh
that led to the discovery of Havron. Uh
there's two other uh magnetic targets in
the same project area. One of them is
quite deep. We know that now from uh
reprocessing and interpretation of
seismic reflection data. Um but we know
that the cover sitting over this um the
strongest magnetic anomaly in FDR's
ground sits at about 600 meters of
cover. Uh it's a little bit deeper than
Havron which is at about um 450 on
average, 400 in the shallowest and
pushing 500 in the deeper part. Um
because FDR is exploring in a very
deeply buried um environment. This is
what we call you know deep exploration
or deep undercover exploration. have to
rely on as many technologies as possible
before testing targets with drilling.
So, we've gone through existing and open
file magnetic and gravity data sets and
and really pushed them to the limit to
pull as much information as we could out
of them and assess depth and geometry of
the source of these anomalies. Uh we've
reprocessed seismic data as my colleague
Nigel will talk about. we carried out
passive seismic and there's been some
recent reconnaissance activity um and
heritage uh clearing.
So, so the work that's been going in the
back on the background for the last six
months or more um the company's now
ready to pull out the wand of truth with
being the drill rig and and test these
geohysical targets uh that have this
similar geological setting.
>> Yeah. So just to give you a quick
rundown of resource potentials
involvement in this project. Um we
started an initial desktop study in in
quarter one of two 2021. We quickly
identified that there were some key
magnetic bullseye anomalies with similar
characteristics uh to Javieron. You know
similar shape similar amplitude
and uh maybe a little bit broader
possibly sitting a little bit deeper
below cover. similar appearance to
Javier on but in a similar structural
position to to Wu. So we're quickly
excited by one one target in particular
which we've called the main eastern
magnetic anomaly. You know based on the
the local and the regional geology we're
expecting this these magnetic sources to
sit uh several hundred meters below
phenoroic sedimentary cover sequence but
hosted within a prospective protozoic
bedrock geology. As part of this initial
study, it was just imaging processing
modeling and unconstrained 3D inversion
modeling to to give a rough idea of the
the depth below surface. So based on
that initial study, you know, for this
main eastern magnetic anomaly predicting
maybe 700 uh 600 to 700 meters below
surface, but really it's it's just a
rough guess at this stage and we needed
to do further study to try and constrain
uh the the depth to the target and give
a more realistic um drill proposal.
Okay. So a follow-up study that resource
potentials has carried out involved
making the most of historical
exploration data namely 2D reflection
seismic and uh acquiring new data over
the top of the the magnetic targets in
particular the main eastern magnetic
target in order to constrain uh updated
inversion modeling magnetic inversion
modeling. So to start with the the 2D
reflection seismic, we worked with uh
the WA government geological survey
to obtain that data uh convert it from a
tape format and and got it sent to bells
size on the east coast of Aussie to
reprocess the data and and uh provide us
with some uh depth converted sections.
So converting seismic data from time
domain into to depth domain and so that
we could interpret uh stratographic
layering within the cover sequence and
interpret the the depth to the protozoic
basement. Historical 2D reflection
seismic didn't cover the main magnetic
eastern target. And so we proposed and
uh carried out a lowcost and effective
non- ground disturbing uh passive
seismic method to estimate the thickness
of cover sediments.
So, so this uh was carried out by Atlas
Geo Physics and three survey lines
across the across key targets and
overlapping with the 2D reflection
seismic uh were carried out uh late last
year. So the aim of this data is to to
identify uh reflectors deep reflectors
within the cover sequence and relate
these to reflectors that we're seeing in
the 2D reflection seismic to integrate
these data and then predict uh predict
the depth to the basement in the area of
the the key magnetic targets. Okay. So
we're we're in later 2021 now. We've
we've reprocessed the 2D reflection
seismic. We've acquired and processed
the passive seismic and integrated these
data in 3D workspaces. Next step was to
carry out a constrained magnetic 3D
inversion modeling. You know, so
constraining the model the magnetic
model forcing that model to sit below
the interpreted uh uh basement top of
basement and uh through doing a
constrained inversion. And now we've now
got a much better understanding of the
depth of the target and we can see some
variation in the shape. You know, it's
likely uh the magnetic source is likely
composed of two loes
and uh that will use that information in
drill targeting and uh the depth to the
top of the source magnetic source is
likely around 800 m. Uh so a little bit
deeper than the initial uh unconstrained
inversion. So, so we've now been able to
um very uh cheaply and um you know with
with minimal work on the ground been
able to provide a much uh better
constrained target for drill targeting
and uh that's that's where I sort of
handed over my work and the the rest geo
team started to work with uh first
development to to assist with uh
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