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GD offers a wide range of services
that cover all aspects of mineral exploration, project
assessment and project management. These are based
on genuine industry experience backed by industry
standard and leading edge data processing and visualisation
tools.
Project and target generation are at the core of GD’s
integrated services based on recognised industry expertise
and experience for a wide range of commodity types
and global terranes (see Commodity
section). These are integrated with specialist skills
in regional terrane assessment, geophysical, geochemical
and structural analysis techniques.
Generation of high-quality
targets requires a multi-skilled team approach. All
GD members are highly experienced in project and target
generation using multi-layered datasets linked to
advanced GIS and 3D visualisation capabilities. GD
provides clients with the ability to accelerate their
project and target generation leading to more time
and cost-effective target testing and turn-over.
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GD offers its clients a comprehensive project management
service as a follow-up to its project and target generation
capabilities. GD can design, implement and organise
all types of exploration programs, ranging from large
regional surveys to grid-based drilling.
Through comprehensive networking and industry experience,
GD can provide integrated exploration teams of field
and technical personnel. In combination with GD's
project and target generation skills, this provides
a mechanism to create maximum value and leverage from
exploration funding.
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GD has significant geophysical expertise and capabilities
backed by industry standard and leading edge software.
GD has specialist capabilities related to the acquisition,
quality control and 2D/3D inversion modeling of IP/Resistivity
data and 3D inversion modeling of magnetic and EM
data.
A key aspect is the ability to
integrate specialist geophysical services in team-based
target generation and assessment. GD routinely provides
geophysical services and support to both major and
junior mining companies, ranging in scale from terrane
assessment to near-mine.
Magnetics
Magnetics can provide
direct targeting of mineralisation styles that
have a magnetite-pyrrhotite association and can
also be a highly cost-effective mapping and terrane
assessment tool, particularly in covered regions.
GD has expertise in performing predictive modeling
to ensure optimum survey design, data and image
processing, and interpretive modeling including
specialist 3D inversion.
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EM
Many orebodies exhibit
intrinsic conductivities with or without an associated
magnetic response and are amenable to detection
using EM methods. Significant improvements in
airborne and ground EM interpretation methods
and software in recent times enables sophisticated
2D and 3D modelling, with export of models to
advanced GIS/visualisation packages. These enhanced
capabilities allow improved detection of basement
features under conductive overburden, and are
also very effective in reassessment and targeting
using historical surveys. Back
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Induced Polarisation
(IP)
IP and resistivity is an excellent tool to detect
and map disseminated sulphide ores, native copper
ores and disseminated sulphide-bearing alteration
systems. Major advances have been made in the
interpretation and visualisation of IP/Resistivity
data over recent years. GD has industry leading
capabilities in survey design and acquisition
techniques, quality control (including quantitative
EM coupling assessment), and interpretation using
specialist 2D and 3D inversion modeling techniques.
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Gravity
Gravity surveying is a rapid and cost-effective
tool for regional interpretation and for direct
orebody detection. Integration of gravity data
with magnetic and electrical methods provides
significant enhancement to regional interpretation
and drill targeting. Routine modelling for depth
of cover and significant basement-sourced bodies
is possible using density information from both
borehole logs and sample determinations. Back
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Remote sensing
Remote sensing data such as Landsat, Spot or Aster
are effective tools for target generation via
direct detection of alteration for a range of
deposit types. It can also be used for geological
mapping and structural analysis from regional
terrane assessment to prospect scale. Critical
regolith landform information can also be derived
to assist in the planing and interpretation of
geochemical surveys. GD has extensive experience
in the processing and interpretation of remote
sensing data. Back
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Total Field Magnetometric
Resistivity (TFMMR)
TFMMR is a novel technique which can provide a
cost-effective way of mapping features which have
only a moderate resistivity contrast with their
host at very high spatial resolution (e.g. Au
bearing shear zones under cover). High-resolution
GPS-located ground magnetics data are also acquired
in conjunction with TFMMR. This simultaneous acquisition
provides significant cost-benefits and improved
interpretation due to the complimentary nature
of the datasets. GD members have been involved
in research and development work for TFMMR and
can provide a unique perspective on the technique.
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