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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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In early 2003 GD formed
an alliance with Fractal Technologies (Perth) to aid the
development and promotion of the FracSIS product suite.
FracSIS is an innovative 3-dimensional data storage, management,
and visualisation system that enables routine integration
of disparate geological data. FracSIS is user-friendly software
that can be applied at all levels in exploration or mining,
with 3D visualisation and interrogation of geological data
leading to improved drill targeting and decision making.
GD is providing geological, geophysical and exploration
expertise to the Fractal Technologies development team to
ensure FracSIS meets the needs of the minerals exploration
community. FracSIS is now routinely used in GD exploration
projects (see examples under more).
GD has extensive practical
experience of the design, supervision, QA/QC and interpretation
of geochemical surveys in a diverse range of geomorphological
and geological environments. These range from traditional
stream sediment, soil or lag surveys, to specialised regolith
sampling or application of selective leach techniques such
as BCL, MMI or calcrete sampling. A range of other specialised
geochemical techniques such as resistate indicator mineral
signatures, U-Pb zircon dating and isotope applications
are also available through alliances with other groups.
GD routinely conducts project
and property assessment for all sectors of the mining and
exploration industry ranging from global mining houses to
start up companies. GD members have extensive experience
in undertaking due diligence evaluations on regional scale
greenfields programs through to more advanced projects.
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All GD members are experienced
in data management and data manipulation. This includes
proficiency with Access databases, MapInfo and ArcView GIS,
and the FracSIS data management system.
Like most assets, databases lose
value over time and require expensive maintenance. GD specialises
in value-adding and creating business opportunities from
depreciating data assets held by client companies through
a process of 'data boxing'. This involves recognition of
potential concepts and targets of broader commercial interest
in 'underperforming' company databases through a process
of auditing and marketing using GD expertise. Back
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