ASTER Map of Western Australia

1
ASTER Map of Western Australia
A collaborative project between C3DMM - Western
Australian Centre of Excellence for 3D Mineral
Mapping GSWA Geological Survey of Western
Australia
Introduction The WA ASTER Map is a collaborative
project between CSIROs Western Australian
Centre of Excellence for 3D Mineral Mapping
(http//c3dmm.csiro.au/) and GSWA. This project
is part of a bigger initiative with the
Australian geological surveys (federal and state)
working towards an ASTER geoscience map of the
Australian continent. Amongst the national set of
standard, publicly available, web accessible
geoscience products derived from ASTER (Advanced
Spaceborne Thermal Emission and Reflective
Radiometer, http//asterweb.jpl.nasa.gov/) are
the following maps
Kaolin content Advanced argillic alteration
high
low

• False colour
• Green vegetation content
• CSIRO regolith ratios
• AlOH group (clay) content composition
• Kaolin and Advanced argillic alteration
• Ferric oxide content
• Ferrous iron content
• Opaques
• Fe-OH group content
• MgOH/carbonate group composition
• Ferrous iron content in MgOH
• Ferric iron content in MgOH

Ferrous iron abundance index
high
low
7720000
False Colour
Table 1 Specifications of the Advanced
Spaceborne Thermal Emission and Reflective
Radiometer (ASTER)
7700000
7700000
Processing and Delivery Compared to Landsat,
ASTER has five additional bands in the SWIR
(Table 1), which can be used to identify
additional mineral groups, such as clay minerals,
carbonates and hydrated MgOH-bearing silicates.
However, the processing methodology must correct
for instrument and atmospheric effects before
mineral information can be extracted. C3DMM is
developing workflows and software applications,
that include these processing steps to deliver
seamless, cross-calibrated, high-quality
geoscience products. The displayed images (false
colour composite, ferrous iron abundance
index, kaolin content advanced argillic
alteration) show preliminary geoscience
products. The delivery of the final WA ASTER Map
is scheduled for June 2011, whereas the release
of the national Australian Geoscience Map is
planned during the 34th International Geological
Congress in Brisbane, August 2012.
470000
450000
ASTER related literature Cudahy, T., Jones, M.,
Thomas, M., Laukamp, C., Caccetta, M., Hewson,
R., Rodger, A., Verrall, M. (2008) Next
Generation Mineral Mapping Queensland airborne
HyMap and satellite ASTER surveys 2006-2008.-
CSIRO report P2007/364, 161pp. Hewson, R.D.,
Cudahy, T.J., Mizuhiko, S., Ueda, K., Mauger, K.
(2005) Seamless geological map generation using
ASTER in the Broken Hill-Curnamona province of
Australia.- Remote Sensing of Environment, 99,
159-172. Hewson, R.D., and Cudahy, T.J. (2010).
Geological mapping accuracy issues using ASTER
in Australia. Applications in ASTER, Land Remote
Sensing and Global Environmental Change NASAs
Earth Observing System and the Science of ASTER
and MODIS. Eds. Ramachandran, B, Justice, C, and
Abrams M., Springer, New York.. Jones, M.,
Cudahy, T., Thomas, M., Laukamp, C. (2008)
Hyperspectral and ASTER mineral maps of
Queensland.- Preview, Australian Soc. of
Exploration Geologists, 136, 28-29. Laukamp, C.
(2008) Validation of Spectral Techniques for
Exploration in the Mt Isa Terrane.- In Sheldon,
H.A. Enabling Technologies - pmdCRC Project M4,
M9 F6 Final Rep., 89-94.
contact Tom Cudahy phone (08) 6436
8630 email thomas.cudahy_at_csiro.auweb http//c3d
mm.csiro.au