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3D Mineral mapping of Queensland - Version 2 ASTER and related geoscience products
The digital 3-dimenional (3D) mineral mapping suite of Queensland comprises ~20 “standardized” products at the spectral resolution of the ASTER (Advanced Space-borne Thermal Emission and Reflection Radiometer) sensor and generated from publicly-available satellite, airborne, field and drill core spectral data spanning the visible near i... morenfrared (VNIR; 0.4 to 1.0 µm), shortwave infrared (SWIR; 1.0 to 2.5 µm) and thermal infrared (TIR; 7.5 to 12.0 µm) wavelength regions, including:
1. Satellite ASTER maps at both 30 m and 90 m pixel resolution with complete coverage of the state of Queensland, i.e. 1.853 million km²;
2. Airborne HyMap maps at ~5 m pixel resolution with a coverage of ~25,000 km2 from areas across north Queensland;
3. Field point samples (~300) from the National Geochemical Survey of Australia (NGSA) collected from a depth of 0-10 cm of flood overbank sediments;
4. Drill-core profiles (~20) of the National Virtual Core Library (NVCL) selected from the area around the Georgetown seismic line (07GA-IG2).
Key to the processing of the remote sensing data-sets (ASTER and HyMap) was the implementation of unmixing methods to remove the effects dry and green vegetation. This unmixing was not applied to the Australian ASTER geoscience maps released in 2012 (called here Version 1 or V1) resulting in extensive areas with little/no mineral information because of the need to apply masks. The vegetation unmixing methods used in the Version 2 (V2) processing of the ASTER and HyMap imagery has resulted in very few areas without coherent mineral information.
The resultant V2 “mineral group” products were designed to measure mineral information potentially useful for mapping: (i) primary rock composition; (ii) superimposed alteration effects; and (iii) regolith cover. These V2 products may assist in mapping soil properties and groundwater conditions. However their relatively low spectral resolution (based on ASTER’s 14 VNIR-SWIR-TIR bands) means that they do not provide the high level of mineralogical detail available from hyperspectral systems (>100 spectral bands), like HyMap and the HyLogger. Nevertheless, the relatively low spectral resolution of ASTER means that all other sensor data can be spectrally resampled to that resolution. Furthermore, the ASTER global data archive, which now spans entire Earth’s land surface <80degrees latitude, means that it can be used as global base-map for integrating all other spectral data.
Earth Sciences not elsewhere classified
Environmental Sciences not elsewhere classified
Geology not elsewhere classified
Geomorphology and Regolith and Landscape Evolution
Geophysics not elsewhere classified
Mineralogy and Crystallography
Photogrammetry and Remote Sensing
Soil Sciences not elsewhere classified
The raw ASTER data used in this project are freely available from the United States Geological Survey (USGS) Land Processes Distributed Active Archive Centre (LPDAAC) (https://lpdaac.usgs.gov/dataset_discovery/aster/aster_products_table/ast_l1t) as well as NASA’s REVERB (http://reverb.echo.nasa.gov) and Japan’s Advanced Institute for Science Technology (AIST) https://gbank.gsj.jp/madas/map.
The Australian ASTER Geoscience (V1) Maps can be downloaded from CSIRO’s Data Access Portal (DAP) (https://data.csiro.au/dap/landingpage?pid=csiro%3A6182) and Geoscience Australia’s Australian Geoscience Information Network, Geoscience Australia (AUSGIN) (http://portal.geoscience.gov.au/gmap.html).
The NVCL data can be downloaded from http://www.auscope.org.au/nvcl or http://portal.geoscience.gov.au/gmap.html.
The National Geochemical Survey of Australia (NGSA) spectral data is accessible via CSIRO’s Data Access Portal http://www.ga.gov.au/about/projects/minerals-archive/concluded/national-geochemical-survey.
All the derived geoscience products were developed as part of a collaborative project between the CSIRO and the Geological Survey of Queensland. This project was funded by the Geological Survey of Queensland as part of the Industry Priorities Initiative, under the Future Resources Program of the Queensland Government, as well as CSIRO Minerals. Access to NGSA samples was provided through the help of Patrice de Caritat and Matilda Thomas from Geoscience Australia.
Creative Commons Attribution 4.0 International Licence
CSIRO (Australia), Geological Survey of Queensland (Australia)
Cudahy, Tom; Jones, Mal; Lisitsin, Vladimir A.; Caccetta, Mike; Collings, Simon; Bateman, Roger (2017): 3D Mineral mapping of Queensland - Version 2 ASTER and related geoscience products. v4. CSIRO. Data Collection.
All Rights (including copyright) CSIRO, Geological Survey of Queensland 2017.
The metadata and files (if any) are available to the public.
3D Mineral Map of Queensland - Stage 1
One of the main objectives of the CSIRO-GSQ Queensland 3D Mineral Mapping project was public delivery of state-wide ASTER geoscience maps corrected for a number of issues, especially green and dry vegetation cover, that hindered optimum geological use of the Australian ASTER Version 1 (V1) geoscience maps. These corrected Version 2 (V2) ASTER min... moreeral maps spanning the State of Queensland can then be used as a basemap for the integration of other publicly avaliable spectra (drill core, field, airborne and space-borne) data, which were also collected as part of the project and processed using similar geoscience information extraction methods but down-sampled to simulate ASTER's spectral resolution. This process enabled the same spectral-mineral information products (~20) to be generated/delivered in 3D from "fresh rock to space" less
3D mineral maps of Queensland from drillcore, field, airborne and satellite reflectance data
satellite ASTER, airborne HyMap, field ASD, drill-core NVCL, satellite Hyperion
Vladimir A. Lisitsin
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