From Geoscience Australia
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National ASTER Map AlOH group content

Created 17/10/2025

Updated 17/10/2025

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Band ratio: (B5+B7)/B6 Blue is low abundance, Red is high abundance potentially includes: phengite, muscovite, paragonite, lepidolite, illite, brammalite, montmorillonite, beidellite, kaolinite, dickite Useful for mapping: (1) exposed saprolite/saprock (2) clay-rich stratigraphic horizons; (3) lithology-overprinting hydrothermal phyllic (e.g. white mica) alteration; and (4) clay-rich diluents in ore systems (e.g. clay in iron ore). Also combine with AlOH composition to help map: (1) exposed in situ parent material persisting through "cover" which can be expressed as: (a) more abundant AlOH content + (b) long-wavelength (warmer colour) AlOH composition (e.g. muscovite/phengite).

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Additional Info

Field Value
Title National ASTER Map AlOH group content
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/6d762ef7-23b2-47d4-9f47-afe2067601c5
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 11/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        111.5,
        -44.5
      ],
      [
        155.0,
        -44.5
      ],
      [
        155.0,
        -9.0
      ],
      [
        111.5,
        -9.0
      ],
      [
        111.5,
        -44.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "National ASTER Map AlOH group content". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/national-aster-map-aloh-group-content