MINERAL RESOURCES FLAGSHIP

Queensland’s Version 2 ASTER mineral maps unmixed of the effects of green and dry vegetation

Tom Cudahy1,2, Mal Jones1,3, Vladimir Lisitsin3, Mike Caccetta1, Simon Collings 1 andRoger Bateman 1,4

1 CSIRO; 2 C3DMM Pty Ltd; 3 Geological Survey of Queensland; 4 Tenth Symphony Pty. Ltd

http://www.uncoverminerals.org.au/

• 2 year collaborative CSIRO-GSQ project (and JCU and GA)• Industry Priorities Initiative, Queensland

Government’s Future Resources Program• Dec 2004 to Dec 2006

• Why do the work?• Explorers empowered with spectral-

mineralogy (measurable regolith, geology and alteration geoscience information)

• Improve the mineral information content of the published ASTER Version 1 products

• Integrate the public spectral-mineral data collected from different sensor data types

• Scalable (State to deposit scales) 3D mineral information

• Broader implications• Extend products/methods

nationally/globally • Combine public and private spectral data

www.ga.gov.au/data-pubs/interactive-3d-models/world-wind-3d-data-viewer

Project Background

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

Project public spectral data

• ~800 satellite ASTER multispectral VNIR-SWIR-TIR images (each image being 60 by 60 km with both 30 and 90 m pixel footprints, i.e. provides complete state coverage at two spatial scales;

• An archive ~100 satellite Hyperion hyperspectral VNIR-SWIR images with each image being ~7 by 100 km, i.e. a total 60,000 km2 or ~3% state coverage.

• An archive ~250 airborne hyperspectral VNIR-SWIR HyMap flight-lines from a GSQ survey in 2006-2008 (Cudahy et al., 2008) with each flight-line being ~2.5 by 20 km and covering ~25,000 km2 across northern Queensland;

• ~300 field spectrometer (ASD Fieldspec) (VNIR-SWIR) and laboratory FTIR (Bruker Vertex 70/80v with an integrating sphere) (TIR) measured by CSIRO from the National Geochemical Survey of Australia (NGSA) sample suite; and

• ~20 NVCL hyperspectral VNIR-SWIR-TIR drill-cores were selected from the Georgetown seismic line (07GA-IG2).

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

ASTER AlOH Group content V1

NGSA validation data

http://www.ga.gov.au/about/projects/minerals-archive/concluded/national-geochemical-survey

Cudahy et al., 2016; http://www.nature.com/articles/srep23702

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

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USGS Library @ hyperspectral resolution

Cellulose

Lignin

Peppermint

Sycamore

2080 nm

2270 nm

2330 nm

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

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wavelength (microns)

USGS Library @ ASTER spectral resolution

Cellulose

Lignin

Peppermint

Sycamore

Band 6

Band 7Band 5Band 2

Band 3

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

Mineral Mapping - 10 vs 40 nm spectral resolution

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

ASTER dry vege index

HyMap HS 2080 nm continuum-depth

HyMap @ASTERdry vege index

ASTER dry vege index

Estimation of dry vegetation @ASTER spectral resolution

100% green vege

100% dry vege

0% green + dry vege

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

V1 ASTER AlOH group content

low high

• Regolith mapping• Exposed clay-rich soils – dust generation risk• Metasomatic phyllic alteration

e.g. Al-Clays: phengite, muscovite, paragonite, lepidolite, illite, brammalite, montmorillonite, kaolinite, dickite, beidellite Mt Carbine

Mt Carbine - ASTER V1 AlOH group composition

alunite http://portal.geoscience.gov.au/gmap.html

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

http://portal.geoscience.gov.au/gmap.html

V2 vegetation unmixing – Mt Carbine area

Cudahy 2016, http://www.mdpi.com/2076-3263/6/4/52

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

NGSA validation of ASTER AlOH Composition

R2=0.09NGSA www.ga.gov.au/about/projects/minerals-archive/concluded/national-geochemical-survey

R2=0.31

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

V1 ASTER AlOH group composition

low high

• Regolith mapping• Exposed clay-rich soils – dust generation risk• Metasomatic phyllic alteration

e.g. Al-Clays: phengite, muscovite, paragonite, lepidolite, illite, brammalite, montmorillonite, beidellite, kaolinite, dickite, alunite, pyrophyllite

Mt Carlton

Presentation title | Presenter name14 |

http://www.ga.gov.au/data-pubs/interactive-3d-models/world-wind-3d-data-viewer

Mt Carlton, ASTER Version 1 AlOH composition

alunite

Evolution Mining

15 km

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

Mt Carlton high sulphidation epithermal Au-Ag district: V2 ASTER AlOH_group_content AlOH_group_composition

MgOH_group_content

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

V1 ASTER MgOH group contente.g. chlorite, epidote, amphibole, talc, serpentine, calcite, dolomite

low high

• Geological mapping of mafic/UM rocks & carbonates• Greenschist facies metamorphism.• Metasomatic propylitic alteration

Mary Kathleen

Mary Kathleen, Mt Isa MgOH group ASTER & HyMap

limestones

mafic rocks

sedimentary rocks

granites

skarn

before vegetation unmixing

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

Mary Kathleen, Mt Isa MgOH group ASTER & HyMap

limestones

mafic rocks

sedimentary rocks

granites

skarn

after vegetation unmixing

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

V1 ASTER AlOH group composition

low high

• Regolith mapping• Exposed clay-rich soils – dust generation risk• Metasomatic phyllic alteration

e.g. Al-Clays: phengite, muscovite, paragonite, lepidolite, illite, brammalite, montmorillonite, kaolinite, dickite, beidellite

Mt Turner

Presentation title | Presenter name21 |

http://www.ga.gov.au/data-pubs/interactive-3d-models/world-wind-3d-data-viewer

Mt Turner, Qld - 3D Mineral Mapping @ASTER spectral resolutionNVCL drillcore, airborne HyMap and satellite ASTER+ seismics + interpreted geology

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

Mt Turner - Published alteration

• 12 km2 of silicic, potassic, phyllic, argillic and propylitic alteration

Rossiter 1979, BMR Journal

NS4NS1

NS2NS3

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

false colour + AlOH composition

V1 ASTER false colour +AlOH group composition

Updated ASTER scenefalse colour image

Mt Turner, Qld - 3D Mineral Mapping @ASTER spectral resolution

Updated ASTER sceneV2 AlOH group composition

Updated ASTER sceneAlOH group composition – no vege unmix

Mt Turner, Qld - 3D Mineral Mapping @ASTER spectral resolution

AlOH compositionkaolin illite

muscoviteadvanced argillic? phyllic?

Mt Turner, Qld - 3D Mineral Mapping @ASTER spectral resolutionNVCL drillcore, airborne HyMap + seismics + published geology

MIRA’s Geoscience Analyst 3D software

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

http://qdexdata.dnrm.qld.gov.au/flamingo ttps://data.csiro.au/dap/landingpage?pid=csiro:20912http://doi.org/10.4225/08/58a3aefb62e56

How to get the Queensland 3D mineral mapping data?

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

https://data.csiro.au/dap/landingpage?pid=csiro:20912https://data.csiro.au/dap/landingpage?pid=csiro:20912http://doi.org/10.4225/08/58a3aefb62e56

CSIRO Mineral Resources report EP1767 https://data.csiro.au/dap/landingpage?pid=csiro:20912

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

https://data.csiro.au/dap/landingpage?pid=csiro:20912

Summary• Complicating effects of green and dry vegetation isolated and

removed from the remote sensing data• All spectral data resampled to @ASTER resolution which enables

integration in 3D of derived mineral information products• ASTER V2 mineral information >90% coverage - previously

2008 SMEDG meetinghttps://smedg.org.au/TLS%20Kaylene%20Camuti.pdf

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

SE Qld surface PIMA samplingKaylene Camuti

https://smedg.org.au/TLS%20Kaylene%20Camuti.pdf

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

ASTER false colour image

kaolin, alunite, pyrophyllite

(advanced argillic)

muscovite, illite,montmorillonite(phyllic)

ASTER V2 AlOH_group_composition_mask

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

high content of dioctahedral silicate minerals

low content of dioctahedral

silicate minerals

ASTER V2 AlOH_group_content

QEC |Brisbane 17th February 2017 | Qld 3D mineral mapping | Cudahy et al.

Dr Tom Cudahy

Chief Scientist CSIRO, Mineral ResourcesAustralian Resources Research CentreKensington, Western Australia, 6151, AUSTRALIA

Director C3DMM Pty Ltd3/473 Cambridge StreetFloreat, Western Australia, 6014, AUSTRALIA

m +61 407 662 369e thomas.cudahy@c3dmm.com.auw http://c3dmm.com.au

MINERAL RESOURCES FLAGSHIP

mailto:thomas.cudahy@c3dmm.com.auhttp://c3dmm.csiro.au/

Queensland’s Version 2 ASTER mineral maps unmixed of the effects of green and dry vegetation Slide Number 2Project public spectral dataSlide Number 4Slide Number 5Slide Number 6Slide Number 7Estimation of dry vegetation @ASTER spectral resolutionV1 ASTER AlOH group contentSlide Number 10V2 vegetation unmixing – Mt Carbine area Slide Number 12V1 ASTER AlOH group compositionSlide Number 14Slide Number 15Mt Carlton high sulphidation epithermal Au-Ag district: V2 ASTER V1 ASTER MgOH group contentMary Kathleen, Mt Isa MgOH group ASTER & HyMapMary Kathleen, Mt Isa MgOH group ASTER & HyMapV1 ASTER AlOH group compositionSlide Number 21Slide Number 22Slide Number 23Slide Number 24Slide Number 25Slide Number 26Slide Number 27SummarySlide Number 29Slide Number 30Slide Number 31Slide Number 32Slide Number 33Slide Number 34