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Surficial and deep earth material prediction from geochemical compositions - a spatial predictive model

Prediction of true classes of surficial and deep earth materials using multivariate geospatial data is a common challenge for geoscience modellers. Most geological processes leave a footprint that can be explored by geochemical data analysis. These footprints are normally complex statistical and spatial patterns buried deep in the high-dimensional compositional space. This paper proposes a spatial predictive model for classification of surficial and deep earth materials derived from the geochemical composition of surface regolith. The model is based on a combination of geostatistical simulation and machine learning approaches. A random forest predictive model is trained and features are ranked based on their contribution to the predictive model. To generate potential and uncertainty maps, compositional data are simulated at unsampled locations via a chain of transformations (isometric log-ratio transformation followed by flow anamorphosis) and geostatistical simulation. The simulated results are subsequently back-transformed to the original compositional space. The trained predictive model is used to estimate the probability of classes for simulated compositions. The proposed approach is illustrated through two case studies. In the first case study the major crustal blocks of the Australian continent are predicted from the surface regolith geochemistry of the National Geochemical Survey of Australia project. The aim of the second case study is to discover the superficial deposits (peat) from the regional-scale soil geochemical data of the Tellus project. The accuracy of the results in these two case studies confirms the usefulness of the proposed method for geological class prediction and geological process discovery.

Simple

Identification info

Date (Creation)
2018-08-27T09:00:00
Date (Publication)
2023-10-26T06:24:02
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/122495

Cited responsible party
Role Organisation / Individual Name Details
Author

Talebi, H.

Author

Mueller, U.

Author

Tolosana-Delgado, R.

Author

Grunsky, E.

Author

McKinley, J.M.

Author

de Caritat, P.

Publisher

Springer Nature

External Contact
Name

Natural Resources Research

Issue identification

Volume 28, 2019

Page

869-891

Purpose

Article for submission to Natural Resources Research journal

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Resource provider

Minerals, Energy and Groundwater Division

External Contact
Point of contact

Main, P.

MEG Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

Extent

N
S
E
W


Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES

Keywords
  • Compositional data

Keywords
  • Log-ratio

Keywords
  • flow anamorphosis

Keywords
  • geostatistical simulation

Keywords
  • machine learning

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License
Other constraints

(c) 2018 The Author(s)

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice facsimile
OnLine resource

Link to Journal

Link to Journal

Distribution format

Resource lineage

Statement

Article for submission to Natural Resources Research journal

Hierarchy level
Document

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/8e76cf53-dd98-4361-abe4-0b72612c3ebe

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Main, P.

MEG Internal Contact

Type of resource

Resource scope
Document
Name

Journal Articles and Conference Papers

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/122495

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/8e76cf53-dd98-4361-abe4-0b72612c3ebe

Metadata linkage

https://ecat.ga.gov.au:80/geonetwork/srv/eng/catalog.search#/metadata/8e76cf53-dd98-4361-abe4-0b72612c3ebe

Date info (Creation)
2018-05-04T03:37:56
Date info (Revision)
2018-05-04T03:38:12

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Compositional data Log-ratio flow anamorphosis geostatistical simulation machine learning
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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