• Product catalogue
  •  
  •  
  •  

Ambient noise tomography of Australia: application to AusArray deployment

For more than half a century, seismic tomography has been used to map the volumetric structure of Earth’s interior, but only recent advances in computation have enabled the application of this technique at scale. Estimates of surface waves that travel between two seismic stations can be reconstructed from a stack of cross-correlations of continuous data recorded by seismometers. Here, we use data from the Exploring for the Future program AusArray deployment to extract this ambient noise signal of Rayleigh waves and use it to image mid- to upper-crustal structure between Tennant Creek and Mount Isa. Our aim was to establish a repeatable, semi-automatic workflow that can be extended to the entire Australian continent and beyond. Shear wave velocity models at 4, 6, 8 and 10 s periods are presented. A strong low-velocity anomaly (2.5 km/s) at a period of 4 s (~2–4 km depth) delineates the outline of the newly discovered, and prospective for hydrocarbons, Carrara Sub-basin. A near-vertical high-velocity anomaly (3.5 km/s) north of Mount Isa extends from the near surface down to ~12 km and merges with northeast-trending anomalies. These elongate features are likely to reflect compositional variations within the mid-crust associated with major structures inferred to be associated with base metal deposits. These outcomes demonstrate the utility of the ambient noise tomography method of imaging first-order features, which feed into resource potential assessments.


<b>Citation: </b>Hejrani, B., Hassan, R., Gorbatov, A., Sambridge, M. Hawkins, R., Valentine, A., Czarnota, K. and Zhao, J., 2020. Ambient noise tomography of Australia: application to AusArray deployment. In: Czarnota, K., Roach, I., Abbott, S., Haynes, M., Kositcin, N., Ray, A. and Slatter, E. (eds.) Exploring for the Future: Extended Abstracts, Geoscience Australia, Canberra, 1–4.


<b>See eCat record <a href=" https://dx.doi.org/10.26186/148676">#148676</a> for the updated version of the model package.</b>

Simple

Identification info

Date (Creation)
2020-03-20T12:00:00
Date (Publication)
2020-05-19T23:27:27
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/135130

Citation identifier
Digital Object Identifier/http://dx.doi.org/10.11636/135130

Cited responsible party
Role Organisation / Individual Name Details
Author

Hejrani, B.

Author

Hassan, R.

Author

Gorbatov, A.

Author

Sambridge, M.

Author

Hawkins, R.

Author

Valentine, A.

Author

Czarnota, K.

Author

Zhao, J.

Purpose

EFTF Extended Abstract

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

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Hejrani, B.

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

Stratum
  • Crust structure

Project
  • AusArray

Discipline
  • Ambient Noise Tomography

Keywords
  • Published_External

Keywords
  • Exploring for the Future

Keywords
  • EftF

Keywords
  • Passive Seismic

Keywords
  • Crust

Keywords
  • Basins

Keywords
  • Structures

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

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

Associated resource

Association Type
Informed
Title

Ambient noise tomography of Australia: Application to AusArray deployment - Update

Citation identifier
148676

Citation identifier
7abf9351-a186-4afb-b3ba-b1276f551972

Website

http://pid.geoscience.gov.au/dataset/ga/148676

Link to eCat metadata record landing page

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice
OnLine resource

Extended Abstract for download (pdf) [11.2 MB]

Extended Abstract for download (pdf) [11.2 MB]

Distribution format
  • pdf

Resource lineage

Statement

Velocity models of the upper and middle crust are based on the Exploring for the Future Australian Passive Seismic Array (AusArray) dataset deployed between Tennant Creek and Mount Isa. Processing was undertaken using the HiPerSeis tools and codes referenced in the text in collaboration with the Research School of Earth Sciences at the Australian National University.


The model downloads were removed from this record 24/8/2023 - the new model package is accessible via eCat 148676 https://dx.doi.org/10.26186/148676.

Metadata constraints

Title

Australian Government Security Classification System

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

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

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/97cda114-ff90-45b2-9fda-97fe319cc191

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

Hejrani, B.

Type of resource

Resource scope
Document
Name

GA publication: Extended Abstract

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/135130

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/5167d912-6784-4371-9938-3931e84ca6f1

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/97cda114-ff90-45b2-9fda-97fe319cc191

Metadata linkage

https://ecat.ga.gov.au:80/geonetwork/srv/eng/catalog.search#/metadata/97cda114-ff90-45b2-9fda-97fe319cc191

Date info (Creation)
2019-04-08T01:55:29
Date info (Revision)
2019-04-08T01:55:29

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

Ambient Noise Tomography AusArray Basins Crust Crust structure EftF Exploring for the Future Passive Seismic Structures
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •