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
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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
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EFTF Extended Abstract
- Status
- Completed
- Point of contact
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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
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Product data repository: Various Formats
- Website
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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
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EARTH SCIENCES
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- Stratum
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Crust structure
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- Project
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AusArray
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- Discipline
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Ambient Noise Tomography
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- Keywords
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Published_External
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- Keywords
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Exploring for the Future
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- Keywords
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EftF
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- Keywords
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Passive Seismic
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- Keywords
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Crust
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- Keywords
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Basins
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- Keywords
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Structures
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Associated resource
- Association Type
- Informed
- Title
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Ambient noise tomography of Australia: Application to AusArray deployment - Update
- Citation identifier
- 148676
- Citation identifier
- 7abf9351-a186-4afb-b3ba-b1276f551972
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Extended Abstract for download (pdf) [11.2 MB]
Extended Abstract for download (pdf) [11.2 MB]
- Distribution format
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pdf
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Resource lineage
- Statement
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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
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/97cda114-ff90-45b2-9fda-97fe319cc191
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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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
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GA publication: Extended Abstract
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/135130
- Date info (Creation)
- 2019-04-08T01:55:29
- Date info (Revision)
- 2019-04-08T01:55:29
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551