The structural architecture of the central North West Shelf – insights from regional scale mapping of the Triassic succession

The central North West Shelf has been the focus of a regional mapping program by Geoscience Australia targeting the Triassic succession. Resulting updates to the regional structural understanding are presented, showcasing variations in structural style across the region. The Triassic section is affected by fault sets with two predominant orientations across the study area: N-trending and NE-trending, with localised areas of NW-trending faulting. There is typically vertical separation of faulting between the upper Triassic and lower Triassic successions, resulting in different fault fabrics mapped on the top and base Triassic surfaces. In some areas major faults penetrate through the Mesozoic section and into the Paleozoic basement, forming features with significant displacement such as the Thouin Graben, Whitetail Graben, Naranco High, and the Barcoo Sub-basin half graben. Isochore maps reveal two Triassic depocentres separated by an area of thin Triassic extending from the inboard Bedout Sub-basin out to the western Rowley Sub-basin and NE Exmouth Plateau. This new mapping shows that there is a poor correlation between Triassic depocentres and existing basin boundaries, making it difficult to clearly describe regions of interest and their evolution. Greater integration of new structural insights into a regional structural framework is necessary to improve our understanding of the tectonostratigraphic evolution of the margin, and the stratigraphic and structural aspects of exploration risk.


This abstract was submitted to/presented at the 2019 Australasian Exploration Geoscience Conference (AEGC 2019) ( https://www.aig.org.au/aegc-2019-data-to-discovery/)

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Identification info

Date (Creation)
2019-03-22
Date (Publication)
2023-06-09T05:31:16
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/127633

Cited responsible party
Role Organisation / Individual Name Details
Author

Orlov, C.
Author

Nicholson, C.
Co-author

Bernardel, G.
Co-author

Abbott, S.T.
Co-author

Rollet, N.
Purpose

Submission for the 2019 Australasian Exploration Geoscience Conference (AEGC) 2-5 September, Perth WA

Status
Completed
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Role Organisation / Individual Name Details
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Commonwealth of Australia (Geoscience Australia)

 Voice
Resource provider

Minerals, Energy and Groundwater Division

 External Contact
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Nicholson, C.

 MEG Internal Contact
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Topic category
  • Geoscientific information

Extent

Temporal extent

Time period
2019-01-01 2019-03-22

Extent

N
S
E
W


Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

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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

Keywords

  • North West Shelf

Keywords

  • Roebuck Basin

Keywords

  • Triassic

Keywords

  • seismic interpretation

Keywords

  • Published_External

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Title

Creative Commons Attribution 4.0 International Licence

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CC-BY

Edition

4.0

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http://creativecommons.org/licenses/

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License

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Unclassified
Language
English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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Link to the Conference Page

Link to the Conference Page

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OnLine resource

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Link to Extended Abstract

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Statement

Submission for the 2019 Australasian Exploration Geoscience Conference (AEGC) 2-5 September, Perth WA

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Dataset

Metadata constraints

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/09a6d197-2936-401a-b058-27b45088da65

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GeoNetwork UUID

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/127633

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/09a6d197-2936-401a-b058-27b45088da65

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/09a6d197-2936-401a-b058-27b45088da65

Metadata linkage

https://ecat.ga.gov.au/geonetwork/dashboard/eng/catalog.search#/metadata/09a6d197-2936-401a-b058-27b45088da65

Date info (Creation)
2019-03-22T03:47:50
Date info (Revision)
2019-03-22T03:47:50

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3 (Draft Schemas 2015)

Edition date
2015-07-01T00:00:00
Title

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

Edition

Version 2.0, April 2015

 
 

Spatial extent

N
S
E
W


Keywords

North West Shelf Roebuck Basin Triassic seismic interpretation

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