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Structural evolution of the South Nicholson region: insight from the 2017 L210 reflection seismic survey

The structural evolution of the South Nicholson region is not well understood, hindering full appraisal of the resource potential across the region. Here, we outline new insights from a recent deep-reflection seismic survey, collected as part of the Australian Government’s Exploring for the Future initiative. The new seismic profiles, and new field observations and geochronology, indicate that the South Nicholson region was characterised by episodic development of a series of ENE-trending half grabens. These graben structures experienced two major episodes of extension, at ca. 1725 Ma and ca. 1640 Ma, broadly correlating with extensional events identified from the Lawn Hill Platform and the Mount Isa Province to the east. Southward stratal thickening of both Calvert and Isa Superbasin sequences (Paleoproterozoic Carrara Range and McNamara groups, respectively) into north-dipping bounding faults is consistent with syndepositional extension during half graben formation. Subsequent basin inversion, and reactivation of the half graben bounding faults as south-verging thrusts, appears to have been episodic. The observed geometry and offset are interpreted as the cumulative effect of multiple tectonic events, including the Isan Orogeny, with thrust movement on faults occurring until at least the Paleozoic Alice Springs Orogeny.


<b>Citation:</b> Carson, C.J.. Henson, P.A., Doublier, M.P., Williams, B., Simmons, J., Hutton, L. and Close, D., 2020. Structural evolution of the South Nicholson region: insight from the 2017 L210 reflection seismic survey. 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.

Simple

Identification info

Date (Creation)
2020-01-08
Date (Publication)
2020-06-19T06:09:06
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/133051

Citation identifier
Digital Object Identifier/http://dx.doi.org/10.11636/133051

Cited responsible party
Role Organisation / Individual Name Details
Author

Carson, C.J.

Author

Henson, P.A.

Author

Doublier, M.P.

Author

Williams, B.

Author

Simmons, J.

Author

Hutton, L.

Author

Close, D.

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

Southby, C.

MEG Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

Temporal extent

Time period
2017-05-01 2019-12-31

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

Feature type
  • South Nicholson Basin

Project
  • EFTF

Feature type
  • Basin evolution

Discipline
  • Reflection Seismic L210

Project
  • Exploring For The Future

Theme
  • Basins

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

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
OnLine resource

Extended Abstract for download (pdf) [4MB]

Extended Abstract for download (pdf) [4MB]

Distribution format
  • pdf

Resource lineage

Statement

The structural evolution described here is derived from analysis of the South Nicholson Deep Crustal Reflection Seismic survey (L210, e.g. Carr et al., 2019, GA Record 2019/21), the complementary SHRIMP geochronology program and fieldwork, in collaboration with external collaborators (NTGS and GSQ). The interpretations may be subject to change as further information is acquired and analysed across the region (e.g. Barkly Deep Crustal Reflection Seismic Survey, L212 and proposed stratigraphic drilling).

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/a0713556-7422-47fe-9a44-31d6f467bf91

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

Southby, C.

MEG Internal Contact

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/133051

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/a0713556-7422-47fe-9a44-31d6f467bf91

Metadata linkage

https://ecat.ga.gov.au:80/geonetwork/srv/eng/catalog.search#/metadata/a0713556-7422-47fe-9a44-31d6f467bf91

Metadata linkage

https://ecat.ga.gov.au/geonetwork/ofmj3/eng/catalog.search#/metadata/a0713556-7422-47fe-9a44-31d6f467bf91

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

Basin evolution Basins EFTF Exploring For The Future Reflection Seismic L210 South Nicholson Basin
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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