New U-Pb SHRIMP zircon geochronology from NDI drilling of the Delamerian Orogen: Loch-Lilly-Kars and Lake Wintlow Belts, southwest NSW

Geoscience Australia’s Exploring for the Future program provides precompetitive information to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, we are building a national picture of Australia’s geology and resource potential. This leads to a strong economy, resilient society and sustainable environment for the benefit of all Australians. This includes supporting Australia’s transition to net zero emissions, strong, sustainable resources and agriculture sectors, and economic opportunities and social benefits for Australia’s regional and remote communities. The Exploring for the Future program, which commenced in 2016, is an eight year, $225m investment by the Australian Government.


This Record presents new U-Pb zircon geochronology from the Loch-Lilly Kars and Lake Wintlow (as described by Clark et al. 2024) Belts of the central Delamerian Orogen (Foden et al., 2020; Gilmore et al., 2023; Mole et al., 2023), performed on Geoscience Australia’s (GA) sensitive high-resolution ion microprobe (SHRIMP). The eight samples presented here (three sedimentary and five igneous rocks; Table i) were collected during Geoscience Australia’s drilling campaign across the region, which consisted of 17 drill-holes (Pitt et al., 2023), using two drilling techniques (coiled-tube rotary and conventional diamond). This work was performed as part of the MinEx CRC National Drilling initiative (NDI) and Geoscience Australia’s Darling-Curnamona-Delamerian project of the Exploring for the Future program (EFTF; <a href=" https://www.eftf.ga.gov.au/">https://www.eftf.ga.gov.au/</a>). The primary aims of this drilling were to (1) understand and constrain the geology of the southern Loch-Lilly Kars Belt; and (2) assess whether Cambrian magmatic rocks continued to the south-west in the Lake Wintlow Belt, marking a possible continuation of the Stavely Belt volcanic arc rocks observed in western Victoria (Bowman et al., 2019; Lewis et al., 2016; Lewis et al., 2015; Schofield, 2018; Figure i). As both these regions are covered, this new drilling and the geochronology they allow provide the first constraints on the age of these rock units. In addition, due to the lack of surface correlation and detailed geological mapping, these units currently have no officially-defined stratigraphic nomenclature and remain unnamed. For detailed information on all drill-holes completed as part of the survey, we direct readers to the summary report by Pitt et al. (2023): <a href=" https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/148639">eCat 148639</a>.

Simple

Identification info

Date (Creation)
2024-03-22T05:00:00
Date (Publication)
2024-06-18T03:30:53
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149417

Citation identifier
Digital Object Identifier/https://dx.doi.org/10.26186/149417

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

 Voice
Author

Mole, D.

 Internal Contact
Author

Clark, A.

 Internal Contact
Author

Bodorkos, S.

 Internal Contact
Author

Lewis, C.

 Internal Contact
Name

Record

Issue identification

GA Record 2024/21

Purpose

Geochronology report on recent samples from GA's NDI Delamerian Margins drilling.

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

Minerals, Energy and Groundwater Division

 External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Mole, D.

 Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Not planned

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

Project

  • Darling-Curnamona-Delamerian

Project

  • EFTF – Exploring for the Future

Project

  • National Drilling Initiative (NDI)

Keywords

  • zircon

Keywords

  • U-Pb geochronology

Keywords

  • SHRIMP (Sensitive High Resolution Ion Microprobe)

Keywords

  • Delamerian Orogen

Keywords

  • Loch Lilly-Kars Belt

Keywords

  • Tasmanides

theme.ANZRC Fields of Research.rdf

  • Geochronology

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) Commonwealth of Australia (Geoscience Australia) 2024

Resource 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
Classification system

Australian Government Security Classification System

Associated resource

Association Type
Informed
Title

Architecture, evolution and fertility of the Delamerian Orogen: Insights from zircon

Citation identifier
148981

Citation identifier
57358269-f001-456f-9be9-bec81a865f6b

Website

http://pid.geoscience.gov.au/dataset/ga/148981

Link to eCat metadata record landing page

Associated resource

Association Type
Informed
Title

The Delamerian Orogen: exposing an undercover arc

Citation identifier
148679

Citation identifier
5fc80ca5-0be4-4dfe-b68d-c48a72886b1b

Website

http://pid.geoscience.gov.au/dataset/ga/148679

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 facsimile
OnLine resource

Download Report (pdf) [177.4 MB]

Download Report (pdf) [177.4 MB]

Distribution format

  • pdf

    File decompression technique

    nil

Resource lineage

Statement

<div>Data created March 19th 2024.</div>

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/8b653421-6b26-43b2-a1c4-a85644a39033

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

Mole, D.

 Internal Contact

Type of resource

Resource scope
Document
Name

GA Record

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/149417

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/8b653421-6b26-43b2-a1c4-a85644a39033

Date info (Creation)
2024-04-19T06:53:56
Date info (Revision)
2024-04-19T06:53:56

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
http://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Darling-Curnamona-Delamerian EFTF – Exploring for the Future National Drilling Initiative (NDI)
theme.ANZRC Fields of Research.rdf
Geochronology

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Associated resources

Not available