Rock geochemistry from the Curnamona Province and Delamerian Orogen  


Authors / CoAuthors

Schroder, I. | Taylor, H. | Champion, D. | Doublier, M. | Gilmore, P. | Clark, A. | Main, P. | Cheng, Y. | Ashley, P. | Cairns, C. | Cayley, R. | Byass, J. | Gilmore, S. | Long, I.

Abstract

This report contains new whole-rock and isotope geochemical data, associated sample metadata, an assessment of the data’s quality assurance, for 742 samples collected in and around the Curnamona and Delamerian provinces, across numerous drillcore sampling campaigns through 2021-23. The data can be downloaded via the Geoscience Australia EFTF portal (https://portal.ga.gov.au/persona/eftf) or in the files attached with this record (http://pid.geoscience.gov.au/dataset/ga/148651). Geochemical sampling in the Curnamona region straddles both South Australia and New South Wales. The objective of sampling was to obtain representative coverage (both stratigraphically and spatially) to support developing regional geochemical baselines (in conjunction with existing geochemistry). Thus, this sampling included both the Curnamona Province and the overlying basins (Eromanga Basin, Lake Eyre Basin). Whole-rock geochemistry is reported for 562 samples, with a subset of 13 samples analysed for Pb and Sr isotopes, and another subset of 36 samples analysed by thin section petrography (all presented herein). Geochemical sampling in the Delamerian region has focussed on available legacy drill core in South Australia, New South Wales and Victoria. The objective of sampling was to (systematically) constrain the geochemical character of magmatic rocks across the mainland extent of the Delamerian Orogen, as well as younger volcanics within the Delamerian Orogen and/or overlying cover. This geochemical sampling was conducted in conjunction with geochronology, mineral systems sampling and stratigraphic drilling (all components of the DCD project) to reinterpret the timing, character and fertility of the Delamerian Orogen. Whole-rock geochemistry is reported for 180 samples. Version 2.0 (published 28 November 2023) has added whole rock geochemistry for 22 new samples in the Delamerian region. The data products and report have been updated accordingly.

Product Type

document

eCat Id

148651

Contact for the resource

  Resource provider

 

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

  Point of contact

 

Digital Object Identifier

https://dx.doi.org/10.26186/148651

Keywords

( Project )
  • EFTF – Exploring for the Future
( Project )
  • Darling-Curnamona-Delamerian
  • Geochemistry
  • Delamerian
  • Curnamona Province
  • Petrography
  • Whole rock
  • QAQC
  • strontium isotopes
  • isotopes
theme.ANZRC Fields of Research.rdf
  • Inorganic geochemistry
  • Published_External

Publication Date

2023-09-11T00:01:09

Creation Date

2023-09-03T12:00:00

Security Constraints

Australian Government Security Classification System    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Use - license otherRestrictions

Status

completed

Purpose

Data release containing the for whole-rock geochemistry of Curnamona and Delamerian rocks collected as part of Exploring for the Future. The release contains the geochemistry, methods, metadata and QAQC assessment to facilitate best re-use of the data.

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Record RECORD 2023/38

Lineage

<div>This data is primarily new geochemistry data from legacy drillholes accessed from the Broken Hill (GSNSW) and Tonsely (GSSA) core libraries.</div><div>It also includes a subset of reanalysed rock geochemistry from outcrop and seismic traverse powders archived in Geoscience Australia were originally collected by BMR and AGSO, GA’s predecessor organisations. </div><div>These samples were analysed as part of the Exploring for the Future program to provide a modern range of elements and precision/accuracy. This data will supersede the original data (where applicable) within the inorganic geochemistry database and the data available at portal.ga.gov.au. Requests can still be made for the original data as it is kept within the inorganic geochemistry database in a non-visible state.</div> Version 2.0 (published 28 November 2023) has added whole rock geochemistry for 22 new samples in the Delamerian region. The data products and report have been updated accordingly

Parent Information

Extents

[-36, -29, 139, 143]

Reference System

GDA94 / geographic 2D (EPSG: 4283)

Spatial Resolution

Service Information

Associations

Downloads and Links

Download the Record (pdf) [5.5 MB]  

Download the data (xlsx) [908.2 KB]  

Source Information