Cambrian convergent margin configuration in the Delamerian Orogen of mainland Australia  


Authors / CoAuthors

Clark, A. | Gilmore, P. | Mole, D. | Cheng, Y. | Jiang, W. | Doublier, M. | Taylor, H. | Pitt, L. | Lewis, C. | Roach, I. | Sanchez, G. | Thomas, M. | Budd, A. | Czarnota, K.

Abstract

<div><strong>Output type: </strong>Exploring for the Future Extended Abstract </div><div><br></div><div><strong>Short Abstract: </strong>The Delamerian Orogen, with a length of ~1000 km on mainland Australia and a proven potential to host mineralisation, represents an evolving exploration opportunity. However, uncertainty surrounding the age and tectonic setting of the orogen is a barrier to confident exploration in frontier covered regions, such as the Loch Lilly-Kars Belt in western New South Wales and South Australia. A major area of uncertainty is the configuration and extent of the Cambrian convergent-margin system and lateral variations thereof. In this study, we highlight multidisciplinary data from new and legacy sources, including lithology, geochronology, geochemistry, potential-field geophysics, deep-crustal seismic, and magnetotelluric data that permit a revised interpretation of the geological framework for the Delamerian Orogen in mainland Australia, with an emphasis on the covered, central part of the system. These data indicate that a largely continuous, east-facing volcanic arc developed in the Delamerian Orogen in the Cambrian. The arc transitions from exhibiting a strong continental affinity in the Koonenberry Belt to having less continental affinity in the Grampians-Stavely Zone of Victoria. The Loch Lilly-Kars Belt is interpreted to have occupied a volcanic arc to incipient back-arc position in the middle Cambrian.&nbsp;</div><div><br></div><div><strong>Citation: </strong>Clark A.D., et al., 2024. Cambrian convergent margin configuration in the Delamerian Orogen of mainland Australia. In: Czarnota, K. (ed.) Exploring for the Future: Extended Abstracts, Geoscience Australia, Canberra, https://doi.org/10.26186/149647 </div>

Product Type

document

eCat Id

149647

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Digital Object Identifier

https://dx.doi.org/10.26186/149647

Keywords

( Project )
  • Darling-Curnamona-Delamerian
( Project )
  • EFTF – Exploring for the Future
( Project )
  • MinEx CRC – Mineral Exploration Cooperative Research Centre
  • Delamerian Orogen
  • Loch Lilly-Kars Belt
  • Lake Wintlow Belt
theme.ANZRC Fields of Research.rdf
  • Structural geology and tectonics
  • Published_External

Publication Date

2024-09-23T04:08:18

Creation Date

2024-05-31T12:00:00

Security Constraints

Australian Government Security Classification System    

Classification - unclassified

Legal Constraints

Use - license otherRestrictions

Status

completed

Purpose

This product highlights the key impacts of multidisciplinary data collected from the Delamerian Orogen during the Exploring for the Future Program. The implications of these data on the tectonic setting of parts of the Delamerian Orogen in the Cambrian is presented.

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asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

<div>This abstract has been created based on recent data obtained during the second stage of the EFTF program.</div>

Parent Information

Extents

[-44.00, -9.00, 112.00, 154.00]

Reference System

Spatial Resolution

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Extended Abstract for download (pdf) [1.3 MB]  

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