Authors / CoAuthors
Doublier, M. | Clark, A. | Korsch, R.J. | Miller, R. | Gilmore, P. | Folkes, C. | Mahoney, L. | Abdullah, R. | Cayley, R. | Cheng, Y. | Fraser, G. | Jiang, W. | Krapf, C. | McLean, M. | Mole, D. | Nicoll, M. | Skladzien, P. | Thiel, S. | Wade, C. | Wise, T. | Rasheed, H. | Hossain, M. | Costelloe, R. | Czarnota, K.
Abstract
<div><strong>Output type: </strong>Exploring for the Future Extended Abstract</div><div><br></div><div><strong>Short abstract: </strong> Crustal architecture provides first order controls on the distribution of mineral resources of an area and is best imaged by deep seismic reflection data. Here we present a first interpretation of seismic line 22GA-CD2, acquired as part of the Darling-Curnamona-Delamerian (DCD) project. Line 22GA-CD2 images the central eastern Delamerian Orogen, where basement rocks are concealed by the Murray Basin. Key findings include: (i) the crustal architecture preserves many characteristics of the early evolution of west-dipping Delamerian subduction, accretion and orogeny between ~ 515 Ma - 495 Ma. This initial configuration has been reworked and reactivated during younger orogenic events; (ii) the lower and middle crust constitutes the newly defined Barrier Seismic Province, which is also imaged in legacy seismic reflection line 05GA-TL1 and interpreted to continue northeast to the Olepoloko Fault; (iii) a similar seismic character to that of the Barrier Seismic Province has been observed in legacy seismic reflection lines in Victoria and related to a Cambrian accretionary setting and adjacent foreland; (iv) the present-day upper crustal configuration is largely the result of contractional fault reactivation, with significant vertical movements during the Kanimblan-Alice Springs Orogeny (~ 360 Ma - 340 Ma); (v) a large area of prospective rocks for mineral deposits with Cambrian arc-affiliation are accessible to exploration under shallow cover of the Murray Basin (often less than 200 m).</div><div> </div><div><strong>Citation: </strong>Doublier M.P., et al., 2024. Crustal architecture along seismic line 22GA-CD2: new insights from the Darling-Curnamona-Delamerian deep seismic reflection survey. In: Czarnota, K. (ed.) Exploring for the Future: Extended Abstracts, Geoscience Australia, Canberra, https://dx.doi.org/10.26186/149658</div>
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document
eCat Id
149658
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Keywords
- ( Project )
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- Darling-Curnamona-Delamerian
- ( Project )
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- EFTF – Exploring for the Future
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- reflection seismic
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- Delamerian
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- crustal architecture
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- Darling Basin
- theme.ANZRC Fields of Research.rdf
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- Seismology and seismic explorationStructural geology and tectonics
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- Published_External
Publication Date
2024-08-11T22:56:47
Creation Date
2024-06-15T08:00:00
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EFTF abstract showing the interpretation of deep seismic reflection line 22GA-CD2.
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asNeeded
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geoscientificInformation
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EFTF Extended Abstract
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<div> This publication was produced as part of Geoscience Australia's Exploring for the Future Program. It was presented at the Exploring for the Future 2024 Showcase.</div><div> </div>
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[-38, -28, 140, 154]
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