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Deep Seismic Reflection Profiling in the NE Yilgarn: Imlications for the Yilgarn's Crustal Architecture and Mineral Potential

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Created 20/01/2025

Updated 20/01/2025

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Deep-seismic reflection data have provided information on the crustal architecture of several highly mineralised regions within the Archaean northeastern Yilgarn Craton, Western Australia. These seismic data are characterised by several prominent features and include 1) a change in the thickness of the crust across the northeastern Yilgarn Craton, 2) subdivision of the crust into three broad layers, 3) a prominent east dip to the majority of the reflections, and 4) the identification of three east-dipping crustal-penetrating shear zones. These east-dipping shear zones divide the region into four terranes and are surprisingly similar in geometry. In the hangingwalls of the shears, there is evidence of a marked increase in deformation adjacent to the shear zone. This region is underlain by another low-angle shear zone at depth. Major orogenic Au deposits in the northeastern Yilgarn are spatially associated with major structures. The Laverton Tectonic Zone, for example, is a highly mineralised corridor that contains several world-class Au deposits plus many other smaller deposits. Other non crustal-penetrating structures within the area do not appear to be as well endowed as the Laverton structure. We infer that the complex deformed region within the hangingwall and underlain by a low-angle shear zone forms a wedge-shaped trap with upward and/or sub-horizontal moving fluids being focused into the apex of the wedge.

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Title Deep Seismic Reflection Profiling in the NE Yilgarn: Imlications for the Yilgarn's Crustal Architecture and Mineral Potential
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/c8257408-4153-4562-a67d-a57ded26a329
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[121.0, -29.5], [125.5, -29.5], [125.5, -27.5], [121.0, -27.5], [121.0, -29.5]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Deep Seismic Reflection Profiling in the NE Yilgarn: Imlications for the Yilgarn's Crustal Architecture and Mineral Potential". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/deep-seismic-reflection-profiling-in-the-ne-yilgarn-imlications-for-the-yilgarns-crustal-archit

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