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

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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Date (Publication)
2002-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/41516

Citation identifier
Digital Object Identifier/http://dx.doi.org/10.1016/j.tecto.2004.04.032

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Role Organisation / Individual Name Details
Publisher

Tectonophysics

 Canberra
Author

Goleby, B.R.

 1
Author

Blewett, R.S.

 2
Author

Champion, D.C.

 3
Author

Jones, L.E.A.

 4
Author

Groenewald, P.B.

 5
Author

Cassidy, K.F.

 6
Author

Korsch, R.J.

 7
Author

Bell, B.

 8
Author

Whitaker, A.J.

 9
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ED
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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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  • Geoscientific information

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W


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Unknown
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  • External Publication

  • Abstract

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  • seismics

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  • AU-WA

Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

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  • Published_External

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Creative Commons Attribution 4.0 International Licence

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CC-BY

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4.0

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http://creativecommons.org/licenses/

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Australian Government Security ClassificationSystem

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2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

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Unclassified
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English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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Non geographic dataset
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Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/a05f7892-8b81-7506-e044-00144fdd4fa6

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GeoNetwork UUID

Language
English
Character encoding
UTF8
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Commonwealth of Australia (Geoscience Australia)

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Document
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nonGeographicDataset

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Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/41516

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/a05f7892-8b81-7506-e044-00144fdd4fa6

Date info (Revision)
2018-04-22T08:52:42
Date info (Creation)
2002-10-29T00:00:00

Metadata standard

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

 
 

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N
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E
W


Keywords

seismics

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