Defining major structures and their depth extent under cover in the southern Thomson Orogen, New South Wales

Rosemary Hegarty; Michael Doublier

doi:10.1071/ASEG2015ab199

24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery

ISSN: 2202-0586
E-ISSN:

oa Defining major structures and their depth extent under cover in the southern Thomson Orogen, New South Wales
Authors Rosemary Hegarty^a and Michael Doublier^b
View Affiliations Hide Affiliations

^a Geological Survey of New South Wales, 516 High Street Maitland, NSW, 2320, [email protected] ^b Geoscience Australia, Hindmarsh Drive Symonston, ACT, 2609, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2015, Issue 24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery, Dec 2015, p. 1 - 5
DOI: https://doi.org/10.1071/ASEG2015ab199
- Published online: 01 Dec 2015

Abstract

Regional geophysical datasets are critical to the task of uncovering the basement geology of the southern Thomson Orogen in far western New South Wales. As part of a National Collaborative Framework project, aeromagnetic, gravity and seismic data have being processed and interpreted to construct the structural framework. Subdivision into structural domains has been validated and constrained by geological information, relying on observations and measurements from sparse drill holes and outcrops.

Boundaries between structural domains are complex and poorly understood. This study aimed to recognise major faults and, where possible, define their displacements, depth extent, and understand their dynamics and timing. Analysis of available company and government seismic surveys provided details for some of the major fault systems such as the Olepoloko Fault, Culgoa Lineament, and also for many newly recognised fault trends

The seismic interpretations were reconciled with deep sourced aeromagnetic and gravity gradients that were enhanced by multiscale edge analysis. The structural framework will underpin geochronology and mineral systems studies as the Southern Thomson Orogen project continues.

Article metrics loading...

/content/journals/10.1071/ASEG2015ab199

2015-12-01

2026-01-13

From This Site

/content/journals/10.1071/ASEG2015ab199

dcterms_title,dcterms_subject,pub_keyword

-contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution

10

5

Full text loading...

References

Burton, G.R., 2010, New structural model to explain geophysical features in northwestern New South Wales: implications for the tectonic framework of the Tasmanides. Australian Journal of Earth Sciences 57, 23-49.
Burton, G.R., Trigg, S.J. and Campbell L.M., 2012, Sussex and Byrock 1:100 000 geological sheets 8135 and 8136. Explanatory notes. Geological Survey of New South Wales, Maitland, NSW.
Esso Mineral Company of Australia, 1965, Exploration of an aeromagnetic anomaly on Authority to prospect 2547, New South Wales. Report File GS1965/063. Geological Survey of New South Wales, Maitland, NSW.
Gilmore, P.J., Trigg, S.J. and Campbell, L.M., 2014 (in prep), Mount Oxley 1:100 000 geological sheet 8137, Explanatory notes. Geological Survey of New South Wales, Maitland, NSW.
Greenfield, J., Gilmore, P.J. and Mills, K.J. (compilers), 2010, Explanatory notes for the Koonenberry Belt geological maps. Geological Survey of New South Wales, Bulletin 35.
Glen, R.A., Korsch, R.J., Hegarty, R.A., Saeed, A., Poudjom Djomani, Y., Costelloe, R.D. and Belousova, E., 2013, Geodynamic significance of the boundary between the Thomson Orogen and the Lachlan Orogen, northwestern New South Wales and implications for Tasmanides tectonics, Australian Journal of Earth Sciences, 60:3, 371-412.
Hegarty, R.A., 2010, Preliminary geophysical-geological interpretation of the Thomson Orogen, release of provisional and preliminary Information on DVD June 2009. Geological Survey of New Souh Wales, Maitland.

/content/journals/10.1071/ASEG2015ab199

Article Type: Research Article

Keyword(s): aeromagnetic data; geophysical interpretation; gravity data; multiscale edge gradients; seismic data; Thomson Orogen

Most Cited This Month Most Cited RSS feed

- Inversion of data from electrical imaging surveys in water-covered areas
  
  Authors M. H. Loke and J. W. Lane
- Inversion of Magnetic Data from Remanent and Induced Sources
  
  Authors Robert G. Elllis, Barrry de Wet and Ian N. Macleod
- A comparison of smooth and blocky inversion methods in 2-D electrical imaging surveys
  
  Authors M. H. Loke, Ian Acworth and Torleif Dahlin
- Designing matched bandpass and azimuthal filters for the separation of potential-field anomalies by source region and source type
  
  Authors Jeffrey D. Phillips
- Bad Colour Maps Hide Big Features and Create False Anomalies
  
  Authors Peter Kovesi
- Practical 3D EM inversion – the P223F software suite
  
  Authors Art Raiche, Fred Sugeng and Glenn Wilson
- Estimating Noise Levels in AEM Data
  
  Authors Andy Green and Richard Lane
- Target delineation using Full Tensor Gravity Gradiometry data
  
  Authors Colm A. Murphy and James Brewster
- Transdimensional Monte Carlo Inversion of AEM Data
  
  Authors Ross C Brodie and Malcolm Sambridge
- The geotech VTEM time domain helicopter em system
  
  Authors Ken Witherly, Richard Irvine and Edward Morrison
More Less

oa Defining major structures and their depth extent under cover in the southern Thomson Orogen, New South Wales

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed