The 2005 Tanami Seismic Collaborative Research Project: Seismic results

B.R. Goleby¹, P. Lyons¹, D.L. Huston¹, L. Vandenberg², B. Davies³, L. Bagas⁴, L.E.A. Jones¹, T. Smith⁵, M. Gebre-Mariam³, L. English⁵, M. Green⁵, R.J. Korsch¹, A. Crispe^2
1Geoscience Australia
²Northern Territory Geological Survey
³Newmont Exploration Pty Ltd
⁴Geological Survey of Western Australia
⁵Tanami Gold NL

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Introduction

The 2005 Tanami Seismic Collaborative Research Project produced four regional deep seismic reflection traverses, 05GA-T1 through 05GA-T4, totalling 724 line-km. Traverse 05GA-T1, a 354.3 km long northwest-southeast regional transect started in Western Australia and ended in the Northern Territory. It was located close to Tanami Gold’s Bald Hills deposits and Newmont’s Tanami and The Granites mine sites. This traverse provided cross-strike information on the geometry of the Coomarie and Frankania granite complexes as well as many of the region's fault systems. The traverse ended at the southern edge of the Willowra Gravity Ridge.

The cross-traverses, 05GA-T2 (101.8 km long), 05GA-T3 (179.2 km long) and 05GA-T4 (84.4 km long) provide orthogonal three-dimensional control on the geometry of the region's main fault systems.

The project objectives are to:

• Image the geometry of the main faults;
• Determine a deformation sequence for these faults;
• Identify any through-going crustal structures;
• Determine stratigraphic thicknesses of the Tanami Group and granite body geometries;
• Determine relationships of the various stratigraphic packages to controlling structures;
• Investigate the relationship of mineralised domains to crustal scale structures;
• Identify Archaean basement and its relationship to the overlying Tanami Group stratigraphy;
• Investigate the character of the Tanami-Arunta boundary.

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Related links

Evolution and metallogenesis of the North Australian Craton Conference Abstracts