Authors / CoAuthors
Meixner, A.J. | Vandenberg, L.C.
Abstract
The Tanami region of the Northern Territory lies approximately 600 km north-west of Alice Springs and is a major Australian gold province. A thin veneer of Cainozoic sand and gravel largely obscures basement host rocks, posing considerable challenges to mineral explorers looking for buried deposits. Recent multi-disciplinary investigations rely on the integration of geophysical data with more traditional field techniques to map sub-surface structure, stratigraphy and identify potential mineralised targets (Hendrickx et al., 2000a,b, Crispe and Vandenberg, in prep). While two dimensional (2-D) mapping of the subsurface has been relatively straightforward, three dimensional (3-D) reconstruction of the regional structure and stratigraphic architecture is more difficult given the lack of continuous exposure and vast distances between outcrops. In this study 19 2-D geological cross-sections were tested via ModelVision, a 21/2-D potential field modelling package, to a depth of 15 km. Sections were revised and remodelled till geological relationships and geometries across serial sections approached a reasonable level of consistency. The modelled sections were then captured in GOCAD, a 3-D earth modelling system. This enabled the interpolation of fault surfaces, major contacts and granitic bodies to produce a 3-D geological model (Fig. 1). The modelled sections, surfaces and other data sets were then combined in Virtual Reality Modelling Language (VRML) to create 3-D views of the geology (Vandenberg and Meixner, 2004). The resulting model provides a 3-D framework in which various data sets and interpretations can be visualised and compared. The model can evolve as new data is incorporated, and provides a base for the construction of further tests to refine our understanding of the geology and associated mineral systems.
Product Type
nonGeographicDataset
eCat Id
61355
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- External PublicationConference Paper
- ( Theme )
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- magnetics
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- gravity
- ( Theme )
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- structural geology
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- AU-NTAU-WA
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2004-01-01T00:00:00
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geoscientificInformation
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[-22.0, -18.0, 128.0, 132.0]
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