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Crustal structure studies in Tasmania

Johnson, Bruce David 1972 , 'Crustal structure studies in Tasmania', PhD thesis, University of Tasmania.

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A regional gravity survey of Tasmania has revealed that the crust is of normal continental thickness (35 to 40 kms), increasing slightly under the Central Plateau region and thinning rapidly at the continental margin. The "regional" field, due to the variation in crustal thickness, has been obtained by approximating the observed data, using a terminated Fourier series; the trigonometric functions having been orthogonalised, with respect to the irregularly spaced data points, by the Gram-Schmidt method. A time-term analysis of the Bass Strait crustal refraction data indicates near normal thicknesses in Tasmania and intermediate thicknesses in Bass Strait (23-28 kms). Spectral analyses of high-level aeromagnetic data have indicated that, if the source layers of magnetic anomalies can be considered to give rise to a "white" spectrum, then the depth to the source layer is given by the gradient of the logarithm of the spectrum.

Item Type: Thesis - PhD
Authors/Creators:Johnson, Bruce David
Keywords: Geology
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Copyright 1972 the Author - The University is continuing to endeavour to trace the copyright
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Thesis (Ph.D.) - University of Tasmania, 1972. Includes bibliography

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