Please use this identifier to cite or link to this item:
Title: The Analytic Signal and Cross-Correlation Applied in Rapid, Detailed Analysis of Aeromagnetic and Radiometric Data
Contributor(s): Cobine, Trevor James (author); Acton, Gary (supervisor); Flood, Peter (supervisor)
Conferred Date: 1998
Copyright Date: 1996
Open Access: Yes
Handle Link:
Abstract: The analytic signal, which is derived from two-dimensional magnetic data sets, can be used to map magnetic boundaries or changes in susceptibility. As air-rock boundaries in steep terrains represent a change in susceptibility, there is an ambiguity between terrain and geology. This was evident in the trace of the analytic signal for the Goonaloom Creek area and the ambiguity could not be resolved satisfactorily by comparison of the analytic signal trace and the known geology. When applied to a small scale, high definition aeromagnetic data set, the analytic signal trace was fragmented by grid corrugation. The Laplacian convolution filter suggested by McLeod et al., (1993), accentuated the noise artifacts. The application of the analytic signal to the mid-latitude data of this project gave no advantages over reduce-to-pole methods, although this may not be the case at low magnetic latitudes. Cross-correlation in the Fourier plane is defined as the multiplication of one transformed signal by the complex conjugate of the second transformed signal. In a commercial image processing package such as ER Mapper, cross correlation is easily implemented. Cross-correlation of the total magnetic intensity and potassium-40 counts is useful in targeting areas of where hydrothermal activity has occurred. In the case of the Goonaloom Creek survey, the correlation anomaly can be interpreted as porphyry mineralization zoning under the Lowell and Guilbert (1970) model. This may also be the case for an area two kilometres south of Mt. Hastings mine west of Biggenden, Queensland. The cross-correlation of the first vertical derivative of the total magnetic field intensity and potassium-40 defines areas of possible structurally-controlled, near-surface mineralization.
Publication Type: Thesis Masters Research
Rights Statement: Copyright 1996 - Trevor James Cobine
HERDC Category Description: T1 Thesis - Masters Degree by Research
Statistics to Oct 2018: Visitors: 242
Views: 233
Downloads: 25
Appears in Collections:Thesis Masters Research

Files in This Item:
11 files
File Description SizeFormat 
open/SOURCE05.pdfThesis, part 33.17 MBAdobe PDF
Download Adobe
open/SOURCE06.pdfThesis, part 46.73 MBAdobe PDF
Download Adobe
open/SOURCE03.pdfThesis, part 13.06 MBAdobe PDF
Download Adobe
open/SOURCE07.pdfThesis, part 52.94 MBAdobe PDF
Download Adobe
open/SOURCE02.pdfAbstract459.65 kBAdobe PDF
Download Adobe
open/SOURCE04.pdfThesis, part 23.31 MBAdobe PDF
Download Adobe
1 2 Next
Show full item record

Page view(s)

checked on Feb 6, 2019


checked on Feb 6, 2019
Google Media

Google ScholarTM


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.