Authors / CoAuthors
Horvath, J.
Abstract
Results are given of a geophysical test survey made at three localities on the Newcastle coalfield in August, 1952, to determine whether intrusive doleritic dykes could be located by the magnetic method. Knowledge of the position of the dykes would assist in planning the lay-out of underground workings and of surface roads. The results showed only slight variations of the magnetic field, but some weak anomalies of less than 100 gammas were recorded. The position of these anomalies coincides with the inferred position of the basic dykes near the surface. The variation in the shape of anomalies suggests non-uniformity of the magnetic properties and shape of the dykes. The magnetic method might be helpful in determining the position and extent of the dykes beyond the areas where they are known, but supporting evidence from other geophysical methods such as the gravity of electric resistivity methods may be needed to verify the magnetic results.
Product Type
document
eCat Id
9273
Contact for the resource
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GA PublicationRecord
- ( Theme )
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- geophysics
- ( Theme )
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- geology
- ( Theme )
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- magnetics
- ( Theme )
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- mineral deposits
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- AU-NSW
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1953-01-01T00:00:00
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unknown
Topic Category
geoscientificInformation
Series Information
Record 1953/004
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Legacy product, lineage not available
Parent Information
Extents
[-33.2, -32.8, 151.5, 151.9]
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