Authors / CoAuthors
Dooley, J.C.
Abstract
In the vicinity of Roma about 3000-4000ft. of Mesozoic sediments overlie a basement consisting or granite and -metamorphic rocks. Permian rocks outcrop about 70 miles to the north of Roma. Considerable flows of natural gas, and small quantities of oil, have been found since 1900 in many of the bores which have been drilled in the Roma area; but no major commercial supplies have been developed. The sediments are mostly obscured by soil. Experience also suggests that pitting and shallow core drilling have limited value. It is therefore difficult, using normal geological methods, to determine geological structures in the region and to work out, except in the broadest way, the geological structure in the areas tested by drilling. In the present survey, gravity and magnetic methods were applied in an attempt to gain some indications of basement topography, which might be related to possible oil-bearing structures. It was found that the major geophysical anomalies are not related to known basement topography, but are probably due to variations of rock-types within the basement or other causes. However, it was possible to isolate some- gravity anomalies which might be related to high basement features. These anomalies are being tested by seismic methods to locate possible drilling targets.
Product Type
document
eCat Id
211
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GA PublicationBulletin
- ( Theme )
-
- gravity
- ( Theme )
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- magnetics
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- AU-QLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1950-01-01T00:00:00
Creation Date
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Purpose
Maintenance Information
unknown
Topic Category
geoscientificInformation
Series Information
Bulletin 018
Lineage
Unknown
Parent Information
Extents
[-27.0, -26.0, 148.5, 150.0]
Reference System
Spatial Resolution
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Associations
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Source data not available.