Authors / CoAuthors
Polak, E.J. | Hill, P.
Abstract
At the request of the Australian Atomic Energy Commission, the Bureau of Mineral Resources, Geology & Geophysics conducted a seismic refraction survey on the site chosen for construction of a nuclear power station. The purpose of the survey was to determine the foundation conditions at the site and the properties of the rocks in relation to excavation methods and support of the proposed structures. The bedrock of the area consists of Permian sandstone (Jervis Bay Sandstone) overlain in places by unconsolidated Quaternary beach and dune sands. During the seismic work it was found that the sandstone beds have a relatively wide range of seismic velocities; often a higher-velocity bed overlies a lower-velocity bed, and this makes seismic refraction work difficult and less accurate. This is confirmed by laboratory measurements of seismic velocities on drill cores. Thin beds of higher- and lower-velocity sandstones occur, some too thin to be resolved by the seismic method. The seismic profiles presented must be considered bearing in mind these difficulties, Haterial sufficiently consolidated for foundations is shallow, and the seismic velocities indicate that some blasting will be necessary to excavate to the desired depth of 10 feet above mean high water level.
Product Type
dataset
eCat Id
76509
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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- Seismic Dataseismic survey
- ( Theme )
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- seismic refraction
- ( Theme )
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- seismic velocity
- ( Theme )
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- geophysics
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- AU-ACT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Seismology and Seismic Exploration
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- Published_External
Publication Date
1970-01-01T00:00:00
Creation Date
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Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Record
Lineage
The Australian Atomic Energy Commission (AAEC) proposes to construct a nUGlear power station at Jervis Bay, ACT, and the Electricity Commission of New South Wales has been entrusted with the site investigationo Investigations of the foundation conditions were made in 1969 and 19700 These consisted of diamond drilling by the Electricity Commission of NSW, a reconnaissance geophysical survey by the Engineering Geophysics Group of the Bureau of Mineral Resources (Taylor, 1969), and an offshore seismic sparker survey by the University of NSW (Carter et al., 1969). During this time two possible sites were investigated, but on the basis of the 1969 investigations the Murray Beach area was chosen as the site for the power station. Following this decision a detailed seismic refraqtion survey was made on the Mlurray Beach site by the Engineering Geophysics. Group of the Bureau of Hineral Resources between 12 January and 15 February 19700 The party consisted of: E.J. Polak and Po Hill, geophysicists; G. Jennings, technical officer; Ro Cherry and S. Hall, field assistants; and four field hands provided by the AAEC, which also carried out topographical surveying.
Parent Information
Extents
[-35.5, -35.0, 150.0, 151.0]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
Source data not available.