Cover thickness estimates in the Coompana Province, South Australia Results from the pre-drilling geophysics program—reflection, refraction and surface wave seismic

The Coompana Project is a collaborative project between Geoscience Australia and the Geological Survey of South Australia, co-funded by Geoscience Australia’s Exploring for the Future Programme and the South Australian Government’s PACE Copper Initiative. The Coompana Project aims to provide new precompetitive geological, geophysical and geochemical data in the under-explored Coompana Province in South Australia. The pre-drilling geophysics program was undertaken to assist the drilling process by reducing the uncertainty associated with intersecting the targeted stratigraphy.


Seismic data were acquired at eight proposed drilling sites for the Coompana Drilling Program in February 2017. Seismic data were collected using vertical and horizontal geophones. An accelerated weight-drop source was tested with metal and plastic strike plates. The plastic strike plate was preferred and used for all sites. P-wave reflection images were used to images subsurface layers and estimate bedrock depth at each drill site. Horizontal geophone data indicated S-wave data had higher resolution than the vertical geophone P-wave data, but initial testing did not provide good bedrock imaging.


Fan shots can indicate zones of low velocity weathering at the near surface. Multichannel Analysis of Surface Waves provided near surface weathering profiles. Near surface weathering can be an indication of caves in this limestone environment. The S-wave shot records may indicate the presence of caves with S-wave signal degradation at cave locations, as S-waves do not travel through voids, not noticed at these sites.


The seismic reflection method can be used to show subsurface variations and provide bedrock depth estimates, though the bedrock can be difficult to identify. The data is very noisy and data quality changes at different locations. Seismic data quality can be improved with a higher energy source.

Simple

Identification info

Date (Creation)
2017-11-10T00:00:00
Date (Publication)
2018-05-31T04:00:21
Date (Revision)
2018-05-31T05:17:26
Date (Revision)
2019-04-09T01:08:55
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/115081

Citation identifier
Digital Object Identifier/http://dx.doi.org/10.11636/Record.2018.014

Cited responsible party
Role Organisation / Individual Name Details
Author

Holzschuh, J.
Co-author

McAlpine, S.R.B.
Co-author

Nicholl, M.
Co-author

Geological Survey of South Australia
Co-author

Geological Survey of South Australia
Co-author

Geological Survey of South Australia
Purpose

Accelerated weight drop seismic reflection data were used to image the subsurface to assist the drilling program. Cave identification is attempted.

Status
Point of contact
Role Organisation / Individual Name Details
Point of contact

Holzschuh, J.
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Spatial representation type
Grid
Topic category
  • Geoscientific information

Extent

Temporal extent

Time period
2017-02-20 2017-10-17

Extent

N
S
E
W


Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Theme

  • seismic reflection

Theme

  • S-wave

Theme

  • P-Wave

Theme

  • MASW

Theme

  • cavity detection

Theme

  • depth to bedrock

Theme

  • Coompana Province, South Australia

Theme

  • subsurface imaging

Theme

  • fan shooting

Theme

  • seismic data acquisition

Theme

  • seismic data processing

Theme

  • carbonates

Theme

  • limestone

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice
OnLine resource

Download the Record (docx)

Download the Record (docx)

Distribution format

  • docx

OnLine resource

Download the Record (pdf)

Download the Record (pdf)

Distribution format

  • pdf

OnLine resource

Related product: Cover thickness estimates in the Coompana Province, South Australia: Results from the pre-drilling geophysics program – Reflection seismic

Related product: Cover thickness estimates in the Coompana Province, South Australia: Results from the pre-drilling geophysics program – Reflection seismic

Resource lineage

Statement

Seismic data were acquired at eight proposed drilling sites for the Coompana Drilling Program in February 2017. Seismic data were collected using vertical and horizontal geophones. An accelerated weight-drop source was tested with metal and plastic strike plates and plastic plate preferred. Data were processed from March to May 2017. P-wave reflection imaged subsurface layers and depth converted images were used to approximate depth to bedrock. Fan shots, MASW models and S-wave data were examined to identify subsurface caves if they exist.

Hierarchy level
Document

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/7033df33-cf31-49b4-8fe6-f21c97fd35de

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Custodian

Holzschuh, J.

Commonwealth of Australia (Geoscience Australia)

 Voice
Resource provider

RD

Type of resource

Resource scope
Document
Name

GA publication: Record

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/115081

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/7033df33-cf31-49b4-8fe6-f21c97fd35de

Date info (Creation)
2017-11-10T00:25:24
Date info (Revision)
2018-05-31T05:17:16

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Edition date
2015-07-01T00:00:00
Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Coompana Province, South Australia MASW P-Wave S-wave carbonates cavity detection depth to bedrock fan shooting limestone seismic data acquisition seismic data processing seismic reflection subsurface imaging

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