Product catalogue
3-D seismic reflector orientations from 2-D lines across the Kalgoorlie Goldfields
<div>Conference abstract on seismic reflector orientation analysis from the Yilgarn Craton (Western Australia):</div>
Interpretation of seismic data in hard rock areas is challenging due to lack of direct geological constraints from drilling and the more limited data available typically available from sparse 2-D profiles in comparison to hydrocarbon exploration surveys. Estimates of the 3D orientation of reflectors can help associate specific reflections, or regions of the crust, with geological structures mapped at the surface whose orientation and tectonic history are known. Here we present a method analogous to semblance velocity analysis that utilizes varying source-receiver azimuths to derive continuous estimates of 3-D reflector orientations along onshore 2-D reflection profiles. For each zero-offset time within a common depth point supergather, the semblance is calculated along 3-D travel time curves, and the dip and strike of the most coherent reflection is determined. Relative errors in these angles are derived from the range of travel time curves that have semblance values greater than a specified fraction, for example 90%, of the maximum. The potential of the method is illustrated using a section from line 10GA-YU1 from the Youanmi Terrane of the Yilgarn Craton in Australia in which the original field data have been replaced with synthetic in-line and cross-line reflections. Reflector orientations are generally well recovered where the range of available source-receiver azimuths is greater than 20o, but the method fails at lower ranges where the seismic line is almost linear, a behavior that is also observed in analysis of field data. When this approach is applied to data from the 2019 seismic survey around Kalgoorlie in the Eastern Goldfields, the orientations of both moderately dipping volcanic stratigraphy and faults are recovered. Integration of these local orientation attributes into an interpretation of migrated seismic data requires that the orientations also be migrated. We use a simple approach to the 2-D migration of these attributes that utilises the apparent dip of reflections on the unmigrated stack, and maps reflector strike, for example, to a short linear segment depending on its original position and a migration velocity. Deployment of off-line receivers during future seismic acquisition will allow the recording of a larger range of source-receiver azimuths that can produce more reliable estimates of these reflector attributes than is possible with the limited range of azimuths available from standard 2-D crooked-line acquisition.
This Abstract was submitted/presented to the Target 2023 Conference 28 July ( https://6ias.org/target2023/)
Simple
Identification info
- Date (Creation)
- 2023-02-04T07:00:00
- Date (Publication)
- 2023-09-11T04:51:45
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/147680
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Calvert, A.J.
External Contact Author Doublier, M.
Internal Contact
- Name
-
Target 2023 28 July 2023 Fremantle Perth WA
- Purpose
-
Conference abstract to accompany poster presentation.
- Status
- Completed
- Point of contact
-
Role Organisation / Individual Name Details Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Doublier, M.
Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- 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
- Keywords
-
-
Reflection Seismic
-
- Keywords
-
-
Yilgarn
-
- Keywords
-
-
seismic interpretation
-
- theme.ANZRC Fields of Research.rdf
-
-
Seismology and Seismic Exploration
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution-NonCommercial 4.0 International Licence
- Alternate title
-
CC-BY-NC
- Edition
-
4.0
- Addressee
-
Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
-
© Commonwealth of Australia (Geoscience Australia) 2023
Resource constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
-
Australian Government Security Classification System
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
-
Link to Conference Page
Link to Conference Page
- Distribution format
-
- OnLine resource
-
Link to Abstract Volume
Link to Abstract Volume
- Distribution format
-
Resource lineage
- Statement
-
<div>This is a conference abstract for the Target 2023 workshop which is affiliated with the 6th International Archean Symposium (Perth, July 2023) </div>
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/8b94bb78-5caa-4cec-b109-0afb47a57c18
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Doublier, M.
Internal Contact
Type of resource
- Resource scope
- Document
- Name
-
Conference Abstract
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/147680
- Date info (Creation)
- 2023-09-11T03:57:04
- Date info (Revision)
- 2023-09-11T03:57:04
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, September 2018
- Citation identifier
- http://pid.geoscience.gov.au/dataset/ga/122551