Citation

Petkovic, P., 2003. Time-depth functions for the Great Australian Bight Basins. Record  2004/001. Geoscience Australia, Canberra.

Abstract

The seismic stacking velocity data in the Great Australian Bight are a useful dataset for calculating depths and sediment thicknesses. This work presents time-depth relationships computed from an unfiltered stacking velocity database and compares these with depths from sonobuoy P-wave velocities and exploration well sonic logs. The comparison suggests that a total sediment thickness over-estimate for the Ceduna Sub-basin of about 15% can be expected from the depths derived from stacking velocities. On the other hand, for sediment thickness calculations down to ~4 s two-way travel time below sea floor, stacking velocity data give comparable depths to those obtained from the wells' sonic logs. A piece-wise formula is offered which scales the time-depth function for the Ceduna Sub-basin in order to compensate for the depth overestimate inherent in using stacking velocities to calculate total sediment thickness. Megasequence boundary depths are calculated for the Ceduna Terrace to further illustrate data quality.
Google map showing geographic bounding box with values North bound -31.0 East bound 135.0 West bound 125.0 South bound -37.0
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Product Type/Sub Type

dataset - GA Publication - Record

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2003

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Record
geoscience databases
sedimentary basins
seismics
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-31.0
East bound
135.0
West bound
125.0
South bound
-37.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-b8d3-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2003-06-12

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays