Citation

O'Brien, G.W., 1994. Cruise Proposal : Otway Basin, South-eastern Australia : Deep Crustal Seismic Data Acquisition, Late 1994/Early 1995 Project. Record  1994/061. Australian Geological Survey Organisation, Canberra.

Abstract

It is proposed to acquire up to approximately 4000 km of deep crustal seismic data across the offshore Otway Basin in the period from early December 1994 to late January 1995. The principal goals of the survey (AGSO Survey 137) are to determine the deep crustal architecture of the offshore Otway Basin, to characterise the linkages between the Otway Basin and the flanking Bass Basin, Kanmantoo High and oceanic crust, and thereby to characterise the large scale extensional processes which led to the development of the Otway Basin as part of the larger Southern Rift System. In addition, the survey is designed to test many of the newer concepts which have arisen from the interpretation of AGSO's recently acquired aeromagnetic data. The integration of the deep crustal seismic and the aeromagnetic data sets should significantly enhance our understanding of the basin architecture, as well as provide new insights into the usefulness of high resolution aeromagnetic data in sedimentary basins. In order to constrain crustal velocities, seismic refraction data will be recorded on key lines. In line with recent AGSO deep-seismic surveys, the Otway Basin survey will use a 4800 m streamer, configured with 192 x 25 m active groups; data will be recorded with a 16 second record length, and a 2 millisecond sample interval; the seismic source will be tuned airgun arrays with a total capacity of 49 litres, and will be fired every 50 metres to give 48-fold CDP coverage. Navigation will be by differential GPS. Using these parameters on the North West Shelf and in the Gippsland Basin, AGSO has consistently obtained high-quality deep seismic data, with interpretable reflectors down to 8-12 s 'FWT, as well as obtaining good resolution in the upper 6 s of seismic data, which is normally the limit recorded by industry.
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Product Type/Sub Type

nonGeographicDataset - GA Publication - Record

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1994

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Record
seismics
marine survey
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Lineage

Legacy product, lineage not available

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

a05f7892-7442-7506-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

1996-10-30

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