Abstract

The configuration of earthquakes around Australia enables these natural events to be used as probes into the seismic structure of the upper mantle. For the region below northern Australia, the combination of short-period and broad-band observations has enabled the construction of radial velocity profiles for P and S velocities and attenuation. There is a range of evidence for lateral variations in seismic velocity in the lithosphere and the upper mantle transition zone. The lateral variations in structure can be investigated directly by a number of techniques, including the analysis of travel-time residuals and waveform inversion, especially for surface waves. Line profiles have revealed strong contrasts in P velocities across the shield edge in southeastern Australia. Broader scale P wave tomography has extended the definition of three-dimensional structure, especially in the northern part of the continent. Surface wave studies have begun to reveal the three-dimensional variations in shear wave structure beneath the continent by exploiting the records from portable broad-band stations. These results show that some of the contrasts in surface geology between Precambrian and Phanerozoic outcrop are reflected in depth; some structures extend to depths of 200 km or more, e.g. the Mt Isa Block and the New England Block.
Google map showing geographic bounding box with values North bound East bound West bound South bound
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Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1997-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

81477 Product http://www.ga.gov.au/metadata-gateway/metadata/record/81477/

Keywords

GA Publication
Journal
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

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

Source Description

Source data not available.

Metadata File Identifier

fae9173a-71a2-71e4-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 SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
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