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Sedimentary and upper crustal structure of Australia from receiver functions

Australian Journal of Earth Sciences

By:
, , and
DOI: 10.1046/j.1440-0952.2000.00774.x

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Abstract

The initial coda of teleseismic P-waves contains considerable information about the crust and upper mantle structure directly beneath a receiver. When this information can be recovered for a dense network of seismographs much can be learned about the structure of the earth. Data from the high quality broadband seismic stations of the SKIPPY and KIMBA projects along with permanent stations are used to investigate the upper crustal structure of Australia. A dataset of 65 shear-velocity models derived from receiver functions has enabled the sedimentary and upper crustal structure of Australia to be summarised. Regions of thick soft sediment show good agreement with topographical lows. A simple relation between upper-crustal velocity and magnetisation, as has been suggested by other investigators, has not been observed, but this may be due to the magnetic signal being muted by overlying sediments. A prominent mid-crustal discontinuity is apparent in the Tasman and New England mega-elements. This may represent a mid-crustal decollement that had structural control during accretion.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Sedimentary and upper crustal structure of Australia from receiver functions
Series title:
Australian Journal of Earth Sciences
DOI:
10.1046/j.1440-0952.2000.00774.x
Volume
47
Issue:
2
Year Published:
2000
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Australian Journal of Earth Sciences
First page:
209
Last page:
216
Number of Pages:
8