Authors / CoAuthors
Clark, D.J. | Leonard, M.
Abstract
Stress Tensor reconstructions are presented for seven domains withinthe Australian crust based on formal inversion of four or more earthquake focal mechanisms in close geographic proximity. The data for inversion was sourced from a set of sixty-nine quality-ranked focal mechanisms forming part of the recently compiled AGSO focal mechanism database. When analysed in conjunction with in situ stress data held by the Australian Stress Map project, the new data makes possible for the first time a rigorous comparison of the Australian continental stress field at near-surface and seismogenic depths. A more complete picture of the character of the Australian intraplate stress field is thereby made available. The tensor data agrees well with in situ determinations in western, northern and far southeastern Australia suggesting that the continental stress field is homogeneous between shallow and seismogenic depth in these areas. Plate boundary forces are considered to be the dominant source of stress. In contrast, the results for the Sydney Basin and Flinders Ranges imply significant heterogeneity and influence by more localised sources of stress.
Product Type
nonGeographicDataset
eCat Id
37173
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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2601
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Keywords
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- External PublicationScientific Journal Paper
- ( Theme )
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- earthquakes
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- AU
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2001-01-01T00:00:00
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geoscientificInformation
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[-45, -5, 105, 155]
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