Teleseismic travel time anomalies and crustal structure in central Australia

Details Teleseismic travel time anomalies and crustal structure in central Australia Teleseismic travel time anomalies and crustal structure in central Australia

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pepi...34...46l&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 34, Issue 1-2, p. 46-56.

Physics

14

Scientific paper

Teleseismic P-wave travel time anomalies of more than 0.5s have been recorded in central Australia between sites separated by less than 100 km. Late arrivals occur at sites that are located within sedimentary basins and early arrivals occur at sites located on the exposed and eroded basement. Early arrivals correspond to relative gravity highs and late arrivals correspond to gravity lows. The differential travel times cannot be attributed to near surface crustal structure alone. The most straightforward interpretation is in terms of a Moho whose depth varies by about +/- 10 km from a mean value and which is deepest below the basins. This interpretation is consistent with the intracratonic basin evolution model proposed by Lambeck.

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