An equivalent layer magnetization model for Australia based on Magsat data

Details An equivalent layer magnetization model for Australia based on Magsat data An equivalent layer magnetization model for Australia based on Magsat data

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..83..167m&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 83, no. 1-4, May 1987, p. 167-174. NASA-supported research.

Other

8

Australia, Magnetization, Magsat Satellites, Data Processing, Indian Ocean, Magnetic Anomalies, Pacific Ocean

Scientific paper

An equivalent layer magnetization model for Australia and adjacent oceanic areas is presented. The model is obtained by linear inversion of Magsat anomaly data measured in the altitude range 325-550 km. The anomaly data set has been isolated from the raw data set by use of models of the core field and very long wavelength external fields, and is internally consistent. Certain major structural features of the Australian continent are geographically associated with magnetization anomalies. A first-order difference is seen between the Tasman Zone and the Precambrian cratonic areas: magnetization anomalies are much more subdued in the former, possibly reflecting a shallowing of the Curie isotherm within the crust. A profile of the vertical integral of magnetization is presented for a crustal section extending from the Gawler Block to the southeast coast. It is shown that the magnetization variations are probably due partly, but not wholly, to depth to Curie isotherm variations; gross magnetization variations among at least three distinct crustal units must be involved.

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