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| Titel |
Moho Depth of The South China Sea Basin from Three-dimensional gravity inversion with control points and its characteristic |
| VerfasserIn |
Wu Zhaocai, Jinyao Gao, Ding Weiwei |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250140105
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| Publikation (Nr.) |
 EGU/EGU2017-3449.pdf |
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| Zusammenfassung |
| We calculate the gravity anomaly due to lateral changes in bathymetry from an independent
topography compilation, and the gravity anomaly due to changes in sediment thickness and
density. They are subtracted from the free air gravity anomaly to obtain the initial mantle
residual anomaly. We typically use the wavenumber domain method described by
Oldenburg (1974) to calculate the topography of the Moho surface from the mantle
residual gravity anomaly, and estimate the lithosphere thinning factor from the crustal
thickness prediction. We then calculate the temperature field (McKenzie, 1978)
and the initial lithosphere thermal gravity anomaly, which we subtract from the
mantle residual gravity anomaly. The inversion is subsequently a recursive cycle of
inverting for Moho depth, calculating the lithosphere thermal gravity anomaly and
updating the mantle residual gravity anomaly until convergence is achieved (Figure
1).
PIC |
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