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Global Centroid Distribution of Magnetized Layer From World Digital Magnetic Anomaly Map

2017; Wiley; Volume: 36; Issue: 12 Linguagem: Inglês

10.1002/2017tc004770

1944-9194

Akiko Tanaka,

Geological and Geochemical Analysis

Global distribution of the centroid of magnetic layer, Z o , was estimated from spectral analysis of aeromagnetic and marine magnetic anomalies using recently released new global digital magnetic anomaly data, World Digital Magnetic Anomaly Map (WDMAM) version 2.0. Z o distribution provides a comprehensive view of regional‐scale trends of lithospheric thickness; Z o is generally shallower in oceanic ridges and deeper older continents, which is consistent with previous works. Z o is closely related to reasonable average thermal regime, and its correspondence with tectonic regime indicates that Z o is useful to delineate regional crustal thermal structure. It is expected that Z o combined with multidisciplinary data should help to infer geophysical and geological information in less explored regions.