A deep crustal model to explain regional aeromagnetic and gravity anomalies in southwest England

Autor:	M. Brooks, Fitian R. Al-Rawi
Rok vydání:	1992
Předmět:	Paleontology Geophysics Gravitational field Anomaly (natural sciences) Trend surface analysis Upward continuation Crust Geology Gravity anomaly Earth-Surface Processes
Zdroj:	Tectonophysics. 212:109-115
ISSN:	0040-1951
DOI:	10.1016/0040-1951(92)90143-t
Popis:	Regional aeromagnetic anomaly maps of southwest England produced by upward continuation, trend surface analysis and low-pass wavenumber filtering of the published aeromagnetic map show a pronounced gradient zone of an east-west trend crossing central Devon. Across a 60-km-wide zone, regional field values reduce southwards by about 150 nT. This gradient zone can be modelled as the edge effect of a 6-km-thick permanently magnetised layer at the base of the crust. A dense layer of similar geometry can explain the high regional gravity field that characterises southwest England.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::624bb36b1684f166a4551ba6826c9437 https://doi.org/10.1016/0040-1951(92)90143-t Zobrazit plný text záznamu