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- W4253746985 abstract "Depth to the top or base of a small magnetic source body cannot be reliably determined from single profile measurements of any one magnetic field parameter. However simultaneous measurement of transverse horizontal gradients or the magnetic gradient tensor allows estimation of any offset of the source from the profile and this substantially improves the ability to interpret sparsely sampled anomalies. Surveys at low elevations improve resolution of detail and detection of weak magnetizations but the measured anomalies are dominated by the topmost section of the source bodies thereby reducing sensitivity to their base depths. Aeromagnetic surveys flown to help resolve structure of the Edwards Aquifer have discovered many Cretaceous intrusions but many of these anomalies are detected only on single profiles and depths to their top and base are poorly constrained. Models derived from inversion of the anomalies can however be used in the design of any follow‐up survey and to investigate the possible benefits of transverse gradient or gradient tensor measurements. Inversion of a multi‐line anomaly has resolved the source to be a steeply‐dipping sheet illustrating implications of the magnetic modeling to local groundwater flow models." @default.
- W4253746985 created "2022-05-12" @default.
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- W4253746985 date "2005-01-01" @default.
- W4253746985 modified "2023-10-18" @default.
- W4253746985 title "Estimating Source Depth Extent from Inversion of Magnetic Field Data — A Synthetic Modelling Study of the Cretaceous Volcanic Intrusions into the Edwards Aquifer, Texas" @default.
- W4253746985 doi "https://doi.org/10.4133/1.2923495" @default.
- W4253746985 hasPublicationYear "2005" @default.
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