Skip to Main Content
Book Chapter

Magnetic Frequency-depth Relationship

R.I. Gibson
R.I. Gibson
Search for other works by this author on:
January 01, 1998


Shallow density and susceptibility contrasts produce narrow, or high-frequency, anomalies, while deeper contrasts result in broader, low-frequency anomalies. We can use this characteristic of the gravity and magnetic fields to determine depths to sources, both qualitatively and quantitatively. Because gravity signatures come from everywhere, from the air to the Earth's core, such inferences are often not straightforward or reasonably unique. But most magnetic anomalies come from only a few rock types, such as volcanics, intrusives, and basement rocks. Magnetic data therefore can be used to estimate depth to basementa classic use for such data. The illustration shows how the anomalies change from narrow over shallow basement to broad over deeper basement.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables


Society of Exploration Geophysicists Geophysical References Series

Geologic Applications of Gravity and Magnetics: Case Histories

Richard I. Gibson
Richard I. Gibson
Search for other works by this author on:
Patrick S. Millegan
Patrick S. Millegan
Search for other works by this author on:
Society of Exploration Geophysicists
ISBN electronic:
Publication date:
January 01, 1998




A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now