Course Module: 19 – Residualization

In general, the term “residual” refers to a quantity left over at the end of a process or in scientific terms the difference between an observed field and a calculated field. To geologists and geophysicists “residualization” known as “Regional-Residual Separation” is the process of generating a residual anomaly field from an observed field by removing a regional field. This residual map usually reveals previously hidden subtle features in the data. The map is considered to be a key element for an interpreter whose endeavor is to find and decipher local features which could be anomalies of exploration significance.

Learning Objectives
After completing this Module, you will be able to:

  • Describe what residual maps are.
  • Learn how to generate a residual map.
  • Explain how residual maps are used
  • Isolate anomaly zones of interest
  • Delineate shallow geological features.
  • Isolate geological targets and anomalies of interest.
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