A qualitative geologic interpretation of the regional structural framework for a lightly-explored area can be developed very economically through use of public domain data. This concept is especially valid for any offshore area because they are all covered by readily available world-wide satellite-derived gravity data bases. By comparing and integrating satellite-derived gravity with other public source or published geology or geophysics, it is possible to detect regional structural patterns and to extend or extrapolate them into adjacent areas. Examples of useful public data include published bathymetry, refraction seismic, marine- or airborne magnetic data, DEM (digital elevation) data, surface geology maps and published geologic cross sections. A regional study of Gabon using these concepts provides an example of what can be accomplished.

Learning Objectives

After completing this unit, you will:

  • Understand the inherent benefits gained by integrating various types of geophysical and geological data.
  • Know the types of public-source or commercial data are available and where to find them.
  • Coverage and quality limitations of public-source data.
  • Suitable gridding, enhancement, and interpretation techniques based on data quality.
  • Be able to better relate this subject with Modules: #4 (Gravity, Magnetics, and Gradiometer Survey Overview) ,# 9-13 (Signatures), #18 (Data Enhancement Techniques), #31 (Gravity Depth Estimates) and #36 (Moho)