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PDEPTH—A computer program for the geophysical interpretation of magnetic and gravity profiles through Fourier filtering, source-depth analysis, and forward modeling

Techniques and Methods 7-C17
Prepared in cooperation with the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office under Interagency Agreement number IAG DE-AI52-12NA30865/DE-NA0001654. The USGS does not provide technical support for the software associated with this publication.
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https://doi.org/10.3133/tm7C17

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Abstract

PDEPTH is an interactive, graphical computer program used to construct interpreted geological source models for observed potential-field geophysical profile data. The current version of PDEPTH has been adapted to the Windows platform from an earlier DOS-based version. The input total-field magnetic anomaly and vertical gravity anomaly profiles can be filtered to produce derivative products such as reduced-to-pole magnetic profiles, pseudogravity profiles, pseudomagnetic profiles, and upward-or-downward-continued profiles. A variety of source-location methods can be applied to the original and filtered profiles to estimate (and display on a cross section) the locations and physical properties of contacts, sheet edges, horizontal line sources, point sources, and interface surfaces. Two-and-a-half-dimensional source bodies having polygonal cross sections can be constructed using a mouse and keyboard. These bodies can then be adjusted until the calculated gravity and magnetic fields of the source bodies are close to the observed profiles. Auxiliary information such as the topographic surface, bathymetric surface, seismic basement, and geologic contact locations can be displayed on the cross section using optional input files. Test data files, used to demonstrate the source location methods in the report, and several utility programs are included.

Suggested Citation

Phillips, J.D., 2018, PDEPTH—A computer program for the geophysical interpretation of magnetic and gravity profiles through Fourier filtering, source-depth analysis, and forward modeling: U.S. Geological Survey Techniques and Methods, book 7, chap. C17, 23 p., https://doi.org/10.3133/tm7C17.

ISSN: 2328-7055 (online)

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Background
  • Program Description
  • Auxiliary Programs
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title PDEPTH—A computer program for the geophysical interpretation of magnetic and gravity profiles through Fourier filtering, source-depth analysis, and forward modeling
Series title Techniques and Methods
Series number 7-C17
DOI 10.3133/tm7C17
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geology, Geophysics, and Geochemistry Science Center
Description viii, 23 p.
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Section C: Computer programs in Book 7: Automated data processing and computations
Public Comments This report is Chapter 17 of Section C: Computer programs in Book 7: Automated data processing and computations.
Online Only (Y/N) Y
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