A new formula to compute apparent resistivities from marine magnetometric resistivity data

  • Chen J
  • Oldenburg D
  • 27


    Mendeley users who have this article in their library.
  • 5


    Citations of this article.


Magnetometric resistivity MMR is an electromagnetic EM exploration method that has been used successfully to investigate electrical-resistivity structures below the sea- floor. Apparent resistivity, derived from the observed azi- muthal component of the magnetic field, often is used as an approximation to the resistivity of a layered earth. Two commonly used formulas to compute the apparent resistiv- ity have their own limitations and are invalid for a deep-sea experiment. In this paper, we derive an apparent-resistivity formula based upon the magnetic field resulting from a semi-infinite electrode buried in a 1D layered earth. This new formula can be applied to both shallow and deep ma- rine MMR surveys. In addition, we address the effects that arise from the transmitter-receiver Tx-Rx depth difference and the choice of the normalized range the radial distance between transmitter and receiver, divided by the thickness of seawater on data interpretation and survey design. The performance of the new formula is shown by processing synthetic and field data

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Jiuping Chen

  • Douglas W. Oldenburg

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free