On: “Two‐dimensional joint inversion of magnetotelluric and dipole‐dipole resistivity data” by Y. Sasaki (GEOPHYSICS, 54, 254–262, February 1989)

Geophysics ◽  
1989 ◽  
Vol 54 (9) ◽  
pp. 1212-1212
Author(s):  
D. J. Dodds
Keyword(s):  
Joint Inversion ◽  
Dc Resistivity ◽  
Two Dimensional ◽  
Resistivity Data

There appears to be an error in the formulation of the dc resistivity response in this paper. Equation (6) is valid only when the conductivity is constant, but the text and the notation imply that it is variable. Grant and West (1965) give the correct relation [their equation (14‐2)], which is restated here using Sasaki’s notation and accounting for source currents.

Two Dimensional Joint Inversion of Seismic refraction, Radiomagnetotelluric and DC Resistivity Data: an example from Bafra plain, Turkey

2015 ◽  
Author(s):  
M.E. Candansayar ◽  
I. Demirci ◽  
A. Vafidis ◽  
P. Soupios ◽  
N. Economou ◽  
...  
Keyword(s):  
Joint Inversion ◽  
Seismic Refraction ◽  
Dc Resistivity ◽  
Two Dimensional ◽  
Resistivity Data

scholarly journals Incorporation of Topography into Two-dimensional dc Resistivity and CSAMT Joint Inversion

2004 ◽  
Vol 15 (1) ◽  
pp. 047 ◽  
Author(s):  
Chieh-Hou Yang ◽  
Li-Win Jeng ◽  
Hsing-Chang Liu
Keyword(s):  
Joint Inversion ◽  
Dc Resistivity ◽  
Two Dimensional

scholarly journals 3-D cross-gradient joint inversion of seismic refraction and DC resistivity data

2017 ◽  
Vol 141 ◽  
pp. 54-67 ◽  
Author(s):  
Zhanjie Shi ◽  
Richard W. Hobbs ◽  
Max Moorkamp ◽  
Gang Tian ◽  
Lu Jiang
Keyword(s):  
Joint Inversion ◽  
Seismic Refraction ◽  
Dc Resistivity ◽  
Resistivity Data

scholarly journals 3-D inversion of induced polarization data

Geophysics ◽  
2000 ◽  
Vol 65 (6) ◽  
pp. 1931-1945 ◽  
Author(s):  
Yaoguo Li ◽  
Douglas W. Oldenburg
Keyword(s):  
Wavelet Transforms ◽  
Joint Inversion ◽  
Linear Equations ◽  
Induced Polarization ◽  
Dc Resistivity ◽  
Data Sets ◽  
Bound Constraints ◽  
Borehole Data ◽  
Resistivity Data ◽  
Logarithmic Barrier

We present an algorithm for inverting induced polarization (IP) data acquired in a 3-D environment. The algorithm is based upon the linearized equation for the IP response, and the inverse problem is solved by minimizing an objective function of the chargeability model subject to data and bound constraints. The minimization is carried out using an interior‐point method in which the bounds are incorporated by using a logarithmic barrier and the solution of the linear equations is accelerated using wavelet transforms. Inversion of IP data requires knowledge of the background conductivity. We study the effect of different approximations to the background conductivity by comparing IP inversions performed using different conductivity models, including a uniform half‐space and conductivities recovered from one‐pass 3-D inversions, composite 2-D inversions, limited AIM updates, and full 3-D nonlinear inversions of the dc resistivity data. We demonstrate that, when the background conductivity is simple, reasonable IP results are obtainable without using the best conductivity estimate derived from full 3-D inversion of the dc resistivity data. As a final area of investigation, we study the joint use of surface and borehole data to improve the resolution of the recovered chargeability models. We demonstrate that the joint inversion of surface and crosshole data produces chargeability models superior to those obtained from inversions of individual data sets.

Two-dimensional joint inversion of radiomagnetotelluric and direct current resistivity data

2008 ◽  
Vol 56 (5) ◽  
pp. 737-749 ◽  
Author(s):  
M. Emin Candansayar ◽  
Bülent Tezkan
Keyword(s):  
Direct Current ◽  
Joint Inversion ◽  
Two Dimensional ◽  
Resistivity Data

scholarly journals Two-dimensional probabilistic inversion of plane-wave electromagnetic data: methodology, model constraints and joint inversion with electrical resistivity data

2013 ◽  
Vol 196 (3) ◽  
pp. 1508-1524 ◽  
Author(s):  
Marina Rosas-Carbajal ◽  
Niklas Linde ◽  
Thomas Kalscheuer ◽  
Jasper A. Vrugt
Keyword(s):  
Electrical Resistivity ◽  
Plane Wave ◽  
Joint Inversion ◽  
Two Dimensional ◽  
Electromagnetic Data ◽  
Resistivity Data ◽  
Probabilistic Inversion
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