
TY  - JOUR
A1  - Sengpiel, K.P. 
A1  - Siemon, B. 
T1  - Examples of 1-D inversion of multifrequency HEM data from 3-D resistivity distributions
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 1998
VL  - 29
IS  - 2
SP  - 133
EP  - 141
KW  - 
UR  - https://doi.org/10.1071/EG998133 
N2  - Since 1993 we have been using a program developed by the BGR for the automatic inversion of frequency-domain helicopter electromagnetic (HEM) data into the parameters of a layered half-space. This Marquardt-type inversion procedure uses sounding curves for generating suitable starting models. To better understand the results, model calculations have been carried out using 1-D and 3-D resistivity models to generate synthetic data which were inverted using homogeneous or layered half-space models. Inversion results demonstrate that reliable models can be obtained if sufficient and accurate data are available. In particular, we have shown that the 1-D inversion program provides very useful results even in the presence of lateral changes in resistivity. Several examples of inversion results based on theoretical data and survey data are discussed. 
ER  -

