Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000geoji.140..577h&link_type=abstract
Geophysical Journal International, Volume 140, Issue 3, pp. 577-586.
Astronomy and Astrophysics
Astronomy
4
Crustal Structure, Electrical Conductivity, Electromagnetic Modelling, Electromagnetic Survey
Scientific paper
The standard 1-D inversion approach for the interpretation of transient electromagnetic (TEM) data usually fails in the presence of near-surface conductivity anomalies. Since multidimensional inversion codes are not routinely available, the only alternative to discarding the data may be trial-and-error forward modelling. We interpret data from a long-offset transient electromagnetic (LOTEM) survey which was carried out in 1995 in the Odenwald area, using 2-D finite-difference modelling. We focus on a subsegment of the LOTEM profile, which was shot with two different electric dipole transmitters. A model is found which consistently explains the electric and magnetic field data at eight locations for both transmitters. First, we introduce a conductive dyke under the receiver spread to explain sign reversals in the magnetic field transients. A conductive slab under one of the transmitters is required to obtain a reasonable quantitative fit for that transmitter. Consideration of the electric field data then requires a modification of the layered earth background. Finally, we study the response of a crustal conductor, which was the original target of the survey. The data are sensitive to the conductor, and for the investigated subset of the data the fits are slightly better without the conductive layer.
Dautel S.
Hördt Andreas
Tezkan Bülent
Thern H.
No associations
LandOfFree
Interpretation of long-offset transient electromagnetic data from the Odenwald area, Germany, using two-dimensional modelling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Interpretation of long-offset transient electromagnetic data from the Odenwald area, Germany, using two-dimensional modelling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interpretation of long-offset transient electromagnetic data from the Odenwald area, Germany, using two-dimensional modelling will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1290711