{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T19:05:05Z","timestamp":1777057505666,"version":"3.51.4"},"reference-count":0,"publisher":"Society of Exploration Geophysicists","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1992,9,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The interpretation of long-offset transient electromagnetic (LOTEM) data is usually based on layered earth models. Effects of lateral conductivity variations are commonly explained qualitatively, because three-dimensional (3-D) numerical modeling is not readily available for complex geology. One of the first quantitative 3-D interpretations of LOTEM data is carried out using measurements from the Munsterland basin in northern Germany. In this survey area, four data sets show effects of lateral variations including a sign reversal in the measured voltage curve at one site. This sign reversal is a clear indicator of two-dimensional (2-D) or 3-D conductivity structure, and can be caused by current channeling in a near-surface conductive body.Our interpretation strategy involves three different 3-D forward modeling programs. A thin-sheet integral equation modeling routine used with inversion gives a first guess about the location and strike of the anomaly. A volume integral equation program allows models that may be considered possible geological explanations for the conductivity anomaly. A new finite-difference algorithm permits modeling of much more complex conductivity structures for simulating a realistic geological situation. The final model has the zone of anomalous conductivity aligned below a creek system at the surface. Since the creeks flow along weak zones in this area, the interpretation seems geologically reasonable. The interpreted model also yields a good fit to the data.<\/jats:p>","DOI":"10.1190\/1.1443327","type":"journal-article","created":{"date-parts":[[2002,10,11]],"date-time":"2002-10-11T15:19:45Z","timestamp":1034349585000},"page":"1127-1137","source":"Crossref","is-referenced-by-count":61,"title":["Interpretation of 3-D effects in long-offset transient electromagnetic (LOTEM) soundings in the Muensterland area\/Germany"],"prefix":"10.1190","volume":"57","author":[{"given":"Andreas","family":"Hoerdt","sequence":"first","affiliation":[{"name":"Univ. Koeln, Inst. Geophys. und Meteorol., Cologne, Federal Republic of Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vladimir L.","family":"Druskin","sequence":"additional","affiliation":[{"name":"Schlumberger Doll Res., United States"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leonid A.","family":"Knizhnerman","sequence":"additional","affiliation":[{"name":"Cent. Geophys. Exped., USSR"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kurt-Martin","family":"Strack","sequence":"additional","affiliation":[{"name":"West. Atlas Int., United States"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"186","published-online":{"date-parts":[[1992,9,1]]},"container-title":["Geophysics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/57\/9\/1127\/3162462\/1127.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/57\/9\/1127\/3162462\/1127.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,11]],"date-time":"2025-12-11T17:01:58Z","timestamp":1765472518000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.geoscienceworld.org\/geophysics\/article\/57\/9\/1127\/106388\/Interpretation-of-3-D-effects-in-long-offset"},"secondary":[{"URL":"http:\/\/geophysics.geoscienceworld.org\/cgi\/doi\/10.1190\/1.1443327","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1992,9,1]]},"references-count":0,"journal-issue":{"issue":"9","published-print":{"date-parts":[[1992,9,1]]}},"URL":"https:\/\/doi.org\/10.1190\/1.1443327","relation":{},"ISSN":["1942-2156","0016-8033"],"issn-type":[{"value":"1942-2156","type":"electronic"},{"value":"0016-8033","type":"print"}],"subject":[],"published-other":{"date-parts":[[1992,9,1]]},"published":{"date-parts":[[1992,9,1]]}}}