Induced Polarization with Electromagnetic Coupling: 3D Spectral Imaging Theory EMSP Project No. 73836

Abstract

, 3D induced polarization data from measurements to map subsurface contaminations of tetrachloroethylene and trichloroethylene, Eos Trans., AGU, 84 (46) , FeedbackNone. Appendices Copy of Publications16 AbstractThis paper reviews the current understanding of induced polarization (IP) source mechanisms gained from laboratory studies as related to the polarization response of contaminated rocks and soils. This review takes the perspective of a prospective user of such information for development of an interpretation methodology for field applications.The prospects for the application of time domain induced polarization (TDIP) or spectral domain induced polarization (SIP) to the problem of locating the subsurface distribution of contamination looked bright in the wake of published data claiming contamination produced measurable polarization response in rocks/soils. However, the literature today is dotted with conflicting reports of the polarization properties of contaminated rocks/soils. We have carried out a significant number of field experiments over contaminated soils and groundwater where inversion of the data successfully located the contaminated regions.However, this review finds that an interpretation methodology that can be applied to field results based on laboratory studies of IP source mechanisms is still lacking. In addition, there is a general difference in the levels of polarization response of contaminated rocks/soils recorded in the field and in laboratory studies raising fresh concerns about the validity of a contamination related polarization signature. A field example is shown that supports significant polarization signature recorded over a site contaminated with Tetrachloroethylene (PCE) and Trichloroethylene (TCE). IntroductionInduced polarization phenomena in earth media -rocks, soils, and sedimentshas been known and studied both in the laboratory and field for over 80 years (Schlumberger, 1920; Bleil, 1953;Wait, 1959;Marshall and Madden, 1959). Early applications of induced polarization were to metallic mineral prospecting (i.e. see, Wait, 1959) and groundwater investigations (Vacquier, et al., 1957; Bodmer et al., 1968). Although there were references to logging applications in this period in the U.S.S.R. (Dakhnov et al., 1952(Dakhnov et al., , 1959, IP logging applications did not receive widespread serious considerations until later (Hoyer and Rumble, 1976; Snyder et al., 1977; Vinegar et al., 1 Earth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology. e-mail: sogade@erl.mit.edu 1985). Subsequent applications were to environmental problems (Angoran, 1974;Olhoeft and King, 1991;Morgan et al., 1999; Slater and Lesmes, 2002; Briggs et al., 2003 Briggs et al., , 2004.In recent times, laboratory studies (Olhoeft, 1986; suggested that chemical contamination introduced into rocks or soils produced measurable polarization response compared to clean samples. These observations, and similar ones published subsequently, led ma...

Induced polarization 3D tomography of an archaeological direct reduction slag heap

“…As examples, Ingeman-Nielsen and Baumgartner (2006) provided tools for the modelling of these effects. Morgan and Lesmes (2004) discussed both inductive and capacitive coupling when applying IP to contaminant plumes, whereas Ghorbani et al (2009) developed inversion techniques for the horizontally layered subsurface, which take coupling effects into account in the determination of the Cole-Cole parameters. The ERT inversion in 3D has also become a standard method and 3D IP has followed this progress.…”