The Effect of Glacial Cross-Section on Vertical Resistivity Depth Soundings

Autor:	R. W. Taylor, R. J. Greenfield
Rok vydání:	1973
Předmět:	010506 paleontology Cross section (physics) 010504 meteorology & atmospheric sciences Electrical resistivity and conductivity Glacial period 01 natural sciences Geomorphology Geology 0105 earth and related environmental sciences Earth-Surface Processes
Zdroj:	Journal of Glaciology. 12:375-382
ISSN:	1727-5652 0022-1430
DOI:	10.1017/s0022143000031798
Popis:	The determination of glacial ice thickness by vertical resistivity depth soundings relies upon the use of theoretical curves which neglect the effect of valley walls. To improve the utility of glacial resistivity measurements an analytical expression is derived for the apparent resistivity determined by a Wenner array oriented parallel to the strike of a layered trough embedded in a perfectly conducting half space. Numerical evaluation of this expression allows the effects of glacial cross-section to be determined. It is shown that the presence of valley walls and layering within the glacier can strongly effect the determination of total ice thickness, and a criterion for the reliable use of plane-layered master curves in the interpretation of field data is established. An apparent resistivity curve calculated for a layered trough is shown to give an excellent fit to field data published by Röthlisberger and Vögtli (1967).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5664835d31cdcda8805df44e7df12bf6 https://doi.org/10.1017/s0022143000031798 Zobrazit plný text záznamu