摘要
Abstract
Since the derivation of the in-loop full⁃zone voltage response formula, many papers have dealt with utilizing it to work out the solution for full⁃zone apparent resistivity, and the conclusions have three points: unique valued, dual⁃valued and undefined valued. The conclusions are based on mathematical theoretical analysis. They are of course correct, but not perfect. The main characteristic of the full⁃zone apparent resistivity curve of observed data is continuous or discontinuous. Based on model study, the author concluded that the main characteristics of an observed data on he layered earth are as follows: the full⁃zone apparent resistivity curves are all discontin⁃uous, and there are three factors, i.e., no unique value exists because measurements are discontinuous, and therefore sampling time is rarely just at the transition point; undefined value exists because observed value is greater than homogeneous half⁃spaces; wrongly de⁃fined value exists when the observed response is lower than homogeneous half⁃space's. The last term is named by the author firstly. The normalizing processing is the only method to get the continuity of the full⁃zone apparent resistivity.关键词
TEM/中心回线/全区视电阻率/电动势/模型计算/发射回线边长/阶跃波激发Key words
TEM/central loop line/whole area resistivity/electrodynamic force/model calcuation/side length of emission loop linestep wave excitation分类
天文与地球科学
