A Method of Estimating the Block-Like Body Under the Ground from the Polarization Ellipse of the Magnetic Field

應用磁場極化橢圓來推估地下塊狀體法

楊潔豪(Chieh-Hou Yang) ； 董倫道(Lun-Tao Tong)

《Terrestrial, Atmospheric and Oceanic Sciences》 1卷3期 (1990/09) Pp. 207-224

摘要

應用數值法模擬寬頻磁流電磁法對地下二維塊狀構造體之響應，依磁場反應之傾角或橢圓率與頻率關係圖，顯示傾角或橢圓率更換點之頻率與塊狀體中心之深度及塊狀體與圍岩之電阻率比値相關。據此特性，可作各相關參數間之列線圖，提供應用磁場極化資料來推估地下塊狀體特性之一可行性方法。

並列摘要

The feasibility of using the broad-band Magnetotelluric (MT) methodfor locating a two-dimensional(2-D)block-like body is studied by means of numerical models. An example of its applicability for locating a block-like anomalous body indicates that the sign reversal frequency of the tilt angle, or the ellipticity responses of magnetic polarization relates to the depth of the center of the anomalous body, and also to the resistivity contrast of the anomalous body to the host rock, based on the relationship of the few nomograms are developed, that provide anew approach to the interpretation of the magnetic polarization data.