摘要
中间梯度法是野外常用的一种电阻率勘探方法,当其测量范围在供电电极的中间地段(即长度为AB/3)时,电场即可近似地看成是均匀的。如果地质断面是二维的,则可采用本文的方法做视电阻率异常的正演计算。本方法与国外已有的方法相比,具有模拟功能强和计算量小等优点,可以对二维复杂地形条件下存在多个地质体的情况进行模拟,特别是略去了对偏导数项((?)u/(?)n)的计算,从而大幅度节省了计算量。
Mid-Gradient array is one of the electrode configurations widely employed in electrical prospecting. The electric field is considered to be approximately homogeneous when the measurement range is in the central part of current electrodes AB, that is, occupies third of AB. The method presented here can calculate the resistivity anomaly caused by many geological bodies (only confined to 2-D bodies) under a rugged topography. Comparing with other modeling methods, this method has the main advantage that it can solve a complicated forward problem in a uniform electric field in which many geological bodies are buried under an arbitrary topography. Particularly, it need not calculate the partial derivation ((?)u/(?)n) any more, so that it saves a lot of calculating time.
出处
《物探化探计算技术》
CAS
CSCD
1990年第2期106-112,共7页
Computing Techniques For Geophysical and Geochemical Exploration
