1·That is one of the possible reasons why there is no "high-conductive layer of the upper mantle" in the MT profile from Yingxian to Shanghe, which images the asthenosphere electrical characters.
这也许正是根据现今应县—商河剖面上大地电磁的探测结果看不出来存在通常所说的反映“软流圈”电性特征的“上地幔高导层”的原因。