摘要
从地磁弯扰和急始的记录揭示出渤海西岸的昌黎—唐山地区是一个电导率异常区。根据地磁感应矢量和昌黎的大地电磁测深曲线推测,这个异常可能属于DV型CA,其走向近于东西向。一种可能的解释是:构造的南侧离地面60公里以下有一低电阻率层,电阻率约为20欧姆米;北侧可能不存在这样的低电阻率层。
In the west coast of Bo Hai--the region of Changli to Tangshan,a conductivityanomaly has been found by the records of geomagnetic short-period(bay’s,ssc’s)variations.According to the induction vectors and the magneto-telluric sounding curves of Changli,the strike of the anomaly is in an east-west direction,and it seems to belong to the"Directional Variation Type".We can make a probable interpretation to it,that there is a high conductivity layer in the southern part of the structure at a depth of 60 km.with a resistivity about 20Ωm,but on the contrary,the high conductivity layer may be absent in the northern part.
作者
陈伯舫
CHEN PO-FANG(Department of Geophysics,Peking University)
出处
《地球物理学报》
1974年第3期169-172,共4页
Chinese Journal of Geophysics
