Discussion on the division of the middle section of the northern margin of north China platform

In the course of studing, deducing and interpretating the aeromagnetic data of North China Platform, the author has synthesized and compared various data, and then discovered that the middle section of the northern margin of North China Platform (i.e. within the limit of 112 deg to 117 deg E longitude) should traverse along 42 deg 35'to 42 deg 40' N latitude, implying that the limit of the northern area of the platform is expanded, and it is also of important significance in expanding the prospecting potential in the northern margin of North China Platform