Activity Age Study of Tongbai Fault

On the basis of existing works, using the complementary survey and collection of Oil drilling data, according to two drilling joint section of Tongbai fault on either side of the north and south, the distribution map of quaternary thickness around Tongbai fault is given. The results show that the area around Tongbai fault missing early Pleistocene stratum, the Quaternary thickness in the north of Tongbai is less than that in the south, which indicates that Tongbai fault is dipping to the south. This article also uses the result of the Langfang city active fault detection combined with the result of borehole profile across the Tongbai fault, accurately survey seismic profiles of Tongbai fault and oil borehole data near the Tongbai fault to judge activity age of Tongbai fault. We can get the conclusions that the active age of Tongbai fault is to the latest Pleistocene.