地震学报（英文版）2008，Vol.21Issue(4)：417-424,8.
Exploration of Laoyachen fault in Zhengzhou and its activity investigation
Exploration of Laoyachen fault in Zhengzhou and its activity investigation
摘要
Abstract
In the paper, an exploration is made by the techniques of shallow seismic prospecting, borehole composite profile analysis, field morphological investigation, and new geological dating for the Laoyachen fault in Zhengzhou that was originally recognized as an active one. The result from shallow seismic prospecting indicates this fault only existed in the stratum prior to the Neogene, dislocations and activity traces of this fault could not be found in the Neogene stratum. At the same time, the surface morphological investigation reveals that the location of the so-called "fault scarp" is not consistent with that of Laoyachen fault. Moreover, seismic drilling and borehole composite profile analysis also indicate that the scarp only developed in Malan Loess. The stratum beneath it is gentle and no dislocation traces can be seen. Therefore, we propose that this scarp is not relevant to the Laoyachen fault, which might be resulted from the diverted course of Yellow River. Laoyachen fault is not an active one.关键词
Laoyachen fault/fault activity/shallow seismic prospecting/drilling/morphological investigationKey words
Laoyachen fault/fault activity/shallow seismic prospecting/drilling/morphological investigation分类
天文与地球科学引用本文复制引用
HAO Kai,TIAN Qin-jian,LIU Bao-jin,YIN Gong-ming..Exploration of Laoyachen fault in Zhengzhou and its activity investigation[J].地震学报（英文版）,2008,21(4):417-424,8.基金项目
The Project of National Key Technology R & D Program and the "Tenth Five Year Plan" of National Development and Program Commission. （）
