福建省Q值分布与地震活动规律的探讨

Discussion on the Q-Value Distribution and Seismic Activities in Fujian Province

本文通过62个地震数据的资料计算结果,得到上地壳(20 km以上)及下地壳(20 km以下)的Q值,并结合福建省地壳结构,探讨我省Q值分布与地震活动规律。永定—德化—福州构造带是低Q值带,恰为地震活动带;在云霄—金门有—高Q值(大于1000)区,轴向NEE,推断为地幔隆起区,而在高Q值与低Q值过渡带上(即介质突变带)为地震活动区。

The paper focuses on the regular pattern of Q-value distribution and seismic activities in Fujian Province. The Q-values in the depth 20 km of crust are obtained based on the calculation of 62 seismic data. After analyzing the crustal structures of Fujian Province and the calculated Qvalues, the authors made a discussion on the regular pattern of the Q-value distribution and seismic activities in Fujian Province. The Yongding-Dehua-Fuzhou structural belt is a low Q-valre region, which coincides with the belt of seismic activities. There is a high Q-value region (>1000) along the Yunxiao-Jinmeng structural belt, which is inferred as a mantle upwelling area. However, the transitional belt between the high and low Q-values (medium mutation belt) is a region of seismic activities.