摘要
本文利用人工爆破地震资料,在频率域中,用波组频谱比方法计算了福州地区的Q结构,结果发现:该区中地壳低速层Q值明显偏低,仅为40——80,且存在横向变化,地壳上部和下部Q均为200左右;福州盆地与永泰——梧桐地段地壳平均Q也明显偏低,且福州盆地中部Q仅120—150,为全区最低值,低Q区与温泉分布和断裂位置有良好的对应关系。
In the frequency domain, basing by the data of manual ex- plosion earthquake, Q-structure in Fuzhou area is calculted by the method of wave group and frequency spectrum ratio. The result shows that the Q?value in the low velocity layer is obvously going off lower about 40-80 and lateral variation is also existed in the area. The Q-value of upper and down of the crust is about 200 averagely, the same thing also occurred in the crust from Fuzhou basin to Yongtai-Wutong, especially the Q-value in the middle part of Fuzhou basin is in the lowest about 120-150 and it has also corresponding relations with the distribution of hot springs and location of rifts.
出处
《华南地震》
1990年第3期1-8,共8页
South China Journal of Seismology
关键词
地壳结构
介质品质因子
不均匀性
Fuzhou of China
Crustal structure
Medium and quality factor
Lateral heterogeneity
