沂沭断裂带中部地区地震波速及地壳厚度的测定  

Measurements of Velocity of Seismic Wave and Crustal Thickness in the Mid-segment of Yihe-Shuhe Fault Zone

作　　者：石玉燕[1] 颜启[1] 林怀存[1] 

机构地区：[1]山东省地震局,济南250014

出　　处：《地震研究》2003年第4期328-331,共4页Journal of Seismological Research

摘　　要：选取 1990～ 2 0 0 1年发生在沂沭断裂带中部地区的 2 3次ML2 3～ 4 0级地震为基础资料 ,对沂沭断裂带中段及附近地区地震波速进行了研究。结果表明 ,研究区 VP=5 83km s , VS=3 5 4km s。同时 ,根据反射波走时方程 ,得出该地区反射波速度VP1 1 =6 2 1km s ,VS1 1 =3 6 5km s和平均地壳厚度为 37km。Twenty-three M_L2.3～4.0 earthquakes occurred from middle segment of Yihe-Shuhe fault zones from 1990 to 2001 are selected as the basic data. The velocity of seismic wave in the mid-segment of Yihe-Shuhe fault zone and nearby has been studied. The results show that the _p=5.83km/s and _S=3.54km/s in the studying area. Meanwhile, according to the travelling time of reflected wave, we have obtained that the velocity of reflected waves are V_ P_ 11 =6 .21km/s, V_ S_ 11 =3.65km/s and the average crustal thickness is 37km.

关 键 词：沂沭断裂带 地震波速 地壳厚度 厚度测定 

分 类 号：P315.3[天文地球—地震学] P313.2[天文地球—固体地球物理学]