摘要
本文主要讨论北镇至赤峰剖面重力场变化特征，尤其是在１９９７年１０月，该剖面出现大范围重力场下降，最大值达－７０×１０－８ｍ·ｓ－２。１９９８年２月复测和６月的再次复测结果表明，重力异常已基本恢复到１９９７年６月时水平。因此认为，这一异常现象可能与地震孕育阶段地壳深部物质的变异有关。
The variations of gravity field in Beizhen Chifeng profile are mainly discussed in this paper ,especially a large area of decrease in gravity value with a maximum of -70×10-8m·s-2 was detected in Oetober,1997.On the basis of the gravity repeated surrey in February,1998 and repeated measurement in June,1998,the results showed that the relative gravity values had essentially returned to the original level in Jnne,1997.Therefore,it is believed that the anomalous phenomenon has something to do with the change of the deep crust material at the seismogenic stage .
出处
《东北地震研究》
1998年第4期22-27,共6页
Seismological Research of Northeast China
