吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (2): 525-533.doi: 10.13278/j.cnki.jjuese.20170270
宁亚灵1,2, 许家姝3, 解滔4, 张国苓5, 卢军4
Ning Yaling1,2, Xu Jiashu3, Xie Tao4, Zhang Guoling5, Lu Jun4
摘要: 为了评估观测质量,本文结合大柏舍地震台电测深资料,采用水平层状介质模型分析了该台站对称四极装置深井地电阻率观测时影响系数随电极深度和观测极距的变化。分析结果表明:大柏舍台现有的深井地电阻率观测水平测道虽然能有效地抑制来自地表的干扰,但是由于观测极距较小,不能很好地反映深部介质电阻率的变化信息;垂直测道因电极埋深位于地下水位变动层位,观测数据受地下水位波动影响较大,较难识别来自深部介质的信息。为有效地记录可能的孕震信息,水平测道极距AB/2取250~350 m、埋深H>150 m能满足需求,并建议增加NS向水平测道观测。
中图分类号:
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