作 者: ;
机构地区: 中国科学院测量与地球物理研究所
出 处: 《地壳形变与地震》 1996年第2期8-11,共4页
摘 要: 研究了粘弹性半空间内膨胀(Mogi模型)引起的地表垂直位移和重力变化,推导了Maxwell半空间模型的解析计算公式。数值结果表明,地表垂直位移、重力变化以及重力变化与地表垂直位移之比受介质流变特性的影响很大。因此,在解释和模拟火山区、地壳隆起区、地热场等长期地表形变和重力观测时需考虑介质的流变特性影响。 Surface vertical displacements and gravity changes caused by a magmatic intrusion are investigated in a viscoelastic half space.An analytical formula in the Maxwell half space is developed.come numerical results indecate that the Earth's rheology has considerable effects on surface vertical displacements and gravity changes. Thus, the effects of earth's rheology on surface vertical displacements and gravity changes have to be taken into account when long-term observations of vertical displacements and gravity are interpreted in volcanic areas and crustal swell.