云南中部及周围地区近期地壳形变特征
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摘要
利用云南中部地区1992、2001、2006年3期精密水准复测资料以及1999—2007年数期GPS资料,分析该区近年来地壳形变状态与特征。结果表明:云南中部地区近期整个形变场差异运动显著,呈逆继承运动特征,反映出区域应力场变化的态势;GPS结果表明,印尼地震对川滇地区有明显的影响,同时可能对汶川地震的发生具有某种程度的催化作用。
With the use of repectedly measured level data in three periods:1992,2001 and 2006,and GPS data in several periods from 1999 to 2007 in the median region of Yunnan,this paper analyzes the status and characteristics of crustal deformation in this area are analyzed.The results suggest that differential movement of the whole deformation field in median region of Yunnan is obvious and manifests itself of a characteristic of non-inherit,and this reflects that the regional strain field has changed to some extent;the GPS results suggest that Indonesia earthquake has an obvious effect on Sichuan and Yunnan Area,and probably has an catalysis function on the happence of Wenchuan earthquake to certain extent.
With the use of repectedly measured level data in three periods:1992,2001 and 2006,and GPS data in several periods from 1999 to 2007 in the median region of Yunnan,this paper analyzes the status and characteristics of crustal deformation in this area are analyzed.The results suggest that differential movement of the whole deformation field in median region of Yunnan is obvious and manifests itself of a characteristic of non-inherit,and this reflects that the regional strain field has changed to some extent;the GPS results suggest that Indonesia earthquake has an obvious effect on Sichuan and Yunnan Area,and probably has an catalysis function on the happence of Wenchuan earthquake to certain extent.
引文
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7李齐,等.哀牢山-红河剪切带构造抬升和运动形式转换时间的新证据[J].中国科学(D辑),2000,30(6):576-583.
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11杨国华,韩月萍,杨博.川滇地区近期地壳水平运动与变形场的演化特征及其机制讨论[J].地震研究(待刊),2009.
2杨国华,等.云南地区现今地壳水平运动与变性特征[J].大地测量与地球动力学,2003,23(2):7-16.
3沈军,等.小江断裂带中段的北东向断裂与断块结构[J].地震地质,1997,19(3):203-210.
4宋方敏,汪一鹏,沈军.小江断裂带中段盆地的发育阶段及其与区域构造运动的关系[J].地震地质,1997,19(3):211-219.
5张希,等.川滇地区近期地壳运动的应变积累[J].大地测量与地球动力学,2007,23(4):8-15.
6杨国华,等.昆仑山8.1级地震对川滇地区近地壳水平形变的影响[J].中国地震,2007,23(1):56-64.
7李齐,等.哀牢山-红河剪切带构造抬升和运动形式转换时间的新证据[J].中国科学(D辑),2000,30(6):576-583.
8张四新,张晓亮,程宏斌.滇西地区现今垂直形变演化特征[J].地震研究,2005,28(3):268-273.
9付广裕,孙文科.2004年苏门答腊地震引起的远场形变[J].大地测量与地球动力学,2008,28(1):1-7.
10杨国华,等.印尼地震对我国川滇地区地壳水平活动的影响[J].大地测量与地球动力学,2006,26(1):9-14.
11杨国华,韩月萍,杨博.川滇地区近期地壳水平运动与变形场的演化特征及其机制讨论[J].地震研究(待刊),2009.
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