| 基于GPS的江苏南部现今地壳形变特征分析 |
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| 引用本文： | 张永奇,张勤,瞿伟.基于GPS的江苏南部现今地壳形变特征分析[J].华北地震科学,2013(3):8-13. |
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| 作者姓名： | 张永奇 张勤 瞿伟 |
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| 作者单位： | [1]陕西省地震局,西安710068 [2]长安大学地质工程与测绘学院,西安710054 |
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| 基金项目： | 国土资源大调查项目：苏锡常地区地面沉降监测与风险管理（1212010641202）;苏锡常地区地面沉降监测与控制管理（1212011220175） |
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| 摘 要： | 基于2007-2009年江苏南部GPS资料,借助多面函数法及位移-应变模型求取了研究区的速度场及应变特征参数,结合地质构造背景及地震活动性对该区地壳形变特征进行分析.研究结果表明：（1）江苏南部现今地壳整体朝南东向运动,临海地区与内陆地区速度差异较大,量值在5～10 mm/a;（2）研究区域呈现面应变正负交替出现的规律,在泰州、南通、嘉定出现面膨胀、剪切应变高值区,未来发生中强地震的可能性较大；（3）江苏南部地区地壳运动受太平洋板块、菲律宾海板块和欧亚板块的共同作用,构造机理复杂.
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| 关 键 词： | 江苏南部 GPS 多面函数法 地壳形变 地震预测 |
Analysis of Present-day Crustal Deformation in Southern Jiangsu Based on GPS Data |
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| ZHANG Yong-qi,ZHANG Qin,QU Wei.Analysis of Present-day Crustal Deformation in Southern Jiangsu Based on GPS Data[J].North China Earthquake Sciences,2013(3):8-13. |
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| Authors: | ZHANG Yong-qi ZHANG Qin QU Wei |
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| Institution: | 1. Earthquake Administration of Shaanxi Province, Xi＇an 710068, China 2. School of Geological Engineering and Surveying Chang＇an University, Xi＇an 710054, China) |
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| Abstract: | In this paper,based on GPS data of 2007～2009 in southern Jiangsu,using multi-surface function and the displacement-strain model,the velocity field and strain parameters in the study area is calculated combined with the geological background and seismicity in order to analysis the crustal deformation of the area.The results show that：（1） the present crust of southern Jiangsu generally moves southeastward,the difference in velocity of coastal areas and inland is great and the quantity value is about 5 ～ 10 mm/a;（2） the surface expansion of the study area shows the law of alternating positive and negative value,Surface expansion and shear strain appears high value area in Taizhou,Nantong and Jiading area in which the risk of mid-strong earthquakes is higher in the future; （3） the crustal movement of southern Jiangsu is effected by the Pacific plate,the Philippine sea plate and the Eurasian plate,and the tectonic mechanism of the area is complex. |
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| Keywords: | Southern Jiangsu GPS multi-surface function crustal deformation earthquake prediction |
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