利用InSAR技术研究新疆阿什库勒火山群现今活动性

doi:10.3969/j.issn.0253-4967.2013.03.007

地震地质 ›› 2013, Vol. 35 ›› Issue (3): 532-541.DOI: 10.3969/j.issn.0253-4967.2013.03.007

利用InSAR技术研究新疆阿什库勒火山群现今活动性

季灵运^1,2, 许建东¹, 赵波¹, 万园³, 申欢欢¹

1. 中国地震局地质研究所, 活动构造与火山重点实验室, 北京 100029;
2. 中国地震局第二监测中心, 西安 710054;
3. 中国地震局地质研究所, 北京 100029

收稿日期:2013-01-08 修回日期:2013-02-28 出版日期:2013-09-30 发布日期:2013-10-12
作者简介:季灵运,男,1982年生,2013年在中国地震局地质研究所获构造地质学专业博士学位,工程师,主要从事InSAR技术在地震、火山形变领域的应用研究,电话:029-85506715,E-mail:dinsar010@163.com。
基金资助:
中国地震局地震行业科研专项 "新疆于田7.3级地震与阿什库勒火山综合科学考察"(201008004)和中国地震局地质研究所基本科研业务专项 "新疆阿什库勒火山喷发序列"(IGCEA1101)共同资助

PRESENT-DAY ACTIVITY OF ASHIKULE VOLCANIC GROUP FROM INSAR

JI Ling-yun^1,2, XU Jian-dong¹, ZHAO Bo¹, WAN Yuan³, SHEN Huan-huan¹

1. Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. Second Crust Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China;
3. Institute of Geology, China Earthquake Administration, Beijing 100029, China

Received:2013-01-08 Revised:2013-02-28 Online:2013-09-30 Published:2013-10-12

摘要/Abstract

摘要：

新疆于田县以南250km处的阿什库勒盆地内部,坐落着由10余座主火山和数十个子火山组成的阿什库勒火山群。该火山群海拔较高,气候恶劣,现今活动性未知。文中基于Envisat ASAR和ALOS PALSAR卫星影像资料,利用干涉图堆叠技术和短基线集合成孔径雷达干涉测量技术提取了阿什库勒火山群地区2003—2010年的地表形变场,并据此分析了火山的现今活动状态。结果表明,2008年于田地震之前(2003—2007年),阿什库勒火山群地区比较稳定,形变不明显; 2008年于田地震之后(2008—2010年),阿什库勒火山群地区整体有沿雷达视线方向隆升的态势,累积最大约1cm,为震后块体应力调整的结果,并非火山活动引起的地表形变。而于田地震地表同震破裂带北端则显示出了较强的东向水平运动和垂向下沉运动的形变态势,累积最大约6cm。

关键词: InSAR, 阿什库勒火山群, 地表形变, 形变时间序列

Abstract:

The Ashikule volcanic group is located in the Ashikule Basin,which is situated about 250km south of Yutian County,Xinjiang. Ashikule volcanic group consists of more than 10 large volcanoes and dozens of small volcanoes. Its present-day activity is unknown due to the extremely high altitude and inclement weather. Based on Envisat ASAR and ALOS PALSAR images,we obtain the land surface deformation field(2003-2010)by using stacking InSAR(Interferometric Synthetic Aperture Radar)and SBAS-InSAR(Small BAseline Subsets-Interferometric Synthetic Aperture Radar)techniques. We also analyze the volcanic activity based on the InSAR-derived deformation field. Our results show that the deformation of Ashikule volcanic group was not obvious before the 2008 Yutian earthquake(2003-2007).However,it showed a large-scale movement towards satellite after the 2008 Yutian earthquake(2008-2010)with largest accumulated displacement of 1cm. We speculate the large-scale movement had nothing to do with volcanic activity,but it was a result of stress adjustment caused by the 2008 Yutian earthquake. Nevertheless,the northmost end of the coseismic rupture showed movement towards east,and also deflated very much with accumulated subsidence of 6cm.

Key words: InSAR, Ashikule volcanic group, land surface deformation, deformation time series

中图分类号:

P317.6

季灵运, 许建东, 赵波, 万园, 申欢欢. 利用InSAR技术研究新疆阿什库勒火山群现今活动性[J]. 地震地质, 2013, 35(3): 532-541.

JI Ling-yun, XU Jian-dong, ZHAO Bo, WAN Yuan, SHEN Huan-huan. PRESENT-DAY ACTIVITY OF ASHIKULE VOLCANIC GROUP FROM INSAR[J]. SEISMOLOGY AND GEOLOGY, 2013, 35(3): 532-541.

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利用InSAR技术研究新疆阿什库勒火山群现今活动性

PRESENT-DAY ACTIVITY OF ASHIKULE VOLCANIC GROUP FROM INSAR

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