本文關(guān)鍵詞：南北地震帶北段近期地殼形變運(yùn)動特征分析　出處：《地理空間信息》2016年03期 　論文類型：期刊論文

  更多相關(guān)文章： GPS 速度場 速度剖面 基線時(shí)間序列 斷裂帶

【摘要】：利用2009~2011期和2012~2014期觀測的GPS連續(xù)和流動觀測數(shù)據(jù),經(jīng)過統(tǒng)一處理并扣除研究區(qū)域典型強(qiáng)震影響,獲取了穩(wěn)定、可靠的GPS時(shí)間序列及速度場結(jié)果。在此基礎(chǔ)上,通過GPS速度場分析、GPS剖面分析、基線時(shí)間序列分析來獲取南北地震帶北段地區(qū)地殼變形運(yùn)動特征。結(jié)果表明,莊浪河斷裂兩側(cè)的運(yùn)動差異逐漸變小,斷裂帶兩側(cè)的右旋減小;西秦嶺北緣斷裂和海原斷裂維持較穩(wěn)定的左旋剪切變形特征,其中,海原斷裂帶在2012~2014期的左旋剪切變形有所增強(qiáng)。
[Abstract]:Using the GPS continuous and mobile observation data observed in 2009 / 2011 and 2012 / 2014, the stability is obtained through unified processing and deduction of typical strong earthquakes in the study area. Based on the reliable results of GPS time series and velocity field, the GPS profile is analyzed by GPS velocity field analysis. The characteristics of crustal deformation and movement in the northern segment of the north and south seismic belt are obtained by the analysis of baseline time series. The results show that the difference between the two sides of the Zhuanglanghe fault becomes smaller and the right-hand of the two sides of the fault zone decreases. The northern margin of West Qinling and Haiyuan faults maintain stable left-lateral shear deformation characteristics, among which, the left-lateral shear deformation of Haiyuan fault zone increased in the period of 2012 ~ 2014.
【作者單位】： 中國地震局第一監(jiān)測中心;
【基金】：地震科技星火計(jì)劃資助項(xiàng)目(XH15061Y) 公益性地震行業(yè)科研專項(xiàng)資助項(xiàng)目(201308009) 震情跟蹤青年課題資助項(xiàng)目(2015010205)
【分類號】：P228.4;P227
【正文快照】： 南北地震帶作為我國強(qiáng)震密集帶和地震斷層交織帶[1,2],發(fā)生的地震具有強(qiáng)度大、頻度高的特點(diǎn)(10余a來先后發(fā)生1996年麗江7.0級地震、2008年汶川8.0級地震、2010年玉樹7.1級地震、2013年蘆山7.0級地震等)[3,4]。以GPS為代表的空間觀測技術(shù)的發(fā)展為地殼變形研究提供了高精度、大，

本文編號：1426096