本文選題：渭河盆地 + GPS　； 參考：《武漢大學(xué)學(xué)報(bào)(信息科學(xué)版)》2017年06期

【摘要】：利用渭河盆地2001~2010年高精度GPS監(jiān)測資料,采用有限元數(shù)值分析法,分析了渭河盆地內(nèi)深大斷裂處的構(gòu)造應(yīng)力特征及斷裂活動(dòng)特性。結(jié)果表明,盆地西部斷裂處均呈現(xiàn)出明顯的近E-W(east-west)向擠壓應(yīng)力特征,而盆地中部斷裂處則均呈現(xiàn)出顯著的NW-SE(northwest-southeast)向拉張應(yīng)力特征,東部斷裂處呈現(xiàn)出一定的NW-SE向拉張應(yīng)力,但該部量值較中部斷裂處小;走向各異的同一條深大斷裂不同區(qū)段,呈現(xiàn)出的應(yīng)力特征、量值以及活動(dòng)速率也存在差異性;跨斷裂剖線顯示沿?cái)嗔炎呦虻乃俣确至吭跀嗔褍蓚?cè)均發(fā)生了一定量值的變化,構(gòu)造斷裂具有一定的扭動(dòng)特性。模擬計(jì)算結(jié)果進(jìn)一步顯示盆地中部較東、西部受NW-SE向拉張應(yīng)力作用顯著,且在中部這些具有拉張應(yīng)力特征的深大斷裂交匯處,特別是斷裂活動(dòng)速率較大的區(qū)段,正是盆地內(nèi)地裂縫災(zāi)害最為集中發(fā)育的區(qū)域。
[Abstract]:Based on the high-precision GPS monitoring data of Weihe Basin from 2001 to 2010, the structural stress characteristics and fault activity characteristics of deep and large faults in Weihe Basin are analyzed by using finite element numerical analysis method. The results show that all the faults in the western part of the basin show the characteristics of compressional stress in the near E-WW west direction, while in the central part of the basin, the tensile stress in the NW-SEE northwest-southeastdirection is obvious, and in the eastern fault there is a certain tensile stress in the direction of NW-SE. However, the value of this part is smaller than that of the central fault, and the stress characteristics, the magnitude and the activity rate of the same deep and large fault with different strike are also different. The cross-fault profile shows that the velocity component along the fault strike has changed in a certain amount on both sides of the fault, and the tectonic fault has a certain torsion characteristic. The simulation results further show that the central part of the basin is more eastern, and the west part of the basin is significantly affected by the NW-SE tensile stress, and in the central part of the basin, which has the characteristics of tensile stress, the deep and large fault intersections, especially the section with higher rate of fault activity, are found in the middle part of the basin. It is precisely the area where fracture disasters are most concentrated in the interior of the basin.
【作者單位】： 長安大學(xué)地質(zhì)工程與測繪學(xué)院;成都理工大學(xué)地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國家重點(diǎn)實(shí)驗(yàn)室;中國地震局第二監(jiān)測中心;
【基金】：國家自然科學(xué)基金(41674001,41202189,41274005,41504005) 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2016JM4005) 地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國家重點(diǎn)實(shí)驗(yàn)室開放基金(SKLGP2014K009) 中國博士后基金(2013M530412) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(2014G1261050,2014G3263014)~~
【分類號】：P228.4;P542

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