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1、JournalofEngineeringGeology工程地質(zhì)學(xué)報1004—9665／2014／22(3)．0379—07DOI：10．13544／j．cnki．jeg．2014．03．005寶雞一常興段滑坡分布規(guī)律與發(fā)育背景術(shù)王佳運①②石小亞①馮衛(wèi)①②(①中國地質(zhì)調(diào)查局西安地質(zhì)調(diào)查中心西安710054)(②國土資源部黃土地質(zhì)災(zāi)害重點實驗室西安710054)摘要在前人工作的基礎(chǔ)上，借助實地調(diào)查、勘查等手段，分析研究了陜西省寶雞一常興段黃土塬邊滑坡分布規(guī)律與發(fā)育背景。通過分析、研究認為：(1)寶雞一常興段黃土塬邊自西向東滑坡規(guī)模由特大型向大型、中型甚至小型漸變；(2
2、)三級階地缺失或三級、二級階地同時缺失地段均有滑坡發(fā)育；(3)寶雞一常興段黃土塬邊滑坡集中發(fā)育在3個時期：晚更新世初期、全新世初期與全新世漫灘期；(4)渭河盆地西部地殼差異性向東掀斜運動形成了不同高差級別臺塬的地貌格局，決定了滑坡發(fā)育規(guī)模的規(guī)律性變化；渭河北遷與侵蝕加劇造成了寶雞一常興段黃土塬邊滑坡不同時期的集中出現(xiàn)；(5)人類工程活動的加劇是漫灘侵蝕期新滑坡或古老滑坡復(fù)活的主要誘發(fā)因素。關(guān)鍵詞黃土塬邊滑坡分布規(guī)律發(fā)育背景掀斜運動渭河北遷中圖分類號：P642．22文獻標(biāo)識碼：ADISTRIBUTIoNREGULARITYANDDEVELoPMENTBACKGRoU
3、NDoFLANDSLIDESATEDGEoFLoESSTABLELANDFRoMBAoJIToCHANGXINGWANGJiayun03~SHIXiaoya~FENGWei①②(①anCenterofGeologicalSurvey，ChinaGeologicalSurvey，Xian710054)(~KeyLaboratoryfo，Geo-hazardsinLoessArea，MLR，Xian710054)AbstractThispaperisbasedonthepredecessorsresearchandisaidedwithinvestigationand
4、prospectionatfield．ItanalyzesthedistributionregularityanddevelopmentbackgroundoflandslidesattheedgeoftheloesstablelandsfromBalitoChangxing．Itprovesthefollowingfivepoints．(1)ThescalesofthelandslidesdecreasegraduMlyfromsuperlargetolargeandmiddle，evensmal1．(2)Landslidesareatthesesiteswhe
5、rellIterraceorboth11IandIIterracedisappeared．(3)Developmentoflandslidesmainlyhasthreeperiods：earlystageoflatePleistoceneepoch，earlystageofHoloceneepochandlaststageofHoloceneepoch．(4)TheeastwardtiltingmovementwithactivitydifferenceofthelithosphereinthewestofWeiheriverbasinresultedinthe
6、physiognomypatternoftablelandswithdistinctaltitudedifferences．Thenitcontrolledthedevelopmentregularchangeofscalesofthelandslides．ThenorthwardmovementofWeiheriverandintenseriversideerodinginducedtheconcentrateddevelopmentoflandslidesattheedgeofthetablelandsindifferentperiods．(5)Theinte
7、nsehumanengineeringmovementsarethemaininducingfactorofnewlandslidesorrevivalofoldlandslidesinlatestageofHolocene．KeywordsLandslideattheedgeofloesstableland，Distributionregular，Developmentbackground，Tiltingmovement，NorthwardmovementofWeihefiver}收稿日期：2013-08-07；收到修改稿日期：2014—01-02．基金項目：國
8、土資源大調(diào)
