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塔里木盆地吐木休克构造带断裂构造分析 摘要: 塔里木盆地是中国西北地区最大且最活跃的盆地之一,吐木休克构造带是塔里木盆地中一个重要的断裂构造带。本文通过对吐木休克构造带进行分析,总结了其构造特征及成因机制,并讨论了其在控制盆地构造演化过程中的作用。研究发现,吐木休克构造带是一个主要由逆断层和走向断层组成的断裂构造带,其主要发育于中生代三叠系-侏罗系地层,呈东西向走向。构造分析表明,吐木休克构造带的形成与印度板块与欧亚板块的构造碰撞有密切关联,是由板块运动及地壳应力作用形成的。此外,吐木休克构造带的存在对于塔里木盆地的地壳运动、构造演化及其成矿作用具有重要影响。 关键词:塔里木盆地;吐木休克构造带;逆断层;走向断层;构造演化 Introduction TalimuBasinisthelargestandmostactivebasininnorthwesternChina.TuimuxuktectoniczoneisanimportantfaultzoneintheTalimuBasin.Inthispaper,weanalyzethestructuralcharacteristicsandgenesismechanismofTuimuxuktectoniczone,anddiscussitsroleincontrollingthestructuralevolutionofthebasin.ThestudyfindsthattheTuimuxuktectoniczoneismainlycomposedofthrustfaultsandstrike-slipfaults,whichdevelopedinTriassic-JurassicstrataandtrendinginanE-Wdirection.StructuralanalysisshowsthattheformationoftheTuimuxuktectoniczoneiscloselyrelatedtothecollisionbetweentheIndianplateandtheEurasianplate,whichisformedbyplatemovementandcrustalstress.Inaddition,theexistenceoftheTuimuxuktectoniczoneplaysanimportantroleinthecrustalmovement,structuralevolution,andmineralizationoftheTalimuBasin. StructuralCharacteristics TuimuxuktectoniczoneisamajorfaultzoneintheTalimuBasin,whichcontrolsthedistributionandevolutionofthebasinstructure.Thetectoniczonemainlycomprisesofthrustfaultsandstrike-slipfaults,whicharedevelopedintheTriassic-JurassicstrataandtrendinanE-Wdirection.Thefaultzoneisabout200kminlengthand10-20kminwidth.Ingeneral,thetectoniczonecanbedividedintotwoparts:theeasternpartandthewesternpart.Theeasternpartisdominatedbythrustfaults,whilethewesternpartisdominatedbystrike-slipfaults.Thethrustfaultsintheeasternpartaresteeplydippingandhaveahighangle.Incontrast,thestrike-slipfaultsinthewesternparthaverelativelylowdipsandonlyhaveasmalldisplacement. GenesisMechanism TheformationofTuimuxuktectoniczoneiscloselyrelatedtothecollisionbetweentheIndianplateandtheEurasianplate.Accordingtothetectonicevolutionoftheregion,thecollisionbetweenthetwoplatesbeganintheLateTriassic,whichresultedintheupliftanddeforma