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1、第29卷第6期地球科学———中国地质大学学报Vol.29No.62004年11月EarthScience—JournalofChinaUniversityofGeosciencesNov.2004大地构造相在东昆仑造山带地质填图中的应用张克信,朱云海,殷鸿福,王国灿,陈能松,侯光久中国地质大学地球科学学院,湖北武汉430074摘要:不同的造山带是由不同的大地构造相单元组合而成,大地构造相的划分揭示了造山带的基本框架和形成演化的规律.在对东昆仑造山带1∶25万冬给措纳湖幅地质填图中,以时间演化和大地构造背景为主线,根据不同演化阶段、不同部位出现的构造古地理单元、盆地类型和物质建造类型,对
2、填图区大地构造相进行了较精细深入划分,共划分出七大相类、21种相,如扩张洋脊相、分支(扩张)海槽相、碳酸盐岩海山相、碳酸盐岩台地相、深海平原相、大陆碎块相、前陆盆地相和磨拉石盆地相等,编制了1∶25万冬给措纳湖幅大地构造相图和造山作用过程与大地构造相演变图.大地构造相在地质填图中的应用进一步深化了造山带填图中的地层单元空间配置关系和盆地沉积充填序列的研究,较全面细致地揭示了东昆仑造山带东段造山带形成、物质组成及演化过程.关键词:大地构造相;造山带;东昆仑;地质填图.中图分类号:P54文章编号:1000-2383(2004)06-0661-06收稿日期:2004-08-26Applica
3、tionofTectonicFaciesinGeologicalMappinginEastKunlunOrogenicBeltZHANGKe2xin,ZHUYun2hai,YINHong2fu,WANGGuo2can,CHENNeng2song,HOUGuang2jiuFacultyofEarthSciences,ChinaUniversityofGeosciences,Wuhan430074,ChinaAbstract:Differentorogenicbeltsarecomposedofdifferenttectonicfaciesunits.Thedivisionoftecton
4、icfaciesrevealsthebasinskeletonandtheevolutionrulesofanorogenicbelt.In1∶250000geologicalmappingoftheDonggiConagHuareaintheEastKunlunorogenicbelt,consideringthetimingevolutionandtectonicsettingasthemainclues,andaccordingtothetectono2paleo2geography,basintypeandmatterconstructiontypeindifferentevo
5、lutionstages,wedividethetectonicfaciesintosevenbigfaciesincluding21smallfacies,suchasextensionaloceanicridgefacies,offset(extensional)troughfacies,carbonateseamountfacies,carbonateplatformfacies,abyssalplainfacies,continentalsliverfacies,forelandbasinfacies,molassesbasinfaciesandsoon.Fromthisres
6、earchwehaveproduceda1∶250000tectonicfaciesdiagramoftheDonggiConagHuarea,anddiagramswhichdisplaytheorogenicprocessesandtectonicfaciesevolution.Theapplicationoftectonicfaciesingeologicalmappingdeepensthestudyofthespatialrelationofstrataunitsandbasinfillingsequencesduringorogenicmapping,andwereveal
7、theforming,substancecomposi2tionandevolutionprocessesoforogenicbeltsintheeastpartoftheEastKunlunorogenicbeltindetail.Keywords:tectonicfacies;orogenicbelt;EastKunlunarea;geologicalmapping.对具有复杂演化历史的造山带,由于其漫长造程:多旋回、多岛洋、软碰撞(殷鸿福