华北泥河湾盆地郝家台地区的沉积相组合特征：以台儿沟东剖面为例-论文.pdf

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1、第19卷第4期地学前缘(中国地质大学(北京)；北京大学)V01．19No．42012年7月EarthScienceFrontiers(July2012．ChinaUniversityofGe0sciences(Beijing)；PekingUniversity)华北泥河湾盆地郝家台地区的沉积相组合特征：以台儿沟东剖面为例陈兴强，迟振卿一，闫臻，王永，闵隆瑞，姚培毅，董进，姚杜琳1．中国地质大学(北京)地球科学与资源学院，北京1000832．中国地质科学院地质研究所，北京100037ChenXingq

2、iang，ChiZhenqing一，YanZhen，WangYong，MinLongrui，YaoPeiyi，DongJin．YaoDulin’。1．SchoolofEarthSciencesandResources，ChinaUniversityofGeosciences(BeOing)，Beijing100083，China2．InstituteofGeology，ChineseAcademyofGeologicalSciences，Beijing100037，ChinaChenXingqian

3、g，ChiZhenqing，YanZhen，eta1．FeaturesofsedimentaryfaciesoftheNihewanBasininNorthChina：Anex—amplefromtheEasternTaiergousection．EarthScienceFrontiers，2012，19(4)：227—238Abstract：TheeasternTaiergousectionislocatedintheeastofEasternNihewanBasininNorthChina．Th

4、emainstrataofthissectionbelongtoPleistoceneandPliocene．PleistoceneHaojiataiandNihewanformationsunderlietheMalanloessandpalaeosolstrata，whichexposedonthetopoftheeasternTaiergousectionwith9．4minthickness，andoverliethePlioceneYuxianFormation．Bothsedimenta

5、rytexturesandlithofaciessim—ultaneouslysuggestthattheHaojiataiandNihewanformationsshouldbedominatedbythedeltaplainanddeltafrontsubfaciesdeposits，withminorprodeltadeposits．Thedeltaplainsubfaeiesconsistsofclistributarychan—Del，bifurcatedriverbend，natural

6、1evee，marshandfreshwaterlakemierofacies．Theyarecharacterizedbylenticularcoarse-grainedsandandgraveldepositswithlargetabularcross-beddingandbasalerosionscouringstructure，yellowish-brownmedium-finedsandylenticleswithcalcareousconcretions，anddarkclaywitha

7、bun—dantcarbonclasts．Thedeltafrontdeposits，whichconsistofbranchchannel，channelbay，rivermouthsandbars，andendbarofbranchingchannelmicrofacies，arecharacterizedbybasalerosionscouringstructure，len—tieularlymedium-finedsanddepositswithgravels，fine-grainedsan

8、ddepositswithsmalltabularcross-bed—dings，andwell-sortedfine-grainedquartzsands．Theprodeltaislessdevelopedrelatively，whichmainlycon—sistsoflight-grayday，greenandgrayclaywithcalcareousconcretion．TheYuxianFormationcontainsshoreandshallow-l