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时间:2020-03-26
《青海巴颜喀拉山北麓古高位湖相沉积的分布与特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第28卷第5期地质通报Vo1.28.NO.52009年5月GE0LoGICALBULLETINOFCHINAMay,2009青海巴颜喀拉山北麓古高位湖相沉积的分布与特征朱大岗,邵兆刚,孟宪刚,雷伟志,王津,韩建恩,余佳,吕荣平,钱程ZHUDa—gang,SHAOZhao—gang,MENGXian—gang,LEIWei—zhi,WANGJin,HANJian—an,YUJia,LUILong—ping,QIANCheng中国地质科学院地质力学研究所,国土资源部新构造运动与地质灾害重点实验室,北京100081KeyLaboratory
2、ofNeotectonicMovementandGeohazard,Min~tryofLandandResources;InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China摘要:巴颜喀拉山北麓地区古湖岸线分布广泛。湖相沉积与湖成地貌发育。目前,在扎陵湖和鄂陵湖沿岸可清晰地划分出4级湖岸阶地、多级湖相沉积和古高位湖相沉积。古高位湖相沉积出露的最高海拔为4615m,分别高出现代扎陵湖水面328m、鄂陵湖水面346m;在扎陵湖和鄂陵湖谷地
3、分布着多级湖岸堆积阶地或基座阶地、多级湖相沉积和古高位湖相沉积;在小野马岭、大野马岭、扎陵湖北等地的基岩山丘上。也发育有多级湖相沉积和古高位湖相沉积,其古高位湖相沉积高出现代扎陵湖和鄂陵湖湖面50"-'350m巴颜喀拉山北麓古高位湖相沉积的形成时代可能为中更新世。关键词:扎陵湖和鄂陵湖;古高位湖相沉积;分布与特征;中更新世;巴颜喀拉山北麓中图分类号:P512.2:P512.32文献标志码:A文章编号:1671-2552(2009)05-0549—07ZhuDG,ShaoZG,MengXG,LeiWZ,WangJ,HanJE,YuJ,L
4、iiRP,QianC.Thedistributionandcharacteristicsoflacustrinesedimentationfromancienthi【ghlevellakeatthenorthfootofMt.Bayankala,Qinghai,China.GeologicalBulletinofChina,2009,28(5):549-555Abstract:TheancientlakelinesaredistributedextensivelyatnorthfootofMtBayankala.alsothelake
5、sedimentsandlacustrinetO—pography.Atpresent,4levelsoflaketerraces,multi—leveloflakesedimentsandl1ighlevelpaleo—lacustrinesedimentationcanbeclearlyobservedaroundtheshoreofLakeZhalingandLakeEhng.Exposedmaximumaltitudeoflakesedimentsis4615meters,ex-ceeding328metersofthemod
6、emLakeZhalingand346metersoftheLakeEling.Multi—levellakeshorepiledterracesorbaseterrace,lakesedimentsandhighlevelpaleo—lacustrinesedimentsdistributeintheLakeZhalingandLakeElingvalleybasin.Multi—levelpale-O-lacustrinesedimentsandhighlevelpaleo—lacustrinesedimentationwhose
7、altitudesareabout50mtO350mabovemodemLakeZhalingandLakeElingdistributelocallyatbedrockhillsofXiaoyemaling,Dayemalin,LakeZhalingnorthandotherareas.TheformingageofthelacustrinesedimentationfromancienthilevellakeatthenorthfootofMt.BayankalacouldbemiddlePleistoceneepoch.Keyw
8、ords:ZhalingLakeandEhngLake;lacustrinesedimentationfromancientb5ghlevellake;distributionandcharacteristics;mid
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