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大小:1.61 MB
页数:7页
时间:2019-11-22
《柴达木盆地三湖地区第四系构造发育历史及其勘探意义》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、2012年6月,第18卷,第2期,372—378页高校地质学报June2012,Vo1.18,No.2,P.372-378GeologicalJournalofChinaUniversities柴达木盆地三湖地区第四系构造发育历史及其勘探意义郭泽清,孙平2,张绍胜,田继先,孔骅1.中国石油勘探开发研究院。北京1000832.中国石油勘探开发研究院廊坊分院天然气地质所,廊坊065007摘要:地层厚度能够反映构造沉降及隆升。通过对柴达木盆地东部三湖地区探井统一分层后,计算现今地层厚度,然后分期平面成图。这些图件揭示出三湖地区北斜坡背斜构造形成历史并不统一,具有由北东向南西
2、依次发育的特征:伊克雅乌汝、南陵丘、驼峰山背斜最早成型,是第四纪以来的同沉积背斜。kl1沉积后,台吉乃尔和涩北二号才开始形成,接着涩北一号形成,而台南背斜形成最晚。涩东鼻状构造是在k1以后才抬升的,而南斜坡至今未形成背斜构造;而且隆升速度也是不均衡的,具有逐渐加强的趋势,尤其是更新统末期(k5以后)背斜构造快速抬升。该地区构造演化历史的确定,对于寻找背斜构造形成的有利区带具有指导意义。关键词:三湖地区;地层厚度;背斜构造;发育历史;勘探意义;第四系中图分类号:P618.130.2文献标识码:A文章编号:1006—7493(2012)02—0372—07Studyont
3、heQuaternaryTectonicEvolutionandItsSignificanceforExplorationintheSanhuArea,QaidamBasinGUOZeqing’,SUNPing,ZHANGShaosheng,TIANJixian,KONGHua1.ResearchInstituteofPetroleumExplorationandDevelopment,CNPC,Beijing100083,China;2.LangfangBranch,ResearchInstituteofPetroleumExplorationandDevelopm
4、ent,CNPC,Langfang065007,ChinaAbstract:Stratumthicknesscanreflecttectonicsubsidenceand/oruplift.AftercompilingstratigraphicdataofallwellsintheSanhuareaofQaidambasin,thepresentstratumthicknesswascalculated,andisopachmapsofdifferentperiodsweredrawed.Thesemapsshowthattheformationhistoryofth
5、eanticlinewasnotuniform,andthestructurestartedtoformfromthenortheasttothesouthwest.Yikeyawuru,NanLinqiu,andTuoFengshananticlineswereformedfirstandtheyhavebeenthesyn—depositionalanticlinesincetheQuatemary.ThenTaijinaierandSebei2begantouplift,whichwasfollowedbySebei2.Tainananticlinewasthe
6、youngestandSedongnosestructurebegantoupliftafterklwasdeposited.Noanticlineswereformedinthesouthernslopeuntiltoday.Thespeedsoftheirupliftarenoteven,andthespeedgraduallyincreased,especially,theanticlineshadatendencyforrapidupliftafterk5wasdeposited.Theunderstandingoftectonicevolutionhisto
7、ryisveryhelpfultosearchforfavorablezoneswherelow—amplitudestructuresweredeveloped.Keywords:Sanhuarea;stratumthickness;anticline;evolutionhistory;QuaternaryexplorationsignificanceCorrespondingauthor:GuoZeqing,Ph.DCandidate;E—mail:zzyhe@163.com收稿日期:2011-10—20;修回日期:2012—06—23基金项目:
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