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ID:32393821
大小:1.38 MB
页数:7页
时间:2019-02-04
《柴达木盆地北缘反转构造特征及其控煤作用分析》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第45卷第6期煤炭科学技术Vol?45No?62017年6月CoalScienceandTechnologyJune2017柴达木盆地北缘反转构造特征及其控煤作用分析1,23411党洪量,滕贤清,费德亮,范文科,云启成(1?青海省地质调查局,青海西宁810001;2?吉林大学地球科学学院,吉林长春130061;3?青海油田公司勘探开发研究院,甘肃敦煌736202;4?青海煤炭地质一○五勘探队,青海西宁810007)摘要:基于构造与煤层赋存状态的关系,为进一步认识柴达木盆地北缘反转构造的控煤作用,依据反转构造识别原则,对柴达木盆地北
2、缘各构造分区中典型煤矿区的地质剖面进行反转构造识别,并利用平衡剖面技术,探讨反转构造演化过程的控煤作用。结果表明:①研究柴达木盆地北缘普遍认识到该区在晚侏罗世-白垩纪发生过正反转构造,但是缺乏地质工作程度较高的煤矿区研究实例和控煤作用的分析;②通过对选取的地质控制程度较高的地质剖面进行反转构造识别,将各构造分区的构造反转时限进一步厘定晚侏罗世;③反转构造的控煤作用在反转前后均有有利条件,反转前为成煤作用提供可容空间,反转后使得发育较好煤系及煤层的上盘变浅。关键词:柴达木盆地北缘;反转构造;控煤作用;煤系中图分类号:P542;P61
3、8.11文献标志码:A文章编号:0253-2336(2017)06-0183-06AnalysisoninversionstructurescharacteristicsandcoalcontrolactioninnorthmarginofQaidamBasin1,23411DangHongliang,TengXianqing,FeiDeliang,FanWenke,YunQicheng(1?QinghaiGeologicalSurvey,Xining810001,China;2?CollegeofEarthScience,Jil
4、inUniversity,Changchun130061,China;3?ResearchInstituteofExplorationandDevelopmentofPetroChinaQinghaiOilFieldCompany,Dunhuang736202,China;4?QinghaiNo.105CoalGeologicalExplorationTeam,Xining810007,China)Abstract:Accordingtocloserelationshipexistedbetweenstructureandcoal
5、seamoccurrencestateinNorthQaidamBasin,inordertofur⁃therunderstandingthecoalcontrollingofinversionstructures,basedontheprincipleofinversionstructures,theinversionstructureofthegeologicalsectionswereidentifiedintypicalcoalmineareasofdifferenttectonicdivisionsinNorthQaid
6、amBasinbyusingbalancedsectiontechnology,thecoalcontrollingintheevolutionprocessofinversionstructurewasalsodiscussedbriefly.TheresultsshowedthatitwaswidelyrecognizedbyresearchersthatthestudyareaoccurredpositiveinversionstructureduringthelateJurassicandCretaceousperiod,
7、andtheresearchwasinshortofsamplesforcoalmineswithadequategeologicalresearchandrelevantanalysisonthefunctionofcoalcon⁃trolling.Throughidentifyingtheinversionstructureonselectedgeologicalsectionswithhighgeologicalcontroldegree,thetimelimitforin⁃versionofeachtectonicpart
8、itionwasfurtherdeterminedaslateJurassicepoch.Thecoalcontrollingcanprovidespaceforthefunctionofcoalformingbeforetheinversiono
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