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1、第45卷第6期煤炭科學(xué)技術(shù)Vol?45No?62017年6月CoalScienceandTechnologyJune2017柴達(dá)木盆地北緣反轉(zhuǎn)構(gòu)造特征及其控煤作用分析1,23411黨洪量,滕賢清,費(fèi)德亮,范文科,云啟成(1?青海省地質(zhì)調(diào)查局,青海西寧810001;2?吉林大學(xué)地球科學(xué)學(xué)院,吉林長春130061;3?青海油田公司勘探開發(fā)研究院,甘肅敦煌736202;4?青海煤炭地質(zhì)一○五勘探隊(duì),青海西寧810007)摘要:基于構(gòu)造與煤層賦存狀態(tài)的關(guān)系,為進(jìn)一步認(rèn)識(shí)柴達(dá)木盆地北緣反轉(zhuǎn)構(gòu)造的控煤作用,依據(jù)反轉(zhuǎn)構(gòu)造識(shí)別原則,對(duì)柴達(dá)木盆地北
2、緣各構(gòu)造分區(qū)中典型煤礦區(qū)的地質(zhì)剖面進(jìn)行反轉(zhuǎn)構(gòu)造識(shí)別,并利用平衡剖面技術(shù),探討反轉(zhuǎn)構(gòu)造演化過程的控煤作用。結(jié)果表明:①研究柴達(dá)木盆地北緣普遍認(rèn)識(shí)到該區(qū)在晚侏羅世-白堊紀(jì)發(fā)生過正反轉(zhuǎn)構(gòu)造,但是缺乏地質(zhì)工作程度較高的煤礦區(qū)研究實(shí)例和控煤作用的分析;②通過對(duì)選取的地質(zhì)控制程度較高的地質(zhì)剖面進(jìn)行反轉(zhuǎn)構(gòu)造識(shí)別,將各構(gòu)造分區(qū)的構(gòu)造反轉(zhuǎn)時(shí)限進(jìn)一步厘定晚侏羅世;③反轉(zhuǎn)構(gòu)造的控煤作用在反轉(zhuǎn)前后均有有利條件,反轉(zhuǎn)前為成煤作用提供可容空間,反轉(zhuǎn)后使得發(fā)育較好煤系及煤層的上盤變淺。關(guān)鍵詞:柴達(dá)木盆地北緣;反轉(zhuǎn)構(gòu)造;控煤作用;煤系中圖分類號(hào):P542;P61
3、8.11文獻(xiàn)標(biāo)志碼:A文章編號(hào):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