鄂尔多斯东胜矿区色连井田延安组层序地层分析.pdf

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1、第37卷增刊2煤炭学报Vo1．37Supp．22012年10月JOURNALOFCHINAC0ALSOCIETY0ct．2012文章编号：0253—9993(2012)s2—0383—07鄂尔多斯东胜矿区色连井田延安组层序地层分析史勇，焦风海，王超勇，刘永芳(1．同煤浙能麻家梁煤业有限责任公司，山西朔州036000；2．内蒙古同煤鄂尔多斯矿业投资有限公司，内蒙古鄂尔多斯017000；3．中国矿业大学资源与地球科学学院，江苏徐州221008)摘要：通过对色连井田内主要含煤地层侏罗系中统延安组钻孔测井资料、钻探岩芯及含煤地层孢粉组合的综合分析，认为：孢粉组合符合

2、延安组孢粉特征；以沉积拐点或岩性拐点为层序界面，对研究区进行层序地层的划分和对比，将延安组划分为1个长期基准面旋回，5个中期基准面，以及10～15个短期基准面旋回，大致对应于煤层(或煤线)。在此基础上建立了等时地层格架。探讨了短期基准面的叠置方式和层序特征，分析了层序的成因控制因素，认为短期基准面旋回主要由自旋回控制，中期基准面和长期基准面旋回由构造、气候和沉积物供给综合控制。关键词：色连井田；延安组；高分辨率层序地层；孢粉；测井曲线；沉积旋回中图分类号：P539．2文献标志码：ASequencestratigraphyregularityinYan’anF

3、ormationofSelianMinefieldofDongshengdistrictinOrdosBasinSHIYong，JIAOFeng—hai，WANGChao—yong，LIUYong—fang(1．MaJialiangMineCompanyJoint-stockbyDatongCoalIndustryandZhefiangProvincialEnergyCo．，Ltd．，Shuozhou036000，China；2．InnerMongoliamininginvestmentCompanybyDatongCoalIndustryCo．，Ltd．，

4、Ordos017000，China；3．SchoolofResource&眈Science，ChinaUniversityofMiningandTechnology，Xuzhou221008，China)Abstract：Comprehensiveanalysisoftheloggingcurves，drillingcoresandsporopollenassemblageinmaincoal—bear．ingstrataoftheYah’anFormationinmiddleJurassicofSelianminefield，consideredthats

5、poropollenassemblageisconsistentwiththepalynologicalcharacteristicsoftheYan’anFormation，divisionandcorrelationandsequencestrati．graphicusedthedepositionandlithologyinflectionpointbethesequenceboundariesinthestudyarea，theYan’anFormationcanbedividedintoalong-termcycle，segmentedintofi

6、vemiddlecycles，andtentofifteenshort—termcy—cles，roughlycorespondstothestrataofcoalseam(orseamline)．Establishedtheisochronoussequencestratigraphyframeworkinthisbasis，discussedonthesuperimposedpatternandsequencecharacteristicsofshort—termbase．1evel，andthecausesofthefactorsthatcontrol

7、thesequence，consideredthattheshort—termbase—levelcyclesiscontroledbyautogeneticcycle，themedium—termbaselevelandlong·termbaselevelcycleareintegratedcontrolledbytectonics，cli—mateandsedimentsupply．Keywords：SelianMinefiecd；Yan’anFormation；high—resolutionsequencestratigraphy；sporopolle

8、n；loggingcurves；sedimentar