大杨树盆地九峰山组沉积演化与聚煤规律分析

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1、太原理工大学硕士研究生学位论文九峰山中期溢流相玄武岩的分布特点反映了当时的古地理环境，而古地理环境又直接控制着上覆煤层的分布范围。因此，九峰山中期火山活动特点对古地理环境分析和上覆地层的有利聚煤区域预测具有指向作用。表现为玄武岩快速尖灭反映当时古地理环境地层坡度较大，地层岩相变化大，不利于上覆煤层发育。当玄武岩层厚度稳定延伸宽广反映当时古地理环境地层坡度平缓，上覆煤层稳定发育是有利的聚煤区域。关键词：大杨树盆地，火山间歇喷发，火山活动分析，沉积演化，岩相古地理，聚煤规律太原理工大学硕士研究生学位论文THESTUDYoNSEDlMENTARYEVoL

2、UTloNOFJIUFENGSHANFORMATIoNINDAYANGSHUBASINANDTHEACCUMULATIoNRULESOFCoALABSTRACTBasedontheanalysisofthedrill，loggingdataandthesummaryofpredecessors’achievements，ItindicatesthatDayangshubasinisaMesozoicfaultbasin．Thedeepfaultofthebasinboundarybecontroltheformationanddevelopment

3、ofthebasin．NorthNorthEasttoNorth—Eastnormalfaultsforthemasterfaultinbasin，withahighangle，bigfaultdistance，controlcharacteristicsofthebasinboundary．Theyarenearlyeast—westtrendingnormalfaultscutting，staggered，Formedthetectonicframeworkcharacteristicbedepressionareaandupliftareaf

4、romnorthtosouth．DayangshubasinisaMesozoicfaultbasinthatisbuiltonthePaleozoicinacidicintrusiverocksandmetamorphicbasement．Withthecharacteristicsofintermittenteruptionsvolcanoes—typebasin，formingeruption(earlyCretaceousLongjiangformation)一deposition(earlyCretaceousJiufengshanfor

5、mation)一oncemoreeruption(earlyCretaceousGanheformation)ofthecycleStructureofvolcaniceruption—deposit．TheanalysisthoughtisthestrataofresearchregionoughttobedivideintoProterozoic，Permian，Longjiangformation，Jiufengshanformation，GanheformationoflowerCretaceous，TertiaryandQuaternar

6、yfromoldtonewinDayangshubasin．Themaincoal—bearingstratumisJiufengshanformation，Italsoisthemainanalysisstratum．ThestructureofJiufengshanformationfrombottomtotopmaybedividedintoseveraldifferentdepositsphase：coarseclasticrockfilleddepositintheearlyfaultphase，thetransgressivesyste

7、mtractinpartialcoaldepositionphase，deeplakemudstoneoverlapphaseoflakesfacieandtheregressive太原理工大学硕士研究生学位论文systemtractofoverallshrinkingbasinatmainincoaldepositionphase．Itcanbedistinguishfromarealluvionfan，fandelta，lakesandlakesideswamp．Tectonicandpalaeo—geographyarethemainfact

8、orofcontrolcoalaccumulationinDayangshubasin．Analysisconcluded