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1、太原理工大學(xué)碩士研究生學(xué)位論文九峰山中期溢流相玄武巖的分布特點(diǎn)反映了當(dāng)時的古地理環(huán)境，而古地理環(huán)境又直接控制著上覆煤層的分布范圍。因此，九峰山中期火山活動特點(diǎn)對古地理環(huán)境分析和上覆地層的有利聚煤區(qū)域預(yù)測具有指向作用。表現(xiàn)為玄武巖快速尖滅反映當(dāng)時古地理環(huán)境地層坡度較大，地層巖相變化大，不利于上覆煤層發(fā)育。當(dāng)玄武巖層厚度穩(wěn)定延伸寬廣反映當(dāng)時古地理環(huán)境地層坡度平緩，上覆煤層穩(wěn)定發(fā)育是有利的聚煤區(qū)域。關(guān)鍵詞：大楊樹盆地，火山間歇噴發(fā)，火山活動分析，沉積演化，巖相古地理，聚煤規(guī)律太原理工大學(xué)碩士研究生學(xué)位論文THESTUDYoNSEDlMENTARYEVoL
2、UTloNOFJIUFENGSHANFORMATIoNINDAYANGSHUBASINANDTHEACCUMULATIoNRULESOFCoALABSTRACTBasedontheanalysisofthedrill，loggingdataandthesummaryofpredecessors’achievements，ItindicatesthatDayangshubasinisaMesozoicfaultbasin．Thedeepfaultofthebasinboundarybecontroltheformationanddevelopment
3、ofthebasin．NorthNorthEasttoNorth—Eastnormalfaultsforthemasterfaultinbasin，withahighangle，bigfaultdistance，controlcharacteristicsofthebasinboundary．Theyarenearlyeast—westtrendingnormalfaultscutting，staggered，F(xiàn)ormedthetectonicframeworkcharacteristicbedepressionareaandupliftareaf
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太原理工大學(xué)碩士研究生學(xué)位論文systemtractofoverallshrinkingbasinatmainincoaldepositionphase．Itcanbedistinguishfromarealluvionfan，fandelta，lakesandlakesideswamp．Tectonicandpalaeo—geographyarethemainfact
8、orofcontrolcoalaccumulationinDayangshubasin．Analysisconcluded
