25487.鄂爾多斯盆地東南部延長組沉積相研究

1、西北大學(xué)碩士學(xué)位論文鄂爾多斯盆地東南部延長組沉積相研究姓名：范萌萌申請學(xué)位級別：碩士專業(yè)：礦物學(xué)、巖石學(xué)、礦床學(xué)指導(dǎo)教師：李文厚20100604ResearchonSedimentaryFaciesofYanchangFormationintheSoutheastofOrdosBasinAbstractBasedonthepreviousresearchresultsandexplorationdataandguidedbyfundam

2、entalsedimentologicaltheoryandmeans，thepaperstudiesthesourcedirection，sedimentaryfaciestypesanddistributionofsedimentaryfaciesofUpperTriassicYanchangFormationinthesoutheastpartofOrdosBasinonthebasisofgeophysics，geochemis

3、try，basinanalysisandancientlandscaperestoration，combinedoutcrops，coresandwellloggingdataIntheCOurSeofthepartitionandcontrastofYanchangformation，4primarymarkerbedsand2assistantmarkerbedsaresearchedfirstlywhichdistributest

4、eadilyinthewholeareaThestratumcouldbedividedintonineoillayers，followingtheprinciplesthatcontrastingthebigsectionsfirstlythensmallsections，beingcontrolledbycycle，consultingthethickness，etcBasedonoutcropobservation，coredes

5、cription，singlewellfaciesandcomparisonofconnecting—wellsections，combined謝t11rocktype，sedimentarytexture，structure，paleontologysedimentarycycle，etc，thepaperpointsoutthatthemainfaciesdevelopedinstudyareaofUpperTriassicYanc

6、hangFormationarelakefaciesanddeltafacies，whichCanfurtherdevidedinto4typesofsubfaciesand10typesofmicrofaciesOnthebasisofregionalgeologicbackground，lightandheavyminerals，palaeocurrentandrocktraceelementcharacteristics，thep

7、aperbelievesthatYanchangFormationhasthenortheastandsouthprovenancesThenortheastonewasfromdeepmetamorphicschistandgneissofArcheanWulashanGroupandLowerProterozoicErdaoaoGroupofYinshanandDaqingshanareainthenorthborderofOrdo

8、sBasinThesouthonewasfrommetamorphicrockofpalaeohighandshallowmarineelasticrockandcarbonaterockofUpperandLowerPaleozoicinQinlingregion，thesouthborderofOrdosBasinInstudyareatherearetwomainsedimentarysystemsinthenortheastan