湖北宜昌黃花場(chǎng)奧陶紀(jì)地層與沉積相分析.pdf

1、分類(lèi)號(hào)：P57W58＼P611071020050898壤步犬海碩士學(xué)位論文導(dǎo)師姓名職稱(chēng)申請(qǐng)學(xué)位級(jí)別論文提交日期學(xué)位授予單位湖北宜昌黃花場(chǎng)奧陶紀(jì)地層與沉積相分析高雪蓮蘇春乾副教授楊志華教授碩士學(xué)科專(zhuān)業(yè)名稱(chēng)礦物學(xué)、巖石學(xué)、礦床學(xué)——論文答辯日期——長(zhǎng)安大學(xué)答辯委員會(huì)主席學(xué)位論文評(píng)閱人AbstractYichangcityislocatedinwesternHubeiProvince，issituatedatintersectionpoint

2、ofupstreamYangtzeRiverandthemiddlereaches，thetransitionzonefrommountainareatotheplainareaTakingQingfengXiangguangfractureasdemarcationline，itcandivideintosouthemYangzistrataareaandnorthernSouthQinling—DabieMountainstrata

3、area，YichangislocatedontheYangzistratadistrict，thegeologicalchangearefewthestratadistributionisextensive，fromtheProterozoicgroups1800MaagotoCenozoicgroups1Maago，alsothegrowthintegrityappearingiscompleteThisresearchareaof

4、YichangHuanghuachangislocatedtheeastlimboftheHuanglinganticline，isinthemiddle—northoftheYangzicarbonateplatforminOrdovicianNotonlytheHuanghuachangOrdoviciansystemsectionplanethestructureissimple，thestratagrowthisintegrit

5、yeachclassoffossilisalsoextremelyrich，theresearchdegreeishigh，isalsothetypicalprofileofOrdoviciansystemdivisionandthecontrast，butalsoistheboundarystratotypesectionofDawanstage，simultaneouslytheglobalmostperfectboundaryst

6、ratotypesectionofmiddle10werOrdovicianThroughthegeologysurveyintheopenairandstudyingandcontrastingOrdoviciansystemstratadivision，thelothologicalcharacteristics，speciallythesedimentaryfaciessymbolresearch，connectingwithpr

7、edecessorsresearchresults，ithasestablishedtheYichangHuanghuachangdepositionfaciesmodelofOrdovicianperiodrestoredtheenvironmentofdepositionthen，hasmadecleartheevolutionofpaleogeographyandthefluctuationchangeofsealevelthen

8、Ordovicianperiod，epicontinentalseaspreadouttheHuanghuachangareainYichang，Hubeiprovince，itischaracteristicsofbroaddistribution，shallowseawaterandgentleseabedslope，indicatesthatisstablesurroundings，formingthesuitstratumtha

9、tismainlycarbonatiteThesedimentmodeisbelongstoshoreepicontinentalsea、Scarbonatiteassembleprincipallyincludingbasinfacies，widecontinentalshelffacies，basinmarginalfacies，mesamarginalbiohermalfacies，mesamarginalrifflefacies

10、，wideseamesafaciesandlimitedseamesafaciesThetransgressioncontinuousexpandingandseawaterconstantdeepingfromXilinxiaFormationtoWufengFormation，andhavemulti—gyrephenomenoninseawateradvanceandretreatTheaggradationisdividedin