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1、第34卷第3期河北工程大學(xué)學(xué)報(自然科學(xué)版)Vol.34No.32017年09月JournalofHebeiUniversityofEngineering(NaturalScienceEdition)Sep.2017文章編號:1673-9469(2017)03-0079-06doi:10.3969/j.issn.1673-9469.2017.03.017木里煤田構(gòu)造特征及沉積充填過程研究11211譚富榮,魏云迅,劉偉剛,杜芳鵬,雒錚(1.中國煤炭地質(zhì)總局航測遙感局,陜西西安710199;2.陜西省能源化工研究院,陜西西安710054)摘要:通過研究木里煤田構(gòu)造特征、沉積充填序列來探
2、討研究區(qū)侏羅紀(jì)以來構(gòu)造-沉積演化過程。研究結(jié)果表明:(1)研究區(qū)發(fā)育兩組斷裂——北西西向—北西向逆沖斷斷裂和北東—南西向右行走滑斷裂,北西西向—北西向斷裂相對發(fā)育,定型于晚燕山期;北東—南西向右行走滑斷裂定型較晚,屬喜馬拉雅期的產(chǎn)物。褶皺形態(tài)以線狀褶皺和等厚褶皺為主,屬喜馬拉雅期的產(chǎn)物。斷裂-褶皺構(gòu)成了單向沖斷型復(fù)式向斜、單向沖斷型復(fù)式背斜、對沖型復(fù)式向斜;(2)木里煤田侏羅系主要發(fā)育三角洲相、曲流河相、湖泊相;(3)木里煤田經(jīng)歷了斷陷沉積期(侏羅紀(jì))、隆升剝蝕期(白堊紀(jì)-漸新世)、廣盆沉積期(中新世)、褶皺沖斷期。關(guān)鍵詞:木里煤田;構(gòu)造特征;沉積充填;構(gòu)造-沉積演化中圖法分類號:
3、P618.11文獻(xiàn)標(biāo)識碼:AThetectoniccharacteristicsandsedimentaryfillingprocessofMulicoalfield11211TANFurong,WEIYunxun,LIUWeigang,DUFangpeng,LUOZheng(1.AerialPhotogrammetryandRemoteSensingCenter,ChinaNationalAdministrationofCoalGeology,Xi’an,710199,China;2.ShaanxiPovincialInstituteOfEnergyResourceChemica
4、lEngineerring,Xi’an,710069,China)Abstract:Bystudyingstructurecharacteristicsandsedimentary?llingsequences,thispaperdiscussestheJurassictectonicandsedimentaryevolutionprocessthestudyarea,providesthebasisforexplorationandexploitationofcoalresourcesinMuliCoalfield.Theresultshowsthat:therearetwogr
5、oupsoffaultsintheresearcharea,whichareNW-NWWthrustfaultandNE-SWrightlateralstrikeslipfault.NWW-NWfaultformedinthelateofYanshanperiodisdeveloped.NE-SWrightlateralstrikeslipfaultislateranditistheoutcomeofHimalaya.Foldmorphologyislinearfoldsandthickfolds,whichistheresultsofHimalaya.Fault-foldcons
6、titutesaone-waythrusttypecompoundsyncline,one-waythrusttypecompoundanticline,hedgetypecompoundsyncline.Deltafacies,meanderingriverfaciesandlakefaciesarethemainsedimentaryfaciesinJurassicofMuliCoalfield.Thecoalfieldwentthroughofriftsedimentaryperiod(Jurassic),theperiodofupliftanddenudationstage
7、(cretaceousandtheOligocene),widebasinsedimentaryperiod(Miocene),andtheperiodofFold-thrustKeywords:MuliCoalfield;Tectoniccharacteristics;sedimentary;Structural-sedimentaryevolution木里煤田位于青藏高原東北緣,是青海省兩大疊加復(fù)合、改造的木里煤田整個區(qū)域斷裂-褶皺組重要的煤炭資源分布區(qū)之一。眾多