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1、第32卷第6期河南理工大學(xué)學(xué)報(bào)(自然科學(xué)版)Vo1．32NO．62013年12月JOURNALOFHENANP0LYTECHNICUNIVERSITY(NATURALSCIENCE)Dec．2013魯西南蒙陰盆地古近系沉積特征及沉積環(huán)境鄭德順，高林，李明龍，周璐，程涌，張飛鵬(1．河南理工大學(xué)資源環(huán)境學(xué)院河南焦作454000；2．湖北省第二地質(zhì)大隊(duì)湖北恩施445000)摘要：運(yùn)用沉積學(xué)和沉積地球化學(xué)方法對蒙陰盆地古近系進(jìn)行了沉積特征及沉積環(huán)境演化研究，結(jié)果表明，蒙陰盆地常路組(E1“．E2ch)反映了河流和濱淺湖沉積環(huán)境，常一段的河流沉積較發(fā)育，常二
2、段以濱淺湖為主，有沼澤化含煤和黏土沉積，常三段為濱湖沉積；W(V)／w(V+Ni)，W(Sr)／w(Ba)，W(Mg)／w(Ca)等地球化學(xué)指標(biāo)反映出常路組沉積時(shí)期雖總體處于水體弱分層的淡水環(huán)境，氣候濕潤，但存在小的波動(dòng)，古鹽度與古水深呈顯著負(fù)相關(guān)關(guān)系，與蒙陰盆地古近紀(jì)封閉的山間盆地性質(zhì)相吻合．此后的朱家溝組(E2zh)為常路組沉積后地形迅速抬升的山麓沖洪積體系．蒙陰盆地古近紀(jì)演化過程主要受太平洋板塊的俯沖影響而發(fā)生右行走滑的沂沭斷裂和蘭聊斷裂的活動(dòng)控制．關(guān)鍵詞：沉積環(huán)境；地球化學(xué)；蒙陰盆地；古近系中圖分類號：P534．62文獻(xiàn)標(biāo)識碼：A文章編號：1
3、673．9787(2013)06．0696-07AnalysisonsedimentarycharacteristicsandenvironmentsofPaleogeneinMengyinbasin，southwesternShandongprovinceZHENGDes．hun，GAOLin，LIMing．1ong，ZHOULu，CHENGYong，ZHANGFei．peng(1．SchoolofResourcesandEnvironment，HenanPolytechnicUniversity，Jiaozuo454000，Henan，China
4、；2．No．2GeologicalBrigadeofHubeiProv—ince，Enshi445000，Hubei，China)Abstract：ResearchesonpaleogeneofMengYinBasinweremainlyconcentratedinstratigraphicdivisionandcorrelation，andfewinasedimentaryenvironment．Thesedimentarycharacteristicsandenvironmentsofpaleo—genearestudiedusingthemet
5、hodsofsedimentologyandgeochemistry．Theresultsshowthat：ChangLuf0rma-tioninMengyinbasin(E1“一E2ch)isdevelopedwiththefluvialandshore-shallowlacustrinefacies，andChang一1memberismainlydevelopedwithfluvialdeposits；memberChang-2iswithshore—shallowlacustrinefacieswithswampingcoal-bearing
6、claydepositsandChang一3memberiswithfloodinglakeshoredeposit．Thegeochemicalindicatorssuchasw(V)／w(V+Ni)，W(Sr)／w(Ba)，W(Mg)／w(Ca)showthatthedepositsofChangLuformationwasmainlyunderahumidclimateandafreshwaterenvironment，existingsmallfluctua—tions．Therewasasignificantnegativecorrelat
7、ionbetweenpaleosalinityandwaterdepth，asMengyinbasinwasaclosedintermountainbasinduringPaleogene．TheZhujiagouformation(E2zh)belongstothesedi—mentsofpiedmontalluvialfanwithorographicupliftafterChangLuperiod．TheevolutionofMengyinbasinduringPaleogenewascontrolledbythedextralstrike—s
8、lipoftheYishufaultandLanliaofault，withthesflbduc-tiono
