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《西昆侖造山帶中帶提熱艾力組沉積環(huán)境及物源區(qū)構(gòu)造背景.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第32卷第5期地質(zhì)通報(bào)Vo1.32.NO.52013年5月GEoLoGICALBULLETINoFCHINAMay,2013西昆侖造山帶中帶提熱艾力組沉積環(huán)境及物源區(qū)構(gòu)造背景杜濤l1,侯明才1,,陳琳。,張偉,楊偉。,康孔躍。,李同選。DUTao’。,HOUMing—cai坦,CHENLin。,ZHANGWei,YANGWei,KANGKong—yue3LITong—xuan。,1.油氣藏地質(zhì)及開發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室(成都理工大學(xué)),四川成都610059:2.成都理工大學(xué)沉積地質(zhì)研究院.四川成都610059;3.四川省核工業(yè)
2、地質(zhì)局二八二大隊(duì).四川德陽6182001.InstituteofSedimentaryGeology,ChengduUniversityofTechnology,Chengdu610059,Sichuan,China;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation(ChengduUniversityofTechnology),Chengdu610059,Sichuan,China,"3.Ⅳ0.282GeologicalParty,SichuanBu
3、reauofGeologyforNuclearIndustry,Deyang61820~Sichuan.China摘要:西昆侖造山帶中帶上石炭統(tǒng)提熱艾力組為一套淺變質(zhì)碎屑巖沉積.四周被三疊紀(jì)巖漿巖所包圍.研究其沉積環(huán)境及物源特征對(duì)揭示該區(qū)構(gòu)造背景具有重要的意義。通過野外詳細(xì)的剖面測(cè)制、沉積相標(biāo)志的觀察,結(jié)合室內(nèi)巖礦鑒定和地球化學(xué)等綜合分析,揭示該套碎屑巖具典型的鮑馬序列結(jié)構(gòu)特征。巖性成分成熟度低,主要為一套近物源的斜坡重力流沉積,其物源區(qū)較為復(fù)雜,主要為切割巖漿弧、過渡巖漿弧和再旋回造山帶,源區(qū)構(gòu)造環(huán)境為大陸島弧及活動(dòng)大陸邊
4、緣,表現(xiàn)出活動(dòng)大陸邊緣弧后盆地的沉積特點(diǎn)。關(guān)鍵詞:西昆侖;提熱艾力組;沉積環(huán)境;地球化學(xué)分析;構(gòu)造背景中圖分類號(hào):P542+.4文獻(xiàn)標(biāo)志碼:A文章編號(hào):1671—2552(2013)05-0751—09DuT,HouMC,ChenL,ZhangW,YangW,KangKY,LiTX.DepositionalenvironmentandtectonicsettingofsourceareaofTireailiformationinthemiddlewestKunlunorogenicbelt.GeologicalBulleti
5、nofChina,2013,32(5):751—759Abstract:AsectionofUpperCarboniferouslow——grademetamorphicclasticrocksintheTireailiformationisfoundinthemiddlewestKunlunorogenicbelt.ItissurroundedbytheTriassicigneousrocks.Studyofdepositionalenvironmentandsourcecharacteristicsofsedimenti
6、nthisformationissignificanttOtectonicsettingofthisarea.Throughfineprofilemeasuring,sedimentaryfaciessigns,mineralidentification.a(chǎn)ndgeochemicalanalysis.wef0undthatthisclasticdevelopedBoumasequencewhichislowcompositionalma—turity.Thisclasticrocksissetneartheslopesoft
7、heprovenancegravityflowdeposits,andtheprovenanceiscomplex,whichmainlyincludesrecycletransition,dissectedarcandtransitionalarcsourcearea.Thetectonicenvironmentincludeactivecontinentalmarginsandcontinentalislandarc,itdisplaysthecharacteristicofback—arcbasininactiveco
8、ntinentalmargin.Keywords:WestKunlun;Tireailiformation;Depositionalenvironment;Geochemicalanalysis;Tectonicsetting西昆侖造山帶位于青藏高原西北部,庫(kù)地南一級(jí)構(gòu)造單元。西昆侖造山帶