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1、第32卷第5期地質(zhì)通報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)工程國家重點實驗室(成都理工大學),四川成都610059:2.成都理工大學沉積地質(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.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.四周被三疊紀巖漿巖所包圍.研究其沉積環(huán)境及物源特征對揭示該區(qū)構(gòu)造背景具有重要的意義。通過野外詳細的剖面測制、沉積相標志的觀察,結(jié)合室內(nèi)巖礦鑒定和地球化學等綜合分析,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大陸邊
4、緣,表現(xiàn)出活動大陸邊緣弧后盆地的沉積特點。關鍵詞:西昆侖;提熱艾力組;沉積環(huán)境;地球化學分析;構(gòu)造背景中圖分類號:P542+.4文獻標志碼:A文章編號: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,庫地南一級構(gòu)造單元。西昆侖造山帶