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大小:1.33 MB
页数:9页
时间:2020-03-26
《西昆仑造山带中带提热艾力组沉积环境及物源区构造背景.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第5期地质通报Vo1.32.NO.52013年5月GEoLoGICALBULLETINoFCHINAMay,2013西昆仑造山带中带提热艾力组沉积环境及物源区构造背景杜涛l1,侯明才1,,陈琳。,张伟,杨伟。,康孔跃。,李同选。DUTao’。,HOUMing—cai坦,CHENLin。,ZHANGWei,YANGWei,KANGKong—yue3LITong—xuan。,1.油气藏地质及开发工程国家重点实验室(成都理工大学),四川成都610059:2.成都理工大学沉积地质研究院.四川成都610059;3.四川省核工业
2、地质局二八二大队.四川德阳6182001.InstituteofSedimentaryGeology,ChengduUniversityofTechnology,Chengdu610059,Sichuan,China;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation(ChengduUniversityofTechnology),Chengdu610059,Sichuan,China,"3.Ⅳ0.282GeologicalParty,SichuanBu
3、reauofGeologyforNuclearIndustry,Deyang61820~Sichuan.China摘要:西昆仑造山带中带上石炭统提热艾力组为一套浅变质碎屑岩沉积.四周被三叠纪岩浆岩所包围.研究其沉积环境及物源特征对揭示该区构造背景具有重要的意义。通过野外详细的剖面测制、沉积相标志的观察,结合室内岩矿鉴定和地球化学等综合分析,揭示该套碎屑岩具典型的鲍马序列结构特征。岩性成分成熟度低,主要为一套近物源的斜坡重力流沉积,其物源区较为复杂,主要为切割岩浆弧、过渡岩浆弧和再旋回造山带,源区构造环境为大陆岛弧及活动大陆边
4、缘,表现出活动大陆边缘弧后盆地的沉积特点。关键词:西昆仑;提热艾力组;沉积环境;地球化学分析;构造背景中图分类号:P542+.4文献标志码:A文章编号: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.andgeochemicalanalysis.wef0undthatthisclasticdevelopedBoumasequencewhichislowcompositionalma—turity.Thisclasticrocksissetneartheslopesoft
7、heprovenancegravityflowdeposits,andtheprovenanceiscomplex,whichmainlyincludesrecycletransition,dissectedarcandtransitionalarcsourcearea.Thetectonicenvironmentincludeactivecontinentalmarginsandcontinentalislandarc,itdisplaysthecharacteristicofback—arcbasininactiveco
8、ntinentalmargin.Keywords:WestKunlun;Tireailiformation;Depositionalenvironment;Geochemicalanalysis;Tectonicsetting西昆仑造山带位于青藏高原西北部,库地南一级构造单元。西昆仑造山带
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