古地理学报2016，Vol.18Issue(5)：731-742,12.DOI:10.7605/gdlxb.2016.05.055
塔里木盆地北部地区奥陶系层序地层格架与沉积演化
Sequence stratigraphic framework and sedimentary evolution of the Ordovician in northern Tarim Basin
摘要
Abstract
According to the theory and approach of sequence stratigraphy and sedimentary petrology, based on thorough analysis of the data of cores,thin sections,well logging in the three tectonic units of Lunnan,Halahatang,Yingmaili in northern Tarim Basin,combining with the previous study on main tec-tonic events and sea level changes,the sequence stratigraphic framework was estabished and the sedimen-tary characteristics and evolution were described.According to the regional unconformity surface,two 2nd-order sequences,SSQ1 and SSQ2,were identified.SSQ1 included the Lower and Middle Ordovician, SSQ2 included the Middle and Upper Ordovician.And then,on the basis of lithologic characteristics and lithofacies converting surfaces,eleven 3rd-order sequences (OSQ1 -OSQ1 1 ) were identified.Further, according to the main marine flooding surfaces,the sequences were divided into transgressive system tract (TST) and highstand system tract (HST).The shallow-sea platform is the main sedimentary environment of the Ordovician in northern Tarim Basin and it experienced the evolutionary process of restricted plat-form,open platform and platform edge from the Early Ordovician to the Late Ordovician successively.E-ventually,as detrital material of terrigenous origin filled in, the platform sedimentary environment in northern Tarim Basin was destroyed and developed into mixed platform.关键词
层序地层/沉积演化/碳酸盐岩台地/奥陶系/塔里木盆地Key words
sequence stratigraphy/sedimentary evolution/carbonate rock platform/Ordovician/Tarim Basin分类
能源科技引用本文复制引用
宋倩,马青,董旭江,刘莹,高翔,曹康..塔里木盆地北部地区奥陶系层序地层格架与沉积演化[J].古地理学报,2016,18(5):731-742,12.基金项目
国家科技重大专项“塔里木盆地海相碳酸盐岩油气资源潜力、有利勘探区带评价与目标优选研究”项目（编号2011 ZX5004－004）资助。［Financially supported by the project “Study on hydrocarbon potential，favorable exploration region，target optimization of marine carbonate rock in Tarim Basin”of National Science and Technology Major Project （No.2011 ZX5004－004）］。 （）
