摘要
辽西金岭寺－羊山盆地土城子组为一套红色陆相碎屑岩组合。据其岩层垂向叠置规律及不整合面的特征，可划分出两个三级旋回层序，五个四级旋回层序，十六个五级旋回层序及若干个六级旋回层序及旋回层序所对应的冲积扇、滨湖、浅湖、最大湖泛期、风成沙漠及辫状河沉积体系。这些沉积体系的有规律叠置，构成了土城子组两个湖扩张－湖萎缩沉积序列，其顶、底为明显的不整合。通过对旋回层序和层序界面的横向追索，建立了辽西金羊盆地土城子组层序地层格架，从而揭示了中生代侏罗纪土城子组沉积期的盆地演化规律。
TuchengziF.inJinlingsi-YangshanBasininWestLiaoningprovinceisasetofredcontinentalclasticrocksassemblage.Accordingtotheoverlappingregularofstratainverticalandthecharacteristicsofunconformity,itcanbesubdividedinto2GradeⅢcyclicsequences,5GradeⅣcyclicsequences,16GradeⅤcyclicsequences,anumberofGradeⅥcyclicsequences,and3depositsystems:extensionallakesystem,shrinkinglakesystemandlargest-flood-lakesystem.Thesedepositsystemsregularlyoverlapped,formedtwoextensional-shrinkinglakedepositsequenceswithobviousdisconformableboundaries.Thesequence-stratumframeworkofTuchengziF.inJinlingsi-YangshanbasininWestLiaoningprovincecanbringtolighttheevolutionaryregularityofthebasinduringsedimentaryperiodofTuchengziF.ofJurassic,Mesozoic.
关键词
金羊盆地
土城子组
旋回层序
层序地层格架
WestLiaoningprovince
Jinlingsi-Yangshanbasin
TuchengziF.
cyclicsequence
sequence-stratumframework
