CAJ | 학술논문

乐山-龙女寺古隆起位于四川盆地中西部，紧邻龙门山构造带。古隆起的地质结构及构造演化对陆内变形和油气勘探具有重要的意义。利用最新的高分辨率地震和探井资料，结合盆地周边的露头资料，对乐山-龙女寺古隆起的地质结构进行了研究。其结果显示：乐山-龙女寺古隆起地质结构在整体上构造变形较弱，仅在龙门山前和龙泉山地区变形相对较强；剖面上存在多套滑脱层，具有上、下分层变形特征。通过地震剖面精细解释，并利用平衡剖面技术，分析了古隆起的构造演化。研究认为乐山-龙女寺古隆起受基底隆起控制、具有一定继承性，经历了多期同沉积隆起兼剥蚀过程，形成于前二叠纪，随后经过印支运动、燕山运动及喜马拉雅运动的调整改造最终定型；其构造演化经历了雏形阶段、发展阶段、强烈隆升剥蚀阶段、稳定埋藏阶段、川西前陆盆地发育阶段以及调整定型阶段，主要受基底和分层滑脱系统2方面因素的影响。
악산-룡녀사고륭기위우사천분지중서부，긴린룡문산구조대。고륭기적지질결구급구조연화대륙내변형화유기감탐구유중요적의의。이용최신적고분변솔지진화탐정자료，결합분지주변적로두자료，대악산-룡녀사고륭기적지질결구진행료연구。기결과현시：악산-룡녀사고륭기지질결구재정체상구조변형교약，부재룡문산전화룡천산지구변형상대교강；부면상존재다투활탈층，구유상、하분층변형특정。통과지진부면정세해석，병이용평형부면기술，분석료고륭기적구조연화。연구인위악산-룡녀사고륭기수기저륭기공제、구유일정계승성，경력료다기동침적륭기겸박식과정，형성우전이첩기，수후경과인지운동、연산운동급희마랍아운동적조정개조최종정형；기구조연화경력료추형계단、발전계단、강렬륭승박식계단、은정매장계단、천서전륙분지발육계단이급조정정형계단，주요수기저화분층활탈계통2방면인소적영향。
The Leshan-Longnvsi paleo-uplift is located at the mid-west of Sichuan Basin,adjacent to the Longmen mountain tectonicbelt.The geological structure and tectonic evolution of Leshan-Longnvsi paleo-uplift plays a significant role in intraplate deformationand exploration of oil-gas resources in this region.In this study,the geological structure of the paleo-uplift is analyzed using the lat-est high-resolution seismic data and well data of Sichuan Basin combined with the data of outcrops around the basin.Results showthat the intensity of tectonic deformation in the present geological structure of Leshan-Longnvsi paleo-uplift is overall weak,except atthe front of Longmen mountains and in the Longquan mountains;there are multiple sets of detachment layer with different structuraldeformation in the vertical profile.Additionally,the tectonic evolution of the paleo-uplift is discussed based on fine interpretation ofseismic profiles combined with the balanced section technique.Evidence shows that Leshan-Longnvsi paleo-uplift,as controlledby basement uplift and with a certain inheritance,has experienced multiple stages of synsedimentary uplifting and erosion;it wasformed in the pre-Permian period and then deformed by the Indosinian,Yanshan,and Himalayan movements.The tectonic evo-lution of the paleo-uplift can be divided into the six stages of embryonic formation,development,intense uplifting and erosion,stable burial,western Sichuan foreland development,and finalization,which is mainly influenced by the basement and the lay-ered detachment system.