松辽盆地基底“多层结构”的探讨及其意义  

Discussion on "multi-laminate structure" of basement in Songliao Basin and its significance

作　　者：梁爽[1] 彭玉鲸[2] 姜正龙[1] 

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]吉林省区域地质矿产调查所,长春130012

出　　处：《世界地质》2009年第4期430-437,475,共9页World Geology

基　　金：中国石油科技创新基金(2008D-5006-01-09)

摘　　要：松辽盆地钻井基底岩系中残留的岩浆锆石和中生代火山岩中捕获的岩浆锆石的测年资料统计显示,盆地基地的形成时间具有240Ma±、350Ma±、420Ma±、530Ma±、1000～1100Ma±、1800～1850Ma±和2500Ma±七个峰值。结合钻井资料、古生物资料和岩性特征的研究,松辽盆地基底可划分出6个构造层:华力西构造层、加里东构造层、贝加尔(兴凯)构造层、四堡构造层、吕梁构造层、阜平构造层和迁西构造层,揭示其基底具有"多层结构"的特征,表明该区前中生代构造演化与兴蒙--吉黑造山带、西伯利亚及华北板块陆缘构造演化协调一致。拟建的古生界地下岩石地层单位与周边地区已有的岩石地层单位可进行对比,有利于扩大盆地外围和深部油气藏勘查。The dating data of magmatic zircons residued from the drilling basement rocks and captured from Mesozoic volcanic rocks in Songliao Basin indicate seven peaks of the forming time in the basin basement, which are about 240 Ma, 350 Ma, 420 Ma, 530 Ma, 1 000 - 1 100 Ma, 1 800 - 1 850 Ma and 2 500 Ma, respectively. Combined with the research on drilling data and paleontological and lithological characteristics, the basement of Songliao Basin can be divided into six structure layers as Variscan, Caledonian, Baikal （Khankan） , Sibao, Luliang, Fuping and Qianxi, which shows multi-laminate structure of basement. The fact indicates that the tectonic evolution in this area is consistent with the epicontinental structure of Xingmeng-Jihei orogenic belt, Siberia and North China blocks in Mesozoic. The planning-established Paleozoic lithostratigraplic units in the basement of Songliao Basin can be correlate to the known lithostratigraplic units of the surrounding areas, which benefits expanding the survey and explore scope of oil and gas reservoirs in the periphery and profundity of the basin.

关 键 词：松辽盆地 基底 多层结构 

分 类 号：P542[天文地球—构造地质学]