辽河盆地东部凹陷北部地区新老第三纪界面地层剥蚀量研究  

Study on the Erosion Amount of Hiatus Surface between Neogene and Eogene in North Part of East Depression, Liaohe Basin

作　　者：吴智平[1] 刘继国[1] 张卫海[1] 查明[1] 

机构地区：[1]石油大学资源系,山东东营257061

出　　处：《高校地质学报》2001年第1期99-105,共7页Geological Journal of China Universities

基　　金：石油大学 (华东)博士基金

摘　　要：辽河盆地新老第三纪地层间断面 (N/E)形成于盆地由裂陷发育阶段向坳陷发育阶段转化的过渡时期 ,界面之下的裂陷沉积地层在早第三纪末期遭受了强烈剥蚀。在运用声波时差资料计算了近 4 0口单井的地层剥蚀量的基础上 ,分析了地形对地层剥蚀的控制作用 ,恢复了辽河盆地东部凹陷北部地区N/E间断面地层剥蚀厚度等值线图。结果显示该区域内N/E间断面地层剥蚀量的横向变化具有北部大、南部小、古河道两侧大、河道所在位置小的特点。The hiatus surface between Neogene and Eogene in the east depression of Liaohe basin was formed in the transition period from the rifting stage to post rifting of the basin evolution. Beneath the surface, sediments formed in faulted depression were eroded due to tectonic uplift in the last stage of Eogene. Basing on calculated erosion amount of some wells in different tectonic positions and analyzing the relation between erosion and topography, the thickness of eroded sediments of N/E in the north region of this depression had been recovered. The result indicated that, with regard to the whole region, the erosion amount in the north was larger than that in the south. It also suggested that the erosion amount was smaller in the area where paleo river bed located than that in the river banks.

关 键 词：地层剥蚀量 N/E间断面 辽河盆地 地层界面 新第三纪 老第三纪 声波时差资料 

分 类 号：P534.6[天文地球—古生物学与地层学]