摘要
根据露头、岩心、测井、地震、古生物及地化分析资料,建立三江、勃利、鸡西及虎林盆地晚中生代层序地层格架。通过构造事件、海侵事件、火山事件及各种事件引起的古生物变化和沉积旋回性进行盆地间对比及演化特征分析,共识别出2个巨层序、5个超层序、20个层序。从下至上,超层序A至超层序E分别对应挤压阶段、初始断陷阶段、整体沉降阶段、再次引张裂陷及萎缩破坏阶段。其中,城子河组至穆棱组超层序C全区发育,可进一步识别为层序Ⅵ—Ⅷ,其发育遵循从东向西、从南向北逐渐扩展的规律,沉积中心位于勃利盆地中部,因此其层序发育最全,个数最多。在此基础上,分析了构造和海平面变化是影响层序地层发育的主要因素。构造沉降控制巨层序、超层序发育及盆地内残余层序展布,海平面变化控制层序演化过程。
Based on the data analysis of outcrop, core, logging, seismic profile, palaeophyte and geochemistry, the sequence stratigraphie frameworks of Late Mesozoic in Sanjiang, Boll, Jixi and Hulin Basins are established in this paper. The comparison and the analysis of evolulion characteristics among the basins are conducted in terms of the palaeontologica change and the sedimentary cycle caused by tectonic movements, ingression events, volcanic events. Two megasequences, five supersequences and twenty sequences are identified. Supersequence A to supersequence E separately correspond to the extruding stage, initial faulted stage, entire subsidence stage, extension faulted stage again and shrinking damage stage from upper to lower. When Chengzihe and Muleng Formation deposited, the supersequenee C distributed widely over the area. It can be subdivided into sequence Ⅵ-Ⅻ, developed gradually from east to west and from south to north. Sedimentary centre is located in the middle part of Boll Basin, so the quantity of sequence in it is the most. Tectonic and sea level changes are the main controlling factor of sequence stratigraphic development. The tectonic： subsidence controls the megasequenee, supersequence development and the distribution of relict sequences within basin. Sea level change dominates the sequence evolution.
出处
《断块油气田》
CAS
北大核心
2011年第2期158-161,共4页
Fault-Block Oil & Gas Field
基金
国家专项"大庆探区外围中
新生代断陷盆地群演化与油气远景"(XQ-2004-07-03)资助
关键词
晚中生代
层序地层对比
层序格架
黑龙江东部盆地群
Late Mesozoic
sequence stratigraphy correlation
sequence frarmework
basin groups of East Heilongjiang
