地质通报2016，Vol.35Issue(6)：866-871,6.
松辽盆地海侵事件--松科1井钙质超微化石新证据
Seawater incursion event in Songliao Basin:New evi-dence from calcareous nannofossils of SK-1
摘要
Abstract
The Songliao Basin is the largest non-marine oil-bearing basin in China. Due to the absence of sufficient evidence, the hypothesis of seawater incursion(s) into the Songliao Basin remains controversial. Marine fossil materials can provide direct explana⁃tions. More recently, a few calcareous nannofossils were discovered from units 1 and 2 of the Nenjiang Formation in drill hole SK-1. In these fossils, some taxa have been positively identified, namely Calculites obscurus, Calculites ovalis, Quadrum sp., and Micula sp. They were distributed in marine environment of the Cretaceous. Based on comparisons of the calcareous nannofossil assemblages from global records, the age of units 1 of the Nenjiang Formation seems to have spanned from the latest Turonian to Maastrichtian. The nannofossils from the Songliao Basin have the marine origin, characterized by common diversity and abundance. The distribu⁃tion and paleoecology of the calcareous nannofossils as well as the co-existing foraminifera in the SK-1 provide further evidence for seawater incursion events in the Songliao Basin. The authors hold that periodical seawater incursion(s) brought calcareous nannofossils and foraminifera into the Songliao Basin during sedimentation of units 1 and 2 of the Nenjiang Formation, when both lake and sea were at high level.关键词
钙质超微化石/海水侵入/松辽盆地/松科1井/嫩江组/白垩纪Key words
calcareous nannofossils/seawater incursion/Songliao Basin/SK-1/Nenjiang Formation/Cretaceous分类
生物科学引用本文复制引用
曹文心,席党鹏,黄清华,程祎,屈海英,高莲凤,万晓樵..松辽盆地海侵事件--松科1井钙质超微化石新证据[J].地质通报,2016,35(6):866-871,6.基金项目
国家重点基础研究发展计划项目（编号2012CB822002）、国家自然科学基金项目（批准号41302008、41172015、41172037）、中国地质调查局项目（编号1212011120145）和现代古生物学与地层学国家重点实验室开放基金项目 （）
