摘要
作者近年来在冀中地区首次发现了钙质超微化石,首次在不同层位发现了海绿石,结合其它古生物、岩石矿物和地球化学标志,表明区内早第三纪时曾多次发生过海泛。本文对海泛特征作了详尽的描述,并依据层序地层学理论分析了海泛层位在时间和空间上的变化,指出受海泛影响最大的层位即密集段。近海内陆盆地受海水进侵或海洋气候的影响,故湖盆基准面与海平面的升降变化趋势近似,从而为在陆相断陷盆地中开展层序地层学研究奠定了基础。文中对海水进侵方向(通道)也作了探索性研究。
In the Tertiary formations of North China, nannofossis and glauconites in a variety of sed-
imentary strata are found firstly by the authors. There are some marine fossils. such as
Foraminifera, Brozoa. Alga. Spongia. Echinoderrnata, oceanic Ostracoda and so forth. More
and more evidences have been identified and show that central Hebei was inundated temporari-
ly through the open sea channel in Tertiary.
The features of fnarine inundation is described in detail in this paper. Based on the basic
concepts of sequence stratigraphy, the authors have analysed the variance of invaded sediments
both in time and in space, and pointed out that the strata, which are strongly influenced by ma-
rine inundation are of the characteristic condensed sections. The inner continental basin is also
influenced by the marine inundation events or oceanic climate, so the variance of the curves of
both sea level and the base level is smal1 and the basic concepts of sequence stratigraphy can be
used in the faulted basin in Eastern China. in this paper the open sea inundating channel is also
studied.
出处
《现代地质》
CAS
CSCD
1993年第3期274-284,共11页
Geoscience
基金
高等学校博士学科点专项科研基金资助项目的部分成果
关键词
海泛
超微化石
海绿石
层序地层学
marine inundation, nannofossil, glauconite, condensed section, open sea inun-dating channel
