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钙质超微化石(nannofosils)在上个世纪就被人们发现,至今已有百余年的研究史.本世纪七十、八十年代以来,在我国对其研究也日益兴起.钙质超微化石通常仅有1—30微米,大者可达50—60微米,颗石藻(coccolithophori-da)是其中主要类型.它广泛分布于侏罗、白垩纪以来的海相地层中,由于个体微小,数量众多,分布极广.演化迅速,又能反映海水温度、气候等环境变化,具有全球对比意义,因此随着石油勘探、深海钻探和海洋沉积的深入研究,已被列为一项重要的化石门类,成为地层划分的一个重要标志和古海洋研究的一项重要依据.钙质超微化石的研究大致可分为三个发展阶段.
In the last century, people found that calcareous nannofosils have been studied for more than one hundred years, and their research in our country has also been on the rise ever since the seventies and eighties of this century. Fossils are usually only 1-30 microns, the largest of which can reach 50-60 microns, coccolithophori-da is the main type which is widely distributed in the marine strata since the Jura and Cretaceous, , With a large number and a wide distribution, has evolved rapidly and can reflect changes in the environment such as seawater temperature and climate, and has a global comparative significance. Therefore, it has been listed as an important one with the further exploration of petroleum exploration, deep-sea drilling and marine sedimentation Fossil categories have become an important symbol of stratigraphic division and an important basis for paleoceanographic research.The research on calcareous microfossils can be divided into three stages of development.