古生物在下古生界烃源岩有机质成熟度研究中的重要作用

对江苏下古生界动物化石有机碎屑（笔石、胞石和虫牙）反射率进行系统研究的结果表明，它们与镜质组反射率有着极为相似的光性特征和变化规律，即随埋深的增加而增高，因而它们均可和为有机质成熟度指标；并进而以牙形刺色变指标（ＣＡＩ）为纽带，分别建立它们与镜质组反射率之间的良好对应关系，提出它们的成熟度划分标准，为它们的实际应用奠定基础。

IMPORTANCE OF ZOOLITE DEBRIS IN THE STUDY OF ORGANIC MATURITY OF HYDROCARBON-SOURCE ROCKS FROM LOWER PALEOZOIC

The reflectances of zoolite organic debris(including graptolites,chitinozoans and scolecodonts) from Lower Paleozoic in Jiangsu are well studied in this paper.The results show that they have extremely similar optical properties and variational regularities with vitrinite reflectances,that is,their reflectances increase with increasing of depth,thus,they all can be served as good indexes of organic maturity.Furthermore,the correlations between them and vitrinite reflectances are established respectively by using conodont CAI as a link,therefore,the criteria of their maturity are given,which has laid the foundations for their actual application.