试论(竹蜓)的古生态与古水动力的关系——以贵州早二叠世栖霞晚期为例

A DISCUSSION OF THE RELATIONSHIP BETWEEN FUSULINID ECOLOGY AND HYDRODYNAMIC ENVIRONMENT——by way of example of Later Chihsia Stage,Early Permian,Guizhou Province

王立亭 董文兰 叶念曾 陈文益

Wang Liting Dong Wenlan Ye Nianzeng Chen wenyi

关于中国的(竹蜓)类,近百年来,李四光、陈旭、盛金章等中外学者作了大量研究工作,(竹蜓)在石炭、二叠纪地层中的垂直分带及地层学意义也已为广大地质工作者所熟知,但对(竹蜓)的生态学方面研究则较少。(竹蜓是已绝灭的单细胞微体动物,属原生动物门,肉足虫纲,有孔虫亚纲,系海生底栖有孔虫类。

Through drawing the lithofacies-palaeographic map of Later Chihsia Stage,Early Permian,Guizhou province,it has been found that not only the fusulinids possessed the horizontal zonation conformed to the distribution of palaeographic environment but also their outerform and internal structure adapted to different energetic environment.In this study,a great number of regional geological surveying information has been used,including 109 sections,529 samples and the statistical data of 17 fusulinid genera.In general,the spherical,subspherical fusulinids with simple internal structure were widely distributed in and adapted the quite tranquil environment.Thus,they mostly accumulated in the low energetic subrestricted platform.Contrarily,the inflated fusiform and fusiform fusulinids were widely distributed in open platform facies of west and central Guizhou.A number of elongate fusiform fusulinids with complicated structure predominantly lived in the high energetic zone of biobank of Ceheng-Ziyun District.According to the point of view of hydrodynamics,the writers have studied the relationship between the fusulinid ecology and palaeoenvironment,and have emphasized the important significance of drawing the lithofacies-palaeographic map through the statistics of actual information and theoretical analysis.

10.11743/ogg19820305