摘要
下扬子区中二叠统孤峰组硅质岩中的放射虫化石极其丰富,这些化石主要由阿尔拜虫类(albailelids)、球形多囊虫类(Sphericalpolycystine)、十字多囊虫类(stauraxonpolycystine)组成,其中以Pseudoalbailelascalprata,P.longtanensis,P.cf.longicornis,Hegleriamammila,Folicuculusmonacanthus,Ruzhencevispongusuralicus占优势。对前人在下扬子区孤峰组建立的3个带进行了讨论,并与国外相应时代的化石带进行了比较。对下扬子区放射虫的环境意义及形成机制作了分析。
Abundant radiolarians have been recently found in the chert of Gufeng Formation of Middle Permian in Lower yangtze region. These radiolarian are composed of the albaillellids, the spherical polycystine and the stauraxon polycystine, among which dominant elements are P seduoa lbaillella scalprta,P. Longtanensis, P .cf. Longicornis, Hegleria mammilla, Follicucullus monacanthus and Ruzhencevispongus uralicus. The paper discuses three zones and their characters,established by the former geologists in Gufeng Formation of Lower Yangtze region. Through the correlation with some international respective zones,the paper points out the radiolarians lived in the circumstance of slope or deep sea and explains their formation mechanism of the circumstance.
出处
《江苏地质》
1999年第1期17-23,T002,共8页
Jiangsu Geology
基金
国家自然科学基金
关键词
下扬子区
孤峰组
放射虫
化石带
二叠纪
Lower Yangtze region
Gufeng Formation
Radiolarian fossil zone
Permian
Environmental significance