摘要
采用浸渍方法在中国北部燕山地区青白口系中发现大量疑源类,共计47属148种。疑源类的大量繁衍代表当时古地理环境为海域广阔、盐度正常的浅水海相沉积。青白口系(800—900Ma)疑源类主要特征:以单球藻类的大量繁衍并伴有多球藻类的分子;在线形藻类中有带状和管状的藻类,以宽度大、数量多为主要特征。其次由多个球形细胞组成的藻丝体;有少量船形藻类的分子出现;800—900Ma之间微生物群主要由下列类型组成:Mi-crococentrica,Satka,Symplasosphaeridium,Synsphaeridium,Chuaria,Statimophada,Tasmanites,Siphono-phycus,Taeniatum等属的分子。以上疑源类的稳定性和可比性,可作为具有广泛生物地层对比依据。
A great number of acritarchs, including 47 genera and 148 species, are obtained by using standard palynological preparation technique from the Qinghaikou System （800-900 Ma ） in the Yanshan region, North China. The diversity and abundance of the acritarch assemblage indicate the environment of shallow sea with normal salinity. The acritarch assemblage of the Qingbaikou System is characterized by numerous sphaeromorphs, a few netromorphs, colonial forms, some band like and pipe-like filamentous algae, as well as algal trichome composed by many spherical cells. Acritarchs identified include mainly morphological taxa of Micrococentrica, Satka, Symplasosphaeridium, Synsphaeridium, Chuaria, Stratimophada, Tasmanites, Siphonophycus, and Taeniatum. The acritarch assemblage available can be used for biostratigraphic correlation of the Qingbaikou System in the vast Yanshan region, North China.
出处
《微体古生物学报》
CSCD
北大核心
2005年第3期225-242,共18页
Acta Micropalaeontologica Sinica
基金
国家自然科学基金项目(40372003)
中国地质调查局项目(1212010511603)的共同资助。
