湖南益阳早奥陶世几丁石及疑源类的生物分带与对比  

BIOSTRATIGRAPHIC SUBDIVISION AND CORRELATION OF EARLY ORDOVICIAN CHITINOZOANS AND ACRITARCHS IN YIYANG, HUNAN

作　　者：王文卉[1] 冯洪真[1] 李丽霞[1] 陈文建[1] 

机构地区：[1]南京大学地球科学与工程学院江苏南京210093

出　　处：《地层学杂志》2013年第2期155-168,共14页Journal of Stratigraphy

基　　金：国家自然科学基金项目(No.40972009,No.41172012);中国科学院知识创新工程项目(No.KZCX2-YW-Q05-01)资助

摘　　要：报道了湖南益阳晚特马道克期至弗洛早期笔石页岩中的几丁石和疑源类化石,并识别出3个几丁石生物带以及3个疑源类组合带。几丁石、疑源类化石与笔石共生,使得识别出的几丁石带以及疑源类化石组合的时代可以根据笔石带校正。在江南斜坡区建立的连续的晚特马豆克期及弗洛期最早期的几丁石、疑源类序列,不但可与国内外同期地层进行精确对比,对于早奥陶世古生物地理的研究同样具有一定意义。Chitinozoans and acritarchs are reported from the Late Tremadocian to early Floian graptolitic shales in the Nanba Section of the Yiyang area in the Hunan Province. Three chitinozoan biozones and three acritarch assemblage zones are distinguished. The co-exsiting of graptilites,chitinozoans together with acri- tarchs allows precise calibration between the chitinozoan biozones and acritarch assemblages versus the ref- erence graptolite biozones. The succession of the Late Tremadocian-early Floian chitinozoans and acritarchs from the Jiangnan Slope not only allows precise correlation at both regional and global scale, but also has some palaeogeographical implication refers to this time interval.

关 键 词：生物地层 几丁石 疑源类 生物带 特马道克期 弗洛期 奥陶纪 湖南 

分 类 号：P534.42[天文地球—古生物学与地层学]