淮南地区新元古代九里桥组的疑源类化石组合及其生物地层学意义  

ACRITARCHS FROM THE NEOPROTEROZOIC JIULIQIAO FORMATION, HUAINAN REGION, AND THEIR BIOSTRATIGRAPHIC SIGNIFICANCE

作　　者：洪天求[1] 贾志海[1] 尹磊明[2] 郑文武[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2004年第3期377-387,共11页Acta Palaeontologica Sinica

基　　金：教育部博士学科点专项基金 (No .2 0 0 2 0 3 5 90 13 )资助课题

摘　　要：淮南地区新元古代九里桥组主要由砂质和泥质灰岩、叠层石灰岩以及白云质灰岩组成 ,含有著名的“淮南生物群”的重要分子。研究采用浸解法在该组碳酸盐岩中发现了大量的疑源类化石 ,它们以球形亚类为主 ,在组合面貌上继承了其下伏刘老碑组的疑源类组合特征。但化石个体较大 ,多细胞植物碎片含量明显增加 ,化石在不同层位的分布不均匀是九里桥组疑源类组合的显著特征。另外在该组中还发现了一些新的疑源类化石如 :Bai likaniadiligena ,?LomentunellavaginataHermann。文中还对九里桥组的凝源类组合与宏体化石、叠层石礁体的发育之间的关系等进行了探讨。The Neoproterozoic Jiuliqiao Formation in Huainan region consists of sandy and silty limestone, stromatolite limestone and dolomitic limestone. Most fossils of the famous “Huainan Biota” have been found in this formation. The acritarch assemblage obtained from the carbonatite is composed of Acanthomorphitae, Herkomorphitae, Pteromorphitae, Nematomorphitae, Sphaeromorphitae and many multicellular algal fragments. Most acritarchs are Sphaeromorphitae, which are similar to those from the lower Liulaobei Formation in this region. But the acritarchs from the Jiuliqiao Formation have their own prominent features, such as the large size and the much more fragments of multicellular algae, and the distribution of the microfossils in different layers is uneven and some species, such as Bailikania diligena and ?Lomentunella vaginata Hermann, were found in Jiuliqiao Formation for the first time in this region. The relationship between the microfossils and the macrofossils along with the stromatolite reefs is also discussed in this paper.

关 键 词：淮南地区 新元古代 九里桥组 碳酸盐岩 疑源类 化石 生物地层学 

分 类 号：Q915[天文地球—古生物学与地层学]