鄂尔多斯盆地南缘奥陶系生物礁时代厘定  

Age Dating of the Ordovician Reefs in Southern Margin of Ordos Basin

作　　者：张晶晶 ZHANG Jing-jing(China Railway First Survey and Desigh Institute Co.Ltd,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院,西安710043

出　　处：《西安文理学院学报（自然科学版）》2021年第3期81-89,共9页Journal of Xi’an University(Natural Science Edition)

摘　　要：综述鄂尔多斯盆地南缘奥陶系露头剖面生物礁单元中的菌藻、钙藻、珊瑚及层孔虫生物多样性、生物地层学与火山事件及同位素测年资料,厘定不同剖面生物礁建造期分别为晚奥陶世凯迪阶早-中期.永寿好寺河、泾阳铁瓦殿、耀县桃曲坡与富平将军山泾河组或耀县组的生物礁为凯迪早期;陇县龙门洞、富平将军山、富平凤凰山剖面背锅山组的生物礁为凯迪中期.In this paper, the biodiversity, biostratigraphy, volcanic events and isotopic dating data of bacteria and algae, calcium algae, corals and stromatoporoids in the reef units of Ordovician outcrop section in the southern margin of Ordos Basin are reviewed.It is determined that the reef formation periods of different sections are the early middle Kaidi stage of Late Ordovician.The reefs of Haosihe formation in Yongshou county, Tiewadian formation in Jingyang county, Taoqupo formation in Yao county and Jinghe formation or Yaoxian formation in Jiangjunshan of Fuping county belong to the early Katie period.The reef of Beiguoshan formation in Longmendong section of Long county, Jiangjunshan and Fenghuangshan sections of Fuping county are assigned to the middle Katie period.

关 键 词：生物礁时代 奥陶纪 鄂尔多斯盆地南缘 

分 类 号：TE132[石油与天然气工程—油气勘探]