南海西沙群岛西科1井中新世石珊瑚  

MIOCENE SCLERACTINIA FROM WELL XK-1,XISHA ISLANDS, SOUTH CHINA SEA

作　　者：刘新宇 祝幼华[3] 史德锋 廖卫华[3] 罗威 许波[3] 李启剑 朱莉叶 LIU Xin-yu;ZHU You-hua;SHI De-feng;LIAO Wei-hua;LUO Wei;XU Bo;LI Qi-jian;ZHU Li-ye(Hainan Energy Co. Ltd. of CNOOC,Haikou 570100,China;Zhanjiang Branch of CNOOC Ltd. , Zhanjiang 524057, China;CAS Key Laboratory of Economic Stratigraphy and PaLaeogeography Nanjing Institute of Geology and Palaeontology , Center for Excellence in Life and Paleoenvironment , Chinese Academy of Sciences , Nanjing 210008, China;University of Chinese Academy of Sciences, Beijing 100049 , China)

机构地区：[1]中海油海南能源有限公司,海口570100 [2]中海石油(中国)有限公司湛江分公司,湛江524057 [3]中国科学院资源地层学与古地理学重点实验室,中国科学院南京地质古生物研究所和生物演化与环境卓越中心,南京210008 [4]中国科学院大学,北京100049

出　　处：《古生物学报》2019年第2期249-255,共7页Acta Palaeontologica Sinica

基　　金：国家科技重大专项(No.2017ZX05026-005-004)资助

摘　　要：南海西沙群岛西科1井374. 95 1 257.5 m井段发现石珊瑚化石19属,分别为Acropora,Antillo-phyllia , Astreopora, Caryophyllia, Coenangia, Cricocyathus, Cyphastrea, Diploastrea, Enallopsammia Favia ,Favites, Fungia,Goniastrea ,Leptastrea ,Meandrina ,Montipora, Phyllangia, Porites 和 Turbinaria 等,主要分布于黄流组二段和一段顶部、梅山组二段上部和一段以及三亚组二段。其中Antillophyllia分布于渐新世到中新世,Cricocyathus的分布时代为始新世至中新世,说明含上述2属珊瑚的地层时代不晚于中新世。综合有孔虫、大型底栖钙藻和钙质超微化石等的时代划分结果,推断374. 95-1 257. 5 m井段的时代属于中新世。对Cricocyathussp.,Antillophyllia sp.和Phyllangia sp.等单体珊瑚和群体珊瑚Goniastrea sp.的主要特征进行了描述。About 19 genera of scleractinian corals were found in the interval 374. 95 m to 1257. 52 m of the Well XK-1 from Xisha Islands, South China Sea. They are Acropora, Antillophyllia,Astreopora, Caryophyllia, Coenangia, Cricocyathus, Cyphastrea, Diploastrea, Enallopsammia, Favia,Favites,Fungia,Goniastrea,Leptastrea, Meandrina, Montipora, Phyllangia, Porites, Turbinaria. The scleractinian corals mainly occurred in the member 2 and at the top of member 1 of Huangliu Formation, ranging from the upper part of member 2 to member I of the Meishan Formation and in the member 2 of the Sanya Formation as well. Among them, the genus Antillophyllia has hitherto been known from Oligocene to Miocene, while the genus Cricocyathus has been recorded from Eocene to Miocene. It means that the age of the strata is not younger than Miocene. Concluding from the stratigraphic division of foraminifera,calcareous algae and calcareous nannofossils,the interval of 374. 95一1257. 52 m of the Well XK-1 is assigned to the Miocene in age. Furthermore,the main characteristics of solitary corals such as Cricocyathus,Antillophyllia,Phyllangia and the compound coral Goniastrea are described in this paper.

关 键 词：石珊瑚 中新世 西科1井 西沙群岛 南海 

分 类 号：Q911[天文地球—古生物学与地层学]