石油与天然气地质 ›› 1982, Vol. 3 ›› Issue (2): 177-183.doi: 10.11743/ogg19820209

• 论文 • 上一篇    下一篇

湘中早石炭世晚期有孔虫群及其地层意义

裘松余1, 林甲兴2   

  1. 1. 地质部石油地质综合大队;
    2. 地质部宜昌地质矿产研究所
  • 收稿日期:1981-02-10 出版日期:1982-06-25 发布日期:2012-01-16

THE FORAMINIFERAL FAUNAS OF THE LATER EARLY CARBONIFEROUS IN CENTRAL HUNAN AND THEIR STRATIGRAPHICAL SIGNIFICANCE

Qiu Songyu1, Lin Jiaxing2   

  1. 1. Comprehensive Research Institute of Petroleum Geology, Ministry of Geology;
    2. Yichang Institute of Geology and Mineral Resources, Ministry of Geology
  • Received:1981-02-10 Online:1982-06-25 Published:2012-01-16

摘要:

近年来,笔者于湘中涟源、邵阳一带早石炭世晚期(大塘期)的地层中获得丰富的有孔虫化石,并对其组合特征进行了系统的研究。

Abstract:

In recent years,the writers have obtained a lot of foraminiferal fossils from the late Early Carboniferous(Datang Stage)in the Liangyuan-Shaoyang region of central Hunan Province and carried out a detailed stuty on them.Based on their character,3 foraminiferal assemblage zones can be established in an ascenting order:1.Dainella gumbeica-Plectogyra posneri assemblage zone;2.Eodiscus-Lituotubella glomospiroides assemblage zone;3.Endothyranopsis crassus-Archaediscus krestovnikovi assemblage zone.Among them,the,Zimenqiao Group is the representative deposit of Endothyranopsis crassus-Archaediscus krestovnikovi assemblage zone;the other two zones represent respectively the deposits of upper or lower part of Shidengzi Group(see fig.1).The foraminiferal of the Datang Stage shows obviously the aspect of the later Early Garboniferous System and is similar to that of the Visean Stage in Moscow Basin of Soviet Union.It should be stressed that the Shidengzi Group is not only a comparatively favorable reservior rocks,but also a fine source rocks.In addition,the coalbearing beds of Ceshui Group and the gypsiferous beds of Zimenqioa Group are excellent covers.Therefore,in comparison with the other conditions as concerning the combination of source-reservior-cap rocks in present region,the Datang Stage should be a considerably favorable oil & gas bearing beds.