贵州罗甸县罗悃剖面石炭系巴什基尔阶-莫斯科阶界线研究  

BIOSTRATIGRAPHY OF THE BASHKIRIAN-MOSCOVIAN BOUNDARY INTERVAL AT LUOKUN SECTION IN GUIZHOU,SOUTH CHINA

作　　者：马兆亮[1] 王玥[1] 王秋来[1] Yasaku Hoshiki Katsumi Ueno 祁玉平[1] 王向东[1] 

机构地区：[1]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京210008 [2]日本福冈大学地球科学系

出　　处：《古生物学报》2013年第4期492-502,共11页Acta Palaeontologica Sinica

基　　金：国家自然基金项目;国家重点基础研究发展计划973项目(2011CB808905)资助

摘　　要：贵州罗甸县等地发育宾夕法尼亚亚系巴什基尔阶—莫斯科阶的斜坡相沉积地层,含丰富的■类和牙形刺化石。作为莫斯科阶底界重要生物地层标志的牙形刺Streptognathodus expansus,Idiognathoides postsulcatus以及■类化石Profusulinella (Aljutovella) aljutovica,Pro.prisca和Eofusulina在该剖面上均有发现。通过对罗悃剖面宾夕法尼亚亚系巴什基尔阶-莫斯科阶界线附近■类以及牙形刺分布情况的研究,本文采用Idiognathoides postsulcatus的首现(116.8m)作为罗悃剖面莫斯科阶底界的生物地层标志,■类Profusulinella prisca和Pro.aljutovica最早出现的层位与之相近,可以作为界线的辅助标志。In this paper, the advancement of the bio- stratigraphic study of the Bashkirian-Moscovian boundary beds at Luokun section in Guizhou, South China is introduced and discussed in detail. The exposed strata of the Bashkirian-Moscovian boundary interval at this section represent slope deposits containing relatively abundant fusulinids and conodonts. The important biostratigraphic marks of the base o{ Moscovian such as Streptog- nathodus expansus , Idiognathoides postsulcatus , Profusulinella （Aljutovella） aljutovica, Pro. prisca and Eofusulina were all found at this section. Based on the distribution of the fusulinids and conodonts around the base-Moscovian boun- dary and on the global correlation, we propose the first appearance of the advanced form of Streptog- nathodus expansus as the base of the Moscovian at Luokun section, which is close to the first appear- ance of ProfusulineHa prisca and Pro. aljutovi- ca. The latter two can be used as auxiliary marker. This research will be much useful on the definition of the base of the Global Moscovian Stage. A ma- jor effort will be devoted to the continued study of the eonodonts and fusulinlds within the Bashklrian- Moscovian transitional interval in the Luokun section.

关 键 词：■类 牙形刺 莫斯科阶 巴什基尔阶 全球界线层型 罗悃剖面 

分 类 号：Q915[天文地球—古生物学与地层学]