云南保山—施甸地区早石炭世牙形刺序列及其地层意义  

EARLY CARBONIFEROUS CONODONT SEQUENCE IN THE BAOSHAN——SHIDIAN AREA,YUNNAN AND ITS STRATIGRAPHIC SIGNIFICANCE

作　　者：李仁杰 段丽兰[2] 

机构地区：[1]四川省攀枝花市科委,攀枝花617000 [2]成都地质学院,成都610059

出　　处：《微体古生物学报》1993年第1期37-52,121-122,共16页Acta Micropalaeontologica Sinica

摘　　要：该文论述了保山—施甸地区下石炭统下部的三个牙形刺带:Pseudosemiglaber带、latus带及tex-anus带。石炭系与泥盆系呈平行不整合接触,界线位于牙形刺triangularis带与crenulata带间或ex-pansa带与sandbergi带间,各地不一;杜内阶至维宪阶地层连续,两阶界线位于牙形刺 latus带与texanus带间,也大致相当于珊瑚 Zaphrentites parallelus-Neozaphrentis subtenella-Rotiphyllum den-sum-Pentaphyllum yudongense 组合与Kueichouphyllum sinense-Siphonophyllum caninoides-HeteroPhyllia yunnanensis组合之界。The Lower Carboniferous in the Baoshan--Shidian area in Yunnan Proivince consists of twokinds of sedimentary facies——platform facies and basin facies. In the platform facies,three conodont zones can be recognized in descending order in the low-er part of the lower Carboniferous, namely, the texanus Zone, the latus Zone and the pseu-dosemiglaber Zone,which can be correlated internationally. The lowermost Carboniferous intervalunzoned. The Lower Carboniferous is in disconformable contact with the Upper Devonian. In the platform facies,the uppermost Devonian is equivalent to the triangularis Zone and thelowermost Carboniferous to the lower crenulata zone,while in the basin facies,the uppermost De-vonian is equivalent to the expansa Zone and the lowermost Carboniferous to the sandbergi Zone. In the platform facies, Tournaisian and Visean strata are continuous,with their boundaryequivalent to the boundary between the latus Zone and the texanus Zone,which is approximatelyequivalent to the boundary between the coral Zaphrentites parallelus--Neozaphrentis subtenella-Rotiphyllum densum--Pentaphyllum yudongense Assemblage and Kueichouphyllum sinense-Siphonophyllia caninoides--Heterophyllia yunnanensis Assemblage (Duan Li--lan, 1985). Here described and illustrated are 10 genera and 31 species and subspecies.

关 键 词：牙形刺 早石炭世 地层 云南 

分 类 号：Q915.817[天文地球—古生物学与地层学]