四川盐边地区志留纪牙形石生物地层及年代地层  

SILURIAN CONODONT SUCCESSION AND CHRONOSTRATIGRAPHY OF THE BAIZITIAN REGION IN YANBIAN, PANZHIHUA, SICHUAN

作　　者：金淳泰[1] 钱泳蓁[1] 王吉礼[1] 

机构地区：[1]成都地质矿产研究所,四川成都610082

出　　处：《地层学杂志》2005年第3期281-294,i007-i008,共16页Journal of Stratigraphy

基　　金：全国地层委员会"中国主要断代地层建阶研究"项目。

摘　　要：首次提供了四川盐边地区从下志留统至下泥盆统连续的志留系年代地层系统的实际证据和原始材料,由上而下建立8个牙形石带,2个牙形石组合带和1个笔石带,以此为依据建立了攀枝花阶、永兴阶、箐河阶、叉河阶、透底河阶和支六阶,分别归入下泥盆统、顶志留统、上志留统、中志留统和下志留统,为我国志留系安康阶以上地层的建阶研究工作提供了实际的基础资料。四川盐边地区志留系龙马溪组为笔石相地层,其上全为碳酸盐岩相,其中牙形石发育良好,形成连续完整的牙形石带序列,这对我国和更大的范围壳相志留系年代地层系统对比提供了非常有价值的资料。The actual evidence and primary information are presented for the first time in China for the continuous Silurian strata from the Lower Silurian, through the Middle Silurian and Upper Silurian, to the Top Silurian, and finally to the Lower Devonian. Nine conodont zones, two conodont assemblage zones and one graptolite zone have been distinguished in a descending order, resulting in the establishment of six stages, i.e. the Panzhihuan, Yongxingian, Qinghean, Chahean, Toudihean and Zhiliuan Stages, and four Series, i.e. the Top Silurian, Upper Silurian, Middle Silurian and Lower Silurian. These results of research have provided the basic information for the establishment of the stratigraphic stages above the Silu-rian Ankang Stage in China. Apart from the graptolite facies in the Longmaxi Formation, the Silurian strata are dominated, without exception, by the carbonate rock facies in which the conodonts are well developed. The complete and continuous conodont succession have provided favourable conditions and foundation for establishment of the Silurian chronostratigraphic system of the shelly-facies in China or even within wider region.

关 键 词：志留系 牙形石带 笔石带 盐边县 攀枝花市 四川 

分 类 号：P534.4[天文地球—古生物学与地层学]