新疆柯坪—巴楚地区志留纪含鱼化石地层序列与加里东运动  

THE SUBDIVISION AND CORRELATION OF THE SILURIAN FISH-BEARING STRATA AND CALEDONIAN MOVEMENT IN KALPIN AND BACHU REGIONS,THE TARIM BASIN,XINJIANG

作　　者：赵文金[1] 王士涛[2] 王俊卿[1] 朱敏[1] 

机构地区：[1]中国科学院古脊椎动物与古人类研究所脊椎动物进化系统学重点实验室,北京100044 [2]中国地质科学院地质研究所,北京100037

出　　处：《地层学杂志》2009年第3期225-240,共16页Journal of Stratigraphy

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-yw-156);国家重点基础研究发展规划项目(No.2006CB806400);科技基础性工作专项(No.2006Fy120300-6);国家自然科学基金项目(No.40572021;40872020);中石化集团前瞻性和基础性研究项目(No.W2704)联合资助

摘　　要：塔里木盆地西北缘柯坪—巴楚一带发育一套古生代红色岩系,包括塔塔埃尔塔格组、依木干他乌组和克兹尔塔格组,其中的生物群以鱼类、腕足类、双壳类和腹足类等为主。重新厘定这套红色岩系各组的定义,并依据鱼类化石资料,将其与华南板块扬子区的有关地层进行了对比,认为其皆为志留纪。现有资料表明,志留纪期间塔里木板块与华南板块同属一个鱼类古动物地理区系,即东原特提斯大区的泛华夏盔甲鱼类区系。依据地层格架和鱼群面貌等,两大板块在志留纪温洛克世之前曾连在一起或靠得很近,可能组成塔里木—华南联合板块;晚期加里东运动在两大板块上产生了同样显著的影响,皆表现为兰多维列世特列奇期之末发生的大规模整体上升。The Silurian red sandstones and mudstones, also termed the ＂Old Red Rock Series＂, are widely distributed in the northwestern margin of the Tarim Basin, Xinjiang Uygur Autonomous Region, China.The strata of about 2 500m in thickness have been subdivided into four formations in ascending order, the Kalpintag, Tataertag, Ymogantau and Kezirtag formations. The geological survey in this area was initia- ted in 1930s, however it is not until late 1980s that first Paleozoie fish （Sinacanthus） was reported （Wang et al. 1988）. Since then, more Paleozoic fish fossils, which are mainly endemic （Pan ＆ Dineley, 1988; Zhao, 2005; Zhao ＆ Zhu, 2007）, have been collected from this area, thus providing new data for the study of biostratigraphy and vertebrate biogeography. Until now, no fish fossil has been found from the Kalpintag Formation. The Silurian fish-bearing strata in the Kalpin and Bachu areas only include the Tataertag, Ymogantau and Kezirtag formations. The Tataertag Formation is composed of grey, greyish-white siltstone, sandstone and mudstone intercalated with light-purple, purplish-red siltstone and marlstone, and yields abundant agnathans including： Nanjiangaspis kalpinensis, Kalpinolepis tarimensis, Hanyangaspis guodingshanensis, H. sp. （Hanyangaspididae）, Microph ymaspis pani （Xiushuiaspididae）, Platycaraspis tianshanensis （Dayongaspididae）, Sinacanthus wuchangensis and Neoasiacanthus planispinatus （Chondrichthyes） etc. Nanjiangaspis is very similar to Hanyangaspis from Wuchang, Hubei Province and Latirostraspis from Chaoxian, Anhui Province. Platycaraspis is very similar to Dayongaspis from Dayong, Hunan Province, and Microphyma- sis is similar to Xiushuiaspis from Xiushui, Jiangxi Province and Changxingaspis from Changxing, Zhejiang Province. Hanyangaspis, Latirostraspis, Dayongaspis, Xiushuiaspis, Sinacanthus and Neoasiacanthus in the South China are only present in the Llandovery of Silurian. Hence, the Tataertag Formation could be assigned to the early Telychian of Lla

关 键 词：生物地层 古动物地理 加里东运动 志留系 柯坪 巴楚 新疆 

分 类 号：P534.43[天文地球—古生物学与地层学]