南盘江盆地北部二叠纪末放射虫动物群与古水深  

End-Permian Radiolarian Fauna from North Part of Nanpanjiang Basin and Implications of Paleo-Water Depths

作　　者：王瀚 肖异凡 张宁[1] 蒋杨 孙曦 何卫红[1,2] Wang Han;Xiao Yifan;Zhang Ning;Jiang Yang;Sun Xi;He Weihong(School of Earth Sciences,China University of Geosciences,Wuhan 430074,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质大学地球科学学院,湖北武汉430074 [2]中国地质大学生物地质与环境地质国家重点实验室,湖北武汉430074

出　　处：《地球科学》2018年第11期3901-3909,共9页Earth Science

基　　金：国家自然科学基金项目(Nos.41772016;41372030;KZ13W30086);中央高校基本科研业务费专项资金(No.CUGQYZX1706)

摘　　要：古-中生代之交,不同古地理背景中生物灭绝的表现不同.有关放射虫动物群研究,一方面,提供古地理背景等重要信息;另一方面,为生物多样性演变的研究提供基础资料.二叠纪-三叠纪之交盆地相放射虫的研究对揭示不同沉积相生物灭绝和古环境演变具有重要意义.贵州惠水以南克脚二叠系-三叠系界线剖面位于南盘江盆地北部,为盆地相沉积.对克脚剖面大隆组和大冶组底部放射虫动物群进行了初步统计、类群组合特征分析,结合放射虫的保存状态,对克脚剖面二叠纪末古水深进行了详细研究,认为大隆组至大冶组底部地层沉积于浪基面以下,古水深普遍浅于150m,大隆组上部最大海侵时古水深最浅达200m左右.The process of the Paleozoic-Mesozoic mass extinction in different paleogeographic settings is different. The research on radiolarian fauna provides not only important information for the study of paleogeographic settings but also basic information for the study of biodiversity evolution. The research on the radiolarians in the basinal facies of the Permian-Triassic transition is of great significance to reveal the mass extinction among different sedimentary facies and the paleoenvironmental evolution. The Permian-Triassic boundary section of Kejiao, Guizhou Province is located in the northern margin of the Nanpanjiang basin, which is in the basinal facies. In this paper, the preliminary statistics and taxonomy composition of the radiolarians from the Talung Formation and the basal part of Daye Formation in the Kejiao Section Were analyzed. And then the paleo-water depths of the late Changhsingian were studied in detail, based on the statistics and analysis of radiolarians and the preservation of the radiolarians. It is concluded that Talung Formation to basal Daye Formation were deoosited below the wave base, and the paleo-water depths are generally considered as shallower than 150 meters. The paleo-water depths during the maximum transgression in the latest Changshingian （equivalent to the uppermost of the Talung Formation） are about/or deeper than 200 meters.

关 键 词：放射虫 古水深 二叠纪末 贵州南部 生物地层学 

分 类 号：P52[天文地球—古生物学与地层学]