| 西藏塔惹增地区中—上侏罗统仁多组的厘定及其地质意义 |
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| 引用本文： | 符宏斌,马德胜,吴 滔,熊兴国,曾禹人.西藏塔惹增地区中—上侏罗统仁多组的厘定及其地质意义[J].地质通报,2015,34(10):1821-1825. |
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| 作者姓名： | 符宏斌 马德胜 吴 滔 熊兴国 曾禹人 |
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| 作者单位： | 1.中国地质大学（武汉）生物地质与环境地质国家重点实验室，湖北 武汉 430074；2.贵州省地质调查院，贵州 贵阳 550018 |
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| 基金项目： | 中国地质调查局项目（编号：1212011086035、1212011121230） |
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| 摘 要： | 在西藏塔惹增地区前人划分的中二叠统下拉组中发现了具有典型意义的、代表中—晚侏罗世的Classopollis,Annulispora,Chasmatosporites等孢粉化石,以及较为丰富的Systematophora cf,Ctenidodinium等沟鞭藻类。表明在该区下拉组中至少有一部分以前没有被识别出的中—上侏罗统。通过岩石组合特征、基本层序、生物化石时代对比,将该套地层归属于仁多组。该地层的厘定,为区域地层对比、地层格架建立及探讨中生代盆地演化提供了基础资料。
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| 关 键 词： | 隆格尔-南木林地层分区 中—上侏罗统 仁多组 孢粉 沟鞭藻 |
The determination of Middle-Upper Jurassic Ringtor Formation in the Tarezeng area, Tibet, and its geological significance |
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| FU Hongbin,MA Desheng,WU Tao,XIONG Xingguo,ZENG Yuren.The determination of Middle-Upper Jurassic Ringtor Formation in the Tarezeng area, Tibet, and its geological significance[J].Geologcal Bulletin OF China,2015,34(10):1821-1825. |
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| Authors: | FU Hongbin MA Desheng WU Tao XIONG Xingguo ZENG Yuren |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Wuhan),
Wuhan 430074, Hubei, China;
2. Guizhou Geological Survey, Guiyang 550018, Guizhou , China |
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| Abstract: | Pollen fossils such as Classopollis, Annulispora, and Chasmatosporites as well as abundant dinoflagellates like Systematophora cf., and Ctenidodinium, which indicate Middle-Upper Jurassic strata with a typical significance, were found in the formerly-regarded Middle Permian Xiala Formation within the Tarezeng area, Tibet. The findings show that at least part of Middle-Upper Jurassic strata has not been identified previously in the Xiala Formation. The assemblage characteristics of the rock, basic sequence, and fossil comparison show that this set of strata belongs to the Ringtor Formation. The determination of this formation provides basic information for the correlation of regional strata, the establishment of the stratigraphic framework and the investigation of the evolution of the Mesozoic basin. |
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| Keywords: | Longgeer-Namling stratigraphic division Middle-Upper Jurassic Ringtor Formation pollen dinoflagellates |
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