纪占胜, 王大宁, 姚建新, 武桂春. 拉萨北部堆龙德庆县设兴组古近纪孢粉化石的发现及其地质意义[J]. 地质通报, 2005, 24(4): 360-362.
    引用本文: 纪占胜, 王大宁, 姚建新, 武桂春. 拉萨北部堆龙德庆县设兴组古近纪孢粉化石的发现及其地质意义[J]. 地质通报, 2005, 24(4): 360-362.
    JI Zhansheng, WANG Daning, YAO Jianxin, WU Guichun. Discovery of Paleogene sporopollen in the Shexing Formation in Doilungd(e)g(e)n County, northern Lhasa, and its geological significance[J]. Geological Bulletin of China, 2005, 24(4): 360-362.
    Citation: JI Zhansheng, WANG Daning, YAO Jianxin, WU Guichun. Discovery of Paleogene sporopollen in the Shexing Formation in Doilungd(e)g(e)n County, northern Lhasa, and its geological significance[J]. Geological Bulletin of China, 2005, 24(4): 360-362.

    拉萨北部堆龙德庆县设兴组古近纪孢粉化石的发现及其地质意义

    Discovery of Paleogene sporopollen in the Shexing Formation in Doilungd(e)g(e)n County, northern Lhasa, and its geological significance

    • 摘要: 在拉萨北部堆龙德庆县马乡设兴村设兴组命名剖面顶部灰黑色泥岩夹层中的SX31样品中发现了Osmundacidites sp.,Deltoidospora sp.,Leiotriletes sp.,Purwtatisporites sp.,Ilexpollenites sp.,Quercoidites sp.,Caryapollenites sp.,Betulaceoipol—lenites sp.,Sporopollis?sp.,Ulmipollenites sp.,Compositoipollenites sp.,Tricolporollenites sp.等孢粉化石,主要为被子植物和蕨类植物花粉,未发现裸子植物花粉。这些孢粉指示的地层时代接近于始新世——渐新世。在剖面下部的4件样品中零星发现了Tricolpites sp.,Shizaeoisporites sp.,Compositoipollenites?sp.,Leiotriletes sp.,Cyathidites sp.,Neoraistrackia sp.,Converrucosisporrites sp.,Cycadopites sp.,PinuspoUenites sp.,Retitricolpites sp.等孢粉化石,指示的地层时代可能略早。从而说明设兴组与上覆林子宗群之间的角度不整合所代表的构造运动发生在始新世——渐新世或其后。

       

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