| 西藏羌南坳陷中侏罗统夏里组硅化木的发现及意义 |
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| 引用本文： | 刘建清,杨 平,陈文斌,陈文西,付修根.西藏羌南坳陷中侏罗统夏里组硅化木的发现及意义[J].地质通报,2007,26(12):1692-1696. |
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| 作者姓名： | 刘建清 杨 平 陈文斌 陈文西 付修根 |
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| 作者单位： | 中国地质调查局成都地质矿产研究所沉积与能源地质研究室,四川,成都,610082 |
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| 基金项目： | 国家油气专项(编号:XQ2004-06)资助 |
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| 摘 要： | 首次在羌南地区的地层中发现了硅化木化石,对硅化木的基本特征进行了描述,根据孢粉组合特征,将地层定为中侏罗统夏里组,硅化木初步定为南洋杉。同时,孢粉组合的特征反映出该区中侏罗世具干旱古气候特点。结合前人晚三叠世硅化木的发现,对羌塘盆地的性质及演化提出了新的思考。
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| 关 键 词： | 硅化木 夏里组 中侏罗统 羌南坳陷 西藏 |
| 文章编号： | 1671-2552(2007)12-1692-05 |
| 修稿时间： | 2007年7月18日 |
Discovery of silicified wood in the Middle Jurassic Gyari Formation in the southern Qiangtang depression, Tibet, China, and its significance. |
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| LIU Jian-qing,YANG Ping,CHEN Wen-bin,CHEN Wen-xi,FU Xiu-gen.Discovery of silicified wood in the Middle Jurassic Gyari Formation in the southern Qiangtang depression, Tibet, China, and its significance.[J].Geologcal Bulletin OF China,2007,26(12):1692-1696. |
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| Authors: | LIU Jian-qing YANG Ping CHEN Wen-bin CHEN Wen-xi FU Xiu-gen |
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| Abstract: | Recently silicified wood has been for the first time discovered in Middle Jurassic strata in southern Qiangtang,and its basic features are described.According to the features of the sporopollen assemblage,the strata is determined to be the Middle Jurassic Gyari Formation and the silicified wood is preliminarily designated as Araucarioxylon.The features of the sporopollen assemblage reflect that the Middle Jurassic climate was dry and hot in this area.According to this discovery,combined with the silicified wood discovered by previous researchers in Triassic strata,the authors present new ideas about the Middle Jurassic tectonic evolution and character of the Qiangtang basin. |
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| Keywords: | silicified wood Gyari Formation Middle Jurassic southern Qiangtang depression Tibet |
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