| 贵州遵义寒武系底部硅质岩中细菌状化石的发现 |
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| 引用本文： | 谢小敏,腾格尔,秦建中,边立曾,张庆珍,张文涛.贵州遵义寒武系底部硅质岩中细菌状化石的发现[J].地质学报,2013,87(1):20-28. |
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| 作者姓名： | 谢小敏 腾格尔 秦建中 边立曾 张庆珍 张文涛 |
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| 作者单位： | 1. 中石化石油勘探开发研究院无锡石油地质研究所,江苏无锡,214151;现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京,210093
2. 中石化石油勘探开发研究院无锡石油地质研究所,江苏无锡,214151 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 通过扫描电镜精细观测,在贵州遵义松林地区早寒武世黑色岩系剖面,于其底部的硅质页岩中发现了可能的细菌状化石,直径200～500 nm,形态不一,具有细菌的大小和形状,有机碳含量丰富,大部分细菌含磷.通过与已有报道中具相似形态生物体的对比,认为其可能是原生的、具有细菌生物结构的微生物小球体(Microbioids),本文称之为细菌状化石.这类细菌状化石可以赋存于石英颗粒表面、石英颗粒间,甚至嵌入石英颗粒中.据前人的模拟实验推测,细菌在石英颗粒沉淀过程中可能起到过重要促进作用,这从微观上为硅质岩的形成提供了新信息.
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| 关 键 词： | 细菌状化石 微生物小球体(Microbioids) 寒武系 硅质岩 贵州遵义松林剖面 |
| 收稿时间： | 2012/5/25 0:00:00 |
| 修稿时间： | 2012/9/26 0:00:00 |
Bactera-like Fossil in the Early Cambrian Siliceous Shale from the Zunyi City, Guizhou Province, Southwest China |
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| XIE Xiaomin,Tenger,QIN Jianzhong,BIAN Lizeng,ZHANG Qingzhen and ZHANG Wentao.Bactera-like Fossil in the Early Cambrian Siliceous Shale from the Zunyi City, Guizhou Province, Southwest China[J].Acta Geologica Sinica,2013,87(1):20-28. |
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| Authors: | XIE Xiaomin Tenger QIN Jianzhong BIAN Lizeng ZHANG Qingzhen and ZHANG Wentao |
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| Institution: | Wuxi Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Institute, Wuxi, Jiangsu, 214151; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing, 210093;Wuxi Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Institute, Wuxi, Jiangsu, 214151; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing, 210093;Wuxi Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Institute, Wuxi, Jiangsu, 214151;Wuxi Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Institute, Wuxi, Jiangsu, 214151;Wuxi Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Institute, Wuxi, Jiangsu, 214151;Wuxi Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Institute, Wuxi, Jiangsu, 214151 |
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| Abstract: | Based on a detailed microobservation by scanning electron microscope (SEM), we proposed a possible new discovery of bacterial fossil in the siliceous shale of the Songlin early Cambrian black rock series, Guizhou Province, South China. The fossils are characterized by a width of 200-250 nm with uneven surfaces and high abundance of total organic carbon (TOC). By a comparison with the organism with similar morphology that has been reported previously, it is concluded that the fossils discovered here have representative size and structure of bacteria. Thus, we suggested that the fossils may be protogenetic microbioids with typical bacterial structure. These fossils are present in multiple locations, such as the surface of quartz grains, inter-grains and even within the grains. Hence, it can be implied that the bacteria may play important roles in the precipitation of quartz. These results provide new microscopic information on the understanding of the formation of siliceous rocks. |
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| Keywords: | Bacteria-like fossils Microbioids lower Cambrian Siliceous Rocks |
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