| 广西凭祥盆地深水底流沉积类型及其研究意义 |
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| 引用本文： | 宋博,闫全人,向忠金,李向东,高景民,王彦闻,李现冰.广西凭祥盆地深水底流沉积类型及其研究意义[J].沉积学报,2016,34(1):58-69. |
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| 作者姓名： | 宋博 闫全人 向忠金 李向东 高景民 王彦闻 李现冰 |
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| 作者单位： | 1.中国地质调查局西安地质调查中心 西安 710054; |
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| 基金项目： | 国家自然科学基金，中国地质调查局项目 |
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| 摘 要： | 内波、内潮汐沉积和复合流沉积是二十余年来在古代深水环境中新发现的一种具牵引流性质的沉积相类型,由于地层沉积记录十分有限,制约了深水底流沉积的沉积学研究。大比例尺实测地质剖面和精细露头测量表明,底流沉积发育于凭祥盆地深水沉积之中,通过对其沉积构造精细剖析和古水流测量,识别出内波、内潮汐沉积和复合流沉积,其中内波、内潮汐沉积以双向交错层理、单向交错层理、透镜状层理为特征,复合流沉积以复合流层理、丘状交错层理和较陡的爬升波纹层理为特征,进一步表明存在浊流和底流的交互作用,为古代地层中的深水底流沉积提供了又一研究实例。
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| 关 键 词： | 内波、内潮汐 复合流 深水底流 凭祥盆地 |
| 收稿时间： | 2014-04-08 |
Sedimentary Types and Significance of Deep-water Bottom Currents Deposit in the Pingxiang Basin,Guangxi |
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| SONG Bo,YAN QuanRen,XIANG ZhongJin,LI XiangDong,GAO JingMin,WANG YanWen,LI XianBing.Sedimentary Types and Significance of Deep-water Bottom Currents Deposit in the Pingxiang Basin,Guangxi[J].Acta Sedimentologica Sinica,2016,34(1):58-69. |
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| Authors: | SONG Bo YAN QuanRen XIANG ZhongJin LI XiangDong GAO JingMin WANG YanWen LI XianBing |
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| Institution: | 1.Xi'an Center of Geological Survey, China Geological Survey, Xi'an 710054, China;2.Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;3.University of Chinese Academy of Sciences, Beijing 100049, China;4.School of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;5.Shaanxi Nuclear Industry Geology Surveying Institute, Xi'an 710100, China |
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| Abstract: | The internal-wave, internal-tide and combined-flow deposit of the ancient deep-water system is a new find in recent twenty years. As the sedimentary records are rare, the sedimentology research on the bottom currents in the deep-water system is restricted. Based on detailed analysis of the geological sections and sedimentary outcrop columns, there exists bottom current deposits in the deep-water deposits of Pingxiang Basin. This paper deeply analyzes the sedimentary structure and paleocurrent of these bottom current deposits. The bottom current deposits consist of internal-wave, internal-tide and combined-flow deposits. The internal-wave and internal-tide deposits are characterized by bidirectional cross lamination, unidirectional cross lamination and lenticular lamination. The combined-flow deposit is characterized by combined-flow ripple lamination, hummocky cross lamination and sharp climbing ripple lamination. Furthermore, it shows the interaction between turbidity and bottom currents. This paper provides a new sample for the research of bottom currents in the ancient deep-water system. |
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| Keywords: | internal-wave and internal-tide combined-flow deep-water bottom current Pingxiang Basin |
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