| 我国浊流与其他重力流沉积研究进展概况和发展方向问题刍议 |
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| 引用本文： | 孙枢,李继亮.我国浊流与其他重力流沉积研究进展概况和发展方向问题刍议[J].沉积学报,1984,2(4):1-7. |
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| 作者姓名： | 孙枢 李继亮 |
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| 作者单位： | 中国科学院地质研究所 |
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| 摘 要： | 引言自七十年代中期以来,我国沉积学工作者对浊流沉积和其他重力流沉积寄予很大重视,陆续在各个时代的地质剖面中发现了这类沉积物,并进行了程度不等的研究,代表了我国沉积学进展的一个重要方面。1983年10月14-21日,由中国矿物岩石地球化学学会沉积学会、中国石油学会石油地质学会和云南石油学会联合举办的“浊流沉积现场考察及学术讨论会”在广西南宁市召开。会议参加者考察了桂西山区田林县的路城，八渡和浪平地区泥盆系至三叠系地层剖面上的碳酸盐台地跌积边缘重力沉积、深海盆陆源碎屑浊积岩和火山碎屑浊积岩。会上宣读了27篇论文，进行了学术讨论。这次会议无疑将促进我国浊流与其他重力流沉积研究工作更加迅速地深入发展。本文将对我国已往的浊流与其他重力流沉积的研究成果予以简要综述，同时对此研究领域的发展方向做些初步的议论。
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| 收稿时间： | 1984-03-19 |
RESEARCHES ON TURBIDITY AND OTHER GRAVITY FLOW SEDIMENTATION IN CHINA |
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| Institution: | Institute of Geology. Academia Sinica, Beijing |
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| Abstract: | In China, there has been a rapid development of research on turbidity and other gravity flow sediments since middle 1970's. The First National Symposium on Tur-bidite was held in Nanning, Guangxi, China from 14th to 21st October,1983.Twenty seven papers about turbidite and other gravity flow sediments were read out at the meeting. This symposium will undoubtedly bring about a great advance in the study of turbidity and other gravity flow sedimentations. In this paper, the development in researches on turbidity and other gravity flow sedimentations has been summarized. In the last ten years,the researches showed that gravity flow deposits were widespread both in geologic time and space. It was reported that turbidites were spreaded in Late Archean,Proterozoic, Cambrian, Ordovician, Silurian, Devonian, Carboiferous,Permian,Triassic,Jurassic, Cretaceous,Tertiary and Quaternary. The locations at which turbidite occurred were dispersed almost in every province of China. The Paleogeographic environments in which turbidite was formed were of great variety, including modern and ancient fault lake basin, continental rift, aulacogen, foreand back-arc basin, slope of sea mount, ocean basin and passive continental margin, etc. It has been found that some pyroclastic turbidites with great thickness are spread extensively such as those in middle-late Permian and early Triassic in Yunnan-Guizhou-Guangxi basin. Some new types of turbidites have been reported, e. g. the ophiolite-fragment turbidite from Cretaceous in Tibet and tuff-bearing siliceous turbidite within Proterozoic Yanbian ophiolite suite, Sichuan Province. There have been some results in the study on carbonate gravity flow sediments. For example, Mei Zhichao et al. ( 1982 ) reported the carbonate debris flow sediments from Middle Ordovician in Shaanxi Province and Gao Zhenzhong and Liu Huai-po(1983) studied the Triassic carbonate gravity flow deposit in Shiwandashan Mountain Range. Based on these results, several models of gravity flow sedimentations have been established and some inferences have been made about the tectonic sitting in which these sediments deposited. The potential resources in turbidites and other gravity flow deposits have been explored. Turbidite hydrocarbon reservoirs are found in many oil fields. Li Jiliang et al. ( 1978 ) reported the sedimentary characteristics of oil-bearing turbidite. According to the depositional trend, they predicated the existence of deltaic sand body which is confirmed now. It is noticed that there are metallogenetic conditions of multi-metal, gold and uranium in some turbidites. Some new methods have been used to study gravity flow sedimentation by Chinese sedimentologists, such as deep water sampling,seismic stratigraphic technique, x-ray photography and study of trace fossils. In this paper,some proposals for further research on gravity flow sedimentation have been put forward. |
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