顺直河道中沉积物的粒度及重矿物分布规律&mdash;&mdash;室内大型水槽实验

叶玮

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顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

叶玮

文章导航 > 沉积学报 > 1998 > 16(2): 134-138

叶玮. 顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验[J]. 沉积学报, 1998, 16(2): 134-138.

引用本文:

叶玮. 顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验[J]. 沉积学报, 1998, 16(2): 134-138.

Ye Wei. A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations[J]. Acta Sedimentologica Sinica, 1998, 16(2): 134-138.

Citation:

Ye Wei. A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations[J]. Acta Sedimentologica Sinica, 1998, 16(2): 134-138.

叶玮. 顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验[J]. 沉积学报, 1998, 16(2): 134-138.

引用本文:

叶玮. 顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验[J]. 沉积学报, 1998, 16(2): 134-138.

Ye Wei. A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations[J]. Acta Sedimentologica Sinica, 1998, 16(2): 134-138.

Citation:

Ye Wei. A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations[J]. Acta Sedimentologica Sinica, 1998, 16(2): 134-138.

顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

叶玮

中国科学院新疆地理研究所乌鲁木齐 830011

详细信息

作者简介:
叶玮,女,41岁,副研究员,自然地理

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文章访问数: 462
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A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations

Ye Wei

Xinjiang Institute of Geography, Chinese Academy of Sciences, Urumqi 830011

摘要

摘要: 大型室内水槽重复实验表明，在顺直河道中，分选作用导致了从上游至下游表层沉积物粒径变细、重矿物含量增加。不同河床微地形对重矿物的富集能力不同。在平面上，深槽和浅滩迎水坡为重矿物富集区。在剖面上，则存在表层富集层、埋藏富集层和残留富集层三种富矿层。重矿物在河道中的富集规律表明。侵蚀作用在重矿物富集过程中扮演着重要色。
- 顺直河道 /
- 粒度 /
- 重矿物
Abstract: The flume study was made at Environment Research Center of Tsukuba University, Japan. The observation of the bedload transportation and the grain size analysis of samples collected along the channel from upper to downstream showed that selective sorting plays a very important part in heavy mineral concentrations. The results were as follows: 1) The sediment from superficial layer was fining downst reamward. As a result, the percentage of heavy mineral fractions increased with increasing distance off the flume inlet. The longer the distance, the higher the percentage was. The maximum reached 48% near the flume outlet, whereas the initial population was lower than 5%. 2) Heavy particles were characterized by good sorting and fine diameter size. Mean particle size ranged from 1.5 to 2.5φ. Major content was fine sand. 3) The percentage of the heavy mineral fractions changed with the variation of bedforms. Stoss side of a bar, trough and pool were traps of heavy particles. 4) According to the texture of the sediment, a bar was divided into three parts. The superficial layer of the tail was observed to contain large amount of fine and medium sand and to be rich in heavy minerals. In contrast, the head of a bar was mainly composed of gravel and coarse sand, which contains few heavy particles. The body of a bar mediated between the tail and head. 5) On transection, three layers with abundant heavy minerals were observed, but only the lag layer was continuous and signified to forming placers.
- straight stream channel /
- grain size /
- heavy mineral

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参考文献(15)

[1]	.Mosley M P, et al. Hardw are models in geomorphology. Progress in Physical Geography, 1978, 2: 438～461
[2]	.Flueck J A. The role of statistics in weather modification experiments. Atmosphere Ocean, 1978, 16: 60～80
[3]	.Choley R J. Models in geomorphology. Metheun, London, 1967. 59～96
[4]	.Colby B R. Fluvial sediments-a summary of source, transport, deposition and measurement of sediment discharge. U S Geo. Survey Bull., 1963, 1181
[5]	.Ashmor P E. Laboratory modelling of gravel braided stream morphology. Earth Surface Processes and Landforms, 1982, 7: 201～225
[6]	.Stanley A Schumm, et al. Experimental Fluvial Geomorphology. New York: John Wiley and Sons Inc., 1987. 59～86
[7]	.Adams J. Basin dynamics, channel processes and placer formation, a model study. Economic Geology, 1978, 73: 416～426
[8]	.Curt D Peterson. Distribution, geometry, and origin of heavy mineral placer deposits on Oregon beaches. Journal of Sedimentary Petrology, 1986, 1: 67～77
[9]	.Paul D Komer. Processes of selective grain transport and the formation of placer on beaches. Journal of Geology, 1984, 92: 637～665
[10]	.Rudy L Slingerl and. The effects of entrainment on the hydraulic equivalence, relationships of light and heavy minerals in sands. Journal of Sedimentary Petrology, 1977, 47 (2): 753～770
[11]	.Qian Ning. Evolution of Channel. Beijing: Science Press, 1987. 243
[12]	.Thomas E Lisle. Formation of stationary alternate bars in a steep channel with mixed-size sediment, a flume experiment. Earth Surface Processes and Landforms, 1991, 16: 463～469
[13]	.Mark R Welford. A field test of Tubino model of alternate bar formation. Earth Surface Processes and Landforms, 1994, 19: 287～297
[14]	.Hirosh Ikeda. Experiments on bedload transport, bedforms and sedimentary structures using fine gravel in the 4m wide flume. E R C Papers, Tsukuba University, 1983, 2: 78
[15]	.Yoshinori Kodama. Effect of a rasion on downsteam gravelsize reduction in the Watarase River. Japan. E R C Papers, Tsukuba Univercity, 1992, 15: 88

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顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

叶玮

中国科学院新疆地理研究所乌鲁木齐 830011

作者简介:
叶玮,女,41岁,副研究员,自然地理

收稿日期: 1997-05-24
修回日期: 1997-07-28
刊出日期: 1998-06-10

关键词:

顺直河道 /

粒度 /

重矿物

摘要: 大型室内水槽重复实验表明，在顺直河道中，分选作用导致了从上游至下游表层沉积物粒径变细、重矿物含量增加。不同河床微地形对重矿物的富集能力不同。在平面上，深槽和浅滩迎水坡为重矿物富集区。在剖面上，则存在表层富集层、埋藏富集层和残留富集层三种富矿层。重矿物在河道中的富集规律表明。侵蚀作用在重矿物富集过程中扮演着重要色。

English Abstract

A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations

Ye Wei

Xinjiang Institute of Geography, Chinese Academy of Sciences, Urumqi 830011

Received Date: 1997-05-24
Rev Recd Date: 1997-07-28
Publish Date: 1998-06-10

Keywords:

Abstract: The flume study was made at Environment Research Center of Tsukuba University, Japan. The observation of the bedload transportation and the grain size analysis of samples collected along the channel from upper to downstream showed that selective sorting plays a very important part in heavy mineral concentrations. The results were as follows: 1) The sediment from superficial layer was fining downst reamward. As a result, the percentage of heavy mineral fractions increased with increasing distance off the flume inlet. The longer the distance, the higher the percentage was. The maximum reached 48% near the flume outlet, whereas the initial population was lower than 5%. 2) Heavy particles were characterized by good sorting and fine diameter size. Mean particle size ranged from 1.5 to 2.5φ. Major content was fine sand. 3) The percentage of the heavy mineral fractions changed with the variation of bedforms. Stoss side of a bar, trough and pool were traps of heavy particles. 4) According to the texture of the sediment, a bar was divided into three parts. The superficial layer of the tail was observed to contain large amount of fine and medium sand and to be rich in heavy minerals. In contrast, the head of a bar was mainly composed of gravel and coarse sand, which contains few heavy particles. The body of a bar mediated between the tail and head. 5) On transection, three layers with abundant heavy minerals were observed, but only the lag layer was continuous and signified to forming placers.

叶玮. 顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验[J]. 沉积学报, 1998, 16(2): 134-138.

引用本文:

叶玮. 顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验[J]. 沉积学报, 1998, 16(2): 134-138.

Ye Wei. A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations[J]. Acta Sedimentologica Sinica, 1998, 16(2): 134-138.

Citation:

Ye Wei. A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations[J]. Acta Sedimentologica Sinica, 1998, 16(2): 134-138.

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顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

作者简介:
叶玮,女,41岁,副研究员,自然地理

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A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations

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顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

中国科学院新疆地理研究所乌鲁木齐 830011

作者简介:
叶玮,女,41岁,副研究员,自然地理

English Abstract

A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations

Xinjiang Institute of Geography, Chinese Academy of Sciences, Urumqi 830011

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顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

作者简介: 叶玮,女,41岁,副研究员,自然地理

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A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations

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顺直河道中沉积物的粒度及重矿物分布规律——室内大型水槽实验

中国科学院新疆地理研究所 乌鲁木齐 830011

作者简介: 叶玮,女,41岁,副研究员,自然地理

English Abstract

A Flume Study on Grain Size Distributions of Sediments and Patterns of Heavy Mineral Concentrations

Xinjiang Institute of Geography, Chinese Academy of Sciences, Urumqi 830011

全文HTML

目录

友情链接

期刊在线

联系我们

作者简介:
叶玮,女,41岁,副研究员,自然地理

中国科学院新疆地理研究所乌鲁木齐 830011

作者简介:
叶玮,女,41岁,副研究员,自然地理