长江口沉积物<sup>210</sup>Pb分布及沉积环境解释

段凌云; 王张华; 李茂田; 潘建明; 陈中原; Yishiki Saito; Yutaka kanai

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长江口沉积物²¹⁰Pb分布及沉积环境解释

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai

文章导航 > 沉积学报 > 2005 > 23(3): 514-522

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物210Pb分布及沉积环境解释[J]. 沉积学报, 2005, 23(3): 514-522.

引用本文:

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物²¹⁰Pb分布及沉积环境解释[J]. 沉积学报, 2005, 23(3): 514-522.

DUAN Ling-yun, WANG Zhang-hua, LI Mao-tian, PAN Jian-ming, CHEN Zhong-yuan, Yishiki SAITO, Yutaka KANAI. 210 Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment[J]. Acta Sedimentologica Sinica, 2005, 23(3): 514-522.

Citation:

DUAN Ling-yun, WANG Zhang-hua, LI Mao-tian, PAN Jian-ming, CHEN Zhong-yuan, Yishiki SAITO, Yutaka KANAI. ²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment[J]. Acta Sedimentologica Sinica, 2005, 23(3): 514-522.

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物210Pb分布及沉积环境解释[J]. 沉积学报, 2005, 23(3): 514-522.

引用本文:

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物²¹⁰Pb分布及沉积环境解释[J]. 沉积学报, 2005, 23(3): 514-522.

Citation:

长江口沉积物²¹⁰Pb分布及沉积环境解释

1.
华东师范大学地理系,上海 200062;
2.
华东师范大学河口海岸国家重点实验室,上海 200062;
3.
国家海洋局第二海洋研究所,杭州 310012;
4.
MRE, Geological Survey of Japan, A IST, Central 7, Higashi 12121, Tsukuba, Ibaraki 30628567, Japan;
5.
RCDME, Geological Survey of Japan, A IST, Central 7, Higashi 12121, Tsukuba, Ibaraki 30628567, Japan

基金项目: 国家重点基础研究发展规划项目(2002CB412505)资助

详细信息

作者简介:
段凌云，女，1980年出生，硕士研究生，自然地理学。

中图分类号: P512.2

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文章访问数: 575
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PDF下载量: 870
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²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

1.
Department of Geography, East China Normal University, Shanghai 200062;
2.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062;
3.
Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012;
4.
MRE, Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1,Tsukuba, Ibaraki 306-8567, Japan;
5.
RCDME, Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1,Tsukuba, Ibaraki 306-8567, Japan

摘要

摘要: 在长江河口潮滩、分流河道和水下三角洲共获得18个柱样,进行沉积学分析和²¹⁰Pb测定,并对其中6根柱样进行¹³⁷Cs测定。经研究发现,长江口外在水深25～30m,122°30′N,31°00′E附近存在一个泥质沉积中心,沉积速率达2.0～6.3cm/yr。另外,在潮滩和涨潮槽也获得较高沉积速率,其中南汇和横沙岛潮滩沉积速率(1.03～1.94cm/yr)高于崇明东滩(0.51～0.76cm/yr),涨潮槽沉积速率也达0.86cm/yr。此外,在石洞口、南汇、九段沙潮滩和三角洲前缘有部分柱样未获沉积速率,推测为沉积环境不稳定或沉积速率过快所致。
- 沉积速率 /
- ²¹⁰Pb /
- 长江口
Abstract: Eighteen sediment vibrocores, 0.2～6 m long, were collected from the Yangtze estuary in different sedimentary facies, including tidal flat, flood tidal channel, delta front, prodelta and delta-shelf transition zone, to examine the modern depositional characteristics in the study area. Measurement of ²¹⁰ Pb was performed for all sediment vibrocores and 137Cs app lied for 6 of them. CIC ( constant initial concentration) datingmodelwas used to calculate the sedimentation rate using ²¹⁰ Pb data. The results obtained show the silty clay and clayey silt in the tidal flat and tidal channel, fine sand and silt in the delta front facies. Fine-grained sediment, mostly the clayey silt, consists of the pro-delta facies, and clay-silt-sand constitutes the delta-shelf transition zone. On the basis of relative continuous sediment record, our radiometric measurement demonstrates that the highest sedimentation rates ( ～2.0 to 6.0 cm /yr) were found in the prodelta facies, reflecting p rocesses of the interface of estuarine mixed water and the seawater. Lower sedimentation rate of 0.81 cm /yr can be recognized form the prodelta margin, but the rate is hardly recorded in the delta-transition zone due to terminatingmodern sedimentation seaward.The higher sedimentation rates (1.03～1.94 cm /yr) occur in the tidal flat of Hengsha Island and Nanhui, and lower ones (0.51～0.76 cm /yr) in the Chongming Island,indicating the southeastward transport of the suspended sediment in the Changjiang estuary. The sedimentation rate in the flood tidal channel is about 0.69～0.86 cm /yr, showing the rapid deposition due to the discrete flood and ebb currents. The sedimentation rates proposed here is of significance to evaluate the sediment budget from the up stream in the past centennial time scale and in particular is to provide an analogue for after Damming study at Three-Gorges
- sedimentation rate /
- radiometric analysis of ²¹⁰ Pb /
- Yangtze estuary

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参考文献(1)

[1]

1 范德江,杨作升,郭志刚. 中国陆架210Pb测年应用现状与思考[J].地球科学进展,2000, (03):297-302.

2 夏小明,谢钦春,李炎. 东海沿岸海底沉积物中的137Cs、210Pb分布及其沉积环境解释[J].东海海洋,1999,(01):20-27.

3 万国江. 现代沉积的210Pb计年[J].第四纪研究,1997,(03):230-239.

4 项亮. 用γ分析方法研究滇池现代沉积年代[J].核技术,1997,(02):100-104.

5 叶崇开. 137Cs法和210pb法对比研究鄱阳湖近代沉积速率[J].沉积学报,1991,(01):106-114.

6 DeMaster D J,Mckee B A,Nittrouer C A. Rates of sediment accumulation and particle reworking based on radiochemical measurements from continental shelf deposits in the East China Sea[J].Continental Shelf Research,1985.143-158.

7 刘国贤,杨松林,周义华. 用210Pb法测定长江口沉积速率[J].海洋地质与第四纪地质,1984,(01):113-116.

8 李从先,王平,范代读. 潮汐沉积率与沉积间断[J].海洋地质与第四纪地质,1999,(02):11-18.

9 董永发,丁文鋆. 长江河口沉积物粒度特征与水动力的关系[A].上海:上海科学技术出版社,1988.314-322.

10 Milliman John D,Shen Huanting,Yang Zuosheng. Transport and deposition of river sediment in the Changjiang estuary and adjacent continental shelf[J].Continental Shelf Research,1985.37-45.

11 夏小明,杨辉,李炎. 长江口-杭州湾毗连海区的沉积速率[J].沉积学报,2004,(01):130-135.

12 刘清玉,戴雪荣,何小勤. 崇明东滩环境探讨[J].海洋地质动态,2003,(12):1-4.

13 潘定安,胡方西,周月琴. 长江河口夏季的盐淡水混合[A].上海:上海科学技术出版社,1988.151-165.

14 陈中原,周长振,杨文达. 长江口外现代水下地貌与沉积[A].上海:华东师范大学出版社,1987.238-245.

15 Beardsley R C,Limeburner R,Yu H. Discharge of the Changjiang(Yangtze River) into the East China Sea[J].Continental Shelf Research,1985.57-76.

16 沈焕庭,潘定安. 长江河口最大浑浊带[M].北京:海洋出版社,2001.29-30.

17 陈吉余,朱慧芳,董永发. 长江河口及其水下三角洲的发育[A].上海:上海科学技术出版社,1988.48-62.

18 沈焕庭,李九发,朱慧芳. 长江河口悬沙输移特性[A].上海:上海科学技术出版社,1988.205-215.

19 沈焕庭,潘定安. 长江河口最大浑浊带[M].北京:海洋出版社,2001.50-51.

20 杨世伦,赵庆英,丁平兴. 上海岸滩动力泥沙条件的年周期变化及其与滩均高程的统计显示[J].海洋科学,2002,(02):37-41.

21 杨世伦,时钟,赵庆英. 长江口潮沼植物对动力沉积过程的影响[J].海洋学报(中文版),2001,(04):75-80.

22 陈吉余,恽才兴,徐海根. 两千年来长江口发育的模式[A].上海:上海科学技术出版社,1988.31-37.

23 刘高峰,沈焕庭,王永红. 长江口涨、落潮槽底沙输移趋势探讨[J].海洋通报,2003,(04):1-7.

24 沈焕庭,郭成涛,朱慧芳. 长江河口最大混浊带的变化规律及其成因探讨[A].上海:上海科学技术出版社,1988. 216-228.

25 Chen Zhongyuan,Saito Yoshiki,Kanai Yutaka. Low concentration of heavy metals in the Yangtze estuarine sediments[M].China: a diluting setting. Estuarine Coastal and Shelf Science,2004.1-10.

26 杨世伦,贺松林,谢文辉. 长江口九段沙的形成演变及其南北槽发育的关系[J].海洋工程,1998,(04):55-65.

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长江口沉积物²¹⁰Pb分布及沉积环境解释

1. 华东师范大学地理系,上海 200062;

2. 华东师范大学河口海岸国家重点实验室,上海 200062;

3. 国家海洋局第二海洋研究所,杭州 310012;

4. MRE, Geological Survey of Japan, A IST, Central 7, Higashi 12121, Tsukuba, Ibaraki 30628567, Japan;

5. RCDME, Geological Survey of Japan, A IST, Central 7, Higashi 12121, Tsukuba, Ibaraki 30628567, Japan

基金项目: 国家重点基础研究发展规划项目(2002CB412505)资助

作者简介:
段凌云，女，1980年出生，硕士研究生，自然地理学。

收稿日期: 2004-10-26
修回日期: 2005-03-17
刊出日期: 2005-09-10

中图分类号: P512.2

关键词:

沉积速率 /

²¹⁰Pb /

长江口

摘要: 在长江河口潮滩、分流河道和水下三角洲共获得18个柱样,进行沉积学分析和²¹⁰Pb测定,并对其中6根柱样进行¹³⁷Cs测定。经研究发现,长江口外在水深25～30m,122°30′N,31°00′E附近存在一个泥质沉积中心,沉积速率达2.0～6.3cm/yr。另外,在潮滩和涨潮槽也获得较高沉积速率,其中南汇和横沙岛潮滩沉积速率(1.03～1.94cm/yr)高于崇明东滩(0.51～0.76cm/yr),涨潮槽沉积速率也达0.86cm/yr。此外,在石洞口、南汇、九段沙潮滩和三角洲前缘有部分柱样未获沉积速率,推测为沉积环境不稳定或沉积速率过快所致。

English Abstract

²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

1. Department of Geography, East China Normal University, Shanghai 200062;

2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062;

3. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012;

4. MRE, Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1,Tsukuba, Ibaraki 306-8567, Japan;

5. RCDME, Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1,Tsukuba, Ibaraki 306-8567, Japan

Received Date: 2004-10-26
Rev Recd Date: 2005-03-17
Publish Date: 2005-09-10

Keywords:

Abstract: Eighteen sediment vibrocores, 0.2～6 m long, were collected from the Yangtze estuary in different sedimentary facies, including tidal flat, flood tidal channel, delta front, prodelta and delta-shelf transition zone, to examine the modern depositional characteristics in the study area. Measurement of ²¹⁰ Pb was performed for all sediment vibrocores and 137Cs app lied for 6 of them. CIC ( constant initial concentration) datingmodelwas used to calculate the sedimentation rate using ²¹⁰ Pb data. The results obtained show the silty clay and clayey silt in the tidal flat and tidal channel, fine sand and silt in the delta front facies. Fine-grained sediment, mostly the clayey silt, consists of the pro-delta facies, and clay-silt-sand constitutes the delta-shelf transition zone. On the basis of relative continuous sediment record, our radiometric measurement demonstrates that the highest sedimentation rates ( ～2.0 to 6.0 cm /yr) were found in the prodelta facies, reflecting p rocesses of the interface of estuarine mixed water and the seawater. Lower sedimentation rate of 0.81 cm /yr can be recognized form the prodelta margin, but the rate is hardly recorded in the delta-transition zone due to terminatingmodern sedimentation seaward.The higher sedimentation rates (1.03～1.94 cm /yr) occur in the tidal flat of Hengsha Island and Nanhui, and lower ones (0.51～0.76 cm /yr) in the Chongming Island,indicating the southeastward transport of the suspended sediment in the Changjiang estuary. The sedimentation rate in the flood tidal channel is about 0.69～0.86 cm /yr, showing the rapid deposition due to the discrete flood and ebb currents. The sedimentation rates proposed here is of significance to evaluate the sediment budget from the up stream in the past centennial time scale and in particular is to provide an analogue for after Damming study at Three-Gorges

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物210Pb分布及沉积环境解释[J]. 沉积学报, 2005, 23(3): 514-522.

引用本文:

段凌云, 王张华, 李茂田, 潘建明, 陈中原, Yishiki Saito, Yutaka kanai. 长江口沉积物²¹⁰Pb分布及沉积环境解释[J]. 沉积学报, 2005, 23(3): 514-522.

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[2]	李忠. “从最高到最深”—从第17届国际沉积学大会看沉积学研究前沿 . 沉积学报, 2006, 24(06): 928-933.

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长江口沉积物²¹⁰Pb分布及沉积环境解释

作者简介:
段凌云，女，1980年出生，硕士研究生，自然地理学。

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²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

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长江口沉积物²¹⁰Pb分布及沉积环境解释

作者简介:
段凌云，女，1980年出生，硕士研究生，自然地理学。

English Abstract

²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

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长江口沉积物210Pb分布及沉积环境解释

作者简介: 段凌云，女，1980年出生，硕士研究生，自然地理学。

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210 Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

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长江口沉积物210Pb分布及沉积环境解释

作者简介: 段凌云，女，1980年出生，硕士研究生，自然地理学。

English Abstract

210 Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

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联系我们

长江口沉积物²¹⁰Pb分布及沉积环境解释

作者简介:
段凌云，女，1980年出生，硕士研究生，自然地理学。

²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment

长江口沉积物²¹⁰Pb分布及沉积环境解释

作者简介:
段凌云，女，1980年出生，硕士研究生，自然地理学。

²¹⁰ Pb Distr ibution of the Changjiang Estuarine Sediment and the Implications to Sedimentary Environment