泥河湾盆地沉积物粒度组分与磁化率变化相关性研究

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泥河湾盆地沉积物粒度组分与磁化率变化相关性研究

杨小强, 李华梅

文章导航 > 沉积学报 > 2002 > 20(4): 675-679

杨小强, 李华梅. 泥河湾盆地沉积物粒度组分与磁化率变化相关性研究[J]. 沉积学报, 2002, 20(4): 675-679.

引用本文:

杨小强, 李华梅. 泥河湾盆地沉积物粒度组分与磁化率变化相关性研究[J]. 沉积学报, 2002, 20(4): 675-679.

YANG Xiao qian, LI Hua mei. The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 675-679.

Citation:

YANG Xiao qian, LI Hua mei. The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 675-679.

杨小强, 李华梅. 泥河湾盆地沉积物粒度组分与磁化率变化相关性研究[J]. 沉积学报, 2002, 20(4): 675-679.

引用本文:

杨小强, 李华梅. 泥河湾盆地沉积物粒度组分与磁化率变化相关性研究[J]. 沉积学报, 2002, 20(4): 675-679.

YANG Xiao qian, LI Hua mei. The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 675-679.

Citation:

YANG Xiao qian, LI Hua mei. The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 675-679.

泥河湾盆地沉积物粒度组分与磁化率变化相关性研究

杨小强^1,2,
李华梅²

1 中山大学地球科学系,广州,510275;
2 中国科学院广州地球化学研究所,广州,510640

基金项目: 国家自然科学基金项目(批准号:40104002;49772139)资助

作者简介:
杨小强男 1972年出生博士环境磁学和第四纪环境

中图分类号: X141;P534.63

计量

文章访问数: 275
HTML全文浏览量: 23
PDF下载量: 28
被引次数: 0

The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin

YANG Xiao qian^1,2,
LI Hua mei²

1 Department of Earth Sciences, Sun Yat Sen University, Guangzhou 510275;
2 Guangzhou Institute of Geochemistry, CAS, Guangzhou 510640

摘要: 以泥河湾盆地郝家台剖面为例,分析沉积物粒级组分与磁化率大小变化的相关性。从厚约 12 2m的剖面选取 80 0多个样品,分别测试从 0.2～ 5 0 0 μm各个粒度区间颗粒的百分含量和质量磁化率。通过计算它们之间的相关关系,认为湖相沉积物磁化率的变化与 0.2～ 35 μm间细粒物质的含量,特别是与 0.2～ 7.5 μm区间悬浮物质的含量反相关,而与 35～ 5 0 0 μm间较粗粒物质的含量正相关。这种相关性与顶部的黄土堆积刚好相反,反映了二者之间磁化率不同的变化机制。据此可认为以外源碎屑输入为主的湖泊中,沉积物磁化率的变化主要受控于外源铁磁性矿物,它反映了湖水面的升降,蕴涵着一定的古气候信息。
- 郝家台剖面 /
- 沉积物粒级组分 /
- 磁化率
Abstract: The different grain size content range from 0. 2～ 500 μ m and magnetic susceptiblity were measured to study the correlation between grain size and magnetic susceptibilty, selected more 800 samples, in Lacustrine sedi-ments from Nihewan Bain. The correlation coefficient of susceptibility with the content of 0. 2～ 35 μ m, especially 0.2～ 7.5 μ m, is positive, and with the content of 35～ 500 μ m is negative. This correlation is contrast to the loess deposits on top of profile, which shows the mechanism of magnetic response towardspaleoclimate changes in lacus-trine sediments is unlike that in loess. So, we can conclude that the susceptibility change in lake ( the sedimentsare mainly allogenic)sediments is controlled by the allogenic magnetic minerals. The fluctuations of susceptibilty indi-cate the changes of the lake level and paleoclimate.
- Haojiatai Section /
- the content of the different grain gize /
- magnetic susceptibility

参考文献(16)

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[2]	安芷生, 吴锡浩. 最近2万年中国古环境变迁的初步研究. 黄土(第四纪地质)全球变化[C].1990. 1～26 [An Zhisheng, Wu Xihao. A pilot study about Chinese paleoenvironment evolution last 20kyr, Loess ( Quaternary Geology) Global Change, 1990.1～26]
[3]	Rosenbaum J G. A Record of middle Pleistocene climate change from Buck Lake, Cascade range, southern Oregon-Evidence from sediment magnetism, trace-element geochemistry, and pollen[J]. Geological Society of American Bulletin, 1996, 108(10):1 328～1 332
[4]	胡守云,王苏民,Appel E等. 呼伦湖湖泊沉积物磁化率变化的环境磁学机制[J]. 中国科学(D),1998, 28(4): 334～339[Hu Shouyun, Wang Sumin, Appel E. Environmental magnetism mechanism of susceptibility changes in Hulun lake sediments[J]. Science in China(D), 1998, 28(4): 334～339]
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[6]	Roy Thompson & Frank Oldfield. Environmental magnetism[M]. London: Allen & Unwin, 1986
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[11]	Hilton J, Lishman J P. The effect of redox change on the magnetic susceptibility of sediments from a seasonally anoxic lake[J]. Limnol. Oceanogr., 1985, 30: 907～909
[12]	杨小强,李华梅. 泥河湾盆地典型剖面沉积物磁化率特征及其意义[J]. 海洋地质与第四纪地质,1999, 19(1): 75～84 [Yang Xiaoqiang, Li Huamei. The susceptibility characteristics of the typical sections in Nihewan basin and its implication[J]. Marine Geology & Quaternary Geology, 1999,19(1):75～84]
[13]	Jef Vandenberghe, An Zhisheng. New absolute time scale for the Quaternary climate in the Chinese loess region by grain-size analysis[J]. Geology, 1997, 25(1): 35～38
[14]	鹿化煜、安芷生. 黄土高原黄土粒度组成的古气候意义[J]. 中国科学(D),1998, 3: 278～283[Lu, Huayu, An Zhisheng. Paleoclimatic significance of grain size of loess-palaeosol deposit in Chinese Loess Plateau[J]. Science in China(Series D, Earth Sciences), 1998, 41:626～631 1 006～1 313]
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计量

文章访问数: 275
HTML全文浏览量: 23
PDF下载量: 28
被引次数: 0

泥河湾盆地沉积物粒度组分与磁化率变化相关性研究

杨小强^1,2,
李华梅²

1 中山大学地球科学系,广州,510275;

2 中国科学院广州地球化学研究所,广州,510640

基金项目: 国家自然科学基金项目(批准号:40104002;49772139)资助

作者简介:
杨小强男 1972年出生博士环境磁学和第四纪环境

收稿日期: 2001-06-25
修回日期: 2002-05-09

中图分类号: X141;P534.63

关键词:

郝家台剖面 /

沉积物粒级组分 /

摘要: 以泥河湾盆地郝家台剖面为例,分析沉积物粒级组分与磁化率大小变化的相关性。从厚约 12 2m的剖面选取 80 0多个样品,分别测试从 0.2～ 5 0 0 μm各个粒度区间颗粒的百分含量和质量磁化率。通过计算它们之间的相关关系,认为湖相沉积物磁化率的变化与 0.2～ 35 μm间细粒物质的含量,特别是与 0.2～ 7.5 μm区间悬浮物质的含量反相关,而与 35～ 5 0 0 μm间较粗粒物质的含量正相关。这种相关性与顶部的黄土堆积刚好相反,反映了二者之间磁化率不同的变化机制。据此可认为以外源碎屑输入为主的湖泊中,沉积物磁化率的变化主要受控于外源铁磁性矿物,它反映了湖水面的升降,蕴涵着一定的古气候信息。

English Abstract

杨小强, 李华梅. 泥河湾盆地沉积物粒度组分与磁化率变化相关性研究[J]. 沉积学报, 2002, 20(4): 675-679.

引用本文:

杨小强, 李华梅. 泥河湾盆地沉积物粒度组分与磁化率变化相关性研究[J]. 沉积学报, 2002, 20(4): 675-679.

YANG Xiao qian, LI Hua mei. The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 675-679.

Citation:

YANG Xiao qian, LI Hua mei. The Correlation between the Content of the Different Grain Size and Magnetic Susceptibility in Lacustrine Sediments, Nihewan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 675-679.

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