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地理科学 >

2008 , Vol. 28 >Issue 5: 683 - 687

DOI: https://doi.org/10.13249/j.cnki.sgs.2008.05.683

论文

郑州全新世黄土的颗粒形态特征及其环境意义

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  • 1. 陕西师范大学旅游与环境学院, 陕西 西安 710062;
    2. 中国科学院地球 环境研究所黄土与第四纪地质国家重点实验室, 陕西 西安 710075
庞奖励(1963- ),男,陕西西安市人,教授,博士,主要从事资源开发与环境演变的研究。E-mail:jlpang@snnu.edu.cn

收稿日期: 2007-09-29

  修回日期: 2007-12-04

  网络出版日期: 2008-09-20

基金资助

国家自然科学基金项目(40471119,40571154)、黄土与第四纪地质国家重点实验室基金(SKLLQG0604)、陕西省自然基金(2006D01)项目资助。

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Micromorphological Features of Particlesof Holocence Loess at Zhengzhou Areas, China and Their Environmental Significance

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  • 1. College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi’an, Shaanxi 710062;
    2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, Shaanxi 710075

Received date: 2007-09-29

  Revised date: 2007-12-04

  Online published: 2008-09-20

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摘要

用偏光显微镜和图像处理软件对黄土颗粒形态进行观察和定量分析,用激光粒度仪测量黄土的粒度分布。结果表明:郑州地区黄土中颗粒的一般呈次圆状-圆状,具有较高的圆度和球度;矿物组合以石英和长石占绝对优势,但郑州黄土中石英/长石比值和C/F(10 μm)值高于关中黄土;郑州黄土粒度峰值集中在50~80 μm且曲线形态较陡,而关中黄土粒度峰值在20~40 μm且曲线形态较缓。综合分析认为,郑州地区黄土可能来源于孟津以东的黄河冲积扇,应属于近源黄土。

本文引用格式

庞奖励, 黄春长, 查小春, 祝一志 . 郑州全新世黄土的颗粒形态特征及其环境意义[J]. 地理科学, 2008 , 28(5) : 683 -687 . DOI: 10.13249/j.cnki.sgs.2008.05.683

Abstract

Using the particle data obtained from the Holocene soil profile at LGT, JYC sites in the Guanzhong area and at PLG, SBLH sites in the Zhengzhou, this article attempts to illustrate the material source of Zhengzhou loess and its environmental significance.The micromorphology was observed under a petrographic microscope, and its image was quantificationally measured by NIKON NIS-ELments BR2.2 software.Particle size distribution was determined by a Malvern Mastersizer-S and with Na4P2O7 as a dispersant.Micromorphological observation of the thin sections shows that the grain-shape of Zhengzhou loess is characterized by sub-round or round, with higher length/width ratio, and that of the Guanzhong loess by sub-angular or angular, with strip, triangular and irregular shapes.Comparison with the Guanzhong loess, the coarse of Zhengzhou loess is characterized by higher Length, Area, EqDiameter, Perimeter, Elongation and Roundness, and K1,K2,K3,K4 value are more than 1.It suggest that the particle in the Zhengzhou loess has higher roundness and sphericity and has gone through stronger hydraulic abrasion.The assemblage of minerals in both loess is mainly composed of Q and Pl.However, Q+Pl content, Q/Pl ratio and C/F10μm ratio are clear higher in Zhengzhou loess than in Guanzhong loess.Research result shows that particle-size of both loess falls in the same range, within particle-size range of aeloian, but peak value of particle-size of Zhengzhou loess ranges in 50-80 μm with steep particle-size curve and that of Guanzhong loess is in 20-40 μm with slow particle-size curve.All the results of this study suggest that Zhengzhou loess is aeolian, which has synchronously both aeolian and alluvium features.However its material source differs from Guanzhong loess, and it came from various loose river sediments at the Huanghe (Yellow) River alluvial fan in the east of Mengjin and transported by northeastern wind.

参考文献

[1] 李丰江,吴乃琴,Denis-Didier Rousseau.黄土高原秦安中新世黄土-古土壤序列的蜗牛化石初步研究[J].中国科学(D辑),2006,36 (5):438~444.
[2] 徐树建,潘保田,高红山,等.末次间冰期- 冰期旋回黄土环境敏感粒度组分的提取及意义[J].土壤学报,2006,143(12):183~189.
[3] 杨 东,方小敏,彭子成.陇西六盘山黄土及最近1.8 Ma B.P.以来的构造运动与气候变化[J].地理科学,2006,26(2):192~198.
[4] 杨建平,丁永建,陈仁升,等.亚洲季风与中国干湿、农牧气候界线之关系[J].地理科学,2005,25(4):441~447.
[5] 毛龙江,黄春长,庞奖励.泾河中游地区全新世成壤环境演变研究[J].地理科学,2005,25(4):478~483.
[6] 庞奖励,黄春长.关中地区新石器文化发展与环境演变耦合关系研究[J].地理科学,2003,23(4):449~454.
[7] 贾蓉芬,彭先芝.西峰剖面有机质记录的黄土高原L6-L1古湿度演变[J].地理科学,2004,24(6):693~697.
[8] Sun D H,Bloemendal J,Rea D K,et al .Grain size distribution function of polymodal sediments in hydraulic and aeolian environments ,and numerical partitioning of the sedimentary components[J].Sedimentary Geology,2002,152:263 – 277.
[9] 熊尚发,刘东生,丁仲礼.两个冰期-间冰期旋回的黄土记录及其古气候意义[J].地理科学,2002,22(1):18~23.
[10] 赵景波.西安和宝鸡第5层古土壤铁质粘土结核的发现与研究[J].地理科学,2002,22(4):420~427.
[11] Guo Z T,Ruddiman W F,Hao Q Z,et al.Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China[J].Nature,2002,416:159-163.
[12] Xiao J L,Porter S C,An Z S,et al .Grain size of quartz as an indicator of winter monsoon strength on the Loess Plateau of central China during the last 130 000 yr[J].Quaternary Research ,1995 ,43 (1):22-29.
[13] 吴锡浩,蒋复初,肖华国,等.中原邙山黄土及最近200 ka 构造运动与气候变化[J].中国科学(D 辑) ,1999,29 (1) :75~ 81.
[14] 季军良,郑洪波,刘 锐,等.邙山黄土地层再研究[J].海洋地质与第四纪地质,2004,24(4) :101~ 107.
[15] 蒋复初,王书兵,赵志中,等.中原邙山黄土与末次间冰期以来的古季风特征[J].地质论评,2004,50(5):554 ~560.
[16] 杨革联,赵希涛,朱日祥,等.河南荥阳孤柏嘴黄土剖面磁性地层学初步研究[J].现代地质,2001,15(1):35~39.
[17] 曾庆有,郑洪波,朱日祥,等.邙山黄土Laschamp事件的缺失及成因探讨[J].海洋地质与第四纪地质,2002,22(1):89~95.
[18] 杨一鸣,黄春长,庞奖励.淮河上游全新世风成黄土-土壤物质来源研究[J].地理与地理信息科学,2005,21(1):43~46.
[19] 刘东生.黄土与环境[M].北京:科学出版社,1985:1~412.
[20] 马程远.豫东、豫北风沙问题的初步分析[J].中国沙漠,1982,29(2):17~24.
[21] 张 霞,王建玲,闫惠芳.郑州地区沙尘暴天气的气候特征分析[J].河南气象,2002,(3):19~20.
[22] 付光轩,刘军臣,刘和平.近40 年河南沙尘暴、扬沙和浮尘气候特征分析[J].河南气象,2002 ,(1):22~24.
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