Magnetic Susceptibility and Rb/Sr Ratio of Peat Stratum in Tiantangzhai and Its Significance of Palaeoclimate

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  • 1. Department of Urban Construction and Environmental Science, Wanxi College, Lu’an, Anhui 237012;
    2. College of Geography and Marine Science, Nanjing University, Nanjing, Jiangsu 210093

Received date: 2005-12-08

  Revised date: 2006-04-09

  Online published: 2007-05-20

Abstract

A typical peat profile of Tiantangzhai in the Dabie Mountains was chosen for this study.The vertical distribution of magnetic susceptibility and Rb/Sr elements in the sediments of the profile was determined.Its implication for the palaeoclimatic change of the north subtropics in the Holocene were discussed.By means of magnetic susceptibility and Rb and Sr concentration analyses, combined with 14C dating,regional palaeoclimatic changes were divided into five periods since the middle and late Holocene:(1) warm-wet period of 5700-5050 cal.a B.P.;(2) warm-dry period of 5050-4300 cal.a B.P.,and during which climate fluctuated acutely,druing which abrupt climatic change occurred in 4600-4500 cal.a B.P.;(3) relatively cool-wet period of 4300-1400 cal.a B.P.,climate fluctuated gently;(4) relatively warm-dry period of 1400-800 cal.a B.P.;(5) cool-dry period from 1400 cal.a B.P.to nowadays,but temperature ascends again in modern times.Magnetic susceptibility and Rb/Sr ratio can be used as palaeclimatic proxy to identify peat records.Low magnetic susceptibility and Rb/Sr ratio indicate cool-dry climate condition,by contraries,high magnetic susceptibility and Rb/Sr ratio indicate warm-wet climate condition.

Cite this article

HUANG Run, ZHU Cheng, WANG Sheng-Tang . Magnetic Susceptibility and Rb/Sr Ratio of Peat Stratum in Tiantangzhai and Its Significance of Palaeoclimate[J]. SCIENTIA GEOGRAPHICA SINICA, 2007 , 27(3) : 385 -389 . DOI: 10.13249/j.cnki.sgs.2007.03.385

References

[1] 何报寅,张穗,蔡述明.近2 600年神农架大九湖泥炭的气候变化记录[J].海洋地质与第四纪地质,2003,23(2):109~115.
[2] 夏玉梅.大小兴安岭高位泥炭孢粉纪录及泥炭发育和演替过程研究[J].地理科学,1996,16(4):337~344.
[3] 杨永兴,黄锡畴,王世岩,等.西辽河平原东部沼泽发育与中全新世早期以来古环境演变[J].地理科学,2001,21(3):242~249.
[4] 杨永兴,王世岩.8.0 ka B.P.以来三江平原北部沼泽发育和古环境演变研究[J].地理科学,2003,23(1):32~38.
[5] 黄锡畴.试论沼泽的分布和发育规律[J].地理科学,1982,2(2):193~201.
[6] 张玉兰,杨永兴.中全新世以来黑龙江同江地区的孢粉组合与植被、气候演化[J].地理科学,2002,22(4):426~429.
[7] Williams M.Evidence for the dissolution of magnetite in recent Scottish Peat[J].Quaternary Research,1992,37:171-183.
[8] 李小强,赵宏丽,闫敏华,等.东北三江平原全新世火演化及其与植被和气候的关系[J].地理科学,2005,25(2):177~182.
[9] 王国平,刘景双,翟正丽.沼泽沉积剖面特征元素比值及其环境意义——盐碱化指标及气候干湿变化[J].地理科学,2005,25(3):335~339.
[10] 何华春,丁海燕,张振克,等.淮河中下游洪泽湖湖泊沉积物粒度特征及其沉积环境意义[J].地理科学,2005,25(5):590~596.
[11] 韩美,张丽娜.莱州湾南岸巨淀湖沉积地层分析与沉积环境辨识[J].地理科学,2005,25(6):678~682.
[12] 张玉兰,贾丽.上海东部地区晚第四纪沉积的孢粉组合及古环境[J].地理科学,2006,26(2):186~191.
[13] 杨东,方小敏,彭子成,等.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.
[14] 谢远云,李长安,王秋良,等.江汉平原9.0 ka B.P.以来的气候演化:来自江陵剖面沉积物记录[J].地理科学,2006,26(2):199~204.
[15] 殷书柏,吕宪国."泥炭气候成因说"的探讨[J].地理科学,2006,26(3):321~327.
[16] 郑朝贵,朱诚,高华中,等.南京江北地区晚更新世末期以来泥炭层δ13C记录的古气候变化[J].地理科学,2006,26(3):328~334.
[17] 王建力,王丽,何潇,等.重庆地区末次冰期气候变化的石笋记录研究[J].地理科学,2006,26(5):580~585.
[18] 贾铁飞,戴雪荣,张卫国,等.全新世巢湖沉积记录及其环境变化意义[J].地理科学,2006,26(6):706~711.
[19] 朱西德,王振宇,李林,等.树木年轮指示的柴达木东北缘近千年夏季气温变化[J].地理科学,2007,27(2):256~260.
[20] Xie S,Nott C,Avsejs L A,et al.Palaeoclimate records in compound-specific δD values of a lipid biomarker in ombrotrophic peat[J].Organic Geochemistry,2000,31:1053-1057.
[21] 叶笃正,陈绊勤.中国的全球变化预研究(第一部分)[M].北京:气象出版社,1992.
[22] 刘东生.黄土与环境[M].北京:科学出版社,1985.
[23] 庞奖励,黄春长,张占平.陕西岐山黄土剖面Rb、Sr组成与高分辩率气候变化[J].沉积学报,2001,19(4):637~641.
[24] 陈骏,安芷生,汪永进,等.最近800 ka洛川黄土剖面中Rb/Sr分布和古季风变迁[J].中国科学(D辑),1998,28(6):498~504.
[25] 李福春,谢昌仁,金章东,等.南京老虎山黄土剖面中铷锶地球化学和磁化率与古气候变化的关系[J].中国地质,2003,30(1):93~98.
[26] 金章东,王苏明,沈吉,等.小冰期弱化学风化的湖泊沉积记录[J].中国科学(D辑),2001,31(3):221~225.
[27] 杨晓强,李华梅.陆相断陷湖盆沉积物磁组构特征及其环境意义——以泥河湾盆地为例[J].海洋地质与第四纪地质,2000,20(3):43~52.
[28] 张振克,吴瑞金,王苏民.全新世大暖期云南洱海环境演化的湖泊沉积记录[J].海洋与湖沼,2000,31(2):110~114.
[29] 张玉芬,李长安,陈国金,等.江汉平原湖区周老镇钻孔磁化率和有机碳稳定同位素特征及其古气候意义[J].中国地质大学学报(地球科学),2005,30(1):114~120.
[30] 王开发.全新世温暖期中低温事件的初步研究[J].第四纪研究,1990,(2):168~174.
[31] 竺可帧.中国近5000年来气候变迁的初步研究[J].中国科学,1973,16(3):168~189.
[32] 姚檀栋.末期冰期青藏高原的气候突变——古里雅与格陵兰GRIP冰芯对比研究[J].中国科学(D辑),1999,29(2):126~137.
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