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古地理学报 ›› 2012, Vol. 14 ›› Issue (5): 663-672. doi: 10.7605/gdlxb.2012.05.011

• 地球化学及沉积环境 • 上一篇    下一篇

福建晋江科任剖面老红砂主元素反映的晚更新世以来气候变化*

赵 倩1，2，3 胡凡根1，2，3 李志忠1，2，3，4 陈秀玲1，2，3 靳建辉1，2，3 张 辉1，2，3   

  1. 1 福建师范大学地理研究所，福建福州 350007
    2 福建师范大学地理科学学院，福建福州 350007
    3 湿润亚热带生态—地理过程教育部重点实验室，福建福州 350007
    4 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
  • 收稿日期:2012-01-10 修回日期:2012-04-25 出版日期:2012-10-01 发布日期:2012-10-01
  • 作者简介:赵倩，女，1989年生，山东临沂人，理学硕士，研究方向为地貌与第四纪环境演变。E-mail:zhaoqian1987.xyz@163.com。
    通讯作者简介 李志忠，1962年生，四川绵阳人，理学博士，福建师范大学教授、博士生导师，主要从事风沙地貌与第四纪环境演变研究。E-mail:lizzfz@163.com。
  • 基金资助:
    国家自然科学基金项目（批准号：41271031）、中国科学院黄土与第四纪地质国家重点实验室开放基金项目（编号：SKLLQG1113）、福建省自然科学基金项目（编号：2009J01208）、福建省公益类科研院所专项基金项目（编号：2009R10039-4）和福建省大学生创新性实验计划项目（编号：FJNU2011-034）共同资助

Climate change during the Late Pleistocene indicated by major elements of “old red sand” in Keren section
at Jinjiang， Fujian Province

Zhao Qian1，2，3 Hu Fangen1，2，3 Li Zhizhong1，2，3，4 Chen Xiuling1，2，3 Jin Jianhui1，2，3 Zhang Hui1，2，3   

  1. 1 Institute of Geography，Fujian Normal University，Fuzhou 350007，Fujian
    2 School of Geography Science，Fujian Normal University，Fuzhou 350007，Fujian
    3 Key Laboratory of Humid Subtropical Ecosystem and Geography，Ministry of Education，Fuzhou 350007，Fujian
    4 State Key Laboratory of Loess and Quaternary Geology，Institute of Earth Environment，CAS，Xi′an 710075，Shaanxi
  • Received:2012-01-10 Revised:2012-04-25 Online:2012-10-01 Published:2012-10-01
  • About author:Zhao Qian，born in 1989，is a master candidate.She is mainly engaged in geomorphology and the Quaternary environment.
    About the corresponding author Li Zhizhong，born in 1962，is a professor and doctoral supervisor of Fujian Normal University，and is mainly engaged in aeolian geomorphology and the evolution of the Quaternary environment.

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摘要： 以福建晋江科任剖面老红砂为研究对象，对剖面主元素地球化学特征及其指示的古环境意义进行初步研究。结果表明：（1）科任剖面以湿润型元素SiO2、Al2O3、Fe2O3为主，含量范围依次为68.88％～93.77％、9.03％～19.1％和2.14％～5.32％；干旱型元素CaO、Na2O、MgO和K2O的含量均小于0.5％，K2O的含量略高于2％，表现为较强烈淋溶；主元素分布特征、风化特征值、CIA值等均表明，科任剖面老红砂总体上属于轻度富铝化。（2）对特征元素组合、元素比值和磁化率等古气候古环境代用指标进行分析，认为晚更新世中期以来，科任剖面记录了较干冷—暖湿—干冷—暖湿4个阶段的气候变化：55.9～43.9 ka BP和27.0～10.8 ka BP两个时期，气候干冷，冬季风强烈，为风沙堆积的两个主要阶段；43.9～27.0 ka和10.8 ka以来，气候温暖湿润，为风沙经历强烈风化和红化作用阶段。

关键词: 晚更新世, 老红砂, 主元素, 气候变化, 科任剖面

Abstract: This paper focuses on the research of “old red sand” section of Keren in southeast coast of Fujian Province. We analyzed the content of major elements and ratios of oxide in Keren section，and found that：（1）The old red sand was mainly composed of wet-type elments such as SiO2，Al2O3 and Fe2O3，and their content range change as 68.88％～93.77％，9.03％～19.1％，and 2.14％～5.32％，respectively.Dry-type elements such as CaO、Na2O and MgO，whose content are all below 0.5％，only the content of K2O is a bit higher than 2％，showing intensely eluviated.（2）Since the Late Pleistocene，the history of climate change recorded by Keren section can be divided into 4 stages，they are cold-dry，warm-wet，colder-dryer and warm-wet climates.And the major deposition phases of coast eolian sand took place under cold-dry climate during 55.9-43.9 ka BP and 27.0～10.8 ka BP，which had a lower sea level and strong winter monsoon environment.However，during 43.9～27.0 ka BP and since 10.8 ka BP，the climate significantly became warm and humid，also，which had a higher sea level.So，in these phases，the earlier deposition of coast a eolian sand experienced a strong weathering and reddening process.

Key words: Late Pleistocene, old red sand, major elements, climate change, Keren section

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