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地理科学 >

2011 , Vol. 31 >Issue 4: 508 - 512

DOI: https://doi.org/10.13249/j.cnki.sgs.2011.04.508

论文

西峰蔡家咀黄土剖面记录的末次盛冰期到全新世最佳期气候变化

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  • 1. 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;
    2. 西安加速器质谱中心, 陕西 西安 710052;
    3. 中国科学院研究生院, 北京 100049

收稿日期: 2010-05-11

  修回日期: 2010-08-05

  网络出版日期: 2011-04-20

基金资助

中国科学院知识创新重要方向项目(KZCX2-YW-118)资助。

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Climatic Change from LGM to Holocene Optimum Recorded by Loess Sequence from Xifeng in Central Loess Plateau

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  • 1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, Shaanxi 710075, China;
    2. Xi’an Accelerator Mass Spectrometry Center, Xi’an, Shaanxi 710075, China;
    3. Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China

Received date: 2010-05-11

  Revised date: 2010-08-05

  Online published: 2011-04-20

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摘要

采用挖探井方式获取西峰蔡家咀剖面200 cm黄土沉积序列,以7个14C-AMS测年数据为年龄控制点,利用沉积物粒度模式建立最近20 ka的年代框架。磁化率、灰度、粒度等指标的综合对比表明该剖面记录了末次盛冰期增温以来几次重要气候事件,如Heinrich事件1(H1)、Bølling-Allerød暖期(B-A)、新仙女木事件(YD)、8.2 ka事件等,说明西峰黄土剖面具有记录短尺度气候突变事件的潜力。

本文引用格式

刘策, 宋少华, 孔祥辉, 刘钊, 鲜锋, 武振坤 . 西峰蔡家咀黄土剖面记录的末次盛冰期到全新世最佳期气候变化[J]. 地理科学, 2011 , 31(4) : 508 -512 . DOI: 10.13249/j.cnki.sgs.2011.04.508

Abstract

A 200-cm long successive loess core was firstly obtainded by diging a well at Caijiazui section in the Xifeng located in central loess Plateau in China. According to 14C-AMS dating results and the grain size model, the reliable chronologic framework of Xifeng section over the past 20 ka was derived in turn. Multi-proxy analysis on the magnetic susceptibility, grey scale and grain size clearly reveal the typical climatic episodes such as Heinrich 1 (H1), Bølling-Allerød (B-A), Younger Dryas (YD), and 8.2 ka event. It suggests the potential ability of Xifeng loess section for recording the abrupt climatic variations on the small scale.

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