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中国沙漠 ›› 2011, Vol. 31 ›› Issue (3): 678-682.

• 古气候与环境变化 • 上一篇    下一篇

陕西蓝田全新世黄土AMS-14C测年与环境变迁

张 婷1,2,3, 祝一志1, 杨亚长4, 邵 晶4   

  1. 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 710061; 3.中国科学院 研究生院, 北京 100049; 4.陕西省考古研究院, 陕西 西安 710054
  • 收稿日期:2010-10-04 修回日期:2011-01-10 出版日期:2011-05-20 发布日期:2011-05-20

AMS-14C Dating of the Holocene Loess Sequence at Lantian, Shaanxi and Reflected Environmental Change

ZHANG Ting1,2,3, ZHU Yi-zhi1, YANG Ya-chang4, SHAO Jing4   

  1. 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xian 710075, China; 2.Xian Accelerator Mass Spectrometry Center, Xian 710061, China; 3.Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 4.Shaanxi Provincial Institute of Archaeology, Xian 710054, China
  • Received:2010-10-04 Revised:2011-01-10 Online:2011-05-20 Published:2011-05-20

摘要: 加速器质谱计14C(AMS-14C)测年技术具有精度高、速度快以及样品需求量少的特点,已广泛用于晚第四纪和新石器时期的断代研究。通过对蓝田县新街遗址旁的全新世黄土-古土壤序列进行AMS-14C测年,并利用贝叶斯分析方法,建立了该地层序列的年代学框架。结合新街遗址考察、黄土-古土壤地层划分、磁化率测量和孢粉分析,表明马兰黄土晚期气候偏凉干,进入全新世时期气候转暖,仰韶时期温暖湿润,龙山时期气候暖偏干,新黄土堆积时期气候转干冷。

关键词: AMS-14C年代学, 贝叶斯分析, 全新世黄土地层, 环境变迁

Abstract: AMS-14C dating provides a new way in archaeology studies because of its high precision and speed and applicability in micro-sample dating. It is widely used in late Quaternary and Neolithic archaeological research. Based on AMS-14C dating of loess-paleosol sequence of the Xinjie profile at Lantian County of Shaanxi Province, the archaeological chronology of this sequence was obtained by using Bayesian method. Combining the stratigraphic sequence, magnetic susceptibility and pollen analysis, we got the conclusion that the weather was dry and cold during Malan loess period, and warm in Holocene, humid and warm in Yangshao period, dry and warm in Longshan period, dry and cold in recent Loess forming period.

Key words: AMS-14C chronology, Bayesian analysis, Holocene loess sequence, environmental change

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