摘要
采用简单的热解方法分离黄土-古土壤不同有机组分进行14C测年的探索,通过加热使黄土-古土壤有机质发生裂解,选择400℃作为试验温度,对陕西省岐山县礼村剖面黄土-古土壤粉末样品在400℃下挥发出的Py-V组分和残留下的Py-R组分分别进行14C(AMS)测年,并结合该剖面同层位黄土地层与考古文化层接触关系,认为礼村剖面受人类活动影响强烈的地层中,Py-V组分年龄能代表真实年龄;在未受人类活动影响自然沉积地层中,Py-R组分年龄能代表真实年龄。
The onerous chemical extractions for soil organic matter(SOM) fractions do not always produce satisfactory 14C dates.In an effort to develop an alternative method,the pyrolysis-combustion technique was investigated to partition SOM into pyrolysis volative(Py-V) and pyrolysis residue(Py-R) at 400 ℃,and dated the two component parts separately by Accelerate Mass Spectrometry(AMS).Compared with the environmental archaeology sequence at the Licun Holocene profile,the Py-V fractions yielded 14C data more reasona...
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2009年第1期73-78,共6页
Marine Geology & Quaternary Geology
基金
国家自然科学基金项目(40773079606)
黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG0617,SKLLQG07010)
