Carbon isotope fractionation during low temperature carbonization of foxtail and common millets

IVPP-IR > 中科院古脊椎所（2000年以后）

	Carbon isotope fractionation during low temperature carbonization of foxtail and common millets
	Yang, Qing 2,3; Li, Xiaoqiang 1; Liu, Weiguo 2; Zhou, Xinying 1; Zhao, Keliang 1; Sun, Nan 1; [email protected]
	2011-08-01
发表期刊	ORGANIC GEOCHEMISTRY
ISSN	0146-6380
卷号	42 期号:7 页码:713-719
文章类型	Article
摘要	Stable carbon isotopes of organic matter and fossilized plant remains can be used to effectively reconstruct local palaeoclimate changes, especially from plants using a single photosynthetic mode. The charred grains of foxtail and common millet are chemically stable in the environment and have been preserved widely and continuously throughout the Holocene in North China. The charred remains of these species are ideal materials for reconstructing the palaeoclimate based on delta(13)C of foxtail and common millets heated to temperatures up to around 250 degrees C. This study reports delta(13)C values of modern millets carbonized at different temperatures. The results indicate that there are no significant changes in delta(13)C of intact and charred samples of foxtail millet (<= 0.46 parts per thousand) and common millet (<= 0.49 parts per thousand) for temperatures below 300 degrees C. The delta(13)C of charred foxtail millet formed at 250 degrees C were 0.2 parts per thousand higher in delta(13)C than the source samples. In contrast, the delta(13)C of charred common millet formed at 250 degrees C were 0.2 parts per thousand lighter in delta(13)C than the source samples. The delta(13)C values of grains were determined in part by the carbon content (i.e., starches, lignins and lipids) and the variable thermal tolerances of these compounds to heating. However, the observed (13)C carbonization associated with fractionation of only 0.2 parts per thousand in grains is much less than the natural variation typically found in wood. We therefore suggest that delta(13)C measured in carbonized grains can serve as an effective indicator for paleoenvironmental and archaeological reconstructions. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
关键词	Fossil Charcoal Mediterranean Basin Plant Cellulose Atmospheric Co2 Discrimination C-4 Leaves C-13 Delta-c-13 Grasses
WOS标题词	Science & Technology ; Physical Sciences
URL	查看原文
关键词[WOS]	FOSSIL CHARCOAL ; MEDITERRANEAN BASIN ; PLANT CELLULOSE ; ATMOSPHERIC CO2 ; DISCRIMINATION ; C-4 ; LEAVES ; C-13 ; DELTA-C-13 ; GRASSES
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000294359500002
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4399
专题	中科院古脊椎所（2000年以后）
通讯作者	[email protected]
作者单位	1.Chinese Acad Sci, Lab Human Evolut, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Qing,Li, Xiaoqiang,Liu, Weiguo,et al. Carbon isotope fractionation during low temperature carbonization of foxtail and common millets[J]. ORGANIC GEOCHEMISTRY,2011,42(7):713-719.
APA	Yang, Qing.,Li, Xiaoqiang.,Liu, Weiguo.,Zhou, Xinying.,Zhao, Keliang.,[email protected].(2011).Carbon isotope fractionation during low temperature carbonization of foxtail and common millets.ORGANIC GEOCHEMISTRY,42(7),713-719.
MLA	Yang, Qing,et al."Carbon isotope fractionation during low temperature carbonization of foxtail and common millets".ORGANIC GEOCHEMISTRY 42.7(2011):713-719.

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