干旱区生态环境知识资源中心(Arid): 华北平原中部晚上新世以来沉积物碳氧同位素特征及其古环境意义

Arid

	华北平原中部晚上新世以来沉积物碳氧同位素特征及其古环境意义
其他题名	Carbon and Oxygen Isotopic Characteristics of Sediments and Their Paleoenvironmental Significance on the Central North China Plain since Pliocene
	毕志伟 1; 杨振京 2; 赵华 2; 刘海坤 2; 刘林敬 2; 杨庆华 2; 赵红梅 2; 王凡 3
来源期刊	地理与地理信息科学
ISSN	1672-0504
出版年	2012
卷号	28 期号:3 页码:93-95
中文摘要	利用华北平原中部衡水水文地质科研深孔的岩芯,对平原区古土壤钙结核层碳氧同位素组分的古气候环境意义及相关气候指标的定量转换进行探讨,发现碳氧同位素对古气候变化具有较好的响应关系:3.5MaB.P.以来华北平原古气候逐渐由湿润转向干旱,早更新世由多个干湿冷暖旋回组成,晚期气候由暖迅速转凉;中更新世气候略温和,由3个冷干-暖湿旋回组成;晚更新世气候变化趋势为湿润-干燥-湿润,总体上呈现增温趋势。进入全新世后,delta~(13)C平均值(-5)较低,属于相对湿润期;delta~(18) O平均值(-9.5)较低,属于相对寒冷期。应用相关公式可以定量恢复古温度变化,但平原区古土壤层受后期地下水作用的影响较大,如何消除这一影响还需更多数据支持。
英文摘要	By using the core of the hydrogeological research hole in Hengshui on the central North China Plain,this paper discussed the climatic and environmental significance of carbon and oxygen isotope in the calcareous concretion layer and their quantitative conversion among the related climatic indexes.The carbon and oxygen isotopes has better response to ancient climate change had been found:1) For the North China Plain,since 3.5 MaB.P.,the ancient climate gradually changed into arid from humid;in early Pleistocene,there were many cycles of wet-dry and cooling-heating;and in later Pleistocene,the climate rapidly changed into cool from warm;2) In middle Pleistocene,the climate was milder,and there were three cycles of cold-dry and warm-wet;3) Late Pleistocene,the climate change trend was moist-dry-moist,the overall trend appeared rising temperatures.Since the Holocene,the lower average value of delta~(13)C and delta~(18)O reflected a relatively moist-cold period.The paleo-temperature change can be quantitatively recovered by using correlation formula.But it was great that the late groundwater influenced on the paleosoil layer after being soiled and covered at plain area,how to eliminate this influence still requires more data to support.
中文关键词	碳氧同位素 ; 古环境 ; 古土壤层 ; 晚上新世 ; 华北平原
英文关键词	carbon and oxygen isotopes paleoenvironment paleosoil Late Pliocene North China Plain
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:4553237
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227878
作者单位	1.石家庄经济学院, 石家庄, 河北 050031, 中国; 2.中国地质科学院水文地质环境地质研究所, 正定, 河北 050803, 中国; 3.河北地质职工大学, 石家庄, 河北 050081, 中国
推荐引用方式 GB/T 7714	毕志伟,杨振京,赵华,等. 华北平原中部晚上新世以来沉积物碳氧同位素特征及其古环境意义[J],2012,28(3):93-95.
APA	毕志伟.,杨振京.,赵华.,刘海坤.,刘林敬.,...&王凡.(2012).华北平原中部晚上新世以来沉积物碳氧同位素特征及其古环境意义.地理与地理信息科学,28(3),93-95.
MLA	毕志伟,et al."华北平原中部晚上新世以来沉积物碳氧同位素特征及其古环境意义".地理与地理信息科学 28.3(2012):93-95.