Paleoclimatic interpretation of the past 30 ka from isotopic studies of;the deep confined aquifer of the North China plain

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院地质力学研究所

	Paleoclimatic interpretation of the past 30 ka from isotopic studies of;the deep confined aquifer of the North China plain
	Chen, ZY; Qi, JX; Xu, JM; Xu, JM; Ye, H; Nan, YJ
刊名	APPLIED GEOCHEMISTRY
	2003
卷号	18 期号:7 页码:997-1009
ISSN号	0883-2927
英文摘要	The delta(18)O and deltaD values in the deep confined aquifer beneath the North China Plain which is located at 112degrees30'E-119degrees30'E and 34degrees46'N-40degrees25'N, reflect differences in paleoclimatic conditions between the Holocene and the late Pleistocene. Groundwater samples whose C-14 ages are between 12 and 25 ka B.P. have ranges of -9.4 to -11.7% for delta(18)O and -76% to -85% for deltaD values. These very negative delta(18)O and deltaD values reflect the cold and and climate in the last glacial period. The temperature estimated in this period is 6-9degreesC cooler than that of the present. The entire ranges of delta(18)O and deltaD values for samples with C-14 dating from 7 ka BY to present are -7.7% to -10.2% and -63% to -73%, respectively. The greater delta(18)O and deltaD enrichments of these samples indicate a period of relatively humid and warm climate in the Holocene. However, the wide ranges of delta(18)O (-9.0% to -11.1%) and deltaD (-66% to -80%) values for samples with C-14 age ranging from 12 to 7 ka B.P. imply an unstable climatic condition of rapidly increasing temperature, which marks the transition from the Pleistocene to the Holocene. (C) 2002 Elsevier Science Ltd. All rights reserved.
学科主题	水文地质学
WOS关键词	GROUNDWATER CIRCULATION SYSTEMS ; UNITED-STATES ; C-14 ; O-18 ; PALEORECHARGE ; EVOLUTION ; CLIMATE ; TRENDS ; BASINS ; GASES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000183080900003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37558]
专题	中国地质科学院地质力学研究所
作者单位	Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Zhengding 050803, Hebei, Peoples R China.
推荐引用方式 GB/T 7714	Chen, ZY,Qi, JX,Xu, JM,et al. Paleoclimatic interpretation of the past 30 ka from isotopic studies of;the deep confined aquifer of the North China plain[J]. APPLIED GEOCHEMISTRY,2003,18(7):997-1009.
APA	Chen, ZY,Qi, JX,Xu, JM,Xu, JM,Ye, H,&Nan, YJ.(2003).Paleoclimatic interpretation of the past 30 ka from isotopic studies of;the deep confined aquifer of the North China plain.APPLIED GEOCHEMISTRY,18(7),997-1009.
MLA	Chen, ZY,et al."Paleoclimatic interpretation of the past 30 ka from isotopic studies of;the deep confined aquifer of the North China plain".APPLIED GEOCHEMISTRY 18.7(2003):997-1009.