Carbon and oxygen isotope records and paleoclimate reconstruction;(140-250 ka BP) from a stalagmite of Shuinan Cave, Guilin, China

doi:10.1007/s00254-005-0120-1

	Carbon and oxygen isotope records and paleoclimate reconstruction;(140-250 ka BP) from a stalagmite of Shuinan Cave, Guilin, China
	Zhang, ML 3; Cheng, H ; Yuan, DX ; Zhu, XY ; Lin, YS ; Qin, JM ; Edwards, R
刊名	ENVIRONMENTAL GEOLOGY
	2006
卷号	49 期号:5 页码:752-764
关键词	stalagmite TIMS-U series ages isotope records palaeo-climate reconstruction Shuinan Cave Guilin China
ISSN号	0943-0105
DOI	10.1007/s00254-005-0120-1
英文摘要	The time sequence of paleoclimatic changes from 245.2 to 147.9 ka B.P. has been established by high precision U-series dating by Thermal Ionization Mass Spectrometry and the analysis of the oxygen isotopes from a stalagmite of Shuinan Cave in Guilin. The oxygen isotope pattern is divided into three main intervals. The top part of the stalagmite (interval C) displays mainly relatively heavy oxygen isotopes, mostly -7 to -5 parts per thousand(VPDB), but at a depth of 86.5 cm below the top, there is a sharp change to values lighter than -8 parts per thousand. This boundary, dated at 192.6 +/- 3.9 ka B.P. is correlated with the boundary between marine oxygen isotope stages 6 and 7. The underlying interval B has delta O-18 values consistently between -7.5 and -8.5 parts per thousand until 271 cm depth when there is a sharp rise in delta O-18 values towards values as heavy as -5 parts per thousand. The upper position of this change is dated at 242.5 +/- 6.4 ka B.P. and is correlated with the boundary between marine isotope stages 7 and 8. Carbon isotope values lie between -8.5 and -11 parts per thousand and are not uniquely high or low in the three intervals, but also show rapid changes at the boundaries between intervals in the same sense as the shifts in delta O-18. The pronounced shifts in delta O-18 are attributed to changes in the paleo-monsoon intensity which reflect major reorganizations of the climate system, but some regional characteristics are also present. The results are also consistent with previous studies of climate proxies from loess-palaesol sequences in northern China. These characteristics show that paleo-climate evolution since the late stage of the middle Pleistocene Epoch in the Guilin area not only follows the global characteristics, but also has the strong district or regional patterns.
学科主题	第四纪地质
WOS关键词	CLIMATE ; SEA
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000235487900010
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38113]
专题	中国地质科学院
作者单位	1.Chinese Acad Geol Sci, Karst Dynam Lab, Inst Karst Geol, Guilin 541004, Peoples R China. 2.Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455 USA. 3.中国地质调查局岩溶地质研究所
推荐引用方式 GB/T 7714	Zhang, ML,Cheng, H,Yuan, DX,et al. Carbon and oxygen isotope records and paleoclimate reconstruction;(140-250 ka BP) from a stalagmite of Shuinan Cave, Guilin, China[J]. ENVIRONMENTAL GEOLOGY,2006,49(5):752-764.
APA	Zhang, ML.,Cheng, H.,Yuan, DX.,Zhu, XY.,Lin, YS.,...&Edwards, R.(2006).Carbon and oxygen isotope records and paleoclimate reconstruction;(140-250 ka BP) from a stalagmite of Shuinan Cave, Guilin, China.ENVIRONMENTAL GEOLOGY,49(5),752-764.
MLA	Zhang, ML,et al."Carbon and oxygen isotope records and paleoclimate reconstruction;(140-250 ka BP) from a stalagmite of Shuinan Cave, Guilin, China".ENVIRONMENTAL GEOLOGY 49.5(2006):752-764.