Reevaluating Hendy Test with Modern Cave Calcite from the Monsoon Region of China

doi:10.3390/min14080747

IVPP-IR

	Reevaluating Hendy Test with Modern Cave Calcite from the Monsoon Region of China
	Tian, Lijun 1,2; Tao, Tao 1,3; Duan, Wuhui 1; Ruan, Jiaoyang 4; Hu, Chaoyong 5; Li, Yunxia 6; Li, Xianglei 7; Cheng, Hai 8; Tan, Ming 1
	2024-08-01
发表期刊	MINERALS
卷号	14 期号:8 页码:13
通讯作者	Tian, Lijun(ljtian@sjziam.ac.cn) ; Tan, Ming(tanming@mail.iggcas.ac.cn)
摘要	The Hendy Test is widely used for assessing whether isotopic equilibrium was reached in speleothems by examining the delta 18O and delta 13C correlation along a single growth layer. However, stalagmite micro-layers are typically only a few micrometers thick and taper off from the center towards the sides, making it challenging to sample within the same growth layer in practice. To address this, we selected three caves in the monsoon region of China (Shihua Cave in the north, Heshang Cave in the central, and Baojinggong Cave in the south) to verify whether the modern cave calcite has reached equilibrium fractionation with drip water. We examined the spatial variations in the delta 18O and delta 13C values of farmed calcite on glass plates, which are analogous to a single growth layer. The delta 18O and delta 13C correlations of farmed calcite from different cave sites are consistently strong, suggesting that kinetic fractionation effects are prevalent, especially at the drip sites with lower drip rates due to longer CO2 degassing. The delta 18O-delta 13C covariations can also occur along speleothem growth axes on short time scales, while isotopic variations over longer time scales are still in response to climate change. We propose that the Hendy Test criteria might not be prerequisites to isotopic equilibrium, and a Replication Test provides a more reliable indication of the integrity of isotopic proxies in paleoclimate research.
关键词	Hendy Test Chinese stalagmites cave monitoring modern calcite precipitation oxygen and carbon isotopes isotopic fractionation
DOI	10.3390/min14080747
关键词[WOS]	ASIAN MONSOON ; HESHANG CAVE ; DRIP WATERS ; OXYGEN ; SPELEOTHEMS ; STALAGMITE ; CARBON ; PRECIPITATION ; EQUILIBRIUM ; DELTA-O-18
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China ; [42106228] ; [42371164]
项目资助者	National Natural Science Foundation of China
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:001305543800001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23929
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Tian, Lijun; Tan, Ming
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Shijiazhuang 050021, Peoples R China 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 4.Pusan Natl Univ, Inst Basic Sci, Ctr Climate Phys, Busan 46241, South Korea 5.China Univ Geosci, Sch Geog & Informat Engn, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 6.Hunan Normal Univ, Sch Geog Sci, Hunan Prov Key Lab Ecoenvironm Changes & Carbon Se, Changsha 410081, Peoples R China 7.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 8.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 712000, Peoples R China
推荐引用方式 GB/T 7714	Tian, Lijun,Tao, Tao,Duan, Wuhui,et al. Reevaluating Hendy Test with Modern Cave Calcite from the Monsoon Region of China[J]. MINERALS,2024,14(8):13.
APA	Tian, Lijun.,Tao, Tao.,Duan, Wuhui.,Ruan, Jiaoyang.,Hu, Chaoyong.,...&Tan, Ming.(2024).Reevaluating Hendy Test with Modern Cave Calcite from the Monsoon Region of China.MINERALS,14(8),13.
MLA	Tian, Lijun,et al."Reevaluating Hendy Test with Modern Cave Calcite from the Monsoon Region of China".MINERALS 14.8(2024):13.