Boron isotopic fractionation and trace element incorporation in various species of modern corals in Sanya Bay, South China Sea

ISL OpenIR > 青海盐湖研究所知识仓储

	Boron isotopic fractionation and trace element incorporation in various species of modern corals in Sanya Bay, South China Sea
	Wei, Haizhen 1; Jiang, Shaoyong 1,2; Xiao, Yingkai 3; Hemming, N. Gary 4,5
	2014-06-01
发表期刊	JOURNAL OF EARTH SCIENCE
卷号	25 期号:3 页码:431-444
关键词	Boron Isotope Paleo-ph Proxy Boron Isotopic Fractionation Trace Element Modern Coral
摘要	The boron isotope paleo-pH proxy has been extensively studied due to its potential for understanding past climate change, and further calibrations were considered for accurate applications of the proxy because of significant variability related to biocarbonate microstructure. In this work, we studied the boron isotopic fractionation between modern marine corals and their coexisting seawater collected along shallow area in Sanya Bay, South China Sea. The apparent partition coefficient of boron (K-D) ranged from 0.83x10(-3) to 1.69x10(-3), which are in good agreement with previous studies. As the analyzed coral skeleton (similar to 5 g) spanned the growth time period of 1-2 years, we discussed the boron isotopic fractionation between pristine corals and modern seawater using the annual mean seawater pH of 8.12 in this sea area. Without taking the vital effect into account, (B-11/B-10)(coral) values of all living corals spread over the curves of (B-11/B-10)(borate) vs. (B-11/B-10)(sw) with the alpha (4-3) values ranging from 0.974 to 0.982. After calibrating the biological effect on the calcifying fluid pH, the field-based calcification on calcifying fluid pH (i.e., Delta(pH(biol)-pH(sw))) for coral species of Acropora, Pavona, Pocillopora, Faviidae, and others including Proites are 0.42, 0.33, 0.36, 0.19, respectively, and it is necessary to be validated by coral culturing experiment in the future. Correlations in B/Ca vs. Sr/Ca and B/Ca vs. pH(biol) approve temperature and calcifying fluid pH influence on skeletal B/Ca. Fundamental understanding of the thermodynamic basis of the boron isotopes in marine carbonates and seawater will strengthen the confidence in the use of paleo-pH proxy as a powerful tool to monitor atmospheric CO2 variations in the past.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5705
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing 210093, Jiangsu, Peoples R China 2.China Univ Geosci, Fac Earth Resources, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810003, Peoples R China 4.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA 5.CUNY Queens Coll, Sch Earth & Environm Sci, Flushing, NY 11367 USA
推荐引用方式 GB/T 7714	Wei, Haizhen,Jiang, Shaoyong,Xiao, Yingkai,et al. Boron isotopic fractionation and trace element incorporation in various species of modern corals in Sanya Bay, South China Sea[J]. JOURNAL OF EARTH SCIENCE,2014,25(3):431-444.
APA	Wei, Haizhen,Jiang, Shaoyong,Xiao, Yingkai,&Hemming, N. Gary.(2014).Boron isotopic fractionation and trace element incorporation in various species of modern corals in Sanya Bay, South China Sea.JOURNAL OF EARTH SCIENCE,25(3),431-444.
MLA	Wei, Haizhen,et al."Boron isotopic fractionation and trace element incorporation in various species of modern corals in Sanya Bay, South China Sea".JOURNAL OF EARTH SCIENCE 25.3(2014):431-444.