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Article: Sr thermometer for porites corals: little need to measure Ca?

TitleSr thermometer for porites corals: little need to measure Ca?
Authors
Issue Date1999
PublisherBusiness Center for Academic Societies Japan.
Citation
Geochemical Journal, 1999, v. 33 n. 5, p. 351-354 How to Cite?
AbstractCubic sub-samples of 1 mm3 (about 0.5 mg) were obtained from a Porites coral slice collected from Xisha Island, South China Sea, and analysed for Sr and Ca concentrations by ID-TIMS after precise weighing. Ca contents in the coral are quite uniform (mean = 38.16 wt%, 2σ = 0.11 wt%). The variation corresponds to ±0.4°C, about the level of uncertainty of the Sr/Ca-SST calibration. Sr concentrations and Sr/CA ratios covary linearly, and the line can be defined by the equation Sr/Ca x 103 = 0.111 Sr - 0.5061 (correlation coefficient r = 0.9955), where Sr is in μ mol/gm. Consequently, our results demonstrate that the previously established coral Sr/Ca thermometer, Sr/Ca x 103 = A + B x T, can be simplified as a Sr thermometer, 0.111Sr - 0.5061 = A + B x T, where Sr is in μ mol/gm. Therefore, measurement of Ca in corals could be unnecessary. If different levels of impurity exist in different corals, a few Ca measurements in each coral may be needed, but definitely there is no need to measure every sub-sample.
Persistent Identifierhttp://hdl.handle.net/10722/151021
ISSN
2015 Impact Factor: 0.621
2015 SCImago Journal Rankings: 0.837
References

 

DC FieldValueLanguage
dc.contributor.authorSun, Men_US
dc.contributor.authorChiu, CHen_US
dc.contributor.authorShen, CCen_US
dc.contributor.authorLee, Ten_US
dc.date.accessioned2012-06-26T06:16:02Z-
dc.date.available2012-06-26T06:16:02Z-
dc.date.issued1999en_US
dc.identifier.citationGeochemical Journal, 1999, v. 33 n. 5, p. 351-354en_US
dc.identifier.issn0016-7002en_US
dc.identifier.urihttp://hdl.handle.net/10722/151021-
dc.description.abstractCubic sub-samples of 1 mm3 (about 0.5 mg) were obtained from a Porites coral slice collected from Xisha Island, South China Sea, and analysed for Sr and Ca concentrations by ID-TIMS after precise weighing. Ca contents in the coral are quite uniform (mean = 38.16 wt%, 2σ = 0.11 wt%). The variation corresponds to ±0.4°C, about the level of uncertainty of the Sr/Ca-SST calibration. Sr concentrations and Sr/CA ratios covary linearly, and the line can be defined by the equation Sr/Ca x 103 = 0.111 Sr - 0.5061 (correlation coefficient r = 0.9955), where Sr is in μ mol/gm. Consequently, our results demonstrate that the previously established coral Sr/Ca thermometer, Sr/Ca x 103 = A + B x T, can be simplified as a Sr thermometer, 0.111Sr - 0.5061 = A + B x T, where Sr is in μ mol/gm. Therefore, measurement of Ca in corals could be unnecessary. If different levels of impurity exist in different corals, a few Ca measurements in each coral may be needed, but definitely there is no need to measure every sub-sample.en_US
dc.languageengen_US
dc.publisherBusiness Center for Academic Societies Japan.-
dc.relation.ispartofGeochemical Journalen_US
dc.titleSr thermometer for porites corals: little need to measure Ca?en_US
dc.typeArticleen_US
dc.identifier.emailSun, M: minsun@hku.hken_US
dc.identifier.authoritySun, M=rp00780en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0033378392en_US
dc.identifier.hkuros55683-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033378392&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume33en_US
dc.identifier.issue5en_US
dc.identifier.spage351en_US
dc.identifier.epage354en_US
dc.publisher.placeJapanen_US
dc.identifier.scopusauthoridSun, M=25932315800en_US
dc.identifier.scopusauthoridChiu, CH=7402303604en_US
dc.identifier.scopusauthoridShen, CC=7402860059en_US
dc.identifier.scopusauthoridLee, T=25925084700en_US

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