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Isotopic microanalysis of seawater strontium in biogenic calcite to assess subsequent rehomogenisation during metamorphism

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/31509

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Title: Isotopic microanalysis of seawater strontium in biogenic calcite to assess subsequent rehomogenisation during metamorphism
Related: Chemical geology, Vol. 220, Issue 1-2, p.67-82
DOI: 10.1016/j.chemgeo.2005.03.007
Publisher: Elsevier Science
Date: 2005
Author/Creator: Adams, C. J
Author/Creator: Campbell, H. J
Author/Creator: Griffin, W. L
Description: Precise LAM-MC-ICPMS in situ microanalyses of ⁸⁷Sr/⁸⁶Sr ratios in biogenic calcite of the bivalve ‘Atomodesma’ are reported for 14 horizons in low-grade metasediments of late Early Permian to late Late Permian age in South Island, New Zealand. ‘Atomodesma’ shells (and associated skeletal echinoderm calcite) in zeolite and possibly to lower prehnite-pumpellyite mineral facies material yield isotopic data that are interpreted as primary seawater ⁸⁷Sr/⁸⁶Sr values. Data for higher metamorphic grade (probable upper prehnite-pumpellyite to lawsonite-albite facies) samples consistently show evidence of Sr isotopic homogenisation between ‘Atomodesma’ calcite and host matrix and thus seawater ⁸⁷Sr/⁸⁶Sr values are not retained in shell debris under any circumstances.
Description: 16 page(s)
Subject Keyword: ICPMS mass spectrometry
Subject Keyword: strontium analysis
Subject Keyword: ⁸⁷Sr/⁸⁶Sr ratios
Subject Keyword: biogenic carbonates
Subject Keyword: Permian
Subject Keyword: Atomodesma
Resource Type: journal article
Organisation: Macquarie University. National Key Centre for Geochemical Evolution and Metallogeny of Continents (GEMOC)

Identifier: http://hdl.handle.net/1959.14/31509
Identifier: ISSN:0009-2541
Identifier: mq-rm-2005002228
Language: eng
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