Application of rutile thermometry to eclogites |
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Authors: | T Zack G L Luvizottow |
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Institution: | Mineralogisches Institut, Universit?t Heidelberg, Heidelberg, Germany
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Abstract: | Summary Metamorphic temperatures can be derived from the Zr content in rutiles coexisting with quartz and zircon. To evaluate how
well this recently calibrated rutile thermometer can be applied to eclogites, we analysed 8 samples that cover the whole temperature
range of naturally-occurring eclogites (400–900 °C). Due to low concentrations expected at only 400 °C, very high precision
(better than 5 percent on a 10 ppm level) secondary ion mass spectrometry (SIMS) is used in this study. In general, temperatures
calculated from rutiles agree favourably with literature data as well as with our own estimates, based on several geothermobarometers
and phase assemblages. However, the most important result of this study is the observation that temperatures calculated from
4–8 rutiles within a single sample always agree to within better than 25 °C, hence enforcing the claim that rutile thermometry
is a powerful tool for relative temperature determinations.
An erratum to this article is available at . |
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