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European Journal of Mineralogy; January, February 2005; v. 17; no. 1; p. 93-102; DOI: 10.1127/0935-1221/2005/0017-0093
© 2005 E. Schweizerbart'sche Verlagsbuchhandlung Science Publishers
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Articles

LA-ICP-MS micro-analysis of fluid inclusions in quartz using a commercial Merchantek 266 nm Nd:YAG laser

: a pilot study Torsten GRAUPNER*, Helene BRÄTZ and Reiner KLEMD

Institute of Mineralogy, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

* Corresponding author, e-mail: torsten.graupner{at}mail.uni-wuerzburg.de

The results of this pilot study show that using a commercial Merchantek 266 nm Nd:YAG laser system, laser ablation -inductively coupled plasma - mass spectrometric analysis of fluid inclusions in quartz is possible. Fifteen elements (Li, Na, K, Mg, Fe, As, Rb, Sr, Sn, Ba, Mo, U, W, Mn, and Pb) were determined for aqueous fluid inclusions from the Zinnwald Sn deposit (Ore Mountains, Germany). The concentrations of the measured major and trace elements are in good agreement with literature data for the same location. A first evaluation of the data shows that the high temperature inclusions (Th: 400 - 370 °C) contain high Fe and Na concentrations as well as Sn contents typical of tin-bearing fluids. A decrease in salinity from the high temperature fluid inclusions to low temperature secondary inclusions probably reflects a dilution trend of the magmatic fluid by external fluids.

Key-words: LA-ICP-MS, fluid inclusions, quartz, tin deposits, Zinnwald.






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