B. Schafer et al., Determination of trace-element partitioning between fluid and melt using LA-ICP-MS analysis of synthetic fluid inclusions in glass, EUR J MINER, 11(3), 1999, pp. 415-426
The partitioning of trace elements between an aqueous chloride fluid phase
and a granitic melt was investigated using LA-ICP-MS analysis of synthetic
fluid inclusions in glass. In these experiments; a granitic melt was equili
brated with included vesicles containing the chloride solution at 850 degre
es C and 2 kbar. Rapid isobaric quenching of the system preserves the host
phase as an unfractured granitic glass which contains typically more than a
hundred individual two-phase fluid inclusions. Glass matrix and fluid incl
usions were analysed by LA-ICP-MS for Na, K, Al, Cl, Nb, Cs, Mo, and W. For
quantification the integrated fluid inclusion intensities were corrected f
or the contribution of the doped host glass to the inclusion signal using i
ntegrated intensities for the highly compatible elements Si and Al. Quantit
ative data for the fluid inclusions were calculated using Cl as internal st
andard element. The reproducibility of inclusion analyses for Na, K, Cs, Mo
, and W ranges between 3 and 25 % relative.
Analyses of fluid inclusions and the host glass permit the calculation of p
artition coefficients for Na, K, Cs, Mo, and W. The resultant partition coe
fficient data were compared with the results of partitioning experiments us
ing classical bulk analytical techniques.