Ratios of element count rates used for quantification of LA-ICP-MS analysis of fluid inclusions inside minerals change between shallow inclusions, ablated at crater depth to diameter aspect ratios <3 and deep inclusions, with aspect ratios >4, by up to a factor of 2.5. The Cl/Na and the Pb/Na ratios were found to be affected the most. Ablating a scapolite sample with homogeneous Na, Pb and Cl concentrations showed a similar pattern but of smaller magnitude. Such strong fractionation behaviour of chlorine has not been reported to date for LA-ICP-MS analysis. This aspect ratio dependent elemental fractionation is likely due to condensation-deposition and remobilisation effects within the laser ablation crater and may account for some of the scatter obtained when analysing a homogeneous assemblage of fluid inclusions located at variable depths below the surface. © 2012 The Royal Society of Chemistry.

Item Type:	Refereed Article
Research Division:	Earth Sciences
Research Group:	Geochemistry
Research Field:	Exploration geochemistry
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in the earth sciences
UTAS Author:	Guillong, M (Dr Marcel Guillong)
ID Code:	81442
Year Published:	2012
Funding Support:	Australian Research Council (CE0561595)
Web of Science® Times Cited:	13
Deposited By:	Centre for Ore Deposit Research - CODES CoE
Deposited On:	2012-12-06
Last Modified:	2016-12-19
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