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Copyright © 2013 by The Geochemical Society of Japan. and ore-forming fluid was extracted from fluid inclusions hosted in quartz crystals. Isotopic data for Li and Sr, in addition to the heavy metal content of the ore-forming fluid, were determined in order to elucidate the origin and temporal changes of the fluid. To our knowledge, this is the first such study that has been applied to hydrothermal tungsten deposits. There have been several pioneering studies to determine the isotopic composition of ore-forming fluid trapped as fluid inclusions. Banks et al. (2000) measured Cl isotopes in fluid inclusions and discussed the magmatic nature of the ore-forming fluid. Analysis of hydrogen isotopes from vein quartz in epithermal gold deposits at the Hishikari mine suggested a meteoric origin for the fluid (Imai et al., 1998). On the basis of Rb/Sr isochrons, geochronological research was carried out for fluid inclusions (Shepherd and Darbyshire, 1981). Teng et al. (2006) measured δ7Li for fluid inclusions in pegmatite quartz crystals. Although all of these studies demonstrated that isotopic analysis of fluid inclusions is convincing method to apply to hydrothermal ore deposits, a consistent methodology has not yet been fully established. Because the amount of inclusion fluid that is extracted is very small, problems related to contamination are a concern. In the present study, we examined the Lithium–strontium isotope and heavy metal content of fluid inclusions and origin of ore-forming fluid responsible for tungsten mineralization at Takatori mine, Japan

geochemical journal/geochemical journal

Lithium-strontium isotope and heavy metal content of fluid inclusions and origin of ore-forming fluid responsible for tungsten mineralization at Takatori mine, Japan