The titanium-in-quartz (TitaniQ) thermobarometer: A critical examination and re-calibration

Rapid generation of reaction permeability in the roots of black smoker systems, Troodos ophiolite, Cyprus

“…Electron probe traverses (Connell 2000) across zoned quartz shows that Al and Ti are enriched in the brighter zones (up to 1000 and 700 ppm, respectively) dropping to close to the detection limit in darker zones and late veins, while Fe is enriched from 1000 to 5000 ppm from the core to the margins of the crystals. Application of the Ti-in-quartz geothermometer (Wark & Watson 2006) gives meaningless temperatures which can exceed 1000°C, probably reflecting fast disequilibrium quartz precipitation (Huang & Audetat 2012). The associated epidote in areas close to voids is also zoned, as can be seen in the BSE images (Fig.…”

Localisation of ductile and brittle shear zones along the Szentlőrinc-1 well in the Mecsekalja Zone using quartz microstructural and well-log data

“…Thus, to know which of these schemes is true in the case of our study area, information about the metamorphic evolution of the footwall and hanging wall formations is essential. This information can be determined using the chemical compositions of the available quartz grains based on the ''Ti-in-quartz'' thermometer (Wark and Watson 2006;Thomas et al 2010;Huang and Audétat 2012;Kidder et al 2013;Haertel et al 2013). If the metamorphic grades of the footwall and hanging wall formations are nearequivalent, then the coincidence of the brittle and ductile shear zones could be caused by primarily evolved softened regions.…”

OH defects in quartz in granitic systems doped with spodumene, tourmaline and/or apatite: experimental investigations at 5–20 kbar

“…Quartz may contain different amounts of impurities such as H, Li, B, Na, Al, P, K, Ti, Fe, and Ge depending on the formation conditions at different geological environments (e.g., different temperatures, pressures and chemical environments). Some of these trace elements (i.e., Al and Ti) have been successfully applied as geothermometers (Dennen et al 1970;Wark and Watson 2006;Thomas et al 2010;Huang and Audétat 2012).…”