The role of the fluid composition in the formation of hydrothermal Sn W ores : insights from in situ analyses of fluid inclusions by UV fs LA ICP MS Femtosecond laser ablation fluid inclusions quartz trace elements hydrothermal tin tungsten deposits metal mobility Ti in quartz geothermobarometry. Femtosekunden Laser Ablation Flüssigkeitseinschlüsse Quarz Spurenelemente hydrothermale Zinn Wolfram Lagerstätten Mobilität von Metallen Ti in Quarz Geothermobarometrie