Sample WIL1A originates from an abandoned feldspar mine (49.8010° N, 12.0439° E), ca. 1.5 km west of Wildenreuth, NE Bavaria, Germany. The sample is a metamorphosed, in parts ductily deformed granitic pegmatite. It originates from the same pegmatite field as sample GER2B. A previous, TIMS-based Rb-Sr age determination for primary, magmatic muscovite and cogenetic feldspar provided a (recalculated) age of 484 +/-5 Ma. 5