Dear Professor D. A. Wark
I would like to ask you, if it were possible to indicate to me what was the methodology used to prepare the samples that were analyzed in the construction of the geothermometer in the work published in: Contrib Mineral Petrol (2006) 152: 743–754
DOI 10.1007 / s00410-006-0132-1
TitaniQ: a titanium-in-quartz geothermometer
David A. Wark Æ E. Bruce Watson.
Thank you in advance
Cordially André Cunha