Comment on ‘Metamorphic P–T–time history of the Sanbagawa belt in central Shikoku, Japan and implications for retrograde metamorphism during exhumation’ by K. Aoki, K. Kitajima, H. Masago, M. Nishizawa, M. Terabayashi, S. Omori, T. Yokoyama, N. Takahata, Y. Sano, S. Maruyama [Lithos 113 (2009) 393–407

Abstract

Article history: Received 17 November 2009 Accepted 24 January 2010 Available online 6 February 2010 zones. New zircon U–Pb age data presented by Aoki et al. (2009) of 85.6± 3.0 Ma are in good agreementwith relatively youngmetamorphism and rapid exhumation. However, Aoki et al. (2009) interpret these ages as recording the timing of retrograde metamorphism significantly later than the peak at around 120 Ma. In this comment, we raise three points concerning the treatment of age data given by Aoki et al. (2009). We