Fig. 1From: Diagenesis and very low grade metamorphism in a 7,012 m-deep well Hongcan 1, eastern Tibetan plateauTectonic map of China (from Ma et al. 2002). Grey area represents the Qingzang-Dianxi fold region. Filled triangle marks the location of well Hongcan 1. UHP ultrahigh pressure metamorphic belt. Lower part is the geological sketch around the well. Filled triangle marks the locality of the well Hongcan 1Back to article page