Fig. 5
Depth-temperature diagrams with isochores representing the higher and the lower calculated molar volumes for vapour-rich fluid inclusions and the meam isochores in samples F72 (a) and F92 (b) from the Yret zone. The dashed lines represent the range of geothermal gradients from 25 and 35 °C/km as deduced from the K-white mica b cell dimensions. The thick curve represents the liquid–gas reaction curve of water. CP critical point of water