Geochemical Fingerprinting of Rising Deep Endogenous Gases in an Active Hypogenic Karst System

Figure 3

Lithological columns of two key boreholes near Vapour Cave; “Cerro del Castillo” (borehole 1) and “Agua de Dios” (borehole 2), both of them linked to the ancient thermal baths of Alhama de Murcia (southern Spain) (adapted from [17] and other unpublished technical reports provided by the Alhama de Murcia city council). Time evolution of water table and depths of the karstified sections (presence of caves and voids) are displayed in relation to lithologic units. The mineral composition (DRX analysis) of both clasts and matrix of a small core sample of the polygenic conglomerate (host rock of Vapour cave) is also detailed.