Figure 4
From: Thermal evolution of Andean iron oxide–apatite (IOA) deposits as revealed by magnetite thermometry
Thermal evolution of Andean IOA deposits unraveled by magnetite thermometry data. Stages 1 and 2 are characterised by purely magmatic (~ 1000 to 800 °C) and magmatic-hydrothermal (~ 800 to 600 °C) temperature conditions, respectively. Stage 3 comprises purely hydrothermal (< 600 °C) conditions. (a) Reference temperatures of magnetite for igneous rocks (basalt, andesite, dacite), and magmatic/magmatic-hydrothermal (Fe–Ti, V, skarn, porphyry Cu–Mo–Au) ore deposits, and low-temperature (T) hydrothermal magnetite (replacement and disseminated); (b,c) thermal evolution of El Laco (b) and IOA deposits from the Chilean Iron Belt (c). See text for discussion.
