Utah FORGE and Enel-sponsored Geothermal Music Parody Contest In early 2022, the Utah FORGE team...
Propylitic Alteration
A term borrowed from studies of hydrothermal ore deposits that refers to an assemblage of secondary hydrothermal minerals which forms in igneous rocks. This assemblage is made up of chlorite, illite, feldspar (both Na and K-rich varieties), epidote, calcite and pyrite, imparting a dark green tint to the appearance of altered rocks. It is commonly developed in volcanic-plutonic sequences that host high-temperature geothermal reservoirs.
Geothermal Glossary
Word of the Week – Mineral Geothermometer
Mineral Geothermometer A secondary mineral phase whose stability is defined by a lower and sometimes an upper temperature threshold. Common mineral geothermometers comprise clays, zeolites and epidote, with crystal structures that contain a hydroxyl (OH-) or water...
Word of the Week – Mud Pots and Mud Pools
Mud Pots and Mud Pools Depressions filled with hot bubbling mud commonly associated with steaming ground. The mud is mostly made up of clay minerals which form as an alteration product and interaction between acidic condensed steam and rock-forming minerals.
Word of the Week – MWD
MWD Refers to Measurement While Drilling which for directional drilling includes geospatial information that is used to steer the bottom hole assembly (BHA). Inclination and azimuth are surveyed using accelerometers and magnetometers which are incorporated into MWD...