What exactly are the rock types that make up the underground laboratory of Utah FORGE? In this webinar, Dr. Clay Jones describes the geology of the site and surrounding area and the findings from core and cutting analyses of deep wells!
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 – BHA
BHA Refers to Bottom Hole Assembly, which is the system of tools at the bottom of the drill string that is used for drilling directional wells. The BHA includes the drill bit, mud motor, drill collar, and any tools that are used for making measurements while...
Word of the Week – Binary Cycle Power Plant
Binary Cycle Power Plant A power plant in which the produced geothermal fluid passes through a heat exchanger and heats a low boiling point liquid, commonly an organic compound such as pentane, to vaporize and condense as it passes through a turbine and generate...
Word of the Week – Breccia
Breccia Angular to sub-angular fragments of broken rock that are cemented together that are highly permeable and form on the surface due to sedimentary or igneous processes or in fault zones.