Stable Isotopes

Stable Isotopes

Refers to non-radioactive isotopes of elements, including those of oxygen, hydrogen, carbon, sulfur, and nitrogen. In geothermal geochemistry, the stable isotope ratios of oxygen (18O/16O) and hydrogen (2H/1H) in thermal waters are used to trace its origin (e.g., meteoric, magmatic).

Geothermal Glossary

Word of the Week – Shear Fracture

Word of the Week – Shear Fracture

Shear Fracture A pre-existing joint or fracture that accommodates shear displacement due to frictional slippage, wherein the rough surfaces on the fracture surface create permeability due to self propping.

Word of the Week – Silica Sinter

Word of the Week – Silica Sinter

Silica Sinter Horizontally banded deposit of amorphous silica that precipitates around neutral pH hot springs that are close to boiling temperature.

Word of the Week – Slickwater

Word of the Week – Slickwater

Slickwater Water that is injected during reservoir stimulation. It is modified with low concentrations of chemical additives, including polyacrylamide, that reduce friction and enhance fluid flow. Proppant (e.g., sand) is often added to help keep stimulated fractures...

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