kidealue
Kidealue is a term used in mineralogy and geology to describe a geologic zone characterized by an elevated abundance of crystalline mineral phases. The term is derived from the Finnish words kide, meaning crystal, and alue, meaning area or region, reflecting its origins in Finnish geological literature. In formal usage, a kidealue refers to a portion of a rock body where crystal growth has been relatively unimpeded, resulting in well-formed crystals and a coarse-grained texture. The concept is regional and not standardized across all geological traditions, and its precise definition can vary between laboratories.
A kidealue is not a distinct lithologic unit but rather a zoning feature within igneous or metamorphic
Formation and characteristics: Factors that create a kidealue include steady heat flow, diffusion-controlled crystallization, and low
Importance: Recognizing a kidealue helps petrologists interpret a rock’s thermal history and crystallization environment. It can