Lähdehiili

Lähdehiili is a Finnish term that translates to "source coal" or "originating coal." It is not a specific type of coal but rather a descriptive term used to indicate the geological origin or formation context of coal. In geological studies and discussions about coal resources, "lähdehiili" can refer to coal that is still in its original deposit or has not been significantly moved from its place of formation. This distinguishes it from coal that has been transported by natural processes, such as erosion and deposition, or through mining and subsequent processing.

The concept of lähdehiili is important in understanding coal seam continuity, the quality and characteristics of coal deposits, and the geological history of the area where the coal formed. When discussing mining operations, understanding the lähdehiili helps in predicting the extent and accessibility of the coal reserves. It emphasizes the undisturbed nature of the coal bed.

In practice, the term might be used in contrasting different coal samples or deposits. For instance, a comparison might be made between a sample of lähdehiili, which represents the pristine coal in its original strata, and coal that has been subjected to various geological or anthropogenic alterations. The term helps to focus on the primary, unaltered state of coal as it exists within its formation environment.