Reaction rim | Article about reaction rim by The Free Dictionary
reaction rim[rē′ak·shən ‚rim]
A surficial rim around one mineral produced by the reaction of the core mineral with the surrounding magma. Also known as reaction border.
References in periodicals archive
Grains with preserved reaction rims
have not been transported any great distance.
Observations of reaction rims
and shagreen texture indicate the kimberlite minerals are derived from a local and potentially diamond-bearing kimberlite source(s).
A large population of the kimberlite mineral grains contained preserved reaction rims
demonstrating that down ice movement of the grains from source material was limited.
The morphology of grains, commonly preserved reaction rims
and proximity to deep seated structures, all point to a local source.