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Skarn

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A metasomatic rock formed at the contact between a silicate rock (or magmatic melt) and a carbonate rock. It consists mainly of Ca, Mg, Fe and/or Mn silicates which are free from or poor in water.

An old Swedish mining term for silicate gangue (amphibole, pyroxene, garnet, etc.) of certain iron ore and sulfide deposits of Archean age, particularly those that have replaced limestone and dolostone. Its meaning has been generally expanded to include lime-bearing silicates, of any geologic age, derived from nearly pure limestone and dolostone with the introduction of large amounts of Si, Al, Fe, and Mg. In American usage, the term is more or less synonymous with tactite.


See Also: calc-silicate hornfels


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Classification of SkarnHide

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Pronounciation of SkarnHide

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Jolyon & Katya RalphUnited Kingdom

References for SkarnHide

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Burt, D.M. and London, D. (1978) Manganbabingtonite and ilvaite from a hedenbergite-johannsenite skarn, Aravaipa, Arizona. Geol. Soc. Am., Abs. with Prog., 10/3, 98.
Fettes et al. (2007) Metamorphic Rocks - A Classification and Glossary of Terms. Cambridge University Press

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