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Metasomatic
& Contact Metamorphic Rocks
These rocks form
when magmas and magmatic fluids raise the local temperatures and introduce
a wide variety of new chemicals which interact with those already there.
The main types
are:
| Hornfels
- High temperature reaction product between magmas and silicate rocks -
especially shales and rocks derived from them. |
| Calciphyre
(Calc-Silicates) - Recrystalized carbonates and silicates with calcium
rich minerals especially Wollastonite, Plagioclase, Diopside and Garnet
as the main silicates. Forms at medium temperatures and low pressures. |
| Skarn
- high temperature and low pressure reaction product consisting of carbonates,
silicates and metal sulfides and oxides. |
Copyright William C. Wilson 1997
Send email to wcw@dragonlogic.com
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