Trondhjemite
Template:Short description Script error: No such module "Infobox". Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". Trondhjemites that occur in the oceanic crust or in ophiolites are usually called plagiogranites.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
Trondhjemite is common in Archean terranes occurring in conjunction with tonalite and granodiorite as the TTG (tonalite–trondhjemite–granodiorite) orthogneiss suite.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". Trondhjemite dikes also commonly form part of the sheeted dike complex of an ophiolite.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
The rock type was first described by V.M. Goldschmidt in 1916. The name of the rock type is derived from the city of Trondheim, Norway.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
Notes
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References
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Further reading
- Best, Myron G. (2002) Igneous and Metamorphic Petrology, Blackwell Publishing, 2nd ed. Template:ISBN