Article contents
Amphiboles and biotite in relation to the stages of metamorphism in granogabbro
Published online by Cambridge University Press: 05 July 2018
Summary
The Bratteggdalen granogabbro, a relict mass in the Caledonian amphibolites of Vestspitsbergen, shows a series of amphibole development reflecting its thermal history. A brown Ti-rich hornblende occurs as a late magmatic mantling of pyroxene. Low-grade metamorphism (greenschist facies) was accompanied by the development of actinolite from pyroxene; subsequent amphibolite facies metamorphism saw the development of an alkali-rich, blue-green hornblende. The chemical changes in the amphiboles are a succinct illustration of those found in progressive regional metamorphism.
- Type
- Research Article
- Information
- Copyright
- Copyright © The Mineralogical Society of Great Britain and Ireland 1974
References
- 4
- Cited by