Retrograde contact meta-morphism in the granulite facies terrain of Mont Tremblant Park, Quebec, Canada
1968; Cambridge University Press; Volume: 105; Issue: 5 Linguagem: Inglês
10.1017/s001675680005487x
ISSN1469-5081
Autores Tópico(s)Geological formations and processes
ResumoSUMMARY The Pre-Cambrian rocks of the Grenville province of south-west Quebec in the Mont Tremblant Park area consists of granulites and associated gneisses formed under granulite facies conditions which are intruded by members of an anorthosite suite. At the contacts of these intrusives especially the late-stage members, the granulites and gneisses were found to be retrograded into rocks with mineral assemblages typical of the amphibolite facies. The transformation of the granulite facies rocks into rocks of lower amphibolite grade can be attributed to local introduction of water which was supplied during the emplacement and crystallization of this late-stage, volatile-enriched magma of the anorthosite suite.
Referência(s)