Lower Crustal Cumulate Nodules in Proterozoic Dikes of the Nain Complex: Evidence for the Origin of Proterozoic Anorthosites
Nodules and xenocrysts dominated by high-A1 orthopyroxene occur in Proterozoic basaltic dikes that cut the Nain anorthosite complex, Labrador. This pyroxene (En 73–68 , Al 2 O 3 = 6.5–4.5) lacks exsolution and occurs both as anhedral xenocrysts up to 10 cm in diameter and with euhedral plagioclase (...
| Published in: | Journal of Petrology |
|---|---|
| Main Author: | |
| Format: | Text |
| Language: | English |
| Published: |
Oxford University Press
1986
|
| Subjects: | |
| Online Access: | http://petrology.oxfordjournals.org/cgi/content/short/27/6/1253 https://doi.org/10.1093/petrology/27.6.1253 |