Crystallization history of a zoned plagioclase
- 1 December 1974
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 39 (308) , 867-877
- https://doi.org/10.1180/minmag.1974.039.308.06
Abstract
Summary: Electron microprobe and textural data are used to deduce a crystallization history for plagioclase in the Grand Manan Island (Canada) diabase sheet. The plagioclase crystals consist of a prominent core (An79-67) surrounded by a distinctly more calcic zone (An82-76), which grades into a normally zoned mantle (An73-40). This zoning pattern is interpreted as reflecting the elevation of a dry diabase magma from at least 10 to 20 km to near surface conditions.Keywords
This publication has 4 references indexed in Scilit:
- Relations between coexisting basaltic and granitic magmas in a composite dikeAmerican Journal of Science, 1973
- Plagioclase stratigraphy; a record of magmatic conditions and events in a granite stockAmerican Journal of Science, 1968
- Mineralogy as a function of depth in the prehistoric Makaopuhi tholeiitic lava lake, HawaiiContributions to Mineralogy and Petrology, 1968
- Zoning in igneous plagioclase; normal and oscillatory zoningAmerican Journal of Science, 1962