The origin and significance of crystal rich inclusions in pumices from two Chilean ignimbrites
Abstract
Crystal rich magmatic inclusions in pumices for compositionally heterogeneous ignimbrites from the Central Andes of northern Chile are studied. The dark bands are interpreted as inclusions of accumulated crystals resulting from crystal fractionation from the same magmas as the host pumice. It is suggested that the accumulations result from boundary layer crystallization at the sidewalls of magma chambers.
- Publication:
-
Geological Magazine
- Pub Date:
- March 1989
- DOI:
- 10.1017/S0016756800006300
- Bibcode:
- 1989GeoM..126..159D
- Keywords:
-
- Crystals;
- Inclusions;
- Magma;
- Mineralogy;
- Petrology;
- Pumice;
- Andes Mountains (South America);
- Chemical Composition;
- Chile;
- Crystallization;
- Geochemistry;
- Photomicrography