Magmatic Na-rich phlogopite in a suite of gabbroic crustal xenoliths from Volcán San Pedro, Chilean Andes : evidence for a solvus relation between phlogopite and aspidolite

• Main Authors: Costa, Fidel, Dungan, Michael, Singer, Brad S.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2012
• Subjects: DRNTU::Science::Geology
• Online Access: https://hdl.handle.net/10356/95483; http://hdl.handle.net/10220/8721; http://ammin.geoscienceworld.org.ezlibproxy1.ntu.edu.sg/content/86/1-2.toc
• Institution: Nanyang Technological University

Magmatic Na-rich phlogopite (1–5 wt% Na2O) is present as a late-crystallizing mineral in two groups of texturally and mineralogically distinct gabbroic xenoliths at Volcán San Pedro (36°S, Chile), an Andean arc volcano. Phlogopites are characterized by high 100·Mg/(Mg + Fe) (up to 83) and high Cr2O3...