Igneous structure and texture of the ~1.3 Ga Hosenbein anorthosite pluton (Nain, Labrador) and implications for the crystallization of massif-type anorthosite

• Published in: Atlantic Geology
• Main Author: Voordouw, Ronald J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Atlantic Geoscience Society 2010
• Subjects: Igneous petrology; massif anorthosite; Nain
• Online Access: https://journals.lib.unb.ca/index.php/ag/article/view/atlgeol.2010.003

The ca. 1315 Ma Hosenbein massif-type anorthosite pluton (Nain, Labrador) shows complete exposure of a vertical section, described here for the first time, comprising a ~2000 m-thick Main Zone bound by a ~200 m-thick Marginal Zone. The pluton as a whole consists mostly of monocumulate leucogabbronor...