The formation of high-Sr/Y plutons in cordilleran-arc crust by crystal accumulation and melt loss

• Published in: Geosphere (Boulder, Colo.) Vol. 18; no. 2; pp. 370 - 393
• Main Authors: Brackman, Adam J, Schwartz, Joshua J
• Format: Journal Article
• Language: English
• Published: Geological Society of America 11.02.2022
• Subjects: alkaline earth metals; Australasia; chain silicates; clinopyroxene; crust; crystallization; diorites; electron probe data; Fiordland; Geochemistry; ICP mass spectra; igneous and metamorphic rocks; igneous rocks; intrusions; isotope ratios; isotopes; magmas; magmatism; Malaspina Pluton; mass spectra; melts; metals; Misty Pluton; Mohorovicic discontinuity; New Zealand; P-T conditions; Petrology; plutonic rocks; plutons; pyroxene group; rare earths; silicates; South Island; Southland New Zealand; spectra; Sr/Y; strontium; X-ray fluorescence spectra; yttrium

Bulk-rock data are commonly used in geochemical studies as a proxy for melt compositions in order to understand the evolution of crustal melts. However, processes of crystal accumulation and melt migration out of deep-crustal, crystal-rich mush zones to shallower storage regions raise questions abou...