plagioclase

05/01/2020 - "Our study suggests that, in plagioclase, shock amorphization is initially localized either within pre-existing twins or along lamellae, with similar characteristics to planar deformation features (PDFs) but that resemble twins in their periodicity. "
01/01/2017 - "In the first combined study of its kind, this study demonstrates that over ~4.5 Ga of impact processing, plagioclase is on average weakly shocked (<15 GPa) and examples of high shock states (>30 GPa; maskelynite) are uncommon. "
05/01/2020 - "In particular, constraining the initiation and progression of shock-induced amorphization in plagioclase (i.e., conversion to diaplectic glass) would improve our knowledge of how shock progressively deforms plagioclase. "
05/01/2020 - "However, the response of plagioclase to shock metamorphism remains poorly understood. "
05/01/2020 - "Shock metamorphism in plagioclase and selective amorphization."

01/01/2018 - "Primitive arc cumulates have negative Eu anomalies, which, in the absence of plagioclase, can only be explained by Eu being partly reduced. "
04/14/1989 - "Closed-system partial melts of hydrated, metamorphosed arc basalts and andesites (greenstones and amphibolites), where only water structurally bound in metamorphic minerals is available for melting (dehydration melting), are generally water-undersaturated, coexist with plagioclase-rich, anhydrous restites, and have compositions like island arc tonalites. "
01/01/2018 - "We use the redox-sensitive behavior of europium (Eu) in deep-seated, plagioclase-free arc cumulates to directly constrain the redox evolution of arc magmas at depth. "
01/29/2015 - "This suggests that crustal thickness exerts a first order control on the Sr/Y variability of arc magmas through the stabilization or destabilization of mineral phases that fractionate Sr (plagioclase) and Y (amphibole ± garnet). "

09/01/2022 - "Transport of H2O into nearby plagioclase induces the formation of diagnostic eclogite facies assemblages of jadeite-zoisite-K-feldspar-quartz ± kyanite ± phengite that pervasively replace former cm-sized plagioclase without requiring the participation of free H2O. "
01/01/2021 - "ASB basalts transferred rapidly from pressures (~0.7-2 GPa) at the plagioclase-spinel peridotite facies boundary to the surface. "

12/01/2012 - "Tested mineralogical weathering indices were Weathering Potential Index (WPI), Ruxton ratio (R), Weathering Index of Parker (WIP), Vogt's Residual Index (V), Chemical Index of Alternation (CIA), Chemical Index of Weathering (CIW), Plagioclase Index of Alternation (PIA), Silica-Titania Index (STI), Weathering Index of Miura (Wm), and Weatherability index of Hodder (Ks). "
02/01/2022 - "Geochemical indexes of weathering (R - Silica/Alumina, CIW - Chemical Index of Weathering, CIA - Chemical Index of Alteration, WIP - Weathering Index of Parker, PWI -Product of Weathering Index, Vogt Ratio, PIA - Plagioclase Index of Alteration, STI - Silica-Titanium Index, B/A - Bases/Alumina, B/R - Bases/R2O3, Si/R - Silica/R2O3, Weathering indexes WI-1 and WI-2, Si/Ses - Silica/Sesquioxides, Si/Fe - Silica/Iron, a - Potassium/Sodium, ba-1 - (Potassium-Sodium)/Alumina, ba-2 - (Calcium-Magnesium)/Alumina, Ba - (Potassium-Sodium-Calcium)/Alumina) were calculated. "

07/01/1994 - "Pseudotachylytes in the Bergen arcs of western Norway contain microlites including omphacite, garnet, plagioclase, and quartz. "
07/19/2021 - "Using a mass balance model with a Monte Carlo approach, I show that Zn-MgO-SiO2 systematics can be quantitatively explained by a continuous transition from plagioclase-dominated fractionating assemblages in thin arcs to amphibole-garnet-magnetite-dominated assemblages in increasingly thicker arcs. "