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A proposed new mineralogical classification system for granitic pegmatites
Mineralogy and mineral chemistry of quartz: A review
The Serra Branca amazonite pegmatite of the Vieirópolis pegmatite field, Paraíba, Brazil: A new and unusual megacrystic amazonite deposit
The distribution and enrichment of scandium in garnets from the TØrdal pegmatites, south Norway, and its economic implications
New age constraints on the formation of Sveconorwegian pegmatites
A proposed new mineralogical classification system for granitic pegmatites – Part I: History and the need for a new classification
A Tribute To Milan Novák
Alkali-F-Rich Albite Zones in Evolved NYF Pegmatites: The Product of Melt–melt Immiscibility
A Comparison of the Mica Geochemistry of the Pegmatite Fields in Southern Norway
The Sveconorwegian Pegmatite Province – Thousands of Pegmatites Without Parental Granites
Composition of zircons from the Cornubian Batholith of SW England and comparison with zircons from other European Variscan rare-metal granites
The Chemistry of Quartz in Granitic Pegmatites of Southern Norway: Petrogenetic and Economic Implications
Origin and significance of the yellow cathodoluminescence (CL) of quartz
A Newly Discovered Swarm of Shear-Zone-Hosted Bi–As–Fe–Mg–P-Rich Aplites and Pegmatites in the Hagendorf–Pleystein Pegmatite Province, Southeastern Germany: A Step Closer to the Metamorphic Root of Pegmatites
Petrogenetic implications of magmatic garnet in granitic pegmatites from Southern Norway
The potential of igneous quartz for providing a better understanding of magmatic processes is demonstrated by studying late-Hercynian rhyolites and granites from central and western Europe. Cathodoluminescence (CL) reveals growth patterns and alteration structures within igneous quartz reflecting the magma crystallisation history. The relatively stable and blue-dominant CL of zoned phenocrysts is principally related to variations in the Ti concentration, which is a function of the crystallisation temperature. The Al/Ti ratio of igneous quartz increases with progressive magma differentiation, as Ti is more compatible, compared to Al, Li, K, Ge, B, Fe, P during magma evolution. The red-dominant CL of the anhedral groundmass quartz in granite is unstable during electron bombardment and associated with OH- and H 2 O-bearing lattice defects. Thus, CL properties of quartz are different for rocks formed from H 2 O-poor and H 2 O-rich melts. Both groundmass and phenocrysts in granites are rich in alteration structures as a result of interaction with deuteric fluids during cooling, whereas phenocrysts in extrusive rocks do not usually contain such structures. The combined study of trace elements along with the analysis of quartz textures and melt inclusion inventories may reveal detailed PTX-paths of granite magmas. This study shows that quartz is a sensitive indicator for physico-chemical changes during the evolution of silica-rich magmas. Common growth textures show a wide variety in quartz phenocrysts in rhyolites and some granites. This paper presents a classification of textures, which formed as a result of heterogeneous intra-granular lattice defects and impurities. The alternation of growth and resorption microtextures reflects stepwise adiabatic and non-adiabatic magma ascent, temporary storage of magma in reservoirs and mixing with more mafic, hotter magma. The anhedral groundmass quartz overgrowing early-magmatic phenocrysts in granites is free of growth zoning.