Accessory Minerals in Silicic Igneous Rocks

Dear Colleagues,

Although minor in abundance and typically small in size, accessory minerals are of fundamental importance in deciphering the history of magmatic–hydrothermal systems. They may inherit information from magma sources, monitor the evolution of fractionating melts, and record information on mixing/mingling/contamination of melts. Accessory minerals constitute important geochronometers and essentially govern the enrichment/depletion of economically relevant elements. They may act as thermobarometers, and monitor the fluid regime in magmas and expelled fluids. Their textural and compositional patterns constrain the impact of rock–mineral–fluid interaction and how intense such processes have obscured the primary composition of igneous rocks.

This Special Issue invites contributions that deal with accessory minerals and their behaviour during the entire evolution of silicic magmatic–hydrothermal systems, from the time/source of melting through fractionation/mixing/mingling of the generated magma until the time/place of crystallization/solidification, expelling of fluids and eventual generation of mineral deposits. We welcome contributions that use accessory minerals for dating the crystallization and alteration ages of rocks, reconstruct their P–T–X conditions during magma evolution, and monitor their metallogenic fertility.

Dr. habil. Hans-Jürgen Förster
Guest Editor

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