We developed a model of feldspar nucleation delay during decompression in water-saturated rhyolite based on classical theory (CNT). With the thermodynamic and kinetic parameters proposed this study, agrees with experimental results study to within factor two. To account for variety conditions encountered by magma ascent, we propose expanding model, isothermal decompression, wider range pressure...

Glossary andesite magma or volcanic rock is characterised by intermediate SiO2 concentration. Andesite magmas have rheological properties that are intermediate between basalt and rhyolite magmas. Silica content in andesites ranges from approximately 52 to 66 weight percent. Common minerals in andesite include plagioclase, amphibole and pyroxene. Andesite is typically erupted at temperatures bet...

A retrograde sequence of fluid-controlled, lowtemperature mineral reactions has been preserved along an east-west striking, dextral-oblique-slip fault in the uplifted Rhine Graben shoulder. This fault (the Schauenburg Fault, near Heidelberg), juxtaposes Permian rhyolite against Carboniferous (Variscan) granite and shows synor post-rift displacement of the north–south trending, eastern boundary ...