The solubilities of the assemblages albite + paragonite + quartz and jadeite + paragonite + quartz in H2O were determined at 500 and 600 !C, 1.0–2.25 GPa, using hydrothermal piston-cylinder methods. The three minerals are isobarically and isothermally invariant in the presence of H2O, so fluid composition is uniquely determined at each pressure and temperature. A phase-bracketing approach was u...

Abstract The Wolfsberg lithium deposit in Austria is one of the largest Li-Cs-Ta pegmatite resources Europe. part Austroalpine Unit Pegmatite Province Eastern Alps that formed during high-temperature, low-pressure Permian extensional event and was subsequently overprinted by Cretaceous eclogite-facies metamorphism Alpine orogeny. two types distinguished at deposit, amphibolite hosted-(AHP) mica...

The Wugongshan area is rich in medium–low temperature convective geothermal resources, among which there are more than 10 fields Wentang, Wanlongshan, Wenjia, Hongjiang, etc. There few basic geological studies the and their peripheral areas; thus far, no systematic research work into thermophysical parameters has been carried out. In this paper, 85 rock samples were collected from surface boreh...

The Pelona, Orocopia, and Rand Schists and the schists of Portal Ridge and Sierra de Salinas constitute a high–pressure-temperature terrane that was accreted beneath North American basement in Late Cretaceous–earliest Tertiary time. The schists crop out in a belt extending from the southern Coast Ranges through the Mojave Desert, central Transverse Ranges, southeastern California, and southwest...

We present a detailed and quantitative examination of the thermodynamics and phase change mechanisms (including amorphization) that occur upon shock wave loading and unloading of silica. We apply DebyeGrüneisen theory to calculate both the Hugoniot of quartz and isentropic release paths. Quartz converts to stishovite between 15 and 46 GPa without undergoing pressure-induced amorphization and pe...

The Nahal Yael basin is underlain chiefly by schist, amphibolite, and granite. Thin (generally < 1 m thick), grussy colluvium which covered the lower portions of granitic hillslopes in the late Pleistocene has now been stripped completely, causing marked contrasts in outcrop morphologies, even where there is no contrast of fracture density or petrologic characteristics. Formerly mantled slopes ...

Collisional orogens commonly include mono-metamorphic and poly-metamorphic units, their different evolution can be difficult to recognize reconcile. The Theodul Glacier Unit (TGU) in the Western Alps consists of an association metasedimentary metamafic rocks embedded within Zermatt-Saas tectonic unit. In spite recent petrological studies, it remains unclear whether these underwent one or multip...