The exposed residual crust in the Eastern Ghats Province records ultrahigh temperature (UHT) metamorphic conditions involving extensive crustal anatexis and melt loss. However, there is disagreement about the tectonic evolution of this late Mesoproterozoic–early Neoproterozoic orogen due to conflicting petrological, structural and geochronological interpretations. One of the petrological disput...

We have found corundum in direct contact with quartz and biotite as inclusions garnet the pelitic gneisses of northern Austkampane Northeastern (NE) Terrane Sør Rondane Mountains (SRM), East Antarctica. Our samples, which include corundum–bearing gneisses, show petrographic features such staurolite garnet, compositional zoning orthoamphibole Al decreasing toward rims, late–stage cordierite form...

A body of dolomite marble near Chotěboř was found in migmatized biotite paragneiss the Moldanubicum directly on border with migmatites/orthogneisses Kutná Hora Crystalline Complex. The area underwent significant tectonic reworking rocks along Přibyslav mylonite zone. Therefore, only small relics early prograde HT/LP metamorphism at T > 650 - 700 °C were preserved this marble. They are repres...

Major tin (Sn) deposits within the Variscan orogen are closely related to 325–270 Ma postkinematic granites that intruded metamorphic rocks of former precollisional accretionary wedge Gondwana margin. In Erzgebirge (Germany), some these metasedimentary have high Sn contents (locally more than 1000 ppm Sn). We report cassiterite (SnO2) U-Pb ages 395–365 and in prograde biotite rocks. These data ...

Introduction We investigated two processes in a series of the Hungarian L-chondrites: shock and thermal metamorphism. Thermal metamorphism transforms the textures in the relatively small chondritic planetary body. Shock metamorphism is caused by hypervelocity impact processes transforming texture and mineral structure mainly in the outermost layers of the chondritic planetary body [1,2]. The pu...

introduction the avan cu-fe skarn is located at the southern margin of qaradagh batholith, about 60 km north of tabriz. the skarn-type metasomatic alteration is the result of qaradagh batholith intrusion into the upper cretaceous impure carbonates. the studied area belongs to the central iranian structural zone. in regional scale, the studied area is a part of the zangezour mineralization zone ...

The spatial signatures of retrograde spanwise vortices in wall turbulence are assessed from particle-image velocimetry measurements in the streamwise–wall-normal plane of a zero-pressure-gradient turbulent boundary layer at Reτ ≡ u∗δ/ν=2350. The present results suggest that a proportion of retrograde spanwise vortices have a welldefined spatial relationship with neighbouring prograde vortices. ...

[1] Convergent margin magmas typically have geochemical signatures that include elevated concentrations of large-ion lithophile elements; depleted heavy rare earth elements and high field strength elements; and variously radiogenic Sr, Pb, and Nd isotopic compositions. These have been attributed to the melting of depleted mantle peridotite by the fluxing of fluids or melts derived from subducti...