The Solund–Hyllestad–Lavik area affords an excellent opportunity to understand the ultrahigh-pressure Scandian orogeny because it contains a near-complete record of ophiolite emplacement, high-pressure metamorphism and large-scale extension. In this area, the Upper Allochthon was intruded by the c. 434 Ma Sogneskollen granodiorite and thrust eastward over the Middle ⁄ Lower Allochthon, probably...

Based on lithological, structural and geophysical characteristics, the Proterozoic Grenville Orogen of southern Ontario and New York has been divided into domains that are separated from each other by ductile shear zones. In order to constrain the timing of metamorphism, U-Pb ages were determined on metamorphic and igneous sphenes from marbles, calc-silicate gneisses, amphibolites, granitoids, ...

Many of the definitions given below were adopted by the SCMR without difficulty; others gave rise to considerable debate. Problems arose for a variety of reasons, namely: the variable usage of terms across the geological community (e.g. gneiss and schist); terms such as slate and cleavage proved difficult because there are no similar terms in many non-English speaking countries; equally, the di...

The Bohai Bay Basin basement is mainly composed of Archean granitoid gneisses with minor supracrustal rocks and the largest basin in Eastern Block North China Craton. Due to a cover Mesozoic Cenozoic strata, little known about age crustal evolution this basement. In study we report new zircon SHRIMP LA-ICP-MS U-Pb Lu-Hf isotope data for drill core samples, including TTGs (granodiorite, tonalite...

Among the factors that contribute to adequate performance of aggregates, abrasion resistance these materials stands out, a parameter strongly related mineral composition rock. Therefore, this work aims analyze and integrate data from Los Angeles tests petrographic analysis gneisses Santa Catarina Granulithic Complex in order understand characteristics can interfere or control results, such as: ...