Non-magmatic, fracture-controlled hydrothermal systems located within and near the Idaho batholith have been examined and evaluated for potential application as natural analogues to high-level nuclear waste repositories. Detailed geochemical, Ž . petrologic, and structural studies of hot springs along the South Fork of the Payette River SFPR in central Idaho, USA, have been combined to assess t...

This account is a progress report on geological mapping and field data compilation around part of the southern Cordillera LITHOPROBE transect in the lntermontane Belt. Objectives included integrating and improving the surface geological database for interpretation of the 1988 Vibroseis survey and reassessing the geological setting of mineral occurrences in the area. The transect route lies in t...

Abstract The Variscan orogeny was responsible for the formation of a significant volume igneous basement throughout present-day Europe. Detailed understanding these rocks has, however, been obfuscated by overprinting during younger geologic events. In order to better understand this basement, we present U–Pb dates, trace element concentrations and Hf isotope compositions zircon from 17 intrusio...