Abstract The Central Alpine lower crustal migmatitic Gruf complex was exhumed in contact to the greenschist-grade Chiavenna ophiolite and gneissic Tambo nappe leading a lateral gradient of ~ 70 °C/km within ophiolite. 14 km long, E-W striking subvertical now bridges metamorphic conditions 730 °C, 6.6 kbar gneisses 500 4.2 serpentinites schists 2–4 north contact. An obvious fault, mylonite or hi...

We describe a singular structure in Upper Cretaceous rocks of the Eaux-Chaudes massif western Pyrenees, consisting kilometre-scale fold nappe with sheared overturned limb. High ductile strain attests deformation style rarely reported for alpine and peak temperature carbonates is estimated by Raman spectroscopy carbonaceous material palaeothermometry lower greenschist facies (>300°C). The normal...

Abstract The Meran-Mauls nappe stack is part of the Austroalpine unit in South Tyrol (Italy). There it holds a special position directly front Southalpine Dolomites indenter and west Tauern Window. It situated hanging wall unit, above NW dipping segment Periadriatic fault system, namely fault. Also all other sides are defined by Oligocene-Miocene strike-slip normal faults. Based on recent mappi...

The Devonian massive sulfide orebodies of the West Shasta district in northern California are composed primarily of pyrite, with lesser amounts of other sulfide and gangue minerals. Examination of polished thin sections of more than 100 samples from the Mammoth, Shasta King, Early Bird, Balaklala, Keystone, and Iron Mountain mines suggests that mineralization may be divided into six paragenetic...

In southeastern British Columbia many inhusive suites lack conclusive radiometric age dates. The purpose of this BSc. project is to study three of the intrusions in the Purcell Mountain Range and provide uranium-lead geochronological results on two of these to refme the igneous magmatic history of the region. The White Creek Batholith (WCB) and the Greenland Creek Stock (GCS) are located approx...

The Posada Valley amphibolites in the inner zone of Variscan Sardinia are characterized by garnet porphyroblasts containing epidote, titanite, quartz, clinopyroxene, amphibole, and plagioclase concentrated core. matrix is made up amphibole fine-grained clinopyroxene plagioclase. recorded an HP stage, a metamorphic re-equilibration, third stage under greenschist facies. P–T conditions I (530–650...