Results 51 to 60 of about 696,092 (361)
Alpine metamorphism of mafic rocks
Schweizerische Mineralogische Und Petrographische Mitteilungen, 1974 Metamorphosed mafic rocks in the Alps exhibit many characteristic mineral assemblages. They are used to study different phases of alpine metamorphism. The great variety of alpine metamorphosed mafic and ultramafic rocks is illustrated with a map of their distribution (plate I) and a listing showing their localities, size and thickness, metamorphic ...
Dietrich, Volker +2 more
openaire +3 more sources
Zircon dissolution in a ductile shear zone, Monte Rosa granite gneiss, northern Italy [PDF]
, 2008 The sizes, distributions and shapes of zircon grains within variably deformed granite gneiss from the western Alps have been studied. Zircon shows numerous indicators of a metamorphic response in both the host gneiss and a 5 cm wide continuous ductile ...
Dal Piaz +14 more
core +1 more source
Epitaxy and Topotaxy in the Aragonite‐Calcite Polymorphism
Crystal Research and Technology, EarlyView.At first distinguish epitaxy from topotaxy, which rule the main mechanisms of calcite‐aragonite transitions. Then, attempt to move from qualitative to quantitative descriptions of these transitions. Hence, it will deal with 2D (epitaxy) and 3D (topotaxy) conversions in the polymorphic system, in order to gain insight on their differences.
D. Aquilano +3 more
wiley +1 more source
Interpretation of zircon coronae textures from metapelitic granulites of the Ivrea–Verbano Zone, northern Italy: two-stage decomposition of Fe–Ti oxides [PDF]
Solid Earth, 2017 In this study, we report the occurrence of zircon coronae textures in metapelitic granulites of the Ivrea–Verbano Zone. Unusual zircon textures are spatially associated with Fe–Ti oxides and occur as (1) vermicular-shaped aggregates 50–200 µm long and
E. Kovaleva +3 more
doaj +1 more source
The Depositional Record, EarlyView.A new classification for inland freshwater palaeowetlands to be used in the field or core laboratory by sedimentologists, providing examples from the Guadix Basin (southern Spain). Abstract Present wetlands have proven to be delicate, biodiverse ecosystems, that are natural sinks for CO2 and act as good indicators for climate changes.
S. Pla‐Pueyo +1 more
wiley +1 more source
Relationship between Brittleness Index and Crack Initiation Stress Ratio for Different Rock Types
Advances in Civil Engineering, 2020 Brittleness and crack initiation stress (σci) are important rock mechanical properties and intrinsically related to rock deformation and failure. We establish the relationship between σci and uniaxial tensile strength (σt) based on the Griffith stress ...
Juyu Jiang +3 more
doaj +1 more source
Swiss Journal of Geosciences, 2021 Fluid assisted Alpine fissure-vein and cleft formation starts at prograde, peak or retrograde metamorphic conditions of 450–550 °C and 0.3–0.6 GPa and below, commonly at conditions of ductile to brittle rock deformation.
Edwin Gnos +5 more
doaj +1 more source
Geology of Byobu Rock and Gobanme Rock, Prince Olav Coast, East Antarctica [PDF]
, 2006 We report here the geology of Byobu Rock and Gobanme Rock outcrops hitherto unmapped in the Prince Olav Coast, East Antarctica. Both these outcrops expose high-grade metamorphic and igneous rocks.
M. Satish-Kumar +3 more
core +1 more source
Primary crustal melt compositions: Insights into the controls, mechanisms and timing of generation from kinetics experiments and melt inclusions [PDF]
, 2017 We explore the controls, mechanisms and timing of generation of primary melts and their compositions, and show that the novel studies of melt inclusions in migmatites can provide important insights into the processes of crustal anatexis of a particular ...
Acosta-Vigil, Antonio +6 more
core +1 more source
Water pathways and ancient lakes: Flowing towards new models to unravel the past
The Depositional Record, EarlyView.Abstract Significant progress has been made in understanding lake basin evolution through climatic and tectonic changes using sedimentology, sequence stratigraphy, geochemistry, hydrology and watershed characteristics to interpret three main lake basin types: overfilled, balanced‐fill and underfilled, including fluvio‐lacustrine systems.
Cecilia A. Benavente +2 more
wiley +1 more source