The small reservoir of carbon dioxide in the atmosphere (pCO2) that modulates climate through the greenhouse effect reflects a delicate balance between large fluxes of sources and sinks. The major long-term source of CO2 is global outgassing from sea-floor spreading, subduction, hotspot activity, and metamorphism; the ultimate sink is through weathering of continental silicates and deposition o...

Field emission scanning electron microscopy (FESEM), two-dimensional X-ray diffraction (2DXRD), and transmission electron microscopy coupled with selected area electron diffraction (TEMSAED) analyses of the reactant/product textural relationship show that the thermal decomposition of Iceland spar single crystals according to the reaction CaCO3(s) → CaO(s) + CO2(g) is pseudomorphic and topotacti...

Earthquakes are the result of slip along faults and are due to the decrease of rock frictional strength (dynamic weakening) with increasing slip and slip rate. Friction experiments simulating the abrupt accelerations (>>10 m/s2), slip rates (~1 m/s), and normal stresses (>>10 MPa) expected at the passage of the earthquake rupture along the front of fault patches, measured large fault dynamic we...

Concrete is the second most used material worldwide and the first used man-made material. Its production entails large emissions of GHG due to lime decarbonation during the clinkering process, as well as large consumption of non-renewable minerals and natural aggregates. Currently legislative pressure aiming at preserving natural resources is growing tighter on natural aggregates extraction, wh...

For most fires, forensic investigation takes place well after building materials have cooled and knowledge of the structural damage due to heat exposure can reveal the temperature reached during an incident. Recently, there have been significant changes in the types and hence characteristics of cementitious materials used in the United Arab Emirates. Few studies focus on the application of ther...

Abstract Understanding the Earth’s geological nitrogen (N) and carbon (C) cycles is fundamental for assessing distribution of these volatiles between solid Earth (core, mantle crust), oceans atmosphere. This Special Communication about N C contains material that relevant researchers who are interested in Topical Collection on planetary evolution “Reading Terrestrial Planet Evolution Isotopes El...

Ultramafic and carbonate-rich rocks juxtaposed in an oceanic sedimentary mélange that experienced Alpine subduction (Champorcher, Aosta Valley, Italy) show evidence of metasomatic alteration at their contacts. The reactions occurred these contacts afford assessment the sources compositions fluids associated with alteration, degree scale which mobilized carbon. At contacts, display calcite repla...

We investigate the late Cretaceous blueschist-facies (480 °C-1.8 GPa) segment of Zagros suture zone, a well-preserved block-in-matrix paleo-subduction channel. aim to determine relative chronology, conditions deformation, and potential fluid sources processes associated with widespread occurrence lawsonite + clinopyroxene glaucophane veins aragonite-bearing hydraulic breccias. use multi-scale a...

Cement is used globally in construction materials for nearly all civil infrastructure systems supporting improved quality of life, and there currently no substitute that can meet its functional capacity. The magnitude cement production leads to more than 7% annual anthropogenic greenhouse gas (GHG) emissions, resulting from both energy use chemical reactions, which imposes a notable barrier rea...

Post-disgorgement oxidative changes in bottle-fermented sparkling wines produced from Vitis vinifera and hybrid wine grape cultivars were examined with ascorbic acid and sulfur dioxide treatments added at disgorgement. Wines were stored 11 months at 21 °C before analysis. Acetaldehyde was highest and browning was lowest in the sulfur dioxide treatments. Ascorbic acid after the storage period wa...