Abstract Apatite can incorporate significant amounts of H2O and CO2, potentially recording volatile abundance behavior during magma evolution. Here we conducted in situ measurements CO2 concentrations apatite, along with elemental compositions, from two contemporaneous alkaline volcanic suites (Tianbao Tudiling) the South Qinling belt central China to better understand contents evolving melts. ...

Here we report the first set of thallium (Tl) isotope data in alkaline rocks from North China Craton to constrain nature recycled materials metasomatized subcontinental lithospheric mantle. Samples Hekanzi and Saima complexes display Tl compositions (ε205Tl) identical present-day upper mantle continental crust, suggesting that neither low-temperature altered oceanic crust nor pelagic sediments ...

[1] A new monthly volcanic forcing dataset is included in a coupled GCM for a more physically consistent treatment of the stratospheric sulfate aerosol history from explosive volcanism. The volcanic forcing is different from previous versions in that there is an individual evolution of the aerosol for each event. Thus the seasonal and latitudinal dependence of the volcanic aerosol can affect gl...

[1] We present measurements of the phase function and degree of linear polarization for unpolarized incident light as a function of the scattering angle for El Chichón and Pinatubo volcanic ashes at 633 nm. The results are combined and compared with those for Pinatubo at 442 nm and Lokon volcanic ash at 442 and 633 nm [Volten et al., 2001]. The three samples of volcanic ashes consist of micron ...

Shallow-water coral reef ecosystems, particularly those already impaired by anthropogenic pressures, may be highly sensitive to disturbances from natural catastrophic events, such as volcanic eruptions. Explosive volcanic eruptions expel large quantities of silicate ash particles into the atmosphere, which can disperse across millions of square kilometres and deposit into coral reef ecosystems....

Risk management stakeholders in high-populated volcanic islands should be provided with the latest high-quality volcanic information. We present here the first volcanic susceptibility map of Lanzarote and Chinijo Islands and their submarine flanks based on updated chronostratigraphical and volcano structural data, as well as on the geomorphological analysis of the bathymetric data of the submar...

Industrial chlorofluorocarbons that cause ozone depletion have been phased out under the Montreal Protocol. A chemically driven increase in polar ozone (or "healing") is expected in response to this historic agreement. Observations and model calculations together indicate that healing of the Antarctic ozone layer has now begun to occur during the month of September. Fingerprints of September he...

An 8 year volcanic SO2 emission inventory for 2005–2012 is obtained based on satellite measurements of SO2 from OMI (Ozone Monitoring Instrument) and ancillary information from the Global Volcanism Program. It includes contributions from global volcanic eruptions and from eight persistently degassing volcanoes in the tropics. It shows significant differences in the estimate of SO2 amount and in...

We present a study of the brittle tectonics Tunas Alkaline Complex focusing on kinematic and geometric analysis faults shear zones deforming complex. The data acquired respective interpretations sought to contribute post-Cretaceous tectonic structural models southern Brazil. ~83 Ma-old alkaline complex is made up syenites, alkali plutonic volcanic breccias, as well trachyte, microsyenite, bosto...

Detailed mineralogical analyses in areas with surface hydrothermal alteration zones associated recent volcanism (<1 Ma) the Central Andean Volcanic Zone could provide key information to unravel presence of hidden geothermal systems. In Cordón de Inacaliri Complex, a field an estimated potential ~1.08 MWe·km?2 has been recently discovered. this work, we focus on and discharge products area, a...