The Cenozoic volcanic activity of the Harrat Ash Sham volcanic field in south of Syria is a part of the extensive magmatism that took place in the auxiliary extension faults along the Dead Sea Fault Zone from upper Eocene to Holocene. Pliocene volcanic rocks form an important part of igneous succession in Syrian Part of Harrat as Sham. These rocks vary from basalts flows to scoria. Pliocene bas...

We present new H2O and CO2 solubility data in mafic to intermediate alkaline magmas from Fasnia Garachico volcanoes, Tenerife. H2O- CO2-saturated experiments were conducted at ∼50–400 MPa, 1200 °C, fO2 2 log units below the NiNiO solid buffer 3.2 above it. Although existing models for alkali-rich broadly describe behaviour, associated errors are worthy of consideration since they usually exceed...

Since 2018, the submarine east flank of Mayotte Island (Comoros archipelago) is site a major eruption located at 3.5 km depth bsl on WNW-ESE volcanic ridge. Samples brought by oceanographic cruises carried out to monitor this seismo-volcanic crisis indicate that ridge built bimodal sodic alkaline magmatic series includes basanites and phonolites. A petrological study dredged samples allowed us ...

The isotopic data showed that there are two stages distinguished in the Cenozoic history of Darkhad depression volcanic activity, Late Oligocene initial stage (~28.0–26.6 Ma) and final Miocene – Early Pliocene (~5.8–4.2 Ma). It has been stated rocks only represented by trachybasalts; however, among final-stage basaltoids series shield-volcano hawaite-basanite-phonotephrite compex trachybasaltic...

Abstract Peridotite–magma interaction is important in establishing magma pathways through the mantle and metasomatism of lithospheric mantle. Reactions that consume orthopyroxene produce olivine clinopyroxene are particular interest because these reactions should lead to a redistribution trace elements between solid melt phases at equilibrium. This study examines silica-undersaturated alkaline ...

Decompression melting of the upper mantle produces magmas and volcanism at Earth's surface. Experimental petrology demonstrates that presence CO2 H2O enhances peridotite anywhere within down to approximately 200–300 km depth. The melts with compositions ranging from carbonate-rich silicate-rich unavoidably affects geophysical signals retrieved mantle. Geochemical investigations erupted intrapla...

The occurrence of mantle-derived peridotite xenoliths in phonolitic melts is a rare phenomenon, and commonly ascribed to mantle origin the phonolite. alternative possibility, that are transported into evolving phonolite by mafic magmas, has received little attention. A unique tephriphonolite lava with groundmass composition, from active Cumbre Vieja volcano La Palma (Canary Islands), allows tes...

Weizhou island, located in the north margin of South China Sea (SCS), is characterized by multi-stage volcanism, several eruption styles and craters, also youngest Quaternary volcanic island China. An on this may pose high risk to life property. However, eruptive history craters number location, their sequence characteristics are still being debated, which important for potential hazard assessm...