Abstract Water content plays a significant role in magma genesis, ascent rate, and, ultimately, the style and intensity of volcanic eruptions, due to its control on density, viscosity melting behaviour silicate melts. A reliable method for determining pre-eruptive magmatic water is use phenocrysts nominally anhydrous minerals (NAMs) which can preserve as hydrogen configurations structural defec...

Abstract Bimodal volcanism occurs in a range of extensional environments that are characterized by distinctive but overlapping, lithogeochemical and isotopic signatures lithological assemblages. Where basaltic magmatism is associated with ferroan (A‐type) rhyolites, it typically the lithogeochemistry systematics rocks most beneficial constraining tectonic evolution. This study presents geochemi...

Volatile emissions to the atmosphere associated with Siberian Traps eruptions at Permian-Triassic boundary were sourced from outgassing of primary magmas and sedimentary host rocks into which they intruded. Halogens in volcanic gases may have played an important role environmental degradation stratospheric ozone destruction. Here we investigate how halogens behave during interaction between sal...

Abstract The influence of Hainan mantle plume and subducting recycled oceanic crust beneath the spreading ridge South China Sea (SCS) have been widely proposed recently, but still controversial ambiguous. Here, we present seismic tomographic evidence, new major trace element, Pb isotopic compositions volcanic glasses from one International Ocean Drilling Program drill core (Site U1434) in SCS r...

Abstract Glasses quenched from relatively undegassed ocean island magmas erupted volcanoes at Iceland, Hawaii, the Canary Islands, and Erebus have elevated Fe 3+ /∑Fe ratios compared to glasses mid-ocean ridge basalts. This has been ascribed f O 2 of their mantle sources, plausibly due subducted, oxidized near-surface-derived components in sources. The basaltic Reunion Island Indian Sr–Nd-Hf-Pb...

This contribution reviews the effects of source heterogeneities, melt-rock reactions and intracrustal differentiation on magma chemistry across mid-ocean ridges, intraplate settings subduction zones using experimental studies natural data. We compare melting behaviors pyroxenites peridotites their relative contributions to magmas as functions composition, mantle potential temperatures lithosphe...

Abstract Recycling of material at subduction zones has fundamental implications for melt composition and mantle rheology. Ocean island basalts (OIBs) sample parts the from variable depths that have been diversely affected by zone processes materials, including subducted slab, metasomatising melts fluids. Resultant geochemical differences are preserved a variety scales inclusions to whole rocks,...

The accretionary processes and the continental growth of Altaids are still controversial. Beishan orogen is situated in southernmost an ideal tectonic site to address these issues. In this study, we report results new field-based lithological mapping structural analysis on Huaniushan complex orogen, which composed blocks serpentinized ultramafic, gabbro, basalt, chert, limestone, other rocks wi...