Extremely voluminous magmatic systems known as large igneous provinces (LIPs)
punctuate Earth's history, and the gases they release plausibly link large-scale geodynamic …

The Earth's lithosphere can focus basaltic magmatism along pre-existing weakness zones or
discontinuities. However, apart from the influence on the geochemistry of magmas emplaced …

The observation that many lavas associated with mantle plumes have higher 3He/4He ratios
than the upper convecting mantle underpins geophysical, geodynamic and geochemical …

The hydrogen-isotope [deuterium/hydrogen (D/H)] ratio of Earth can be used to constrain the
origin of its water. However, the most accessible reservoir, Earth's oceans, may no longer …

Abstract The short-lived 182 Hf-182 W isotope system (t 1/2= 9 Ma) left evidence in both
ancient and modern terrestrial rock record of processes that took place during the earliest …

Volcanic hotspots are thought to be fed by hot, active upwellings from the deep mantle, with
excess temperatures (T ex)~ 100° to 300° C higher than those of mid-ocean ridges …

The oxygen fugacities of nine mantle-derived komatiitic and picritic systems ranging in age
from 3.55 Ga to modern day were determined using the redox-sensitive partitioning of V …

Young (61 Ma) unaltered picrites from Baffin Island, northeast Canada, possess some of the
highest 3 He/4 He (up to 50 Ra) seen on Earth, and provide a unique opportunity to study …

Helium isotopes provide an important tool for tracing early-Earth, primordial reservoirs that
have survived in the planet's interior,,. Volcanic hotspot lavas, like those erupted at Hawaii …

The mantle perspective provided by radiogenic isotope geochemistry has evolved over the
last 40 years. Although the idea of an upper mantle depleted in incompatible elements by …