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 …

The breakup of Laurasia to form the Northeast Atlantic Realm disintegrated an
inhomogeneous collage of cratons sutured by cross-cutting orogens. Volcanic rifted margins …

The maximum crystallization temperature of mantle-derived melts provides constraints on
the minimum temperature of their mantle source regions. This temperature can be estimated …

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 …

Continental basalts generally display enrichment of fluid-mobile elements and depletion of
high-field-strength elements, similar to those that evolved in the subduction environment, but …

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 …

The magmatic activity (0–16 Ma) in Iceland is linked to a deep mantle plume that has been
active for the past 62 My. Icelandic and northeast Atlantic basalts contain variable …

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 …