Ubiquitous heterogeneity in the Earth's mantle has been documented by numerous
chemical and isotopic analyses of oceanic basalts. Despite the ever-increasing amount of …

Noble gas isotope systematics, particular those of He, have been fundamental in showing
that some ocean island basalts (OIB) were sourced from deep mantle plumes. Relationships …

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 …

Evidence for the capture of nebular gases by planetary interiors would place important
constraints on models of planet formation. These constraints include accretion timescales …

The energy associated with giant impacts is large enough to generate global magma
oceans during Earth's accretion. However, geochemical evidence requiring a terrestrial …

Combined Pb‐Sr‐Nd‐Hf‐Os isotopes, together with major and trace element compositions,
were determined from clinopyroxene and olivine phenocrysts, along with whole rocks, for …

Hotspot lavas erupted at ocean islands exhibit tremendous isotopic variability, indicating that
there are numerous mantle components, hosted in upwelling mantle plumes that generate …

This chapter describes the discovery of the noble gases and the development of the first
instrumentation used for noble gas isotopic analysis before outlining in very general terms …

Lavas from Mangaia in the Cook–Austral island chain, Polynesia, define an HIMU (or high μ,
where μ= U 238/Pb 204) global isotopic end-member among ocean island basalts (OIB) with …

New helium isotope and trace-element abundance data are reported for pyroxenites and
eclogites from South Africa, Siberia, and the Beni Bousera Massif, Morocco that are widely …